Characteristics and cultivation techniques of Robinia pseudoacacia

Robinia pseudoacacia, also known as Robinia pseudoacacia, German locust.

Robinia pseudoacacia branches and roots flammable, firepower, large heat, less smoke, long fire time, is a high-grade fuelwood, is a good tree species for the development of fuel forest. Robinia pseudoacacia leaves are very good fodder, whether fresh leaves or withered leaves, are favored by livestock. Robinia pseudoacacia is also a good nectar plant. The famous "locust nectar" is made by collecting locust nectar.

There are three forms of Robinia pseudoacacia cultivated in China: Robinia pseudoacacia (also known as Robinia pseudoacacia), Robinia pseudoacacia (also known as Robinia pseudoacacia, Robinia pseudoacacia, Robinia pseudoacacia) and Honghua Robinia pseudoacacia. Three fine varieties of Robinia pseudoacacia, Robinia pseudoacacia and Robinia pseudoacacia were selected for afforestation in Shandong and other places.

Robinia pseudoacacia is resistant to drought and barren, grows well on calcareous soil, and grows fastest in low hills, loess plateaus, river beaches, river embankments, canals and villages with good moist drainage. It often causes rotten roots and shoots and even death in places with stagnant water or high groundwater level.

Robinia pseudoacacia likes light and cannot bear shade. The sprouting ability and root tillering ability are very strong. Shallow-rooted tree species with well-developed lateral roots are prone to wind inversion and wind fracture in the tuyere.

Narrow terraces, horizontal steps, horizontal ditches, anti-slope terraces and fish-scale pits should be used for site preparation. When the bud just opened, the survival rate of afforestation was high, and the afforestation effect of cutting off stem was the best in autumn and winter, with high survival rate, fast growth and good dry shape. The cut-off height should not exceed 3cm, with few sprouts and exuberant growth. Planting should not be too deep, generally higher than the original soil mark 3~5cm.

The germination ability of the first lateral bud of Robinia pseudoacacia is weak, and the vigorous branch is often germinated from the second or third lateral bud, resulting in many branches and curved stem shape. Therefore, the planting density of Robinia pseudoacacia is slightly higher than that of other broad-leaved trees, in order to promote tree height growth, close early and cultivate excellent stem shape. Planting density should be flexibly controlled according to forest species, site conditions and fine degree of forest management. To build soil and water conservation forests and fuel forests, it is generally necessary to plant more than 5000 trees per hectare. The production practice shows that the mixed forest of Robinia pseudoacacia has large growth and few diseases and insect pests. The strip mixing is better, Robinia pseudoacacia has 2-6 rows, and other tree species have 4-6 rows. Mixed tree species are Platycladus orientalis, Pinus elliottii, poplar, Toona sinensis, Salix mandshurica, neem, elm, Amorpha and so on.

After planting, young forest tending should be carried out, mainly including loosening soil and weeding, expanding holes to cultivate soil, stepping on holes, clearing silt, wiping buds and pruning, interseedling and so on. According to reports, six times were nurtured in three years after planting, three times in the first year, two times in the second year, and once in the third year. Compared with the unnurtured young forest, the tree height growth and preservation rate increased by about 50%, and the DBH growth increased by nearly 80%. Sprouting is an important measure to cultivate excellent stem shape, especially in young forests. According to the survey, after cutting off the stem and wiping the bud at the right time, the tree with a sprouting strip is 50% taller and 55.6% larger than the tree without sprouting.