Black bean, commonly known as Baogong bean, also known as Luzhou big black bean, with the trade name of Wupiren green bean, is a limited pod-setting habit. The plant height is 65 ~ 90 cm, and the main stem has 166 ~ 18 nodes with 2 ~ 4 branches. Compact plant type, strong main stem; The leaves are oval, the seed coat is black, the cotyledons are green, the hilum is light gray, and the weight of 100 seeds is 38 ~ 43g. Mid-late maturity varieties, the whole growth period is about 120 days. Drought resistance, waterlogging resistance, strong fertilizer resistance, lodging resistance and antiviral disease. The content of protein is about 40%. The yield per mu150 ~ 250kg.

1. Seed treatment

Sowing with iron sieve, selecting 100 seeds weighing more than 40g, and drying for 2-3 days.

Step 2 sow at the right time

It is required to combine direct seeding with seedling transplanting. Before sowing, the seeds should be dried strictly to improve the germination potential and germination rate. The normal year of live broadcast is the first half of June. Generally, artificial sowing is adopted, and the seeds are covered with gray fertilizer. The best time for transplanting seedlings is from late May to early June, and the seedling age is 10 ~ 15 days. Seedlings should be transplanted by tidying the seedbed, using artificial sowing and transplanting with soil in time.

3. Reasonable close planting

Black beans are luxuriant in branches and leaves, suitable for sparse planting, fertile field or early planting field, with row spacing of 50 cm× 20 cm, per hole 1 plant and yield of 6000 plants per mu; Thin field or late field, row spacing of 50 cm× 30 cm, 2 plants per hole, 8000 plants per mu.

4. Scientific fertilization

30 ~ 50 loads of soil miscellaneous fertilizer and 30 kg of ternary compound fertilizer are applied to each mu of base fertilizer; Or ammonium bicarbonate mixed with calcium superphosphate (ratio 1: 1) 60kg. See the flower topdressing, urea 10 kg per mu. Spraying potassium dihydrogen phosphate 1 ~ 3 times outside the roots at pod-setting stage, with a concentration of 0.2%.

Step 5 control pests

The double pesticides produced by Hefei Watermelon Research Institute are effective in controlling budding insects at seedling stage and stem borers at flowering stage. During the flowering and pod-setting period, we should focus on the control of black miner, Spodoptera litura and soybean leaf roller. The control of bean stalk black miner can be carried out with methamidophos or phoxim EC (60ml per mu) and pyrethroids, and two barrels of water can be controlled with Ke Ling 70ml or phoxim EC 60ml per mu.

Timely harvest

When the pods become Huang Shi, harvest them with clear water in time, then pile them up for 5-7 days before threshing. Avoid sun exposure after threshing, so as not to crack the seed coat and affect the appearance quality.