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尽管现在各类氮肥都有各自的特点,厂商也都说自己的产品如何优秀。但要作科学合理地施用氮肥,还要考虑土壤条件、氮肥的施用技术以及作物品种的需求等因素。根据土壤条件选择氮肥品种。在碱性土壤中,应选用酸性或生理酸性肥料,在酸性土壤中宜选用碱性或生理碱性肥料。盐碱土避免使用增加土壤盐分的肥料。低洼渍水土壤不应施用硫酸铵等含硫肥料,防止硫化氢生成。水田中不宜施用硝态氮肥,防止淋溶和反硝化作用。
Although all kinds of nitrogen fertilizer have their own characteristics now, manufacturers also say how their products are excellent. However, for scientific and rational application of nitrogen fertilizer, factors such as soil conditions, application techniques of nitrogen fertilizer, and crop varieties needs to be considered. Select nitrogenous fertilizer varieties according to soil conditions. In alkaline soil, should be used acidic or physiological acid fertilizers, acid soil should use alkaline or physiological alkaline fertilizer. Saline-alkali soil Avoid fertilizers that increase soil salinity. Low-lying waterlogging soil should not be applied with sulfur fertilizer and other sulfur fertilizer to prevent the formation of hydrogen sulfide. Nitrate nitrogen fertilizer should not be applied in paddy so as to prevent leaching and denitrification.