It is often heard from farmers that they did not make any use of chemical fertilizers and that they were still brand-name products, which were always less effective than others. In fact, fertilization should also take into account the time and place, may wish to find the reasons from the following aspects.
To see the weather fertilization low-temperature season fertilization time should be appropriate in advance, organic fertilizer as a base fertilizer should be fully brewed decomposed; high temperature weather should be deep in order to prevent fertilizer dispersion and burning seedlings. The soil is too wet, the chemical fertilizer should be applied shallowly, and the soil should be deeper than the dry soil. When the drought is low, the soil moisture content is low. After the chemical fertilizer is applied, the crop is difficult to absorb and use. It should be combined with irrigation or drizzle rain to fertilize; do not apply fertilizer before heavy rain or heavy rain to prevent fertilizer loss and leakage loss.
It depends on the type of crop to apply root and tuber crops to apply phosphorus and potash fertilizers, and to apply nitrogen fertilizer; leafy vegetables should be applied with more nitrogen fertilizer and phosphorus fertilizer should be appropriate; rice, corn, wheat and other grasses need more nitrogen. Nitrogen fertilizer should be used as the main fertilizer, and phosphorus and potash fertilizers should be used; sugar fertilizers, hemp, and potato crops should be supplemented with nitrogenous fertilizers and potassium fertilizers should be added. The legume crops have rhizobia, which have the ability to fix nitrogen in the air, and the demand for nitrogen. Less so it is dominated by phosphate fertilizers.
It is necessary to discuss the difference in fertilization on cold sorghum, such as sweet potato, rice, cabbage, radish sprouts, after the winter stalk crops need to spend the winter and spring cold season, should be more decomposed sheep, donkey feces and other hot fertilizers; It is a mouthwash for wheat, potatoes, etc. It has sufficient time for leisure and sunburn. It is recommended to apply more cold-fertilizers such as rotten pigs and cow dung, which contain more moisture, and softer pods such as peanuts and soybean pods. More should be applied more phosphorus and potassium fertilizers; for hard pods, such as corn, sorghum, cotton pods, soil hard, should apply more organic fertilizer.
To see crop growth fertilization crops have different physiological characteristics at different stages of growth, fertilizer absorption and absorption time are also different. In the development stages of roots, stems, and leaves, more nitrogen fertilizer is generally needed. For example, the early rice growing season is short, and the peak of nitrogen uptake appears in the stage of returning to the stage of tillering (15 to 20 days) after transplanting. Therefore, it is necessary to reapply manure, stable panicle fertilizer and grain fertilizer. The early growth of hemp crops is fast, plant growth and fiber cell formation almost simultaneously, so in addition to meet the needs of nitrogen fertilizer in the early stage, potassium fertilizer should be applied simultaneously.
Fertilizers with stable chemical properties such as urea, diammonium phosphate, and superphosphate should be used as basal or seed fertilizers, or applied to root concentrates in advance; chemically unstable and volatile fertilizers such as ammonia , Ammonium phosphate, ammonium sulfate, ammonium nitrate, etc., should be deep-sealed to reduce nutrient losses; individual crops or fields need special fertilizers, such as paddy field should not be applied nitrate-nitrogen fertilizer, ammonium nitrogen fertilizer, sweet potato, potato, tobacco Such crops are not chlorine, should not use ammonium chloride, potassium chloride and other chlorine-containing fertilizers.
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