What fertilizer should be applied to Lagerstroemia indica seedlings planted for one year?

Now the water and fertilizer management technology of Lagerstroemia indica seedlings in Jiangxi Green Agriculture Development Co., Ltd. is introduced as follows:

Always keep the soil moist throughout the growing season, and water it 1 time in spring drought; It is not advisable to water too much in autumn flowering period, generally 15 days or so 1 time; Pour enough antifreeze in winter.

Lagerstroemia indica fertilization is generally in winter or early spring; Each plant can be applied with decomposed human manure 10 ~ 15 kg or organic fertilizer 2 ~ 4 kg, and a small amount of inorganic fertilizer can be applied from May to June. In the seedling growing season, nitrogen fertilizer and compound fertilizer should be applied to promote seedling growth. In the first three years after planting, 65,438+00 ~ 65,438+05 kg (mainly organic fertilizers such as compost and cake fertilizer) should be applied to the roots every winter or spring before germination, and some compound fertilizers can also be applied as appropriate.

The surviving Lagerstroemia indica is watered 1 time every spring, 3 ~ 4 times later and 1 ~ 2 times in flowering period. Water frozen water once before freezing in North China, and pay attention to drainage after rain.