The first crop of cowpea has a large amount of flowering, many pods, and large nutrient consumption, which is likely to affect the differentiation of the second crop and even premature senescence. If you want to increase the yield in the later period, the management of the pod-setting period is very critical. You can't patronize supplemental fertilizer to promote pod-setting, but also strengthen the root system maintenance, supplement the trace elements, and promote the subsequent flower bud differentiation. Use good biological agents to improve soil and promote roots

During the pod setting period of cowpea, many vegetable farmers look at the large number of pods and nutritional requirements. They pay attention to the supplementation of nitrogen, phosphorus, and potassium, but ignore the maintenance of the root system. During the pod-setting period, organic nutrients are consumed the most, and the amount of organic nutrients obtained by the root system is bound to be affected, which will easily lead to a decrease in new roots and subsequent weakness.

Master Zhang also attached great importance to this period. After many years of experiments, Master Zhang chose to use continuous biological agents. At present, there are many types of rooting agents on the market, some of which are expensive, but on the whole, these rooting agents are mostly "strengthening". At that time, rooting was promoted, and there was no nutrient support in the follow-up. . The use of biological agents starts from improving the soil, sustains and slowly promotes rooting, has no side effects, and has long-lasting effects. When choosing a biological agent, vegetable farmers can choose a pesticide registration number of Bacillus subtilis, Bacillus polymyxa, etc. You can also purchase strains and ferment in the shed, such as choosing the source of biological agent No. 1, with soybean meal, etc. After about half a month of fermentation, it can be used as a biological bacteria to fertilize, and the fertilizer can promote roots, and the effect is good. Early supplement of calcium and magnesium fertilizers

Cowpea blossoms and pods have a large nutritional demand, but nutrition is not just nitrogen, phosphorus, and potassium fertilizers, and medium and small factors are equally important. However, vegetable farmers often only pay attention to nitrogen, phosphorus, and potassium, and ignore medium and trace element fertilizers, which causes some physiological problems. . Such as calcium deficiency, it will lead to dysplasia of the grains, problems such as pointed tips, broken grains, etc .; When boron deficiency, the flowering is small, and it is difficult to sit in the pod ...

In the pod-setting stage, the role of trace elements is irreplaceable in order to promote flower bud differentiation. In the pod-setting stage, there are many stems and leaves, and spraying is difficult. Vegetable farmers should use watering as the basis and reasonably match top dressing. Based on the use of water-soluble fertilizers of nitrogen, phosphorus, and potassium, the acres can use 1 litre / mu of suspended calcium from Ishihara Taurus, 100 grams / mu of boron particles, 50 grams / mu of molybdenum fertilizer, 500 ml / mu of monosilicic acid, etc. Water can be applied. Strengthening environmental regulation

Nutrient consumption during the pod-setting period is high. Attention should be paid to environmental regulation to increase photosynthetic efficiency and inhibit respiratory consumption. The first is to add carbon dioxide. In spring, the light is good, the temperature is appropriate, and the lack of carbon dioxide is often the main factor affecting the photosynthetic efficiency. Pay attention to reasonable ventilation. Within 1 hour after the insulation is pulled up, ventilation must be started to supplement the carbon dioxide in the shed and improve photosynthetic efficiency. When cold air arrives, the greenhouse warming block can be ignited in the shed to replenish carbon dioxide while increasing the temperature. The second is to control the night temperature. As the temperature rises, the excessively high night temperature is also an important factor for increasing nutrition consumption. Pay attention to closing the vents at night and covering the quilts at night to ensure that the temperature in the shed is below 15 ° C in the morning. The third is spraying Bacillus subtilis, Trichoderma harzianum, chitosan, etc. to prevent disease and raise leaves, and improve disease resistance.

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