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从理论上分析,土壤中的氮素,可以通过氨的挥发、硝酸盐的反硝化作用以及随地表径流和渗漏等途径,而造成损失。但是,在各地不同的气候土壤条件下,不同途径损失所产生的影响却不相同。深入研究不同气候土壤条件下,造成氮素损失的主要途径,对采用合理的施肥技术,减少氮素损失,提高氮素化肥的经济效益,具有重要的意义。为此,几年来我们结合教学和生产实践,对我们所处的阿克苏塔里木垦区旱地土壤的氮素动态情况,进行了初步的探讨。现提出一些粗浅的看法,以便为生产,以及为进一步深入研究,提供参考。
Theoretically, nitrogen in soil can be lost by ammonia volatilization, denitrification by nitrate and by surface runoff and seepage. However, under different climate and soil conditions all over the world, the impact of different path losses is not the same. In-depth study of different climate and soil conditions, resulting in nitrogen loss of the main ways, the use of reasonable fertilization techniques, reduce nitrogen losses, increase the economic benefits of nitrogen fertilizer, is of great significance. For this reason, in the past several years, we have conducted a preliminary discussion on the nitrogen dynamics of the soil in the dry land in the reclamation area of Aksu Tarim, where we live, in combination with teaching and production practices. Here are some superficial views to provide a reference for production, as well as for further study.