Rainy seasons management

After entering the summer, the recent precipitation has increased significantly. From the weather forecast for the next week, there is still rainfall. What problems should be paid attention to during the rainy season? The reporter believes that the following three points should be noticed: First, pay attention to the weather forecast, close the vents before the rain, and prevent rainwater from entering the shed. After rainwater enters the shed, it will not only easily lead to the occurrence of diseases, but will also lead to soil salinization. In addition, rainwater entering the shed will also cause rooting and affect the ability of roots to absorb water and nutrients. If rainwater enters the shed, rainwater should be drained in time to keep the soil moist. In the case of unpatched mulching, it can be appropriate to increase the permeability of the soil and create suitable environmental conditions for the root system. Second, reduce the humidity in the shelter to prevent the occurrence of diseases. Summer temperatures are relatively high. During the rainy season, the humidity in the shed is relatively high. Under high-temperature and high-humidity conditions, it is easy to induce the occurrence of diseases such as cucumber brown spots and early blight of tomatoes. To prevent the occurrence of diseases, the rainy season Must pay attention to reduce the humidity within the shed, mainly from the following three aspects: First, to strengthen ventilation, the rain after the wind stopped to pull open vent ventilation, short-term ventilation and dehumidification. Second, it is forbidden to water before rain and rain so as not to increase the humidity in the shed. Thirdly, when it is urgent to spray and prevent disease during the rainy season, spraying should be avoided as much as possible, and dusting and smoking can be used. Again, in the case of a long period of haze, it is necessary to prevent vegetables from wilting. After the continuous rainy days in summer, the vegetable tissue is younger, and suddenly it encounters fine weather. If the light is too strong, it will not only burn the leaves, but it will easily cause wilting under high temperature and strong light. In order to prevent the wilting of plants, the following two points should be done: First, slowly release the wind. After a long period of haze and haze, if the air is suddenly released, the humidity in the greenhouse is reduced, and the transpiration of the leaf is increased. The root system cannot supply water in time and it is easy to cause wilting. Can slowly release air, gradually increase ventilation. Second, set up shade nets in time. In order to prevent the plants from being exposed to strong light, shade nets can be set in time under strong light at noon to prevent high temperature hazards. If the plants have slight wilting and dry leaves, timely spraying of water can effectively relieve the symptoms; when serious, 2000 times of aspirin can be added to the water to reduce the transpiration of the plants and help the plants to resume normal growth.

Microscope

Binocular Biological Microscope,Biological Microscope For Lab,High Precision Biological Microscope,Biological Microscope

Unimedsume Trading Co., Ltd , https://www.ums-labmed.com