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本文应用同位素~(15)N示踪法,通过盆裁试验研究了有机肥兔粪尿和化肥硫铵的残留氮的有效性与其化学形态分布的关系。结果表明:肥料残留氮的后效很低。小麦对兔粪尿残留氮的利用率在3.6—4.8%之间;在土壤中的残留率为82—89%,损失率为7—14%;小麦对硫铵残留氮的利用率为3.6—5.3%,在土壤中的残留率为69—76%,损失率为1.9—28%。二种肥料残留氮在氨基酸态氮和酸解性未知态氮二组分中的含量都相对地较高,而硫铵残留氮在这二组分中的含量相对地又比兔粪尿残留氮的高得多。硫铵残留氮的矿化量约95%是来自这二组分的氮素,而兔粪尿残留氮只有66—84%。文章还讨论了~(15)N%dff值的意义与应用。
In this paper, isotope ~ (15) N tracer method was used to study the relationship between the availability of residual nitrogen in organic manure excrement and the residual nitrogen of chemical fertilizer and its chemical distribution by pot experiment. The results show that the post-treatment effect of residual nitrogen fertilizer is very low. Wheat utilization rate of residual nitrogen in rabbit excrement was between 3.6-4.8%; the residual rate in soil was 82-89%, the loss rate was 7-14%; the utilization rate of wheat residual ammonium nitrogen was 3.6- 5.3%, the residual rate in the soil is 69-76%, the loss rate is 1.9-28%. The contents of residual nitrogen in the two kinds of fertilizers are relatively higher in the two components of amino acid nitrogen and the unknown unknown state nitrogen, while the content of residual ammonium nitrogen in the two components is relatively higher than that of the residual nitrogen Much higher. Approximately 95% of the ammonium sulphate residual nitrogen is derived from nitrogen from these two components, whereas the residual nitrogen from rabbit feces is only 66-84%. The article also discusses the meaning and application of ~ (15) N% dff values.