What is planted in saline-alkali land?

Question 1: What crops are suitable for saline-alkali land? Low-lying saline-alkali land has low terrain, poor drainage, strong evaporation, salt accumulation on the surface and deteriorating hydrogeological conditions. Therefore, tree species should be carefully selected for afforestation in low-lying saline-alkali land.

Arbor species

Robinia pseudoacacia root system can directly fix nitrogen, which is a pioneer tree species for afforestation in sandy saline-alkali land, but it is not suitable for planting in low-lying land with poor drainage.

Weeping willow. Likes to grow in wetlands and watersides, has moderate salt tolerance, and can be used as an important shelter forest tree species in saline-alkali land.

Salix chinensis is one of the fast-growing tree species in sandy saline-alkali land, which is resistant to water and humidity and suitable for growing in mild sulfate land. It can be planted on both sides of rivers and canals and saline-alkali depressions in waterlogged alkali areas, and should be used as pioneer trees and firewood forests. It is also a good tree species for farmland shelterbelts.

Ailanthus altissima, which grows rapidly, is a pioneer tree species for early afforestation in saline-alkali land, and can play the role of windbreak and embankment consolidation. It can be planted on both sides of the channel and on both sides of the road with higher terrain.

The salt tolerance of Melia azedarach is second only to that of Robinia pseudoacacia, and it can grow in arid and barren saline-alkali land with less pests, fast growth and strong germination.

Populus tomentosa grows well in fertile and humid places, and in mild saline-alkali land? It can grow normally and resist short-term flooding. Suitable for fast-growing and high-yield forests, farmland shelterbelts and excellent tree species around greening.

Taking hybrid poplar as an example, Poplar 46 and Poplar 69 in Lin Zhong grow normally when the soil salt content is 0.5%, the annual groundwater level is lower than 1 m, and there is water in rainy season. It is an excellent fast-growing tree species for timber forest, shelter forest and surrounding greening.

Elm is salt tolerant, and the soil grows well when the salt content does not exceed 0.4%. It can be used as an excellent tree species for timber forest, farmland shelterbelt and surrounding greening.

Mulberry. Strong salt tolerance and water resistance, and can be planted on both sides of farmland shelterbelt.

Pear tree is one of the fruit tree varieties with cold tolerance, waterlogging tolerance and moderate salt tolerance. Lidu pear, as the rootstock of grafted pear tree, has stronger waterlogging tolerance. It can grow on soil with 0.6% salt content.

Apricot is one of the most salt-tolerant alkaline fruit trees.

Jujube trees are not strict with soil, and can be cultivated except swamp and saline-alkali land. It has strong adaptability to soil pH, and there is no strict requirement for the level of groundwater. Even when the water is 30 cm ~ 70 cm for 30 days, the growth has no obvious effect.

Paulownia is suitable for growing in sandy saline-alkali land and is mainly used as farmland shelter forest, but it is afraid of flooding and is not resistant to moisture.

Shrub tree species

Amorpha fruticosa grows rapidly and has strong adaptability. It can be used as a low-grade tree species in windbreak belt in saline-alkali sandy area and grows well when the soil salt content is 0.4%.

White wax strip. It can grow in low humidity soil with salt content of 0.2% ~ 0.5%. It can be used as a tree species for greening and cultivating ash trees around. Can survive and grow after being flooded for many days.

Tamarix chinensis Drought-resistant, barren, highly saline-alkali-resistant, wind-proof, sand-fixing, bank protection, all levels of saline-alkali land and barren saline-alkali land on both sides of the channel can be planted.

Willow. Deciduous shrub, with rapid growth, strong adaptability and mild salt tolerance, can fix sand and revetment. Suitable for planting in mild saline-alkali wetland, saline-alkali land on river beach, plain slope and sandy alkali wasteland.

Question 2: What is suitable for saline-alkali land? In the soil improvement of fruit trees, fruit trees require good soil aggregate structure, deep soil layer and coordination of water, fertilizer, gas and heat. General loam, sandy loam and clayey loam are suitable for planting fruit trees, but when encountering clayey soil and sandy soil with poor physical and chemical properties, microbial organic fertilizer is needed for soil improvement.

Classification and improvement measures according to soil properties

(1) cohesive soil

Soil has low air content and poor permeability.

The way to improve this kind of soil is to add organic fertilizers such as crop straw and rice husk with high fiber content, which can effectively improve the permeability of this kind of soil.

(2) Sandy soil

The performance of water and fertilizer conservation is poor, the organic matter content is low, and the surface temperature changes dramatically. This kind of soil is usually improved by "filling silt" (mixing pond silt and river silt) combined with the application of organic fertilizer with high fiber content. In recent years, the use of "soil structure improver" has been reported abroad. Modifiers are mostly synthetic polymer compounds, which are applied to sandy soil as water-retaining agents or to promote the formation of particle structure in soil.

(3) Improvement of saline-alkali land

The main hazards of saline-alkali land are high salt content and ionic toxicity. When the soil salt content is 0.2% higher than the critical value of soil salt content, the concentration of soil solution is too high, and it is difficult for plant roots to absorb water and nutrients from it, resulting in "physiological drought" and lack of nutrition. In addition, the pH value of saline-alkali soil is high, generally above 8, which reduces the availability of various nutrients in the soil.

The improved technical measures are as follows:

(1) timely and reasonably irrigate, wash salt or add salt by pressing water.

② Apply more microbial organic fertilizer and plant green manure crops, such as alfalfa, sweet clover, lotus root, sesbania, alfalfa, thingrass, ryegrass, oats and mung beans. Improve the bad soil structure and improve the availability of nutrients in the soil.

(3) Chemical improvement, that is, applying soil improver to improve the aggregate structure and water retention of soil.

(4) intertillage (cutting off the capillaries on the soil surface), covering the ground, reducing excessive evaporation on the ground and preventing salt from rising.

(4) improvement of heavy clay

The hilly and mountainous areas in the south of China are mostly red loam, which is extremely sticky, easy to harden, low in organic matter content and serious in acidity. The improved technical measures are as follows:

① Mixed sand, also called exotic soil, is generally 1 clay+two or three parts sand.

② Increase the application of microbial organic fertilizer, plant a large number of green manure crops, improve soil fertility and adjust pH value. However, acid fertilizers should be avoided as far as possible, and phosphate fertilizer and lime (750~ 1050kg/hm2) can be used. Suitable green manure crops are: radish, Chinese milk vetch, Jin Juhua, cowpea, broad bean, February orchid, rice grass, vetch seed, rape and so on.

③ Soil management such as reasonable tillage, no-tillage or less tillage and planting grass.

(5) improvement of sandy wasteland

There are large areas of sandy wasteland in the old course of the Yellow River and northwest China. The soil in these areas is mainly composed of sand grains, and the organic matter is extremely scarce, and the temperature and humidity change greatly, so there is no ability to retain water and fertilizer. The improved technical measures are as follows:

① Set up windbreak forest net to prevent wind and fix sand.

(2) Excavate irrigation water sources, plant green manure crops on the surface and strengthen the coverage.

③ Combining soil improvement with siltation and applying microbial organic fertilizer.

(4) Applying soil improver such as Tremella aurantialba.

(6) adjusting the pH value of soil.

The pH value of soil has a great influence on the growth and development of various fruit trees. The availability of essential nutrients in soil, the activity of soil microorganisms, the ability of root system to absorb water and fertilizer, and the influence of harmful substances on root system are all related to the pH value of soil. The most suitable soil pH for pear is PH 5.5~8.5.

When the soil is too acidic, it can be adjusted by adding phosphate fertilizer and appropriate amount of lime, or planting alkaline green manure crops such as Chinese milk vetch and rape. Alkaline soil should be adjusted by adding appropriate amount of ferrous sulfate or planting acidic green manure crops such as alfalfa, sweet clover, lotus root and ryegrass.

Ecological improvement of soil and promotion of micro-ecological cycle are the most effective methods to improve soil at present. For example, the gold probiotic soil improver can effectively improve soil properties, improve soil fertility, reduce the use of chemical fertilizers and pesticides year by year and promote the formation of soil aggregate structure. It can comprehensively improve the ecological and physical and chemical properties of soil for three consecutive years and realize no-tillage planting. ...& gt& gt

Question 3: What is suitable for planting in saline-alkali land? Low-lying saline-alkali land has low terrain, poor drainage and strong evaporation, which makes salt accumulate on the surface and the hydrogeological conditions deteriorate. Therefore, tree species should be carefully selected for afforestation in low-lying saline-alkali land.

Arbor species

Robinia pseudoacacia root system can directly fix nitrogen, which is a pioneer tree species for afforestation in sandy saline-alkali land, but it is not suitable for planting in low-lying land with poor drainage.

Weeping willow. Likes to grow in wetlands and watersides, has moderate salt tolerance, and can be used as an important shelter forest tree species in saline-alkali land.

Salix chinensis is one of the fast-growing tree species in sandy saline-alkali land, which is resistant to water and humidity and suitable for growing in mild sulfate land. It can be planted on both sides of rivers and canals and saline-alkali depressions in waterlogged alkali areas, and should be used as pioneer trees and firewood forests. It is also a good tree species for farmland shelterbelts.

Ailanthus altissima, which grows rapidly, is a pioneer tree species for early afforestation in saline-alkali land, and can play the role of windbreak and embankment consolidation. It can be planted on both sides of the channel and on both sides of the road with higher terrain.

The salt tolerance of Melia azedarach is second only to that of Robinia pseudoacacia, and it can grow in arid and barren saline-alkali land with less pests, fast growth and strong germination.

Populus tomentosa grows well in fertile and humid places, can grow normally in mild saline-alkali land and can withstand short-term flooding. Suitable for fast-growing and high-yield forests, farmland shelterbelts and excellent tree species around greening.

Taking hybrid poplar as an example, Poplar 46 and Poplar 69 in Lin Zhong grow normally when the soil salt content is 0.5%, the annual groundwater level is lower than 1 m, and there is water in rainy season. It is an excellent fast-growing tree species for timber forest, shelter forest and surrounding greening.

Elm is salt tolerant, and the soil grows well when the salt content does not exceed 0.4%. It can be used as an excellent tree species for timber forest, farmland shelterbelt and surrounding greening.

Mulberry. Strong salt tolerance and water resistance, and can be planted on both sides of farmland shelterbelt.

Pear tree is one of the fruit tree varieties with cold tolerance, waterlogging tolerance and moderate salt tolerance. Lidu pear, as the rootstock of grafted pear tree, has stronger waterlogging tolerance. It can grow on soil with 0.6% salt content.

Apricot is one of the most salt-tolerant alkaline fruit trees.

Jujube trees are not strict with soil, and can be cultivated except swamp and saline-alkali land. It has strong adaptability to soil pH, and there is no strict requirement for the level of groundwater. Even when the water is 30 cm ~ 70 cm for 30 days, the growth has no obvious effect.

Paulownia is suitable for growing in sandy saline-alkali land and is mainly used as farmland shelter forest, but it is afraid of flooding and is not resistant to moisture.

Shrub tree species

Amorpha fruticosa grows rapidly and has strong adaptability. It can be used as a low-grade tree species in windbreak belt in saline-alkali sandy area and grows well when the soil salt content is 0.4%.

White wax strip. It can grow in low humidity soil with salt content of 0.2% ~ 0.5%. It can be used as a tree species for greening and cultivating ash trees around. Can survive and grow after being flooded for many days.

Tamarix chinensis Drought-resistant, barren, highly saline-alkali-resistant, wind-proof, sand-fixing, bank protection, all levels of saline-alkali land and barren saline-alkali land on both sides of the channel can be planted.

Willow. Deciduous shrub, with rapid growth, strong adaptability and mild salt tolerance, can fix sand and revetment. Suitable for planting in mild saline-alkali wetland, saline-alkali land on river beach, plain slope and sandy alkali wasteland.

Question 4: What plants can be planted in saline-alkali land? Saline-alkali land is suitable for planting crops: 1. Elaeagnus angustifolia is the most common tree species in northwest China, which can tolerate sulfate saline soil. Elaeagnus angustifolia can also reduce soil salinity. According to the determination, Elaeagnus angustifolia has strong salt tolerance. Although its growth is restrained, it can still become a forest after good tending and management. Therefore, according to the salt tolerance of Elaeagnus angustifolia, it can be planted in moderate and severe saline soil without improvement. Elaeagnus angustifolia's high salt tolerance makes it the main tree species to build farmland shelterbelt in saline-alkali land. 2. Castanopsis kawakamii is an evergreen shrub of Castanopsis of Theaceae, which is mainly distributed in the southern coastal areas of China. Its leaves are thick leathery, obovate or obovate-lanceolate, with serrate edges, dark green and shiny. The crown is tight, flat and graceful in natural state. Its growing environment is mostly in the crevices of the sea or on the slopes of the sea, so this tree species has strong resistance to poverty, drought, strong wind resistance and certain salinity. 3. Ulmus pumila can't grow when the content of soluble salt in 0.30 cm soil layer reaches 0.54%, but it grows well when the content of soluble salt in 0-37 cm soil layer is 0.38%. On 0.3% clay loam and desalted saline-alkali land, the degree of soil alkalization is the limiting factor that directly affects the growth of Ulmus pumila. When the degree of soil alkalization reaches 13%, Ulmus pumila can grow normally, but it will grow poorly when it reaches 20. 1%, and it will grow poorly or die when it reaches 25%. Therefore, elm can be planted in saline soil with soil salt content below 0.8%. 4. Bai Liu Bai Liu can grow on the saline soil with a salt content of about 0.3% along the Shandong coast. Bai Liu is resistant to water and humidity, and its leaf transpiration is large, which can effectively reduce the groundwater level and prevent the secondary salinization of soil. Bai Liu can be used as a common tree species for greening and shelterbelt in saline-alkali land with low humidity and soil salt content below 65438 0.0%. 5. Ash trees require deep and fertile soil, and can be selected when the salt content is 10%. Afforestation in fertile and sweaty soil below 0.5%. 6. Amorpha fruticosa is not a halophyte, but it has strong salt resistance and saline-alkali resistance. In coastal saline-alkali areas, Amorpha fruticosa can survive and grow under the conditions of soil salinity of 0.447 1% and rhizosphere soil salinity of 0.3%. However, when the soil salt content is 0.7 1.34%, when the rhizosphere soil salt content reaches about 0.5%, it will obviously suffer and the leaves will turn yellow and fall off. Amorpha fruticosa has strong waterlogging resistance and tsunami resistance, which can not only resist alkali, but also improve saline-alkali land. Planting Amorpha fruticosa forest in inland saline-alkali land of Hebei Province can reduce the soil salt content from six thousandths to two thousandths within five years, and in general, Amorpha fruticosa grows normally with the soil salt content below 0.56/0. Planting Amorpha fruticosa forest is an effective way to transform severe saline-alkali land. 7. Populus euphratica is mainly distributed in the desert valleys of Xinjiang, Gansu, Inner Mongolia, Ningxia, Qinghai and other provinces (regions) in China at 37-47' north latitude, with an altitude of about 250. 150m, the highest elevation in the eastern Pamirs is about 2300m. Populus euphratica has strong adaptability, salt and alkali tolerance, cold tolerance, early drying in the atmosphere, developed root system and strong germination. It is the only tall tree species naturally distributed in the front of sandstorm in barren areas. Populus euphratica can be planted in soil with PH 9.3 and salt content 1 .4759%, and it grows vigorously. Populus euphratica not only can absorb saline-alkali, but also has the special ability to eliminate saline-alkali. Populus euphratica can grow on sulfate soil, chloride saline soil and soda saline soil. Populus euphratica is a pioneer tree species for afforestation in saline-alkali land, but its growth is slow. It can be seen that the small X-Hu hybrid grows faster than Populus euphratica, and it is a promising tree species for afforestation in saline-alkali land, which is worth popularizing and utilizing. In a word, developing Populus euphratica forest and planting with small X-Hu hybrids are effective measures to accelerate the transformation of saline-alkali land and improve the harsh desert environment in the three northern regions. 8. Fraxinus mandshurica is one of the precious tree species, with excellent materials, developed roots, easy afforestation, high survival rate, stable growth and resistance to pests and diseases. Fraxinus mandshurica has certain salt tolerance. When the PH value is less than 8.5, the salt content is less than 0. 15%, and the total alkalinity is less than1.10 mg/100g. In addition, the salt tolerance of Fraxinus mandshurica also changes due to the difference of soil moisture and soil nutrients, that is, when the soil moisture content is high and the soil fertility is high. & gt

Question 5: What crops are suitable for saline-alkali land? Sweet sorghum is a crop with strong stress resistance. Drought tolerance, waterlogging tolerance, saline-alkali tolerance and barren tolerance. Compared with other crops, sweet sorghum is more suitable for saline-alkali land. The salt tolerance concentration of sweet sorghum is 0.5-0.9%, which is higher than that of corn (0.3-0.7%), wheat (0.3-0.6%) and rice (0.3-0.7%). After planting, it is easy, and it can grow well with little management.

China sweet sorghum is a new energy crop, which has been widely popularized by the country. Sweet sorghum is one of the important projects in the development of the Yellow River Delta. Widely used: sugar, wine, animal feed, ethanol raw materials, are the best choice. Sweet sorghum seed is a kind of precious farm food, and straw can be used as sugarcane retail. The yield of straw per mu is 654.38+ 10,000 Jin. From the form of bioenergy, it is imperative to promote the cultivation of sweet sorghum in China. Sweet sorghum requires little investment and can be used without watering. The highest yield per mu can reach more than 3000 yuan.

Question 6: Which medicinal materials are suitable for planting in saline-alkali land? Low-lying saline-alkali land has low terrain, poor drainage, strong evaporation, salt accumulation on the surface and deteriorating hydrogeological conditions. Therefore, tree species should be carefully selected for afforestation in low-lying saline-alkali land.

Arbor species

Robinia pseudoacacia root system can directly fix nitrogen, which is a pioneer tree species for afforestation in sandy saline-alkali land, but it is not suitable for planting in low-lying land with poor drainage.

Weeping willow. Likes to grow in wetlands and watersides, has moderate salt tolerance, and can be used as an important shelter forest tree species in saline-alkali land.

Salix chinensis is one of the fast-growing tree species in sandy saline-alkali land, which is resistant to water and humidity and suitable for growing in mild sulfate land. It can be planted on both sides of rivers and canals and saline-alkali depressions in waterlogged alkali areas, and should be used as pioneer trees and firewood forests. It is also a good tree species for farmland shelterbelts.

Ailanthus altissima, which grows rapidly, is a pioneer tree species for early afforestation in saline-alkali land, and can play the role of windbreak and embankment consolidation. It can be planted on both sides of the channel and on both sides of the road with higher terrain.

The salt tolerance of Melia azedarach is second only to that of Robinia pseudoacacia, and it can grow in arid and barren saline-alkali land with less pests, fast growth and strong germination.

Populus tomentosa grows well in fertile and humid places, can grow normally in mild saline-alkali land and can withstand short-term flooding. Suitable for fast-growing and high-yield forests, farmland shelterbelts and excellent tree species around greening.

Taking hybrid poplar as an example, Poplar 46 and Poplar 69 in Lin Zhong grow normally when the soil salt content is 0.5%, the annual groundwater level is lower than 1 m, and there is water in rainy season. It is an excellent fast-growing tree species for timber forest, shelter forest and surrounding greening.

Elm is salt tolerant, and the soil grows well when the salt content does not exceed 0.4%. It can be used as an excellent tree species for timber forest, farmland shelterbelt and surrounding greening.

Mulberry. Strong salt tolerance and water resistance, and can be planted on both sides of farmland shelterbelt.

Pear tree is one of the fruit tree varieties with cold tolerance, waterlogging tolerance and moderate salt tolerance. Lidu pear, as the rootstock of grafted pear tree, has stronger waterlogging tolerance. It can grow on soil with 0.6% salt content.

Apricot is one of the most salt-tolerant alkaline fruit trees.

Jujube trees are not strict with soil, and can be cultivated except swamp and saline-alkali land. It has strong adaptability to soil pH, and there is no strict requirement for the level of groundwater. Even when the water is 30 cm ~ 70 cm for 30 days, the growth has no obvious effect.

Paulownia is suitable for growing in sandy saline-alkali land and is mainly used as farmland shelter forest, but it is afraid of flooding and is not resistant to moisture.

Shrub tree species

Amorpha fruticosa grows rapidly and has strong adaptability. It can be used as a low-grade tree species in windbreak belt in saline-alkali sandy area and grows well when the soil salt content is 0.4%.

White wax strip. It can grow in low humidity soil with salt content of 0.2% ~ 0.5%. It can be used as a tree species for greening and cultivating ash trees around. Can survive and grow after being flooded for many days.

Tamarix chinensis Drought-resistant, barren, highly saline-alkali-resistant, wind-proof, sand-fixing, bank protection, all levels of saline-alkali land and barren saline-alkali land on both sides of the channel can be planted.

Willow. Deciduous shrub, with rapid growth, strong adaptability and mild salt tolerance, can fix sand and revetment. Suitable for planting in mild saline-alkali wetland, saline-alkali land on river beach, plain slope and sandy alkali wasteland.

Question 7: What crops are suitable for saline-alkali land? Northeast China: quick-acting improver, subsoiling technology, water supplement and salt spraying technology in soda saline-alkali land.

Northwest China: salt-tolerant crops, water-saving salt washing, salt suppression by plastic film mulching, pipeline drainage, etc.

Binhai: aquaculture, salt-tolerant cash crops, rice cultivation, etc.

Middle and upper reaches of the Yellow River: salt-tolerant crops, soil conditioners, and salt-controlled farming measures, such as drip irrigation under plastic film.

Huang-Huai-Hai Plain: It has a fine tradition of water-saving irrigation, lowering groundwater level and salt-tolerant crops. According to experts, saline-alkali land is not suitable for crop growth because of its high salt content and belongs to low-yield fields. Therefore, we should plant saline-alkali land on the basis of improving soil, increasing farmyard manure and planting salt-tolerant crops.

First, soil improvement. It is suggested that mixed sand should be used to improve the soil, with 300~400 cubic meters of Gaza per mu.

The second is to apply farmyard manure, more than 2,000 kilograms per mu, every year to improve the soil and improve fertility. Try not to use chemical fertilizer. If chemical fertilizers must be used, acid fertilizers, such as ammonium sulfate, potassium sulfate and calcium superphosphate, are used to neutralize alkalinity. Potassium chloride is not suitable because it will aggravate alkalinity.

The third is to plant alkali-tolerant crops, such as hemp, sunflower, sorghum and pasture.

Question 8: What plants should be planted in saline-alkali land in the north? After improvement, rice was the first choice, which was effective that year.

You can provide an improvement plan and find a fertile land for thousands of years.

Question 9: What fruit trees are suitable for planting in saline-alkali land? Low-lying saline-alkali land has low terrain and poor drainage. In addition, with the intense evaporation, salt is accumulating on the surface, and the hydrological and geological conditions are deteriorating. Therefore, afforestation in low-lying saline-alkali land should be carefully selected.

Trees that can be planted in saline-alkali land mainly include: Sophora japonica, Bai La, Populus tomentosa, weeping willow, cortex fraxini, Albizia Albizziae, cypress, pomegranate, Begonia xifu, Euonymus japonicus, Lagerstroemia indica, okra, Chinese rose, golden willow, Luan tree, Robinia pseudoacacia, Broussonetia papyrifera, Berberis purpurea and other salt-tolerant flowers and trees.

Question 10: What crops are suitable for saline-alkali land? Low-lying saline-alkali land has low terrain, poor drainage, strong evaporation, salt accumulation on the surface and deteriorating hydrogeological conditions. Therefore, tree species should be carefully selected for afforestation in low-lying saline-alkali land.

Arbor species

Robinia pseudoacacia root system can directly fix nitrogen, which is a pioneer tree species for afforestation in sandy saline-alkali land, but it is not suitable for planting in low-lying land with poor drainage.

Weeping willow. Likes to grow in wetlands and watersides, has moderate salt tolerance, and can be used as an important shelter forest tree species in saline-alkali land.

Salix chinensis is one of the fast-growing tree species in sandy saline-alkali land, which is resistant to water and humidity and suitable for growing in mild sulfate land. It can be planted on both sides of rivers and canals and saline-alkali depressions in waterlogged alkali areas, and should be used as pioneer trees and firewood forests. It is also a good tree species for farmland shelterbelts.

Ailanthus altissima, which grows rapidly, is a pioneer tree species for early afforestation in saline-alkali land, and can play the role of windbreak and embankment consolidation. It can be planted on both sides of the channel and on both sides of the road with higher terrain.

The salt tolerance of Melia azedarach is second only to that of Robinia pseudoacacia, and it can grow in arid and barren saline-alkali land with less pests, fast growth and strong germination.

Populus tomentosa grows well in fertile and humid places, and in mild saline-alkali land? It can grow normally and resist short-term flooding. Suitable for fast-growing and high-yield forests, farmland shelterbelts and excellent tree species around greening.

Taking hybrid poplar as an example, Poplar 46 and Poplar 69 in Lin Zhong grow normally when the soil salt content is 0.5%, the annual groundwater level is lower than 1 m, and there is water in rainy season. It is an excellent fast-growing tree species for timber forest, shelter forest and surrounding greening.

Elm is salt tolerant, and the soil grows well when the salt content does not exceed 0.4%. It can be used as an excellent tree species for timber forest, farmland shelterbelt and surrounding greening.

Mulberry. Strong salt tolerance and water resistance, and can be planted on both sides of farmland shelterbelt.

Pear tree is one of the fruit tree varieties with cold tolerance, waterlogging tolerance and moderate salt tolerance. Lidu pear, as the rootstock of grafted pear tree, has stronger waterlogging tolerance. It can grow on soil with 0.6% salt content.

Apricot is one of the most salt-tolerant alkaline fruit trees.

Jujube trees are not strict with soil, and can be cultivated except swamp and saline-alkali land. It has strong adaptability to soil pH, and there is no strict requirement for the level of groundwater. Even when the water is 30 cm ~ 70 cm for 30 days, the growth has no obvious effect.

Paulownia is suitable for growing in sandy saline-alkali land and is mainly used as farmland shelter forest, but it is afraid of flooding and is not resistant to moisture.

Shrub tree species

Amorpha fruticosa grows rapidly and has strong adaptability. It can be used as a low-grade tree species in windbreak belt in saline-alkali sandy area and grows well when the soil salt content is 0.4%.

White wax strip. It can grow in low humidity soil with salt content of 0.2% ~ 0.5%. It can be used as a tree species for greening and cultivating ash trees around. Can survive and grow after being flooded for many days.

Tamarix chinensis Drought-resistant, barren, highly saline-alkali-resistant, wind-proof, sand-fixing, bank protection, all levels of saline-alkali land and barren saline-alkali land on both sides of the channel can be planted.

Willow. Deciduous shrub, with rapid growth, strong adaptability and mild salt tolerance, can fix sand and revetment. Suitable for planting in mild saline-alkali wetland, saline-alkali land on river beach, plain slope and sandy alkali wasteland.