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研究土壤氮素矿化和供应,不仅是评价土壤肥力的需要,而且也有助于确定氮肥的适宜用量。在这一方面,已经积累了大量的文献,也有一些文献综述。七十年代以来,为了预测土壤的供氮量或矿化过程,也提出了数学模式。我们曾经指出,在运用水解氮定量预测土壤供氮量时,必须针对具体条件确定一个换算系数,本文就是在研究水稻土氮素矿化和供应的同时,探讨用全氮或水解氮作为预测土壤供氮量指标的初步结果。
Studying soil N mineralization and supply is not only necessary for assessing soil fertility but also helps determine the appropriate amount of nitrogen fertilizer. In this regard, a large number of literatures have been accumulated, and some literature reviews have also been made. Since the 1970s, mathematical models have also been proposed for predicting soil nitrogen supply or mineralization. We have pointed out that in the quantitative prediction of soil nitrogen supply by using hydrolyzed nitrogen, a conversion factor must be determined according to the specific conditions. In this paper, while studying the mineralization and supply of nitrogen in paddy soil, we discuss whether using total nitrogen or hydrolyzed nitrogen as a predictive soil Preliminary results of nitrogen index.