The benefit of "three early and three skillful" planting potatoes in spring is high

Three mornings:

Select early-maturing varieties. Practice has proved that the selection of high-yield, high-quality and virus-free potato varieties with a growth period of less than 70 days (from emergence to harvest) is the key to realize high yield, stable yield and high quality scale of spring potato. At present, the ideal varieties are Holland 7, Holland 15, Zhengshu 6 and so on.

Early sprouting. The use of sunny beds for early germination before sowing can make potato seedlings emerge early and well, complete seedlings, strong seedlings, conducive to early emergence and early fruiting of potatoes, which is an important measure to increase production. The key points of the sprouting technique are as follows: take out the seed potato 25-30 days before sowing, take out each kilogram of seed potato and cut it into 40-50 pieces per kilogram, each cut with 2 middle and upper bud roots, and mix the seeds with plant ash after cutting to make the knife edge heal. Then spread the seed blocks evenly in the sunny border, stack them with 3 layers of 2 Mel, cover them with clean wet sand 4 cm thick, then cover with plastic film to warm up, and cover with grass mulch at night to keep warm. When the bud length is 2ml / 3cm, spread out and pick the bud for 5 days under scattered light to make it green and strong for sowing.

Short-term early broadcast. After thawing, the soil should be watered, fertilized and prepared as soon as possible to prepare for early sowing. In the first ten days of March, when the temperature is stable through 7 ℃, the seeds can be sown. It is appropriate to adopt the method of ridging and plastic film mulching after sowing, with one film cover and two rows, with a large row spacing of 70m / 80cm, a small row spacing of 70m / 80cm, a small row spacing of 30m / 40cm and a plant spacing of 2327cm. After sowing, a ridge with a height of 5mer and 8cm was sprayed with herbicide and then covered with plastic film.

Sanqiao:

Skillful fertilization. The growth period of early-maturing potato is relatively short, and fertilization can apply sufficient base fertilizer and seed fertilizer before sowing according to the requirements of soil fertility and yield, without topdressing. Generally, 1 mu of rotten chicken manure is applied to 2 tons, potassium sulfate is 30 to 40 kilograms, urea is 15 kilograms, diammonium phosphate is 25 to 30 kilograms, and organic fertilizer and chemical fertilizer are scattered before ploughing, and the removal is concentrated in the sowing ditch (pay attention to mixing the fertilizer and soil evenly).

Water it skillfully. Potato is a crop that needs more water, and ensuring adequate water supply is an important condition to obtain high yield. Generally, there is no need to water before seedling emergence, and the first water can be watered according to soil moisture after seedling emergence. After budding, the underground stolon begins to expand and enters the peak period of water demand. Water should be watered once every 10 days to promote the tuber to expand rapidly.

Skillful management. It is necessary to break the membrane and release seedlings in time 20 days after sowing, and spray foliar fertilizer to strengthen seedlings and protect trees from full seedling to budding stage. 750 times of 15% paclobutrazol was sprayed at budding stage to control growth and promote tuber expansion. The main pests of early-maturing potato are aphids, red spiders, 28-star lady beetles, etc., which can be controlled by high-efficiency and low-toxic pesticides such as 1000 times of imidacloprid and 1500 times of red mites. Combined with pest control, foliar fertilizers such as potassium dihydrogen phosphate and Fur can be mixed to promote high yield and high quality.