Gansu Academy of Agricultural Sciences introduced sweet potato cultivation technology seed prices

Telephone; 18801247085, QQ; 936555210 species selection. Detoxification best selection of new early maturing varieties, planting more than three months can yield 1500-2500 kg or more, listed the wrong season, you can get considerable economic benefits. Early planting option: Japanese yellow potato, SL-02, Yushu, Sushu No. 8 10 (52-7) short vine, early-maturing varieties, vine only 50-70 cm long, suitable for close planting, can achieve high yield, high efficiency . Where Japan yellow potato, Sl-02 and other yellow, deep orange flesh, good quality varieties of market selling. 4 months late planting in mid-July after closing the morning session planing sweet potato crop can be planted. 2. Fertilization ridge. Sweet potato crop is drought fear of floods, early planting should choose a well-drained, sandy soil to higher ground. The proportion of sweet potatoes absorb nitrogen, phosphorus and potassium is 1: 0.7: 2, while the need to apply a certain amount of zinc, iron, manganese, boron and other trace elements, potassium chloride ions in sweet potato is difficult to absorb, and the impact of potato quality , so the production of potassium sulfate administered better. Per 667 square meters of high-quality farmyard manure composting 2-3 cubic meters, ammonium bicarbonate 20-30 kg superphosphate 100 kg, 30-40 kg of potassium sulfate. Fertilizer and deep plowing ridge, ridge height 30 cm, ridge top width of 50 to 60 cm, transplanting a small line 50-60 cm, accusing him of 70-80 cm. Use mulching can also add a small shed double mulching. 3. Timely planting. The average temperature is stable at 15 degrees in the day, 5-10 cm ground temperature stable at 17 degrees can be planted. North China may, after April 20, can be planted in other regions in due course in accordance with local temperature conditions. Nongyan there "rather planted Shuangda head, not planted seedlings of summer," he said, showing early planting of sweet potato yield have a role. To seedlings before planting, weak seedlings were planted to prevent the development sooner or later inconsistent, resulting seedlings seedlings bullying phenomenon. Before ridge covered with phoxim fry or 90% trichlorfon crystal 9, leather or grain sprinkled on the earth, in the old sweet potato producing 5 percent of available stem lines Granules per 677 square meters 1 -1.5 kg was applied at the same time. Planting depth of 5-6 centimeters, so that the outer surface to stay 3 to 4 leaves as well, for the leggy seedlings can be truncated from the roots of some, leaving about 20 cm planting as well, can reduce the disease, but will also prevent wind down seedlings . Due to early planting vine early varieties with short, must use high-density planting, early harvest yield in order to achieve objectives, the general 24000-5000 plants per 667 meters. 4. Scientific Management. 3-5 days after sowing songs timely investigation seedlings fill the gaps, the seedling disease, weak seedling pulled out, Planting monthly robust Miao. Timely weeding earth, low temperatures in early spring, timely Row crop cultivators can increase in temperature, easy sweet potato early Huanmiao while spraying trifluralin, acetochlor and other chemical herbicides. Sweet potatoes into the growth medium to prevent waterlogging during the rainy season, as the soil water content, can cause poor ventilation, hinder the growth of sweet potato. Timely spraying of pesticides to control leaf insects, and other pests convolvuli. The rainy season rain for a long time can easily lead potato vine Genwang long, consumption of nutrients, when combined with weeding, the roots of sweet potato vines lift to quit, and then back in place, turn the vine is strictly prohibited. Qiancha for high yielding and excessive application of nitrogen fertilizer plots, sweet potato vines should be in front sealing ridge timely MET chemical control 2-3 times, the land has to be serious leggy topping combined with high concentration of control of MET. For general fertility or premature plots, should be combined with water, 667 square meters per person crack fertilizer potassium sulphate fertilizer around 15 kg, while spraying potassium dihydrogen phosphate and "sweet potato Expansin" 2-3 times. 5. Timely harvest. Sweet potato no significant maturity, early planting can be harvested in a timely manner in accordance with market conditions. Stop growing when the ground temperature of 15 degrees sweet potato, tuber below 10 degrees longer cold damage will occur. Sweet potato storage pit should be completed before the frost income, timely pit people, in order to avoid frost damage.