(2) Do not water before watering and chasing the seedlings of Robinia pseudoacacia to avoid the formation of topsoil and cause uneven seedlings. After emergence, water should be properly and timely, and keep the soil moist. The Kuandian area can be watered 3-5 times a year. Watering should be appropriate, hedgehogs afraid of flooding, timely drainage in the rainy season, to prevent root rot of seedlings.
Fertilizers were applied once during the seedling stage and were carried out in the middle and early July. Applying 15-2Okg of ammonium sulfate per 667m2, watering once after fertilization, and stopping fertilizer and watering at the end of July to prevent seedlings from becoming long and affecting the lignification of seedlings.
(3) Loose soil weeding and weeding shall keep soil loose and free of weeds. In the first half of growing seedlings, weeding is performed every half month or so. In the second half of the seedling growth period, weeding is performed every 30 days, usually after watering and after raining.
(4) Pest and disease control Robinia pseudoacacia is susceptible to seedling blight during seedling stage. When the seedlings are out of alignment, 0.5%-1% equivalent Bordeaux mixture is sprayed once every 15 days or 1%-2% ferrous sulfate solution is sprayed for prevention and treatment. From June to July, aphids were harmful and could be sprayed with a solution of 40% dimethoate in 0.05% solution.
(5) Cutting seedlings and seedlings The seedlings of Robinia pseudoacacia grow fast and have dense foliage. They require high light and ventilation conditions, and the seedlings are severely differentiated. The rapid growth and development of seedlings suppress the growth of surrounding seedlings. Therefore, adopting cutting-and-tearing method to suppress large seedlings and assisting the growth of seedlings to achieve balanced growth and development and achieve high-quality and high-yield purposes. Tedling and leaf cutting are carried out during the summer when seedlings thrive and flourish, generally starting from a seedling height of 60-7Ocm, and then once every 20 days and ending in mid-August. To cut the leaves from both sides of the ridge, the large seedlings cut more, the medium seedlings cut less, and the seedlings did not cut. After cutting, the seedling height is not shorter than 5Ocm. If the seedlings are not dense enough, the seedlings are not severely differentiated and they may not be beaten.
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