Double Seasons Virus-free Potato Cultivation Techniques

Double Seasons Virus-free Potato Cultivation Techniques

First, prepare before broadcast Spring varieties suitable for selection should be selected from early maturing varieties such as Jinnan No. 2, Jinnan No. 3, and Feiwuruituo; Qiutuo should use medium-maturing varieties such as Jinnan No. 12 and C5-22. 2. Fill the bottom water, apply enough base fertilizer to kill potatoes in the double-season soil to choose fertile sandy loam, increase organic fertilizer, deep plowing 25 to 30 cm, generally 667 square meters of cooked farmyard fertilizer 4 cubic meters, ammonium bicarbonate 50 kg, phosphate fertilizer 40 Kilograms, potassium sulfate 20 kg, fertilizer before sowing at the end of the first application, the bottom of the water before pouring in the freezing, in order to facilitate spring temperature rise, promote seedlings early hair. 3. Seed treatment 15 to 20 days before sowing, so that the seed potato breaks the dormant period as soon as possible. The day before planting, the seed potatoes are cut into 20 to 50 grams of the size of the tuber, to ensure that each piece has 1 to 2 buds. Disinfect with potassium permanganate solution or alcohol to prevent germ invasion. Second, timely sowing, a reasonable close planting spring 10 cm till the ground temperature reached 7 ~ 8 °C when planting, and strive to early sowing, generally in the March 5 before and after the planting, autumn and late autumn in late July sowing. In order to increase the number of potato layers, ridiculous sowing method should be used. Spring pods should be 100 cm long. The ridges should be 15 cm high and 40 cm wide at the top. Each ridge should be two rows with a spacing of 23 cm and a sowing depth of 8 cm. 5500 strains, 667 square meters sowing volume of 100 to 110 kg, after filming. The autumn ridge adopts single ridge planting method, which is ridged by 60 cm and so on. The ridge height is 100 cm and the bottom width is 30 cm. Each ridge is planted in one row. The density is the same as that of the spring hoe without covering, and it can be interspersed with corn and other high stalk crops. . Third, timely management The water supply of fertilizer and fertilizer is based on the pouring of water before planting. Usually, there is no need to water before sprouting to prevent leggy; if the seedlings are dry after the seedlings can be watered, the weather gradually becomes hot after being budded, and the film must be unsealed to prevent hot seedlings. And watering and fertilizing; into the swelling of the roots, fertilizer and water attack, often keep the soil moist. Top dressing is carried out with water. The topdressing amount is 15 kg per 667 square meter or 20 kg of potassium sulfate compound fertilizer. 2. After cultivating the soil in the cultivating field, the cultivars were once ploughed once and after the line was sealed. After removing the film, the spring hoe was combined with cultivating soil to increase the potato layer. 3. Spraying micro-fertilizer hormones to promote the expansion of potato stalks. After budding, they enter the period of potato and tuber enlargement. The potassium dihydrogen phosphate is sprayed on the foliar, and the root tubers are expanded. Generally, they are sprayed for 10 to 15 days with a total of 2 to 2 shots. 3 times. 4. Insects and pests prevention and control of potato common locust with aphids, underground pests and disease-based. Underground pest control was conducted before sowing, and 667 square meters of phoxim 2 kg were applied together with fertilizer. After emergence, they were treated with omethoate 800 times or imidacloprid 1000 times. When the humidity in the field is large, attention must be paid to the prevention and control of the epidemic, and foliar sprays such as phytosanitary creams and anti-virus lice can be used. China Agricultural Network Editor

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