With the arrival of summer, the winter and spring stubble vegetables in the greenhouse have entered the late growth stage, and the over-summer stubble vegetables have entered the early planting period. How to formulate corresponding management measures? China Glass Greenhouse manufacturer: china glass greenhouse manufacturer to share with you:
(1) Strengthen fertilizer and water
After the beginning of summer, most of the stubble vegetables in winter and spring have entered the later stage of growth, and it is inevitable that the plants will decline. At this time, management should be strengthened to maximize the benefits. It can start strengthening management from two aspects of leaf maintenance and root protection, and spray the leaves with full nutrients every 7-10 days to supply the nutrients needed for vegetable growth in time. Fertilizer can not only be used for high nitrogen fertilizer, but can be applied by Fangrun, or by potassium sulfate compound fertilizer combined with compound microbial bacterial fertilizer, so as to achieve the purpose of strengthening roots and promoting fruit yield.
(2) Strictly prevent diseases and insects
As winter and spring stubble vegetables, pest control cannot be relaxed, because if allowed to develop, it will not only reduce the yield and effect of the stubble vegetables, but also increase the number of pathogens in china glass greenhouse for vegetables Stubble crop production. For example, tomato leaf mildew can be controlled by spraying with pesticides such as Garenone or Shigao, and it must be sprayed strictly; for example, bacterial diseases can be controlled by copper preparation or streptomycin. With the increase of temperature, virus diseases and insect pests have become an important obstacle for winter and spring stubble vegetables and over-summer vegetables, so they must be strictly controlled.
(3) Reasonable temperature control
For the winter warm greenhouse, when the minimum temperature is stable above 15 ℃, the grass curtain should be removed in time or no longer covered at night, so as to avoid excessive night temperature and excessive consumption of nutrients, resulting in poor flowering and fruit setting. As the temperature continues to rise, the head wind should increase the amount and time of ventilation. When the top wind is difficult to control the temperature increase in the shed, the vents at the front face are pulled apart, and appropriate sunshade and cooling measures are taken to ensure the normal growth of crops. For the arch shed, the following methods can be adopted according to the actual situation to achieve the purpose of regulating the shed environment, which is conducive to the growth of vegetables: First, the plastic film is still used for the top film, and the skirt film is removed. In this way, the top film is used to cover the rain, and the lower position is ventilated and permeable. Second, the plastic film is still used for the top film, and the skirt film is removed to cover the insect-proof net. In this way, the top film is used to cover the rain, which can isolate pests and prevent pests from harming the vegetables in the shed, but the ventilation and moisture permeability in the shed are poor, and high temperature or high humidity are prone to occur. The third is to remove the skirt film, keep the plastic top film, and cover the sunshade net. This method is often used for the production and seedling of over-summer vegetables.
(4) Cultivate strong trees
The temperature is high and the plant is prone to grow long. In addition to the management of the farming greenhouse environment, it is necessary to pay attention to the control of soil and watering to cultivate a strong root system. During planting, roots can be used to apply root anti-dead biological fungus fertilizer, 80-120 kg per mu, which can not only effectively inhibit the occurrence of root diseases, but also promote rooting and inhibit the growth, which is conducive to the cultivation of strong trees . After planting the delayed seedlings, control watering and timely plowing and hoeing to loosen the soil, enhance soil permeability, and promote root development.