Reasons and solutions of potato premature aging
Potato premature aging refers to a series of "false ripening" phenomena that appear to be mature on the surface, such as falling leaves and dying before the harvest season, but actually do not reach natural physiological maturity. Some leaves have appeared yellow leaves, dead, and defertilization, which seriously affects the later production and can cause a yield reduction of more than 20%, which is premature aging.
How to avoid premature aging
1. Climatic reasons such as low temperature, low sunshine, high humidity and other natural reasons. When the temperature is low in early spring and winter, problems such as short seedlings and aging seedlings are prone to occur; the young leaves and fruits of crops with too strong sunlight are prone to dehydration and sunburn, and low sunlight affects photosynthesis It affects the synthesis of nutrients; the soil moisture is too high, the root system is damaged, and nutrients cannot be absorbed, which affects growth.
2. Causes of phytotoxicity: The use of herbicides containing hidden components, the repeated spraying of high-concentration regulators, azoles and other pesticides will cause hidden premature aging, and these premature aging often cannot be directly discovered by farmers and missed opportunities.
3. Improper fertilization and unbalanced nutrition, especially the lack of trace elements such as calcium, magnesium, boron, and zinc, can cause yellowing of functional leaves, lower photosynthetic efficiency, and inhibit crop growth. Calcium deficiency, poor root system, weak ability to absorb fertilizer; magnesium deficiency, yellow old leaves, early leaf fall; boron and zinc deficiency, yellow leaf lobules, affecting the synthesis of nutrients and potato quality.
Suggest to strengthen management
1. Removal of old leaves Timely removal of old leaves, dead leaves and diseased leaves can not only reduce nutrient consumption, but also effectively control the spread and spread of diseases, which is conducive to ventilation and light transmission and lower temperature.
2. Pay attention to moisture. If the soil is too dry in the middle and late stages, add moisture in time to ensure the supply of water on the leaf surface. At the same time, it can also reduce the ground temperature, which is conducive to the expansion and maturity of tubers. At the same time, if the soil is too wet, it should be drained in time to avoid excessive leaf surface consumption of nutrients, or aggravation of disease.
3. Foliar fertilizer must be quickly supplemented. Foliar supplement is the best choice. It is recommended that growers choose a special leaf fertilizer for Yeshuo rhizomes and spray it for 2 to 3 times to reach the roots quickly, especially for increasing production and improving commercial properties in the later period.
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