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水田土壤氮的释放方式与地温关系密切,根据地温资料可以进行土壤氮矿化量的预测本试验采用杉原等提出的动力学方法对水田土壤氮矿化过程进行研究. 试验在日本福冈县进行.选取常施厩肥比较肥沃的吉木土壤A和二日市土壤A,以及施厩肥少比较贫瘠的吉木土壤B和二日市土壤B.四种土壤均采新鲜土样,通过2mm筛,除去石砾和植株残体.在内径为2.5 cm,高12 cm的培养管内放入相当于20g干土的新鲜土样.淹水置于恒温培养箱中培养1—105 d.培养温度分别为20℃、25℃和30℃.矿化氮的测定时间
Soil nitrogen release from paddy soil is closely related to soil temperature, and soil nitrogen mineralization can be predicted based on geotemperature data. In this study, the kinetic method proposed by Sugihara was used to study the process of nitrogen mineralization in paddy soil. Select the more fertile manure often fertilization Jiamu A soil and soil in Arika City, as well as less fertilizing Jimi soil less fertile B and soil II Bichi soil samples were taken fresh soil, through 2mm sieve to remove debris and plant debris In the diameter of 2.5 cm, height 12 cm culture tube into the equivalent of 20g dry soil fresh soil samples flooded placed in a constant temperature incubator for 1-105 days incubation temperature were 20 ℃, 25 ℃ and 30 ℃. Determination of mineralized nitrogen time