In recent years, with the large-scale planting of late hybrid rice, the potassium deficiency reaction is more sensitive than conventional rice, and the effect of potassium deficiency on late rice yield is more obvious. Late rice is susceptible to low temperature and pests and diseases. Increasing potassium application can enhance disease resistance and cold resistance, extend leaf life, prevent the occurrence and development of premature aging, enhance root activity, and improve fertilizer absorption and utilization of late rice. Promote high yield and good harvest of late rice. How to make rational application of chemical potassium fertilizer in late rice? Generally pay attention to the following points:
The amount of potassium fertilizer should be appropriate. The application of potassium fertilizer is not as good as possible. The application of chemical potassium fertilizer per mu is 5~12 kg, and the rice yield is the most, and the economic benefit is also the best.
The application time should be based on the most needed potassium in young rice tissues, the highest potassium uptake from tillering to booting stage, and the fact that potassium can be transferred and reused in the body. If 5 kg of potassium chloride is applied per acre, it should be distributed. It is best to apply fertilizer at the beginning; if 10 kg of potassium chloride is used per acre of late rice, it is best to apply it twice. The first time before the transplanting, Pingtian Shi applies 6~7 kg per acre; the second is 3 per acre. ~4 kg in the late rice tillering stage, can be combined with the first nitrogen-seeding to meet the needs of late rice potassium absorption peak.
Hybrid late rice should be preferentially applied to potassium. Late hybrid rice is thick and stalked, and the roots are deep and leafy. Therefore, the amount of potassium needed is also corresponding. In places where chemical potash is scarce, the demand for hybrid late rice should be met first, and the application rate should be higher than that of japonica rice and other late rice. Hybrid late rice should be sprayed 1~2 times with potassium dihydrogen phosphate solution at the late growth stage.
Potassium fertilizer is applied to late rice. Potassium chloride is best used in poorly drained soil, and potassium sulfate is not used to prevent potassium sulfate from being reduced to sulfide roots.
Source: Farmers Daily
The amount of potassium fertilizer should be appropriate. The application of potassium fertilizer is not as good as possible. The application of chemical potassium fertilizer per mu is 5~12 kg, and the rice yield is the most, and the economic benefit is also the best.
The application time should be based on the most needed potassium in young rice tissues, the highest potassium uptake from tillering to booting stage, and the fact that potassium can be transferred and reused in the body. If 5 kg of potassium chloride is applied per acre, it should be distributed. It is best to apply fertilizer at the beginning; if 10 kg of potassium chloride is used per acre of late rice, it is best to apply it twice. The first time before the transplanting, Pingtian Shi applies 6~7 kg per acre; the second is 3 per acre. ~4 kg in the late rice tillering stage, can be combined with the first nitrogen-seeding to meet the needs of late rice potassium absorption peak.
Hybrid late rice should be preferentially applied to potassium. Late hybrid rice is thick and stalked, and the roots are deep and leafy. Therefore, the amount of potassium needed is also corresponding. In places where chemical potash is scarce, the demand for hybrid late rice should be met first, and the application rate should be higher than that of japonica rice and other late rice. Hybrid late rice should be sprayed 1~2 times with potassium dihydrogen phosphate solution at the late growth stage.
Potassium fertilizer is applied to late rice. Potassium chloride is best used in poorly drained soil, and potassium sulfate is not used to prevent potassium sulfate from being reduced to sulfide roots.
Source: Farmers Daily
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