The cultivation of spring peanuts generally uses mulch film to cover the crop with reasonable application of fertilizer to win a good harvest. The mulching of plastic film has functions of increasing temperature, regulating temperature, preserving waterlogging, lifting concrete, controlling waterlogging, improving soil physical properties and near-surface microclimate. Premature aging is the main obstacle to limiting peanut production. Use symptomatic fertilizers to prevent premature aging.
(1) Apply slow-release fertilizer. Increased application of organic fertilizer, controlled-release fertilizer and other slow-release fertilizers ensure that peanuts have better nutrient supply in the middle and later stages of fertility.
(2) Spray fertilizer. At the later stage of peanut growth, foliar spray 1%-2% urea or 0.2%-0.4% potassium dihydrogen phosphate solution, or leaf fertilizer rich in NPK and microelements 2-3 times, interval of about 1 week.
(3) Activation control. According to the flower growth 2-3 times control.
(4) Strengthen the prevention and treatment of leaf spot disease. When the diseased leaf rate in the field reached 6%-8%, the spraying was started, spraying once every 10-15 days, and spraying 2-3 times. Commonly used agents include 72% agricultural streptomycin sulfate soluble powder, 1.5% polymycin wettable powder, 75% chlorothalonil wettable powder, and 50% carbendazim wettable powder.