In summer, when the temperature is high, cowpea sprouts and grows fast, and cowpea flour can reach the vine-throwing situation in about 15 days. At this time, it is necessary to control the application of chemical fertilizer and avoid diseases. Before the cowpea seedlings are thrown off, bamboo poles should be used to make a herringbone frame to facilitate the cowpea climbing frame. Before cowpea grows full, it is necessary to manipulate the management method of fertilizer and water, especially not to apply base fertilizer, and pay attention to prevent diseases. When the relative height of cowpea plants exceeds the iron frame, they should be topped immediately.
When the cowpea vine grows to 20 ~ 35 cm, it should be hedged in time, and the height of the fence should be better than 2.5. Immediately after erection, vines should be drawn, which should be carried out in the afternoon on sunny days, not in wet dew or rainy days to prevent breakage. The method of cutting technique is: all the lateral buds below the first inflorescence of the main vine are cut off, and all the weak terminal buds above the first inflorescence need to be cut off, so as to promote the growth and development of buds at the same node. All branches should be topped as soon as possible, leaving only1~ 3 nodes to produce inflorescences. When the main vine grows to the top of the frame, it should be topped and cored to promote the production of buds between the axils of each leaf, and the nutrients should be concentrated to produce more pods, which is also conducive to the future harvest of pods.
First of all, we should choose the species with good quality. When planting, we usually choose the playing method. We should open holes according to the plant spacing of 40×50cm, put 2 seeds in each hole, and cover the soil with 1-2 cm after planting. After filling the soil, pour enough water, and then cover it with plastic film for heat insulation, moisture preservation and water replenishment, which is convenient for seedling emergence. However, in summer, it is necessary to pay attention to the fact that plastic film mulching is not suitable for seed germination in case of unsuccessful seed germination caused by continuous high temperature under the film. Water frequently to maintain soil moisture and facilitate seedling emergence.
Cowpea itself is poor-tolerant, so the requirements for soil are not high, and ordinary soil can be planted. However, in order to better yield and quality, soil with flat terrain, abundant sunshine, excellent drainage pipes and good air permeability should be selected. In order to better promote the growth and development of cowpea, ploughing should be done before planting to loosen the soil, which is beneficial to the growth and development of cowpea. If the soil fertilizer efficiency is not enough, base fertilizer can be applied to make up the fertilizer efficiency, and generally, 2000KG of organic manure is applied per acre/kloc-0.