Cultivation techniques of Potato after Flood

The varieties with good shape, high yield, rapid expansion of potato pieces and high temperature tolerance at seedling stage, such as Kexin No. 4, should be selected.

Selecting seed potato and sprouting seed potato should choose the spring potato harvested in the same year, and strictly pick out the diseased potato, rotten potato, damaged potato and poorly formed potato pieces, and the small whole potato of 20 to 40 grams is the best. The whole potato should be sown in autumn, the seed potato is about 25g / mu and the dosage is 150kg / mu. The whole potato uses gibberellin 1 gram, soaks the seeds for 15 minutes in the middle and late July and sprouts naturally in the shade. When the buds grow to 1.5 centimeters, the seeds can be sowed.

To sow in autumn, it is necessary to sow late, generally from August 8 to 15, and choose the weather with no heavy rain in 2-3 days. Open a shallow ditch to sow seeds with a depth of 8 cm to 10 cm. Sow seeds under the water. Then cover the soil to form a small high ridge, which is 8 cm high and 10 cm high.

Plastic film mulching should be planted in wide and narrow rows, and sufficient base fertilizer should be applied combined with sowing. According to the large row spacing of 70cm, the small row spacing of 30cm, the plant spacing of about 20cm. 30kg / mu of potassium sulfate compound fertilizer was applied between two small rows. After covering the soil, the ridge is 5 centimeters high and 60 centimeters wide, and then double rows are covered with plastic film, requiring the plastic film to be completely covered with 1 centimeter of soil, preferably invisible, and the soil that has been washed away should be re-covered with each heavy rain. The seedlings can emerge after 4-6 days of planting, and the seedlings can be released by breaking the membrane. at the same time, the seedlings are covered with soil at the place of breaking the film.

Fine management, scientific and rational watering of the seedlings, watering the seedlings once, and watering the plants after the regiment. After entering October, the potato enters the expansion period, and the ditch remains moist. When the weather is dry, the potato is watered once every 7-10 days. Do not flood.

Scientific fertilization, reasonable cultivation of soil and open field cultivation, in the potato rosette stage, the application of organic fertilizer 2: 3 square, potato special fertilizer 50: 75 kg, and a soil cultivation. Entering the expansion period in the middle of October, 25,50kg ammonium sulfate fertilizer was applied and soil cultivation was carried out again.

The main pests harming potato are ladybug, beet armyworm, Plutella xylostella, aphids and so on. The main choice of chemicals: vegetable farmers 600 times 800 times; 2% aphid grams 1500 times 2000 times; 2.5% kungfu 2000 times 2500 times alternate spray, once every 7 to 10 days. Generally speaking, from the middle of September to the middle of October, the protective medicine should be sprayed every 7 to 10 days. 80% Mengfeiling, 8% Dasheng M45, 58% early epidemic Ling ~ manganese zinc, 50% Esther 600% 800 times should be applied alternately. After the onset of the disease, you can choose 58% Remicol, 72% Krow, 50% Anke mixed with Esther 600mm 800 times spray. Once every 7-10 days, 2-3 times in a row.

Spraying regulator combined with pest control in the stage of tuber formation, "Tianda ~ 2116" underground rhizome special solution was sprayed in time. After an interval of 10-15 days, Tianda-2116 was sprayed twice at intervals of 7-10 days, which could stabilize the plant cell membrane, promote the growth and control the growth.