Low-temperature oligo-shuttering vegetables management needs to be cautious
In recent days, the outside temperature has been low and the lighting conditions are not good, resulting in a low-temperature, high-humidity environment in the shed. When I went to the countryside, I encountered a number of vegetable farmers who said that recent vegetable growth has been weak and the disease has been outbreaks. Current vegetable farmers need to pay attention to the following five aspects of management to enhance plant growth and increase resistance.
Insulation not to forget the outside air temperature is low, and sometimes the lighting conditions are not good, in order to ensure the greenhouse temperature, many vegetable farmers are not willing to ventilate. However, the reporter believes that after the unveiling of the grass seedlings near the noon, to supplement the carbon dioxide within the shed, promote photosynthesis, discharge harmful gases accumulated in the shed, and ensure ventilation and ventilation under the premise of ensuring no cooling. The length of ventilation time can be determined by the temperature conditions in the booth.
Water control but not water shortage Whenever the temperature is reduced, vegetable farmers are afraid that after watering, there is a phenomenon of rooting, or after the watering, the humidity in the shed increases, causing more morbidity, and many dare not rush to water. The vegetables in the result period have more demand for fertilizer and water. It is suggested that the vegetable farmer should select the fine weather according to the soil moisture content to make up for the vegetables to make up for the moisture, and choose the way of under-irrigation or pouring of small water under the membrane.
Timely fertilization, but can not be excessive low temperature period, the root activity becomes worse, for flushing chemical fertilizers can easily lead to root and yellow leaves. At present, fertilizer should be mainly organic fertilizer or biofertilizer. However, the amount of fertilizer should not be excessive. Follow the principle of “eat less foodâ€. Usually topdressing organic fertilizer or biological fertilizer 15 ~ 20Kg/mu.
Leaf nutrition can not be forgotten in the low temperature period, weak root activity, foliar fertilizer is a good way to supplement the plant nutrition, prevent the lack of prime phenomenon. At present, the commonly used foliar fertilizer is full-nutrition type, such as the Green Fenwei series foliar fertilizer, Fangrun foliar fertilizer, diversified force and so on. When the plant lacks the phenomenon, it can be sprayed with the corresponding foliar fertilizer to alleviate it.
Spraying plant growth regulators to spray growth regulators such as alizarin lactones, love, and booster can regulate crop growth and enhance plant resistance to disease and stress. Weakly growing plants can be sprayed with 1,500 times more alizarin lactone or 6,000 times more love. Plants with prosperous growth can be sprayed with 750-1500 times of 25% mefenazine.
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