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EFFECT OF CONTROLLED RELEASE FERTILIZERS ON METHANE EMISSION FROM PADDY FIELD

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Author:
No author available
Journal Title:
CHINESE JOURNAL OF APPLIED & ENVIRONMENTAL BIOLOGY
Issue:
4
DOI:
10.3321/j.issn:1006-687X.2005.04.004
Key Word:
CH4排放;控释肥料;尿素;复合肥;稻田

Abstract: 采用静态箱法研究了控释肥料和常规肥料处理对赤红壤稻田CH4排放的影响.结果表明:①在水稻生长期间,相比对照(CK),不同肥料处理均促进了稻田CH4日排放,其影响顺序为:Crf≥Scotts>Urea≥Com>CK;②在移栽后75 d和90 d时,各处理的水稻地上部干物质积累量与其CH4日排放通量间相关系数分别为0.829 8 和0.653 9,均达极显著水平;③在水稻生殖生长期,各处理CH4阶段累积排放量占全生育期的32.60% ~ 40.08%,其日排放通量在全生育期中居最高值,控制稻田CH4排放的最适时期应是水稻幼穗分化期;④相比复合肥,控释肥一次施用和尿素分次施用均显著地降低了全球增温潜势. 图2 表2 参19

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