Rational rotation of peanuts can increase production
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1. Peanut root secretion itself poisoned. Organic acids secreted by their roots can, under normal circumstances, dissolve mineral nutrients that cannot be absorbed directly in the soil and are conducive to microbial activity. However, after years of heavy ash, excessive accumulation of organic acids in the soil has caused peanuts to become poisoned by themselves, resulting in underdeveloped root systems, short plants, low branches, weak growth, and premature aging.
2. Peanuts require many elements such as nitrogen, phosphorus, and potassium, especially for phosphorus and potassium. After many years of heavy mashing, peanuts require a large number of nutrient elements, affect normal growth, result in few fruits, and produce low yields.
3. Soil spread pests and diseases. For example, root-knot nematode disease is transmitted by nematodes that remain in the soil; leaf spot disease is mainly caused by hyphae and conidia overwintering on the remaining leaves to infect in spring. Heavy pests cause serious damage to peanut pests and cause significant reductions in production.
All localities can rationally arrange for rotations to be carried out according to the actual situation. The main rotation method is:
1) Peanuts - winter wheat - corn (sweet potato or sorghum) - winter wheat - peanuts.
2) Rape - peanuts - wheat - corn - rapeseed - peanuts.
3) Wheat - Peanut - Wheat - Cotton - Wheat - Peanuts.