论文部分内容阅读
氮素在作物营养中占有重要地位,而土壤氮素却以有机氮为主,无机氮仅占土壤含氮量的百分之二、三.因此,从土壤肥力观点看来,有机氮具有极其重要的意义.有机氮中,以蛋白质、氨基酸含量最高.土壤氨基酸,一方面是蛋白质分解的产物,另一方面又是微生物合成物质.氨基酸参与了腐殖质的组成,又是植物、微生物的同化原料,毫无疑问,氨基酸对于植物、土壤微生物营养可能是重要的.近年来,对于氨基酸在土壤中的状况、游离氨基酸含量、氨基酸在土壤中的代谢等方面做了不少工作,这些对于阐明“土壤-植物营养化学”,丰富土壤生物化学无疑是有益的.一、土壤氨基酸的发现早在1871年Detmer就第一个证明土壤有机质具有蛋白质性质.Baumann(1887)认为土壤经过化
Nitrogen plays an important role in crop nutrition, while soil nitrogen is dominated by organic nitrogen, which accounts for only 2% and 3% of the soil nitrogen content. Therefore, organic nitrogen is extremely The significance of organic nitrogen, the highest protein and amino acid content of soil amino acids, on the one hand, the product of protein degradation, on the other hand, is a microbial synthesis of amino acids involved in the composition of humus, but also plants, microbial assimilation of raw materials , There is no doubt that amino acids may be important for plant and soil microbial nutrition.In recent years, a great deal of work has been done on the status of amino acids in soil, free amino acid content and metabolism of amino acids in soil, Soil-plant nutrition chemistry, enrich soil biochemistry is undoubtedly beneficial.First, the discovery of soil amino acids as early as 1871 Detmer first proved that the soil organic matter with protein properties.Baumann (1887) that the soil after the