Many of the recent abnormalities in vegetables are caused by daily management not keeping up with weather changes. According to the weather conditions, the environmental changes of the shed mainly showed that the night temperature decreased significantly, the temperature difference between day and night increased significantly, and the humidity increased significantly. These changes have great influence on the normal growth of vegetables.
Symptomatic prevention and treatment:
If vegetables are to grow well, vegetable farmers should keep up with the pace of weather changes and flexibly adjust management measures to form suitable environmental conditions for vegetable growth. Vegetable farmers should start from the following aspects:
Adjust the temperature difference between day and night
Reasonable diurnal temperature difference can balance plant growth, accelerate nutrient synthesis and transport speed to increase vegetable yield. However, the temperature difference between day and night is not the bigger the better, the most suitable temperature difference between day and night should be maintained at about 15 ° C. The temperature difference between day and night is too large, often because the high temperature in the daytime is too high, or the low temperature at night is too low, or both. Under the current weather conditions, these will affect the normal growth of vegetables. On the contrary, if the temperature difference between day and night is too small, most of the night temperature is high, the vegetable respiration is vigorous and the growth state is empty, the fruit development is slow, and the yield is reduced.
The temperature changes slowly, the rise and fall have "degree"
Regulating the appropriate temperature is the key to a reasonable temperature difference between day and night, but vegetable farmers should also reasonably grasp the "degree" to ensure that the temperature of the shed changes slowly and must not be too urgent. Whether it is heating up during the day or cooling down at night, farmers should adjust the width of the tuyere many times, and gradually expand or close the tuyere to ensure that the temperature of the shed slowly rises or falls. The slow change of temperature can preserve a certain buffer and adaptation time for vegetables, and reduce the occurrence of physiological diseases.
Reducing humidity and watering properly is key
At present, the increase in humidity in the shed is mainly caused by improper watering, such as excessive watering at one time. Vegetable farmers should take into account the weather, soil and plant conditions, reasonably adjust the amount of watering. In addition, in the current season, vegetables are easy to grow, and the practice of not watering for a long time is also wrong.
Balanced nutrient supply
With the decrease of night temperature, the activity of vegetable root decreased, and the plant was prone to hormone deficiency. In addition to taking insulation measures, vegetable farmers can also make up for it by spraying the leaf surface, especially the deficiency of medium and trace elements. When spraying the leaf surface, vegetable farmers should also pay attention to two points: first, spray in advance. Physical problems focus on prevention, wait until it happens to find a way to solve, the damage has been done. Nutritional supplementation should be carried out in advance, such as the maximum nutritional demand during the rising period, and supplementation as soon as possible after fruit. The second is to choose the appropriate product. Such as calcium is the most "lazy" of all nutrient elements, difficult to absorb, difficult to transport. Therefore, vegetable farmers should choose products with high calcium content, high absorption and utilization rate, and the effect of increasing production and improving quality is obvious.
