豆科绿肥和化肥氮对双季稻稻田氧化亚氮排放贡献的研究
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* 国家自然科学重大项目基金(39790100)资助


NITROUS OXIDE EMISSIONS FROM PADDY SOILS AS AFFECTED BY INCORPORATION OF LEGUMINOUS GREEN MANURE AND FERTILIZATION DURING DOUBLE-CROPPING RICE-GROWING SEASON
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    摘要:

    研究了大田条件下施用绿肥与化肥N后,双季稻区稻田土壤氧化亚氮(N2O)的排放。结果表明,在早稻生长季节既施绿肥又施化肥的处理(VN)N2ON的排放量高达275kghm-2,显著高于只施绿肥不施化肥(V0)、只施化肥不施绿肥(FN)或既不施绿肥也不施化肥(F0)的处理(后三者在早稻生长季节N2ON的排放量分别为029kghm-2、035kghm-2和018kghm-2),也显著高于在晚稻生长季节各处理N2ON的排放量(VN、V0、FN和F0处理分别为034、026、028和023kghm-2)。绿肥不仅影响稻田土壤N2O的排放量,还影响其排放模式。VN处理N2O的排放主要集中早稻生长季节的中期烤田之后,其它处理则在整个水稻生长季节均有排放。在早稻生长季节绿肥与化肥N间还存在极显著的交互效应。

    Abstract:

    A field study was conducted to investigate effects of leguminous green manure and chemical fertilizer N on nitrous oxide (N2O) emissions from paddy soils under double-crop rice systems. Results demonstrated that during the early rice growing season, the treatment that received both green manure and synthesized N fertilizer emitted significantly more N2O than the other three treatments did, which received only green manure (V0), only synthesized N fertilizer (FN), or neither green manure nor chemical N fertilizer (F0), separately. The seasonal accumulative N2O-N emission was 2.75 kg hm-2 with the former, and 0.29 kg hm-2, 0.35 kg hm-2 and 0.18 kg hm-2, respectively with the other three. During the late rice growing season, 0.34, 0.26, 0.28 and 0.23 kg hm-2 was emitted from those four treatments respectively, all much lower than that from Treatment VN during the early rice growing season. Besides its effect on N2O emission rate, the incorporation of green manure also affected N2O emission time pattern. In Treatment VN, N2O evolution was concentrated mainly after the midsummer drainage during the early rice growing season, while in the other three treatment the N2O emission was distributed evenly throughout the entire rice growing season. The results also indicated that there existed great interaction between green manure and chemical N fertilizer during the early rice growing season.

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熊正琴,邢光熹,鹤田治雄,施书莲,沈光裕,杜丽娟.豆科绿肥和化肥氮对双季稻稻田氧化亚氮排放贡献的研究[J].土壤学报,2003,40(5):704-710. DOI:10.11766/trxb200203310510 Xiong Zheng-qin, Xing Guang-xi, Tsuruta H, Shi Shu-lian, Shen Guang-yu, Du Li-juan. NITROUS OXIDE EMISSIONS FROM PADDY SOILS AS AFFECTED BY INCORPORATION OF LEGUMINOUS GREEN MANURE AND FERTILIZATION DURING DOUBLE-CROPPING RICE-GROWING SEASON[J]. Acta Pedologica Sinica,2003,40(5):704-710.

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  • 收稿日期:2002-03-31
  • 最后修改日期:2002-09-10
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  • 在线发布日期: 2013-02-25
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