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作 者 ：张光亚1;2;陈美慈2;闵航2;柴卫国3

期 刊 ：植物营养与肥料学报 2002年 8卷 2期 页码：239-243

关键词：设施栽培；氧化亚氮；硝化；反硝化细菌；

Keywords:N2O flux, greenhouse culture, nitrifiers and denitrifiers,

摘 要 ：研究表明 ,设施栽培土壤N₂O释放通量比露地栽培土壤高 1.39倍 ;灌水处理N₂O释放较未灌水处理高 1.17倍。随着氮肥的增加 ,N₂O释放量急剧上升 ,其回归方程 y =256.96 +1.47x,r=0.9951^** 。 2种肥料施入土壤的5d内 ,施有机肥 (酵素菌肥 )的土壤N₂O的释放量高于施化肥的处理。通过检测硝化细菌和反硝化细菌数量的变化发现 ,施尿素处理的硝化和反硝化细菌数量比对照低 ,但是随着时间的推移 ,反硝化细菌数量又有上升的趋势 ;施用有机肥 (酵素菌肥 )处理的硝化细菌数量低于施用尿素处理 ,但反硝化细菌数量则明显高于尿素处理。

Abstract:The result of determination showed that the N₂O flux from the greenhouse was much higher(about 1.39 times) than that from the open field. The N₂O flux with irrigation was higher (about 1.17 times)than that without irrigation. With increase rate of urea, the N₂O flux sharply increased. The regression equation was y=256 96+1.427x, r=0.9951^**.The N₂O flux disposed by organic manure (ferment microbial manure) was higher than that by urea within 5 days. Determination of quantity of nitrifiers and denitrifiers found that there were fewer nitrifiers and denitrifiers in the urea treatment compared to CK, but the quantity of denitrifiers rose with the time prolonged. The quantity of nitrifiers disposed by organic manure was a little fewer than that by urea treatment, but there were obviously more denitrifiers.

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