Scientific application method of potash fertilizer

In addition to potassium chloride, potassium oxide, potassium sulfate and other fertilizers, straw, peanut seedlings, human manure, livestock manure, turf mud, plant ash and other farm manure, all contain different amounts of potassium components. Potassium can enhance plant photosynthesis, carbohydrate synthesis, so that crops stem robust, full grain. It can also improve the quality of crops. For example, starch content of sweet potato can be increased by 0.6%~2.1%, crude fat content of sesame can be increased by 0.8%, sugar content of sugarcane can be increased by 1.1%.

Potash can also enhance crop resistance. After applying potassium fertilizer to rice, it can reduce flax leaf spot, red blight, sheath blight and rice blast. It can also improve the cold resistance, drought resistance and lodging resistance of rice. Therefore, applying 0.5 kg potassium chloride to potassium deficient paddy field can increase rice yield by 2.5~5 kg.

Scientific Application Method of Potassium Fertilizer

When using potassium-containing farm manure, two points should be paid attention to: one is that the fertilizer effect is late, so it should be applied early; the other is that potassium in turf mud and plant ash is easy to be leached by water, so paddy fields should not be drained prematurely. Use potassium chloride and potassium sulfate with higher potassium content, pay attention to the application method:

1. Application rate: In potassium-deficient soil, 0.7 kg potassium chloride or 10 kg potassium sulfate per mu of rice has a significant yield increase effect.

2, application period: can be used as base fertilizer, can also be used as topdressing. As basal fertilizer or topdressing in early stage, the yield increase effect is better than that of late application. In the sandy field with poor fertilizer conservation, base fertilizer and topdressing should be combined and applied in stages.

3. Application method: When topdressing rice, the effect of deep application of ball fertilizer is the best. Generally, it should be applied with farm manure or nitrogen and phosphorus. After application, it is combined with the field. When it is applied to rice fields, it should be applied after dew or rain has dried on rice leaves to avoid burning leaves.