What are the varieties of soybean green manure? Tainan 4 Soybean and Tainan 7 Soybean

Soybean is often seen in our life, this agricultural product is used for many of our agricultural and sideline products, so this product is a very valuable crop! Here are two soybean varieties. This is different from lentils, but the planting method is the same as that of lentils!

Green manure soybean

There are many varieties of soybean for green manure, including soybeans, green beans, black beans, etc., which are warm and humid and suitable for cultivation in various parts of the province. Zi Shi has great nutritional food value, root nodule bacteria have nitrogen fixation effect and high nitrogen content in stems and leaves. It is an important and excellent green manure crop in China. The amount of sowing per hectare depends on the size of the seeds, 30-50 kg for small seeds (100-seed weight less than 12 g), 50-60 kg for medium-grain species (12-18 g for 100-seed weight), and more than 60 kg for large-grain species (100 seeds greater than 20 g). The burial period of soybean for green manure is more appropriate after 80 to 100 days after sowing (about pod ripening stage), when the amount of biomass grass is higher and the fertilizer efficiency is good. If buried too early, the yield of biomass grass is low and the fertilizer efficiency is poor. At present, the popularized varieties are Tainan 4 and Tainan 7.

1. Tainan No. 4

It was bred in 1999 and selected by local species of green pea. The seeds are yellowish green, navel brown, the weight of 100 seeds is 610g, and the sowing amount of small seeds per hectare is only 30kg / ha, which is half less than that of ordinary soybean seeds, which can reduce the cost of green manure cultivation. The plant type is erect, the plant height is 60 cm to 108 cm, and the lowest pod position is more than 10 cm 12 cm above the ground, so the seeds can be collected mechanically. The flower is purple, the sowing time is from February to August, and it has great adaptability to the cultivation environment. The field can be completely covered 50-60 days after sowing, and the field mulching time is 120-150 days. The fresh grass for 80 days is 20 000 ~ 37 000 kg, and the nitrogen content of the plant is 113 ~ 251 kg, which is suitable for the first and second stage green manure cultivation and seed propagation in Tainan County. At present, Tainan No. 4 covers an area of more than 25000 hectares every year. This variety adapts to the hot and humid environment in spring and summer, and the plant does not have the problem of Lignification. After planting, it is easy to apply it mechanically during any period.

two。 Tainan 7

It was bred in 2002 and selected by local varieties of green manure soybean. The seed is brown, the weight of 100 seeds is 7 ~ 9 grams, the sowing amount per hectare is 35 kg, the plant type is erect at the initial stage, creeping at the later stage, the length of the main stem is 325 ~ 372 cm, the flower is purple, the sowing date is from February to October, the number of growth days is 175 ~ 210 days, the amount of fresh grass for 80 days is 20000 ~ 45000 kg, and the nitrogen content of plant is 950.211 kg. Tainan 7 is suitable for the cultivation of green manure in flood and dry fields in various regions of Taiwan, with strong initial growth potential, high amount of fresh grass, moisture and drought tolerance, better weed inhibition than other green manure soybean varieties, and complete field coverage during long growth period. it can be used for the cultivation and popularization of green manure in two periods of fallow field, and it is also resistant to diseases and insect pests and cold. When planted in early November and growing for 90 days, the yield of fresh grass per hectare reaches 24700 kg, which is not inferior to that of other winter green manure crops. Therefore, it can also be used as winter green manure.