种稻下氮肥的氨挥发及其在氮素损失中的重要性的研究
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AMMONIA VOLATILIZATION AND ITS SIGNIFICANCE TO THE LOSSES OF FERTILIZER NITROGEN APPLIED TO PADDY SOIL
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    摘要:

    在特制密闭盆钵甲,研究了15N标记氮肥作水稻基肥混施时,氨的挥发及其在氮素损失中的重要性,随着通气速率的增高,氨的挥发及其在氮素损失中的重要性也增大,至换气频率达15-20次/分时即接近或达到最大值.在酸性水稻土上,硫铵的氮素损失的主要途径是反硝化作用,特别是气温较低的月份;尿素的氮素损失途径,在气温较低的月份中以反硝化作用为主,在温度较高的月份中,则氨的挥发与反硝化作用都是重要的;对碳铵来说,氨的挥发和反硝化作用都是氮素损失的重要途径.在石灰性土壤上,碳铵的氮素损失的主要途径是氨的挥发,而在硫铵和尿素的氮素损失中,氨的挥发和反硝化作用则都是重要的.

    Abstract:

    Ammonia volatilization of SN-labelled nitrogen fertilizer incorporated with soil as basal fertilizer for rice was investigated in a special designed closed enclosure. Results showed that (1) the rate of ammonia volatilization and its influence on the total loss of fertilizer N was enhanced with the increase of the flushing frequency of air passing over the standing water on the soil surface, and approached the maximum at the flushing frequency of 15-20 times/min.(2) in acidic soil, denitrification was the major pathway of ammonium sulfate and ura in cooler season, however,ammonia volatilization became important for the loss of urea in warmer season, and both denitrification and ammonia volatilization were the important pathways of N loss of ammionium bicarbonate;(3) while in calcareous soil, ammonia volatilization and denitrification both were the important pathways of N Ibss of ammonium sulfate and urea, and N loss of ammonium bicarbonate mainly resulted from ammonia volatilization.

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朱兆良,蔡贵信,徐银华,张绍林.种稻下氮肥的氨挥发及其在氮素损失中的重要性的研究[J].土壤学报,1985,22(4):320-328. Zhu Zhaoliang, Cai Guixin, Xu Yinhua, Zhang Shaolin. AMMONIA VOLATILIZATION AND ITS SIGNIFICANCE TO THE LOSSES OF FERTILIZER NITROGEN APPLIED TO PADDY SOIL[J]. Acta Pedologica Sinica,1985,22(4):320-328.

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  • 在线发布日期: 2013-02-25
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