CATDOLL : CATDOLL: Big black bean planting technology

Black beans, commonly known as Baogong beans, also known as Luzhou big black beans, and the commercial name is black-skinned green beans, are limited pod-bearing habits. The plant height is 65-90 cm, the main stem has 166-18 nodes, and there are 2-4 branches. The plant is compact and the main stem is thick; the leaves are oval, the seed coat is black, the cotyledons are green, the hilum is light gray, and the weight of 100 grains is 38-43 grams. It is a medium-late maturing variety with a full growth period of about 120 days. It is drought-resistant, waterlogged-resistant, and fertilizer-resistant, and resistant to lodging and relatively resistant to viral diseases. The protein content is about 40%. The yield per mu is 150-250 kg.

1. Seed treatment: Use iron sieve to sieve seeds, select seeds with a weight of more than 40 grams per 100 seeds, and sun-dry them for 2 to 3 days. 2. The appropriate sowing period requires the combination of direct seeding and seedling raising and transplanting. Strictly sun-dry seeds before sowing to improve the germination potential and germination rate of seeds. The appropriate period for direct seeding is early to mid-June in normal years. Generally, manual sowing is adopted, and seeds are covered with ash manure; the best time for seedling raising and transplanting is from late May to early June, and the seedling age is 10 to 15 days. The seedling bed should be finely prepared for seedling raising and transplanting, and manual sowing is adopted, and soil is transplanted in time. 3. Reasonable dense planting: Black beans have lush branches and leaves, which are suitable for sparse planting, fertile fields or early planting plots. The row spacing is 50 cm × 20 cm, 1 plant per hole, and 6,000 plants per mu; for thin fields or late planting plots, the row spacing is 50 cm × 30 cm, 2 plants per hole, and 8,000 plants per mu. 4. Scientific fertilization: 30-50 dan of soil and miscellaneous fertilizers per mu plus 30 kg of triple compound fertilizer; or 60 kg of ammonium bicarbonate mixed with superphosphate (ratio 1:1). Topdressing: 10 kg of urea per mu. During the pod-setting period, spray potassium dihydrogen phosphate on the roots 1-3 times with a concentration of 0.2%. 5. Control of insect pests: budworms should be controlled during the seedling stage, and bean pod borers should be controlled during the flowering period. It is better to use the double-throw pesticide produced by Hefei Watermelon Research Institute; during the flowering and pod stage, the focus should be on controlling bean stem black miners, lophophate moth and soybean leaf roller. To control bean stem black miners, methyl parathion or phoxim emulsifiable concentrate (60 ml per mu) plus pyrethroids can be used for control, lophophate moth and soybean leaf roller can be controlled by 70 ml of cypermethrin or 60 ml of phoxim emulsifiable concentrate with 2 buckets of water. 6. Harvest the pods when they turn yellow. Harvest with water in time, then pile them for 5 to 7 days before threshing. Avoid exposure to the sun after threshing to prevent the seed coat from cracking and affecting the appearance quality.