What to Do If Too Much Nitrogen Fertilizer Is Applied to Rice? Detailed Treatment Methods
Nitrogen fertilizer is one of the indispensable elements for rice growth; it can promote rice growth and has a yield-increasing effect. But we all know what "going beyond the limit is as bad as falling short" means. If too much nitrogen fertilizer is applied, it will only harm the rice. So how should excessive nitrogen fertilizer application in rice be handled? Let's take a look at the detailed introduction below.
I. Harm of Excessive Nitrogen Fertilizer Application
Excessive nitrogen fertilizer application causes relatively great harm, and the harm differs at each growth stage. If too much nitrogen fertilizer is applied at the tillering stage of rice, the aboveground parts grow excessively while the root system grows slowly, so the roots cannot provide sufficient nutrients during tillering, causing shriveled grains. If too much nitrogen fertilizer is applied during the growth period, the plants grow luxuriantly, but the stems are weak and the plants are too tall, causing the lower parts to be shaded; the temperature and humidity are also higher, making it very easy for pests and diseases to breed, and lodging is also very likely in the later stage, seriously affecting the yield, and in severe cases causing total crop failure. Excessive nitrogen fertilizer application not only leads to the accumulation of a large amount of nitrate nitrogen in the rice, causing poisoning, and makes it vulnerable in the later stage with severe yield reduction, but also increases the protein content of the rice, affecting the taste.
II. Treatment Methods
1. Excessive nitrogen fertilizer application easily causes premature senescence. Spraying potassium dihydrogen phosphate can both increase yield and prevent premature senescence. Generally, at the booting stage and heading stage, use 100-200 g of potassium dihydrogen phosphate mixed with 15-20 kg of water for one spraying. This has a clear effect on the seed-setting rate and grain weight of rice. Because it is a high-concentration spray, it is recommended to use high-purity potassium dihydrogen phosphate, and it is not advisable to use potassium dihydrogen phosphate with more impurities, so as not to affect the effect.
2. Attention should be paid to the application of silicon fertilizer to enhance the lodging resistance of rice. If conditions permit, 1-2 appropriate topdressings can be applied to enhance the lodging resistance of rice, especially for fields near lakes and seas where the wind is strong; lodging resistance prevention is essential.
3. Pest and disease control must be done properly. When spraying potassium dihydrogen phosphate, it can be combined with benzyl propiconazole to prevent rice false smut and sheath blight. If it is a variety infected with rice blast, tricyclazole or pyraclostrobin can be added.
The above is an introduction to the treatment methods for excessive nitrogen fertilizer application in rice. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.