First, adjust the film, a reasonable temperature control. For the winter greenhouses, when the minimum temperature is stable above 15°C, the straw curtains should be promptly removed or covered at night so as to avoid excessive nighttime temperatures and excessive consumption of nutrients resulting in poor flowering and fruit setting. As the temperature continues to increase, the top wind should increase ventilation and ventilation time. When the top wind is difficult to control the increase in temperature inside the shed, the vents at the front face are opened again, and appropriate measures for reducing the temperature of the shade are taken to ensure the normal growth of the crop. For sheds, according to the actual situation, the following methods can be adopted to control the environment of the sheds, which is conducive to the purpose of vegetable growth: First, the plastic film is still used to remove the top film. In this way, the top film covers the rain, and the lower part is ventilated and breathable. The second is that the top film still uses plastic film to remove the skirt film cover insect net. In this way, the roof membrane is used to shield the rain, which can insulate the insects and prevent the insects from damaging the vegetables in the shed. However, the degree of ventilation and moisture permeability in the shed is poor, and high temperature or high humidity conditions easily occur. The third is to go to the skirt film, retaining the plastic top film on the basis of the cover shade net. This method is commonly used for the production and breeding of summer vegetables. Second, strengthen the fertilizer and water, improve the late spring and autumn vegetables benefit. Since the beginning of summer, many vegetables in winter and spring have entered the late growth period, and inevitably there will be plant decline. At this time, management should be strengthened to maximize the benefits. It is possible to carry out intensive management from the aspects of raising leaves and cultivating roots, spraying a once-full-nutrition leaf fertilizer every 7-10 days, such as Fang Run (20:20:20), and providing nutrients for vegetable growth in time. . The leaching can not only be used to flush out high-nitrogen fertilizers, but can be used for flushing with aromatics (20:10:30). It is also possible to use potassium sulphate compound fertilizer with complex microbial fertilizers for flushing, in order to achieve strong root-promoting fruit and increase yield. purpose. Third, the more summer vegetables, root control and cultivation of strong trees. The temperature is high and the plants are easy to grow. In addition to controlling the environment of the sheds, management should also pay attention to the control of soil and watering to cultivate a strong root system. When planting, the roots can be used to produce bio-fungus-resistant biological fungus, 80-120 kilograms of mu, not only can effectively inhibit the occurrence of root diseases, but also can play a role in promoting rooting, inhibiting prosperous, conducive to the cultivation of strong trees . After planting the seedlings, control the watering, and timely plough the soil, loosen the soil, enhance the permeability of the soil, and promote the development of the root system. After the plants have grown into prolonged growth, they can be adjusted by using 750-fold booster or 1500-times inhibitors. Fourth, prevent pests, especially viral diseases and pests. As winter and spring vegetables, pest control cannot relax, because if it is allowed to develop, it will not only reduce the yield and the effect of the vegetable, but also increase the number of pathogenic bacteria in the greenhouse, which is not conducive to the production of the next crop. For example, Tomato leaf mold can be controlled by Garinong or Shibuya Chemical Co., Ltd., and it must be sprayed thoroughly; if it is a bacterial disease, copper preparations or streptomycin can be used for spray control. As the temperature rises, viral diseases and insect pests become more and more important obstacles for winter and spring vegetables and summer vegetables, so they must be strictly controlled. Such as maggots, whitefly, etc. can be used acetamiprid mixed buprofezin spray control, but also irrigation root control; and if the virus can be used Ningnanmycin or virus A plus zinc containing foliar spray control. Tetrandrine Herb,Tetrandra Extract Powder,Cas 518-34-3,Tetrandrine 98% Shaanxi The River Pharmaceutical Co., Ltd. , https://www.dahepharma.com
With the advent of summer, winter and spring vegetables have entered the late growth stage, and the summer vegetables have entered the initial stage of planting. How to formulate appropriate management measures based on temperature changes? Experts believe that the following four points should be grasped: