After entering the winter, bad weather such as low temperature, sunshine, fog, rain and snow are increasing, which is not conducive to the growth of vegetables in the facilities, especially the long-term low-light weather, because of lack of light, low temperature in the greenhouse, poor photosynthesis of vegetables, and manufacturing. The organic nutrients are less, the plants do not receive adequate nutrients for a long period of time, the roots and leaves accelerate aging, the plant stems are fine, the leaves are small, the leaves are yellow, the growth is weak, the yield is low, the resistance to disease and stress is weakened, and eventually the plants are prematurely decayed. . Therefore, it is recommended that vegetable farmers make early efforts to start from day-to-day management, cultivate strong trees, increase plant resistance, and help plants survive bad weather.
First of all, leave fruit reasonably and cultivate strong trees. The bad weather has a high vegetable price. Many vegetable farmers are pursuing short-term high-efficiency, leaving too many fruits, causing slow plant growth. When they encounter even cloudy days, they are prone to premature aging. This is most evident in crops such as eggplants, peppers, and other crops. It is recommended that growers strengthen pruning and fruit thinning to reduce the burden on the plants and avoid too many fruit sets.
Secondly, watering should be suitable and fertilization has purpose. Even on cloudy days, some vegetable farmers are not used to watering for a long time, resulting in drought in the shed, and some are watered, fertilized too much, and the roots are seriously damaged. These can easily lead to premature plant failure. In the case of continuous cloudy days, the transpiration of vegetables is weak and requires less water, but it does not require water and fertilizer. Instead, because root activity is weak, it should be adjusted to the optimum humidity. When observing soil moisture, 10 cm away from the ground surface should be selected. Here, the root system is the largest, which is the key to the determination of root absorption. This ensures that the soil is held in groups and spreads out. It is the soil most suitable for vegetable root absorption, relative humidity. The range is from 70% to 85%. If there is a drought, it should be poured with small water, and it is advisable to dry it with water and leave no water. For fertilizer selection, products that increase plant resistance and delay premature plant failure should be applied, such as potassium dihydrogen phosphate, seaweeds, cytokinins, and brassinolides.
Finally, the amount of regulator must be flexible. On cloudy days, special care should be taken to avoid excessive application of plant growth regulators to prevent premature aging caused by hormonal intoxication. In the low temperature during flowering, picking melon, plant growth regulators use high concentrations, long-term continuous use is likely to cause hormonal intoxication. For plants that develop hormonal intoxication, they can be sprayed with 600 times more protective agents or cytokinins and 6,000 times more for love.
In addition, before the advent of extreme weather, it is necessary to actively cooperate with the facility agriculture that supplements light and temperature, and avoid plant mutations and irreversible damage.
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