Precautions for applying potassium fertilizer in rice

Potassium fertilizer in rice can achieve significant yield increase. Potassium is sufficient to enhance photosynthesis, promote sugar synthesis and accumulation, improve plant resistance, enhance the respiration of rice roots, promote nitrogen uptake and protein synthesis, and make rice grains full, high yield and stable yield. However, the following four points must be noted when applying potassium fertilizer:

1. The dosage is reasonable. Adhere to the principle of "four more than four less". Tian Duo Shi, which has less potassium, is less applied; early rice is applied more, late rice is less applied; high stalks are applied more, dwarf stalks are less applied; hybrid rice is more applied, and conventional varieties are less applied. Tests have shown that applying 7.5~10 kg of potassium chloride per mu has the greatest economic benefit.

2, suitable fertilization. Rice needs the most potassium in the tillering stage and the panicle differentiation stage. Potassium fertilizer is applied once, preferably in the tillering stage; for two applications, it should be applied in the tillering stage and the young panicle differentiation stage.

3. Cooperate with fertilization. Potassium should be combined with phosphorus and nitrogen to fully exert its effectiveness. The ratio of nitrogen, phosphorus and potassium should be 1:0.5:1.2.

4. Lime is applied as appropriate. Potassium chloride and potassium sulfate are physiological acid fertilizers. The long-term use will cause acidification of the soil. Lime should be applied as needed to neutralize the acidity of the soil to facilitate rice growth.

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