Dingmiao
After sowing, seedlings usually begin to emerge from 7 to 10 days, and all emerge from 10 to 15 days. The mulching plot should be peeled off when the seedling grows 2 to 3 true leaves. When the seedling height is 15cm, the seedlings are thinned 2~3 times, the spacing between the fixed seedlings is 10~15cm, and the number of seedlings per mu is about 8000.
Transplant
It is used for greening seedlings. Generally, it takes 3~4 years to come out of the nursery. Because the top shoots of the seedlings have dense buds, the distance between them is short, and the trunk is very easy to bend. The trunk can be cut dry at 3~5cm from the ground. Because the locust tree has budding power, a large number of buds are prone to occur after the stem is cut. When the budding shoots grow to about 20cm, select a strong upright branch as the main trunk, and erase all the remaining branches. In the future, pay attention to removing the tillers at any time, temporarily retaining the weak side branches on the upper, middle, and lower parts of the main trunk, which is beneficial to prevent the main trunk from bending. In this way, the seedling height can reach more than 3m in the following year.
Fertilizer management
The number of watering should be determined according to factors such as climate conditions and soil texture. Under normal circumstances, water 2-3 water after emergence to before the rainy season, freeze water o一旦冻结幼儿园之前,我和泄水n time in case of waterlogging; before sowing, apply basal fertilizer (mainly organic fertilizer or ring fertilizer) 3000kg to the nursery field about, in early June, combined with watering, you can topdress fast-acting nitrogen fertilizer f (such as urea) 8~10kg per mu, and topdress urea from July to August (it is best to mix appropriate amount of compound fertilizer 12~3 times, and the amount of fertilizer is about 30kg each time. No watering and fertilization after September to promote the lignification of seedlings.
Plastic trimming
According to needs, it can be trimmed and trimmed into three tree shapes: natural open-hearted shape, cup-shaped shape, and natural-type hinged trunk shape. The natural open shape means that when the main stem grows to more than 3m, the stem is fixed, and 3 to 4 strong and well-angled branches are selected as the main branch, and the lateral branches and buds below the main branch are removed in time, and the main branch is short-cut in winter. ，Leave 50~60cm to promote the growth of secondary shoots to form a small crown; the cup-shaped shape means that after setting the stem, leave 3 large main branches like the natural happy shape, and choose 2 short side branches on each main branch during winter cutting Cut to form 6 small branches, topping in summer to control growth, and cut 2 short branches on each branch when cutting in the next winter to form a cup-shaped shape of "3 strands, 6 weights and 12 branches"; natural stem shape It means that after the main branch is left, only strong top buds and upright buds are retained for pruning in the future to develop strong branches at all levels and expand the crown.