不同施肥制度对褐土有机氮及其组分的影响

发布时间：2018-02-04 08:58

本文关键词： 不同施肥制度褐土有机氮组分变化　出处：《华北农学报》2017年03期 　论文类型：期刊论文

【摘要】：为探讨施肥对土壤有机氮及其组分含量的影响,通过8年田间定位试验,研究了长期不同施肥制度下褐土有机氮及其组分的变化规律。结果表明,与试前比较,不施肥主要消耗氨基酸氮和铵态氮,土壤酸解性总氮及氨基酸态氮、铵态氮、氨基糖态氮含量均显著减少,进而造成全氮含量下降。单施常量NPK化肥处理土壤全氮、酸解性总氮和氨基酸态氮出现下降趋势,氨基糖态氮含量显著降低,铵态氮含量则呈增加态势;增量NPK化肥处理主要通过提高铵态氮含量使酸解性总氮和土壤全氮略有盈余;有机肥(物)料配施常量NPK化肥各处理则表现为酸不溶性氮含量降低,并通过有效增加氨基酸态氮、铵态氮和氨基糖态氮含量进而使土壤酸解性总氮及全氮含量显著提高,增强土壤氮素供应水平。有机氮积累过程中,化肥氮主要进入土壤铵态氮和氨基酸态氮库,而有机肥(物)料氮则主要进入土壤氨基酸态氮库。
[Abstract]:In order to study the effect of fertilization on the content of soil organic nitrogen and its components, the changes of organic nitrogen and its components in cinnamon soil under long-term different fertilization systems were studied through eight years of field location experiments. The results showed that the changes of organic nitrogen and its components were compared with those before the experiment. No fertilization mainly consumed amino acid nitrogen and ammonium nitrogen, soil acidolytic total nitrogen and amino acid nitrogen, ammonium nitrogen, aminosaccharide nitrogen content decreased significantly. The total nitrogen and amino acid nitrogen of soil treated with constant NPK fertilizer decreased, the content of aminosaccharide nitrogen decreased significantly, and the content of ammonium nitrogen increased. Incremental NPK fertilizer treatment mainly increased the content of ammonium nitrogen, which resulted in a slight surplus of total acidolytic nitrogen and soil total nitrogen. Organic fertilizer (matter) with constant amount of NPK fertilizer treatment showed that the content of acid insoluble nitrogen decreased and the amino acid state nitrogen was increased effectively. The contents of ammonium nitrogen and aminosaccharide nitrogen increased significantly the content of total nitrogen and total nitrogen of soil acidolysis, and enhanced the level of soil nitrogen supply, during the process of accumulation of organic nitrogen. Fertilizer nitrogen mainly entered the soil ammonium nitrogen and amino acid nitrogen pool, while organic fertilizer nitrogen mainly entered the soil amino acid nitrogen pool.
【作者单位】：河北科技师范学院生命科技学院;沈阳农业大学土地与环境学院;
【基金】：国家重点研发计划项目(2016YFD0300305-4) 河北科技师范学院科学研究基金资助项目(2016)
【分类号】：S153.6
【正文快照】： 众所周知,表层土壤中氮素绝大部分为有机结合形态[1],其组分含量与性质对土壤供氮能力具有决定性意义。对于农业土壤来说,施肥是土壤氮素循环及土壤有机氮生物有效性的重要影响因子,因而国内外学者进行了大量的相关研究。Smith等[1]认为无论施用化肥还是有机肥,也不管施肥的结

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