Antifreeze Strategy of Early Spring Potatoes
Potato is divided into spring and autumn planting in the north. Temperature is an important environmental factor, which affects its growth and development all the time, especially when the temperature drops below the lower temperature limit required for growth. , Potatoes are often subject to freezing injury, which can result in a reduction of 15% to 20%. Therefore, studying potato cold resistance and improving its anti-cold capacity is the top priority for the high yield of potatoes. Through experiments in the past two years, it has been found that the application of chemical fertilizers at the same time as the application of microbial fertilizer, and the application of amino acid foliar fertilizer during the cold spell can effectively improve the potato's ability to resist cold.
The specific effects of freezing injury on potatoes: 1. Plant death. The freezing injury in potato field mainly occurs in the seedling period in late spring. After manual operation, the leaves quickly wilted and collapsed. When the temperature rises, the affected area becomes water-stained and becomes brown after death. In the later period, there will be problems such as leggy plants and serious damage to late blight; 2. Delay in the time to market. In the unfreeze-infested year, potatoes should be listed 5 days in advance, so that the net income per mu can be increased by more than 300 yuan; 3. The output is reduced and the quality of the goods is reduced. The tubers of frozen potato expanded slowly or even stopped swelling, and tuber starch accumulated less and was not resistant to storage.
Four measures to improve the cold resistance of potato in early spring: 1. Reasonable selection of cold-resistant varieties. In northern areas, northern varieties should be used, such as Feiwu Ruiqi, Lu Yin No.1, and the Netherlands No.7, etc. Southern varieties are strictly prohibited; 2. Reasonable farming system. Changing the way of cultivation, changing the spring plowing to winter plowing, ploughing without hoeing can not only improve the physical and chemical properties of the soil, but also increase the soil heat reserve to a certain extent. 3. Cultivation measures. First, cover the film. The study found that the use of two-color film covering potatoes not only can avoid the soil pollution of the film, but also do not need to spray herbicides, and the freezing damage caused by pouring cold is also more than 60% lower than the ordinary white film. Second, improve fertilization techniques. The application of chemical fertilizers at the same time as the addition of the Golden Bacteria microbial fertilizer can not only balance the soil colony, enhance the disease resistance of the potato, but also improve the cold resistance of the potato. Finally, the application of foliar fertilizer technology. After nearly two years of experiments, it has been found that the spraying of foliar fertilizer products from the Golden Baby Soybean Amino Acid Foliar Fertilizer on the potato leaf surface can not only provide nutrition for the potato underground tubers from aboveground parts, but also can effectively improve the cold resistance of the aboveground parts. Ability to avoid the occurrence of frost damage during late spring. Details can be consulted: Beijing Huaxia Kangyuan Technology Co., Ltd. telephone toll-free hotline
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