"Three-film cover" planted early spring potato

In recent days, farmers in Shaanxi, Gansu, Shanxi and other places have called to consult about the new technology of early spring potato planting. To this end, the reporter interviewed Guo Zhiqing, a researcher at the College of Horticulture of Northwest A&F University. She said in an interview that early spring potato can pass the “three membranes”. Covering the way of cultivation, the effect is better. The three-film cover refers to the small arch shed with small arch shed and the cultivation mode of the mulch film, which can be planted for more than one month.

Technical points

Select varieties to use fresh foods that meet local market demand, precocious and high quality, such as Zhongshu No.3, Shuangfeng No.5, Zaodabai and Dongnong303.

Deep cultivation of fine hoes before planting organic fertilizer, deep ploughing, stalking the greenhouse film 7 to 10 days before sowing to increase the ground temperature.

The sowing method is to open a 5 to 7 cm shallow ditch with a bottom width of 20 cm. After applying the fertilizer, the small water is kept and the density is 4,500 to 5,000 per acre. After sowing, the soil should be covered with ridges, sprayed with herbicides and covered with plastic film; every 2 to 4 rows of buckled a small arch shed, and the vinyl shed film covers the arch surface.

In the field management, the light and temperature in the shed should be increased before the emergence of the seedlings to prevent the bad weather from damaging the arch shed; the seedling period should be artificially assisted to break the membrane; after the seedlings, the seedling water should be poured once according to the soil moisture, and the ridges should not be overfilled when watering; The water should be watered in time, avoiding flooding and ridges. It is necessary to keep the soil moist and not cause water accumulation in the field. At the same time, pay attention to the prevention and control of late blight.

Precautions

1. Select high-quality virus-free seed potatoes of early maturing varieties.

2. When the potato bud top film is to be broken, it is necessary to break the soil and introduce the seedlings in time, and compact the holes with soil.
3. The temperature in the shed is kept at 20 °C ~ 26 °C during the day. As the temperature rises, the ventilation is gradually increased. When the temperature is too high, the small arch shed is completely removed.

4, timely harvest, the specific harvest time depends on the market and production, and the morning market, to obtain good returns.

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