论文部分内容阅读
用肥力高、中、低不同的十五个土样作盆栽试验,用四种有效氮化学测定法作土样分析,所得土测值与盆栽试验的小麦吸氮量和产量进行相关分析.结果表明碱解扩散法、碱解蒸馏法、碱性高锰酸钾蒸馏法.20%NaGl 提取蒸馏法相关性都极显著,这四种方法均适用于灌漠土有效氮的测定.
Fifteen soil samples with high fertility, medium and low fertility were potted and analyzed by soil samples with four available nitrogen chemical assays, and the correlation between the measured values and the nitrogen uptake and yield of wheat in the pot experiment was analyzed.Results The results showed that alkali hydrolysis, alkali distillation and alkaline potassium permanganate distillation showed that the correlation of 20% NaGl extractive distillation was extremely significant. All these four methods were suitable for the determination of available nitrogen in irrigation desertification soil.