1, growing habits
Cowpea is not sensitive to the length of sunshine, and only a few varieties have strict requirements on the length of sunshine, which is suitable for growing in the season with short sunshine. Cowpea is resistant to high temperature and freezing, and the optimum temperature for its growth and development is 20 ~ 25℃. Cowpea has strong drought resistance.
2. Planting time
Suitable varieties must be selected according to the climatic conditions of each season. Cowpea in early spring can be planted in greenhouses and other facilities from late March to early April, and can be directly broadcast with plastic film after mid-April, and can be directly broadcast in the open field from late April to early May. The sowing period of cowpea in spring and summer can generally last until mid-July, and cowpea in autumn can be sown from July to early August.
3. Water and fertilizer management
In the early stage, it is necessary to properly control water and squat seedlings to promote reproductive growth and form more inflorescences. In spring cultivation, fertilizer and water should be properly controlled in the early stage, and gradually increased after the first inflorescence bears pods to promote growth, with more flowers and pods. At the beginning of pod harvest, topdressing should be continued. Topdressing 1 time every 4-5 days, continuous topdressing for 3-4 times, 40-50 kg of common compound fertilizer or 0/000 kg of human manure/kloc-0 can be applied to each acre of hole, and then watering is carried out after fertilization.
4. Trimming and coring
When the main vine grows the first inflorescence, all the lateral branches below the inflorescence should be removed, and the lateral branches above the inflorescence should be cored, leaving two leaves at the base; When the main vine climbs over the scaffold, it is topped to promote the lower lateral branches to germinate flower buds.
Step 5 harvest
When picking cowpeas, be careful not to damage the rest of the buds, let alone pick the inflorescences together. Crops harvested by cowpea line should be harvested in time before the seeds swell.