Excessive nitrogen fertilizer harms rice
1, too much nitrogen fertilizer will cause rice greed, nutrient growth, low seed setting rate. It will cause low rice production and damage farmers' economic income.
2. Excessive nitrogenous fertilizers will cause increased pests and diseases. Due to the relatively young stems and leaves, it is very likely that the rice leaf roller is difficult to control. In recent years, it has become more serious. Very serious, in general, too much nitrogen fertilizer can also cause sheath blight, rice blast disease is serious, sharp blight disease field, rice planthoppers will also be serious.
3, excessive application of nitrogen fertilizer will cause late lodging, nitrogen fertilizer will make rice vegetative growth, internode distance, may cause late rice lodging.
Late nitrogen fertilizer excess treatment method
1, spraying potassium dihydrogen phosphate, increase production to prevent premature aging.
2. In the booting and heading stages, it is recommended that 100-200 g of potassium dihydrogen phosphate (P and K source) be sprayed with 15 kg of water once, which is helpful for the later 1000-grain rice weight and seed setting rate. Due to the high concentration of spray, it is recommended to use high-purity potassium dihydrogen phosphate such as phosphorus and potassium source pools, and it is not recommended to use more potassium dihydrogen phosphate as impurities.
3, appropriate use of silicon fertilizer, enhance resistance to lodging. The conditional farmers can use 1-2 silicon fertilizers to enhance the lodging resistance of rice, especially for farmland near the edge of the lake and the sea in Jiangsu Province, where the wind power is large, and the prevention of lodging is necessary.
4, pest control must be in place. Proposed use of benzonicyclazole and potassium dihydrogen phosphate (phosphorus and potassium source reservoir) together to prevent rice smut and sheath blight, rice susceptibility susceptibility, it is recommended to add tricyclazole or pyraclostrobin to prevent .
In traditional rice cultivation, growers are very dependent on nitrogen fertilizers, and some of them are relatively neglected for phosphorus and potassium fertilizers, which is still unfavorable for high rice yield. However, if it is a proper amount of nitrogen fertilizer, it will still be helpful for the growth and high yield of rice.
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