First, a reasonable close planting
Overwintering cowpeas are under low temperature and low light conditions during the growing season, and photosynthesis is hindered. The nutrition of the plants themselves is limited. Therefore, they must not be too dense during colonization in order to prevent the leaves from blocking each other. Generally take 70 cm, 50 cm size colonization, hole spacing 27 to 30 cm, 2 to 3 plants per hole, watering after planting, planing after covering the mulch.
Second, field management
In winter, it is better to cover the insulation, strengthen the lighting, and often wipe the shed film so that the light transmission is good. It is better to hang the light curtain in the shed.
In fertilizer and water management, water should be kept to a minimum, and 15 kg of ammonium sulphate should be applied for each acre before the racks of beans are inserted into the shelf and before the beans are blooming. During the clams, fertilizer is topdressed once every 10 to 15 days, each time 15 to 20 kg of ammonium sulfate is applied. Conditional, after the flowering sunny day, 8 to 10 am every morning, top-dressing carbon dioxide gas fertilizer, appropriate ventilation after 2 hours. During the late growth period, the cowpea plants are senescent and the roots are aged. To prolong the scarring, 0.2% potassium dihydrogen phosphate can be used for foliar fertilization.
After the pods are spread, the pods will be caught and hauled in time. Afterwards, the pods will be napped and wiped in time to prevent the leaves from blocking each other. When the plant height is 2 to 2.5 meters, the hearts will be picked in time to promote scab. Pay attention to knock down the old leaves after each harvest. The height of the main branch of dwarf kidney bean is 30 centimeters when picking the heart, which can promote its early drawing of the lateral branch, which is conducive to the growth of soybean meal and increase the rate of flowering and scarring.
Third, timely harvest, pest control
Kidney beans must be harvested in time to prevent premature senescence, which can usually be harvested 13 to 16 days after flowering. The cultivation of kidney beans in greenhouses is due to poor ventilation and prone to rust. If the humidity in the booth is too high, select small winds at noon on sunny days to reduce the humidity.
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