提出了用气相色谱直接测定水、土、粮食水果和蔬菜中10种有机氮农药多残留的分析方法。
A gas chromatographic method without derivatization was established for residue analysis of 10 organonitrogen pesticides in soil, water, cereals, fruit and vegetable.
随着新陈代谢作用的进行，以氨基糖为代表的微生物细胞壁残留物不断在土壤中积累，并进一步参与土壤碳、氮循环。
During the metabolism, the microbial residues represented as amino sugars were accumulated in soil and probably concerned in further carbon and nitrogen cycling.
施用氮肥可明显增加土壤硝态氮残留数量，并影响其剖面分布；
Application of N fertilizer significantly increased the amount of residual nitrate-N, and affected its distribution in the soil profile.
通过盆栽试验，利用固相萃取和气相色谱氮磷检测器分析方法研究了有机磷农药毒死蜱在小麦植株及其生长土壤中的残留特性。
The pot cultivation experiment method, integrated with SPE & GC-NPD, was developed for exploring the residual property of chlorpyrifos in wheat and soil.
继续增加施氮量，土壤微生物量氮含量增加，但土壤中残留大量硝态氮，易淋溶损失。
Applying more nitrogen would increase the content of soil microbial biomass nitrogen, but might result in large amount of nitrate residue in soil and suspected to leaching loss.
化肥氮残留很少，大部分进入土壤有机无机复合体中，而部分土壤氮被活化。
There was very little fertilizer N residue left, most of which entered the organo-mineral complex, while a part of the soil N was activated.
实验结果表明：废水中有机物浓度相对于氮量明显不足，而且残留土霉素等对反硝化有明显的生物抑制作用。
Nitrate utilization rate test showed that the contents of organic compounds in raw wastewater were not sufficient for complete denitrification.
从第三季作物收获到第五季作物收获，残留硝态氮的增加量占这一时期氮肥施用量的比例高达51.6%。
The increase amount of residual nitrate N from third harvesting to fifth harvesting was 51.6% of the total amount of applied nitrogen during this period.
采用氮磷检测器，毛细管气相色谱法测定蔬菜水果中有机磷农药残留的快速检测方法。
By NPD, Capillary gas chromatography of organophosphorus pesticides in vegetables and fruits rapid detection of residues.
采用氮磷检测器，毛细管气相色谱法测定蔬菜水果中有机磷农药残留的快速检测方法。
By NPD, Capillary gas chromatography of organophosphorus pesticides in vegetables and fruits rapid detection of residues.
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