Four key points for high yield of spring peanuts

Deep ploughing

Spring peanut planting field, deep ploughing at the end of autumn and winter is good, the general ploughing depth is 25-30 cm. Deep ploughing should be combined with the application of fertilizer. After deep ploughing in winter, it should be smoothed to prevent wind erosion. Deep ploughing should be adapted to local conditions, winter ploughing should be deep, and spring ploughing should be shallow. Spring ploughing should follow the ploughing, so as not to run through the wind.

Plastic film covering

The film mulching has the functions of temperature increase, temperature regulation, moisture conservation, waterlogging, water control and waterlogging, improvement of soil physical properties and near-earth microclimate.

Technical points: (1) Choose a suitable film. The conventional polyethylene film is selected to have a width of 90 cm and a thickness of not less than 0.004 mm. The summer peanut may be selected from a black mulch film or a color matching mulch film. (2) Specifications film, enough to sow. The quality of the film should be strictly controlled according to the key points of the film. Sowing soil moisture is about 70% of the maximum water holding capacity, and it is guaranteed to be planted in the appropriate period.

Increase density

In the case of stable yield per plant, it is most effective to increase the yield by increasing the density of peanut planting.

Technical points: (1) Spring peanuts. For early-maturing fruit varieties, the density is about 10,000 acre/mu, and each hole is the same (the same below). Mid-late ripe large fruit varieties are suitable for 0.8-0.9 million holes/mu. (2) Summer peanuts. Generally, the large peanut variety should reach 10,000 acre/mu, the small peanut should be 1.1-1.2 million holes/mu, and the summer direct seed peanut density should be 1.1-1.2 million holes/mu. (3) Machine-cast film sowing specifications. The ridge distance is 85 cm, the ridge surface width is 55 cm, the ridge surface is planted with two rows of peanuts, the furrow is 30 cm, the small row spacing is 35 cm, the large row spacing is 50 cm, the hole spacing is 16.5 cm, and the hole is 9500 holes.

Prevent premature aging

Premature aging is a major obstacle to limiting the increase in peanut yield. Measures are taken in time to ensure high yields of peanuts.

Technical points: (1) Application of slow release fertilizer. The application of organic fertilizer, controlled release fertilizer and other slow-release fertilizers ensure a good nutritional supply in the middle and late stages of peanut growth. (2) Foliar spray fertilizer. In the late growth stage of peanuts, foliar application of 1%-2% urea or 0.2%-0.4% potassium dihydrogen phosphate solution, or foliar fertilizer rich in NPK and micro-elements is 2-3 times, about 1 week apart. (3) Flexible control. According to the flower growth potential, 2-3 times of chemical control. (4) Strengthen the prevention and treatment of leaf spot disease. When the field disease rate reaches 6%-8%, the spraying starts, spraying once every 10-15 days, and even spraying 2-3 times. Commonly used agents are 72% agricultural streptomycin sulfate soluble powder, 1.5% polymycin antibiotic wet powder, 75% chlorothalonil wettable powder, 50% carbendazim wettable powder.