sesame
Potassium can promote the activation of various enzymes in plants and the smooth progress of various biochemical activities. At the same time, potassium can enhance the resistance of crops, and enhance the ability of crops to resist drought, freeze, cold and pests.
The absorption and accumulation of potassium by sesame is different from that of nitrogen and phosphorus. It is characterized by less two ends and more in the middle, while nitrogen is less in the early stage, more in the middle stage, and more in the later stage; phosphorus is less in the early stage, more in the middle, and more in the later stage. The absorption of potassium by sesame seeds is 95% in the 46-day period from the seedling stage to the capping stage, while the potassium absorption in the remaining 30 days is less than 5%. Potassium is no longer absorbed during the ripening period of sesame, and even potassium extravasation occurs. This requires the application of sufficient base fertilizer to meet the needs of potassium in the early and middle stages of sesame growth, which is the main measure for rational potassium application.
How to apply potassium fertilizer to sesame
The content of potassium in sesame plants was highest at the seedling stage and the bud stage. As the growth process progressed, the percentage of potassium in the plants gradually decreased. However, the absolute content of potassium in the whole plant is increasing. It is only at maturity, the increase is slow or no longer increases. Sesame seeds and whole plants contain a lot of potassium, which means that sesame itself requires a lot of potassium. However, Chinese sesame is cultivated in low- and medium-yield fields, soil organic matter is scarce, supply of nitrogen and phosphorus is very poor, and the shortage of nitrogen and phosphorus has become a fertility factor that determines whether sesame can be of high quality and high yield. Because the soil is not too potassium deficient, the application of potassium fertilizer is sometimes ineffective or even ineffective, so potassium fertilizer is also less important.
Sesame application of potassium fertilizer technology
However, in the special potassium-deficient soil, such as sesame cultivation on sand, or the application of a large amount of nitrogen fertilizer to sesame, the sesame production will be greatly increased. Although the soil potassium supply capacity is higher, potassium fertilizer must be applied to maintain the balance of nitrogen and potassium. Practice has proved that excessive application of any nutrient element will generally have adverse effects on the crop, and even if the sesame is applied excessively, there is almost no adverse effect, which proves that sesame is a potassium-producing crop. With the increase of sesame yield, and the application of nitrogen and phosphorus for several years without potassium application, there will be a situation in which nitrogen, potassium and phosphorus are out of balance; the soil is not deficient in potassium to potassium deficiency, and cultivation of sesame is not paid attention to the application of potassium fertilizer to non-application. Potassium is not allowed. In the absence of potassium, 5-10 kg of potassium chloride is applied per acre, and mixed with fine dry soil.
The above is the introduction of sesame application of potassium fertilizer technology, friends who plant sesame seeds, can refer to the above fertilization technology, combined with the actual planting situation, rational application of potassium fertilizer.
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