How many locust tree saplings are planted at intervals? How many trees are planted on an acre of land?

1. Seedbed treatment: select nursery land, apply sufficient base fertilizer and cover with plastic film. Choose loam with deep soil layer, fertile soil and good irrigation and drainage conditions as nursery land, water it before soil preparation in early spring, apply 2,500 kilograms of high-quality base fertilizer and 50 kilograms of compound fertilizer per mu, rake it flat, spray acetochlor herbicide and cover it with 90 cm wide plastic film for sowing.

2. Seedling raising: Soak the seeds with water at 80℃ in early March, naturally cool for 24 hours, and take out the expanded seeds. Soak unexpanded seeds in water at 90℃- 100℃. The treatment method is the same as above. Generally, after three or four times of treatment, most of the seeds can expand at a temperature of about 65438 00℃ each time, and the expanded seeds can be harvested and planted in stages. The plastic film structure is adopted, the structural depth is 2-3 cm, and the plant spacing is 20 cm. Each film is planted in two rows with a spacing of about 50 cm. Put the swollen seeds into the holes, two seeds in each hole, and cover the soil with a thickness of 2cm. Cover with plastic film, keep warm and moisturize, and sprout quickly and neatly.

3. Seedling management: From April to May, when the height of the seedlings is 5 cm-8 cm, 65,438+00 cm-65,438+05 cm (with 6-65,438+00 pinnate leaves), cut off the straight roots with a root-cutting shovel, and the root-cutting depth is 65,438+02 cm-66 from the ground. Water in drought, drain water in rainy season, apply quick-acting chemical fertilizer twice in June-August, and plough and weed in time.