What are the breeding techniques of Robinia pseudoacacia?

Seeding, tillering, root cutting and other methods can be propagated. Mainly sowing and breeding.

Sowing and propagation: collect seeds on 10 ~ 20-year-old robust mother trees. After harvesting, drying in the sun, crushing and threshing, winnowing, drying and storing. There are about 46 thousand seeds per kilogram, and the germination rate can reach 89%. It is usually drilled in March-April. The seed coat is thick and hard, and there are as many hard seeds as 15% ~ 20%. Before sowing, put the seeds into a jar with a depth of about 1/3, then pour in hot water at 80℃ and stir for 1 ~ 2 minutes, then gradually add cold water, cool the water to 30 ~ 40℃, and take out the empty seeds floating on the water surface. You can also sow in the late rainy season. Sowing sites should be selected on fertile sandy loam with convenient irrigation and good drainage. In order to prevent the harm of damping-off disease, Robinia pseudoacacia should not be continuously cropped. The drilling line spacing is 50 ~ 60 cm, and the covering soil is about 1 cm. Before sowing, water should be poured on the soles of the feet or the sowing date should be properly advanced to make full use of soil moisture, so that the seedlings can not be watered before they are unearthed, so as to avoid soil hardening affecting the emergence. Seedlings grow rapidly, and should be thinned, loosened and weeded in time after emergence. Tillering and pruning should be carried out in time after seedling formation to promote the formation of trunk and crown. For those who are not growing well, the stubble can be leveled in winter and let it grow a new bud to cultivate a strong trunk.