How does temperature fluctuate?
Recently, there have been many problems with various types of vegetables in greenhouses. For example, there are severe yellowing of the leaves, slow expansion of tomatoes, or “skinning†on the fruit surface, and a large number of pepper malformations. The reason, I believe, is mainly because the weather is warm and cold, the temperature is fluctuating, and the root growth, nutrient absorption, and flower bud differentiation of vegetables are affected. According to meteorological experts, recently, the "cold spring" frequently. Therefore, it is necessary to strengthen the management of the shed to cope with the bad weather that may occur at any time. First, control the temperature, coordinate growth The importance of temperature to vegetables is that the physiological activities of the growth and development of vegetables must be carried out under certain temperature conditions. First of all, adjust the greenhouse temperature to the appropriate temperature for the growth of vegetables, at least to ensure that the greenhouse temperature is maintained within the range of the minimum temperature and maximum temperature that the vegetables can withstand, so that the vegetables can grow normally. Second, control the temperature difference between day and night. Appropriate temperature difference between day and night (10 °C ~ 15 °C) can not only prevent prosperous growth, promote plant growth and robustness, optimize flower bud differentiation, but also can effectively reduce the incidence of viral diseases. Finally, the different temperatures required for vegetables in different growth stages should be based on their biological characteristics of temperature control, such as cucumber seedlings during the anti-prosperous need to reduce the temperature, the results can be high temperature melon and so on. Second, a reasonable supply of water and fertilizer to promote root Zhuang Watering depends on the weather conditions. Avoid watering or watering on cloudy days and even days of cloudy days, resulting in a drop in ground temperature that causes the roots of vegetables to die, or causing the air humidity in the shed to increase, leading to the occurrence and spread of disease. You should choose to water on a sunny morning and have continuous sunny days after watering. Advocate gully ridges and ridges, can not be flooded with irrigation, watering alternately, small rows of watering twice, watering large rows once, alternate irrigation methods to prevent the lower ground temperature affect root growth and nutrient absorption. Pay attention to the application of biological bacterial fertilizer and total water-soluble rooting fertilizer. The biological bacterial fertilizer can improve the microbial ecological environment of the plant roots, effectively prevent the invasion of pathogenic bacteria, and greatly increase the disease resistance of plants. Full-water-soluble root-growing fertilizer can also stimulate the growth of roots of plants while supplementing a large number of nutrient elements, so as to achieve the purpose of rooting, rooting, and strengthening the roots, and prevent the occurrence of dead trees and rot. Third, increase lighting, increase production The spring is a period of frequent dusty weather. Once on the shed film, it is easy to cover sand and dust, and the transparency of the shed film is reduced. As a result, the shed temperature rises slowly, the photosynthetic accumulation of the leaves is reduced, and the transformation of eggplant fruit is affected. Therefore, it is recommended that vegetable farmers often wipe the shed film and increase the transparency of the shed film so that even in the event of a cloudy day, it can diffuse light, increase lighting in the shed, and promote high yields. Timely sparse old leaves can also increase the light, reduce the mutual shielding of the leaves, increase the photosynthetic area of ​​the leaves, and promote the accumulation of organic matter. At the same time, it can increase ventilation and light transmission in the shed and reduce the incidence of disease. Fourth, to prevent diseases earlier Reduce the air humidity in the shed and suppress the occurrence of diseases. Commonly used methods of dehumidification include warming and lowering humidity, releasing air and removing moisture, covering the film, and pouring water under the film. Reduce bacterial sources, timely removal of diseased leaves, diseased fruit, diseased branches, and intensive care outside the shed to reduce the bacterium source within the shed. At the same time with the prevention of spraying, inhibition of the occurrence and reproduction of germs, it is recommended that the whole shed spraying chlorothalonil blended streptomycin for agriculture, the effect is good. Convenient Disposable Underwear,Clean Disposable Underwear,Safty Portable Disposable Underwear,Ladies Underwear Breathable RFX+CARE Manufacturing Co.,Ltd. , https://www.rk-rfxcare.com