Three points of greenhouse cultivation

I. Timely cultivation of green beans in greenhouses and cowpeas in open fields have different environmental conditions. Due to the higher temperature in the greenhouse, the growth rate is faster, and the occurrence of plant-type shoots tends to be less. In order to increase the output of greenhouse cowpeas, a sharp approach can be adopted to regulate the rational distribution of the upper and lower branches of cowpeas. It has been observed that after the formation of the third group of leaves from the third group of pods, the pods are significantly elongated and the growth rate of the vines is accelerated. Based on this point, the timing of timing is determined. After the appearance of the third group of leaves, the tip of the axillae can control the main vine's leggy and promote the germination of the lower lateral branch. On the contrary, if the node at the tip of the tadpole is too high, the main vines will not be able to grow vigorously and the collaterals will germinate slowly. But to the top of the 20 cm height of the greenhouse when the tip of a timely manner to prevent the upper branches and leaves flourishing affect the light. Second, to prevent falling flowers, falling flowers and falling leaves is a big problem in greenhouse cultivation, comprehensive analysis of two factors. The first is the nutritional factor. The flower bud differentiation of cowpea is relatively early, and the plant enters the vegetative and reproductive growth stage earlier. Therefore, the flowering stage often falls from the competition between vegetative growth and reproductive growth. Many of us have not noticed It has already fallen off, especially during the flowering period. The second is the climatic factors, mostly because high temperatures cause adverse flower growth and hinder pollination and fertilization. When the temperature in the shed reaches 28°C, it begins to fall, and the falling flower above 30°C will be more serious. Therefore, it is necessary to gradually increase ventilation during March-April. In addition, during the flowering period of cowpea, it is necessary to maintain relative air humidity in the shed. If the greenhouse is hot and dry, the style drying will also affect the extension of the pollen tube. The relative humidity in the shed should be maintained at about 70%. Appropriate environmental conditions are essential to prevent the pods from falling. Third, prevention and treatment of cowpea root rot bean root rot and other vegetables root rot the same, belong to soil-borne diseases. The occurrence of cowpea root rot disease has the following ways: one is the residue of pathogenic bacteria caused by continuous cropping of the same species; the other is mechanical damage, which mainly refers to a part of root fractures caused by microbes in artificial cultivation and management; Shortly after unearthing, suddenly the soil temperature was extremely low and the red roots of the seedlings developed. These conditions may cause the infection of root rot bacteria. Control methods: 1 Implement a 2-year rotation system. 2 To plant seedlings when the ground temperature is stable at 12°C. 3 Chemical control The roots can be watered 3,000 times with "Yashimeiling" or 1000 times with "yellow fulvic acid," and the effect can be better once before the three leaves and during the early flowering period.