Before the cultivation of black bean seedlings, the seeds should be winnowed and Shui Piao, and the seeds damaged by mechanical crushing, moth-eaten, mildewed and too small should be eliminated. When Shui Piao is used, it should be rubbed gently and repeatedly, and impurities and bad beans should be skimmed off repeatedly, and then the black beans should be fished out and put into a bamboo sieve to control the moisture.
Planting conditions of black bean seedlings
1, humidity condition
Black bean seedlings need more water for planting, the least water for growing period, the most water for flowering and pod setting period, and the water for pod setting period is somewhere in between.
2. Temperature situation
The planting temperature of black bean seedlings is very important. Black beans like temperature, the germination should be above 18, but not above 25, and the seedlings grow rapidly between 20 and 24.
Planting steps of black bean seedlings
1, soil preparation and fertilization
When planting black bean seedlings, it is best to use agricultural machinery to deeply plough the selected paddy fields once to remove the roots, weeds and other impurities left in the soil by the previous crops. Then apply 800 kg of organic fertilizer, 200 kg of urea and 70 kg of calcium magnesium phosphorus compound fertilizer per mu, turn over the soil again and turn the fertilizer into the ground.
2. Sowing time
Black bean seedlings can be planted when the underground temperature rises to about 10 degrees in spring. Before sowing, seeds are wrapped with seed coating agent to improve the immunity of seedlings after emergence.
3. Sowing method
When sowing, press the ridge board first, then dig a hole at the distance of 15 cm -20 cm for sowing, and sow 3-4 black bean seedlings in each hole. After sowing, cover with fine soil with a thickness of 3 cm -4 cm, lightly press with wooden boards, and then water 1 time.
Key points of high-yield management of black bean seedlings
1, irrigation and drainage management
If you want high yield of black bean seedlings, you should give them enough water when they enter the pod-setting stage, especially during the continuous drought. If you don't water it in time, it's easy to drop fruit.
2. Topdressing management
When black bean seedlings just entered the flowering stage, 10 kg -20 kg urea should be applied per mu to promote the growth of black beans. After entering the full flowering period, topdressing 80kg-90kg urea per mu of field to increase the number of pods.
3, intertillage weeding
1 Carry out shallow tillage when the compound leaves of black bean seedlings just come out, and at the same time, pull out all weeds in the field. When the black bean seedlings grow to 20 cm high, 1 time intertillage weeding can increase the yield of black beans at harvest.