High yield of potato needs to strengthen field management

The field management of potatoes should highlight an "early" word. The general requirements are early-stage early growth, medium-term stable growth, and late late decline. The key point of management is to timely weed and weed, topdress and fertilize the soil in the early stage, and pay attention to drainage, irrigation and prevention of pests and diseases in the later period. From the sowing to the emergence of potatoes, the potato is generally about 30 days. After sowing, the temperature rises gradually, the weeds grow, and the potatoes should be weeded in time. The topdressing should be early and should not be late. After the seedlings are 80%, the first top dressing is applied. 40-50kg of ammonium bicarbonate (or 15kg of urea) is applied. After topdressing, the fertilizer should be filled in time. Otherwise, the fertilizer cannot be dissolved and the roots cannot be absorbed. During the bud period, the soil is cultivated and watered. At the beginning of flowering, the potato pieces enter the rapid expansion period. The second cultivation and watering should be carried out in combination with weeding. The plants are finished before the ridges are closed to prevent the tuber from being exposed to green. At this point, depending on the growth of the plant, the second top dressing is determined. Generally, there is no topdressing. If necessary, a small amount of urea can be applied, about 10kg. Potatoes are more resistant to drought, but they must not be dehydrated if they are to be productive. It is appropriate to maintain the soil moisture content at 60-80% throughout the growth process. Especially in the high temperature stage in summer, when the soil temperature reaches about 30 °C, the varieties that are sensitive to high temperature will produce deformed tubers, timely irrigation, lowering soil temperature, and conducive to the normal growth of tubers. Water accumulated after the rain should be timely prevented, otherwise it will cause rotten potatoes in the field. Watering was stopped 10 days before harvest to facilitate harvesting and storage. In addition, according to the occurrence time of major pests and diseases in different regions, timely control of late blight, aphids, mites and so on. To prevent and control late blight, timely application of drugs to prevent field inspection before and after flowering, and immediately after the discovery of the central diseased plant. The diseased leaves on the plants in the vicinity and the plants were removed from the ground and the lime was removed. Then, the plants around the diseased plants were blocked with a spray of 1:100-200 times Bordeaux mixture + new high-fat film, and sprayed once more every 10 days. It can also be used with 25% syphilis WP 1000-1500 times + new high fat film, or 65% sensible zinc WP 500 times, or 50% carbendazim WP 500 times, or 40% Ethyl aluminum phosphate wettable powder 300 涪 liquid, or 75% chlorothalonil WP 600-800 times liquid spray, combined with the new high fat film spray can enhance the efficacy.

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