In recent years, with the large-scale planting of late hybrid rice, the effect of increasing the yield of potassium fertilizer in late rice has become more and more obvious, especially in late hybrid rice.
Generally, the potassium deficiency reaction of hybrid late rice is more sensitive than that of conventional rice. The effect of less potassium on late rice yield is more obvious. Late rice is susceptible to low temperature and pests and diseases. Increasing potassium fertilizer can enhance disease resistance and cold resistance, and extend leaf life. To prevent the occurrence and development of premature aging, it can also enhance the vitality of roots, improve the absorption and utilization of fertilizers in late rice, and promote the 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 three points:
First, the amount of potassium fertilizer should be appropriate. Potassium fertilizer application is not as much as possible. The application of chemical potash fertilizer per mu is 5-12 kg to increase rice yield, and the economic benefit is also the best.
Second, the time of application should be appropriate. According to the most need of potassium in young rice, the highest potassium uptake from tillering to booting stage and the fact that potassium can be transferred in the body and can be reused. If 5 kg of potassium chloride is applied per acre, it is best to apply the top dressing effect at the beginning of tillering. Good; if 10 kg of potassium chloride is used per mu of late rice, it is best to apply it twice. The first time before the transplanting, Pingtian Shi, 6-7 kg per acre, the second time with 3-4 kg per acre in the late rice tillering stage. It can be combined with the first nitrogen scavenging to meet the needs of potassium uptake in late rice.
Third, hybrid rice should give priority to potassium application. Due to the thick stalks and deep roots, the hybrid late rice requires a corresponding amount of potassium. 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 sulfate from being reduced to sulfide roots.
Generally, the potassium deficiency reaction of hybrid late rice is more sensitive than that of conventional rice. The effect of less potassium on late rice yield is more obvious. Late rice is susceptible to low temperature and pests and diseases. Increasing potassium fertilizer can enhance disease resistance and cold resistance, and extend leaf life. To prevent the occurrence and development of premature aging, it can also enhance the vitality of roots, improve the absorption and utilization of fertilizers in late rice, and promote the 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 three points:
First, the amount of potassium fertilizer should be appropriate. Potassium fertilizer application is not as much as possible. The application of chemical potash fertilizer per mu is 5-12 kg to increase rice yield, and the economic benefit is also the best.
Second, the time of application should be appropriate. According to the most need of potassium in young rice, the highest potassium uptake from tillering to booting stage and the fact that potassium can be transferred in the body and can be reused. If 5 kg of potassium chloride is applied per acre, it is best to apply the top dressing effect at the beginning of tillering. Good; if 10 kg of potassium chloride is used per mu of late rice, it is best to apply it twice. The first time before the transplanting, Pingtian Shi, 6-7 kg per acre, the second time with 3-4 kg per acre in the late rice tillering stage. It can be combined with the first nitrogen scavenging to meet the needs of potassium uptake in late rice.
Third, hybrid rice should give priority to potassium application. Due to the thick stalks and deep roots, the hybrid late rice requires a corresponding amount of potassium. 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 sulfate from being reduced to sulfide roots.
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