Propagation methods of Sophora japonica

The locust tree, also known as Sophora japonica, Fructus Sophorae, Sophora pseudoacacia, Sophora pseudoacacia, etc., is a leguminous tree native to China, and now it is widely cultivated in north and south provinces, especially in North China and the Loess Plateau. It is light-loving and shade-tolerant, and can adapt to a colder climate. Its roots are deep and developed, and it has a very high planting value. Let's take a look at the breeding methods of locust trees.

Root-burying propagation of Sophora japonica

1. Seed preparation: the root of Robinia pseudoacacia can be introduced after defoliation, and it can be buried and preserved in sandy soil before planting, so as to control the humidity of sandy soil, so that the root segment should not be dehydrated and withered, and the humidity should not be too heavy and moldy and rotten.

2. Soil preparation: the sandy loam soil with deep soil layer, flat terrain, convenient irrigation and drainage and no infection source of diseases and insect pests is the best for seedling breeding. 2500 kg of livestock and poultry manure or 50 kg of phosphate fertilizer and diammonium fertilizer were applied every 667m2, and insecticides such as carbofuran were used to kill underground pests. The ground should be turned over deeply, refined and raked flat, and the width of the bed should be about 1 meter.

3. Seedling raising: the seedling time is the first and middle of March in the south and the last ten days of March to the first ten days of April in the north. The smooth root segment with a diameter of 5 mm and no signs of diseases and insect pests of 1 ~ 2 years old was selected and cut into 5 cm long and 7 cm long. Open the ditch along the border, the ditch distance is 50 cm, the depth is 5 cm, and then put the root segment in the ditch with a plant distance of 30 cm, cover the fine sandy soil, pour through the fixed root water, cover the plastic film, and the seedlings can emerge in about a month.

Cutting propagation of Sophora japonica

The main results are as follows: 1. Cutting time: cutting time is the same as root-burying seedling, or earlier.

2. Cuttings selection: select woody branches with a diameter of 8mm and 20mm, cut into cuttings 15cm long, the upper incision is cut flat, 1cm away from the bud package, the lower incision is cut into an oblique mouth of 45 degrees, 5mm away from the bud package, and 50 roots are divided into a bundle of upper and lower ends. Soak the lower end with 50 mg / kg rooting powder solution for 3 hours, then remove and set aside.

3. Cutting method: the soil preparation requirements are the same as before, according to the plant spacing of 20 cm × 40 cm, the branches are inserted into the soil at an inclination angle of 45 degrees, and the plastic film is covered along the border.

Seed propagation of Sophora japonica

The main results are as follows: 1. seedling site selection: the seedling land of Robinia pseudoacacia should choose loam or sandy loam with flat terrain, good drainage and irrigation conditions, fertile soil and deep soil layer. It can adapt to neutral, calcareous and slightly acidic soil, and the electric energy grows normally on mild saline-alkali soil (salt content is about 0.15%), but the growth of dry, barren and low-lying waterlogged nursery is poor.

2. Seed treatment

① soaking method: soak the seeds in 80 ℃ water, stir continuously until the water temperature drops below 45 ℃, place for 24 hours, take out the swollen seeds. The unswollen seeds were repeated for 2 or 3 times to make them expand. Cover the inflated seeds with a wet cloth or grass curtain to sprout. After 1.5 to 2 days, about 20% of the seeds can be germinated.

② sand storage method: the seeds are generally stored 10-15 days before sowing. Before storing the sand, soak the seeds in water for 24 hours so that the water content of the sand reaches 60%, that is, it is held in a ball and is about to be dispersed. Mix the seed sand at a volume ratio of 1:3, put it into a hole dug in advance, and then cover it with plastic sheeting. During sand storage, turn it once a day and keep it moist. 50% of the seeds can be sown when they germinate.

3. Sowing method: the sowing time is generally spring sowing, and Zhuozhou is generally suitable for sowing in the first and middle of April. The sowing rate is 10kg to 12kg per mu. Ridge sowing or two ways can be used. When sowing ridges, the distance between ridges is 70 cm 80 cm, the width at the bottom of the ridge is 40 cm 50 cm, the width of the ridge is about 30 cm, the height is 15 cm 20 cm, the sowing width is 10 cm, and the cover is 1.5 cm 2 cm. It can also be made without ridging, with a row spacing of 60 to 70 centimeters and a sowing width of 5 centimeters. Suppressed after sowing, so that the seeds are closely combined with the soil, and can be covered with film when conditions are available.