Cultivation techniques of Spring Potato covered with plastic Film

Spring potato was sown from late January to early February, and was harvested and put on the market in the middle of May. The yield of tuber was about 1700 kg per mu, and the economic benefit was high. The cultivation techniques are as follows:

First, select improved varieties and strictly treat seed potatoes. The selection of excellent virus-free potato varieties is the basis of high-yield cultivation. The suitable varieties should be early maturing, high yield, stable yield, strong comprehensive disease resistance and good quality. Cut the seed potato longitudinally, 50ml 80g per piece, make sure each piece has an upper bud eye, soak it with carbendazim 1Grout 200x solution or smear the cut with plant ash, spread out until the potato pieces begin to soften for 2 days.

Second, deep ploughing and ridging. Potato growth period is short, plastic film cultivation, using one-time application of sufficient base fertilizer, 3000 kg of high-quality ash manure per mu, then deep turning, and then broken ridging, ridge bottom width 85 color 90 cm, ridge width 60 cm, ridge height 10 color 15 cm, and then sowing ditch along the ridge surface, along the sowing ditch, 30 kg / mu of high concentration compound fertilizer is applied, and the soil surface is raked lightly after application to avoid contact with fertilizer.

Third, reasonable close planting. Timely sowing and reasonable density are the key to obtain high yield. Sprouting and seeding in late January to early February. Double-row ridge cultivation was adopted, with a row spacing of 40m ~ 50cm and a plant spacing of 25m ~ 30cm, with 5500 plants per mu.

Fourth, do a good job of plastic film mulching. Before mulching, 72% of the mu is used for 100 ml, and the ridge surface is sprayed with 50 ml of water. The ridge surface should be flat, the film should be sealed strictly, and the film should be solid. Do a good job of clearing ditch and regulating soil moisture in time after plastic film mulching.

Fifth, strengthen the field management. Timely broken membrane to lift seedlings, found dead seedlings, lack of seedlings with preparatory seedlings to make up. Balance fertilizer was applied after full seedling, water point was irrigated with 5 kg urea per mu, 5 kg urea per mu during tuber forming period, and 10 kg high concentration compound fertilizer was used as expansion fertilizer. Spring potatoes generally do not need to branch, but the flower stems must be removed before flowering in order to concentrate nutrients for tuber expansion. Always keep the field dry and wet, especially after the potato, the field can not accumulate water, it is necessary to timely drainage and waterlogging, otherwise it is easy to cause potato rotting. The main diseases are virus disease, bacterial wilt and black shank. The seeds can be soaked with 200 times carbendazim to prevent virus disease and bacterial wilt, and 200-250PPM agricultural streptomycin can be used to control black shank. In the budding stage, 15% paclobutrazol was sprayed with 30 grams of paclobutrazol and 50 kilograms of water per mu, and Weitalin 4 was sprayed with 25 milliliters of water and 20 kilograms of water at the full flowering stage, which could dwarf the plants and promote the expansion of underground tubers, thus increasing the yield. According to the field experiment, after spraying Weitalin 4, the plant height decreased by 7.2 cm, the ratio of large tubers increased by 12.06%, and the yield increased by 9.02%.