Different methods of fertilization according to different situations are important ways to increase fertilizer efficiency and increase crop yield. However, this point has been overlooked for a long time, resulting in increased costs and reduced benefits. Therefore, when fertilizing crops, the following five factors should be used to master the fertilization techniques.
First, due to gargle fertilization 1, enthusiasm. Such as wheat and potato pods, because of the early harvest, there is ample time for leisure sunburn, should be applied more water containing pig manure, cow dung and other cold fertilizers. 2, cold 茬. Such as cabbage, rape and other mouthwash, due to harvest late, should apply sheep manure, horse dung and other hot fertilizer. 3, soft pimple. For example, soya beans and other mouthwash, soil more moist and soft, leaving more nitrogen, should apply more fertilizer containing phosphorus, potassium. 4, hard cunning. Such as corn, sorghum and other mouthwash, soil tight, should be applied to contain more organic fertilizer.
Second, due to crop fertilization 1, legume crops. Due to rhizobia, nitrogen can be fixed by nitrogen-fixing bacteria. Therefore, less nitrogen is needed and more phosphorus is needed. Therefore, consider applying less nitrogen fertilizer when fertilizing. 2, grass crops. In addition to more nitrogen, more phosphorus and potassium are needed. When fertilizing, we should pay attention to the reasonable combination of nitrogen, phosphorus and potassium. 3, leafy crops. More nitrogen is needed, and nitrogen fertilizer should be the main fertilizer.
Third, due to soil fertilization with different soil types, there is a great difference in fertilizer retention and fertilizer supply capacity. The texture is heavy and the ground temperature is low. Attention should be paid to the fertilization and sandy soil at the seedling stage. Since the fertility conservation ability is poor, the amount of once-fertilized fertilizer should not be too large and should be applied in divided times.
4. Weather conditions affecting the growth of crop roots and absorption of nutrients due to fertilization weather conditions also affect the state of nutrients in the soil. Therefore, fertilization in the cold season should be appropriately advanced as needed. High-temperature fertilization should prevent the volatilization of fertilizers, and fertilization should be prevented in rainy days to prevent loss of fertilizers.
Fifth, due to the nature of fertilizer Fertilizer general chemical properties should be volatile volatile fertilizers, such as ammonium sulfate, ammonium nitrate, ammonium bicarbonate, etc. should pay attention to the application of fertilizer when deep-buried soil, reduce nutrient losses. For the smaller-moving phosphate fertilizer, it should be used as base fertilizer and seed fertilizer and applied to the root concentrate layer. Fertilizers that are soluble in water are suitable for topdressing. In paddy fields, nitrate nitrogen fertilizers should not be applied and ammonium nitrogen fertilizers should be applied.
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