土壤氮素供应状况的研究 Ⅰ.土壤碱解时氨的释放速率作为预测植稻土壤氮素供应状况的指标
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INVESTIGATION OF NITROGEN SUPPLYING REGIME OF SOILS (I) RATE OF LIBERATION OF AMMONIA IN ALKALINE HYDROLYSIS AS AN INDEX FOR PREDICTING NITROGEN SUPPLYING STATUS OF RICE FIELD
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    摘要:

    一般说来,耕作土壤在作物生长期间的氮素供应状况是影响产量的最活泼因素之一。在土壤肥力不高、氮肥供应不足的情况下,增加氮肥用量,作物产量也随之相应的增加。过去关于氮肥施用效果的研究多偏重于施肥量与增产的关系,或不同土壤上施用氮肥的效果,在这方面长期以来集中了不少农业化学工作者的注意力。在研究方法方面,除了大量的田间及盆栽试验外,常用的是室内培养法,即测定土壤氮素供应能力或可矿化氮量。

    Abstract:

    To soils of pot, culture experiment, having top-dressed with manures and ammonium sulphate,the rate of liberation of ammonia during hydrolysis in different alkaline mediums was measured by distillation with MgO, CaO and 0.5 N NaOH, and by replacement of N NaOH solution ae room temperature (Conway's diffusion method). Soil samples were taken at intervals of 1,5,10,15,20 and 30 days after fertilization. Variations of nitrogen content in plant leaves at different stage of growth were also determined. Through mathematical analysis from the data involving rate and capacity of the liberation of ammonia in alkaline mediums, the writer endeavors to predict nitrogen supplying status of paddy soils through out the growing season of rice.Except soils recieved stable manures the amount of nitrogen from MgO distillation gives correlation with the V0 initial rate of liberation of ammonia of N NaOH diffusion method and distillation methods. Figures obtained in MgO distillation are higher than the ammonical nitrogen in soils. The increment is induced by the partial hydrolysis of amides.

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朱兆良.土壤氮素供应状况的研究 Ⅰ.土壤碱解时氨的释放速率作为预测植稻土壤氮素供应状况的指标[J].土壤学报,1962,10(1):55-72. CHU CHAO-LIANG. INVESTIGATION OF NITROGEN SUPPLYING REGIME OF SOILS (I) RATE OF LIBERATION OF AMMONIA IN ALKALINE HYDROLYSIS AS AN INDEX FOR PREDICTING NITROGEN SUPPLYING STATUS OF RICE FIELD[J]. Acta Pedologica Sinica,1962,10(1):55-72.

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  • 在线发布日期: 2013-02-25
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