Effects of long-term fertilization on the weed growth and community composition in a double-rice ecosystem during the fallow period
文献类型: 外文期刊
第一作者: Huang, Shan
作者: Huang, Shan;Pan, Xiaohua;Sun, Yanni;Zhang, Yi;Hang, Xiaoning;Yu, Xichu;Zhang, Weijian
作者机构:
关键词: inorganic fertilizer;manure;non-cropping season;paddy field;weed biodiversity
期刊名称:WEED BIOLOGY AND MANAGEMENT ( 影响因子:1.059; 五年影响因子:1.276 )
ISSN: 1444-6162
年卷期: 2013 年 13 卷 1 期
页码:
收录情况: SCI
摘要: The vegetation cover during the non-cropping season could have important implications for the maintenance and recovery of soil fertility, as well as for biodiversity conservation in croplands. In this study, five fertilization regimes (control: non-fertilization; N: inorganic N fertilization; P: inorganic P fertilization; NPK: balanced fertilization with inorganic N, P and K; NPKM: balanced NPK plus farmyard manure) were conducted from 1981 in a double-rice (Oryza sativaL.)-cropping system in subtropical China. The effects of long-term fertilization were investigated on the weed growth, diversity and community structure during the fallow period. The results showed that, relative to the control, both inorganic fertilization alone (N, P and NPK) and NPKM in the rice-growing season significantly increased the weed density and biomass during the fallow period in the paddy field. There was no significant difference in the weed species richness (the number of species) among the treatments. Compared with the control, fertilization tended to reduce the weed diversity (Shannon's H) and evenness (Shannon's E), especially in the N treatment. Long-term fertilization resulted in a significant shift in weed community's composition during the fallow period. The weed community's structure was affected by soil nutrients in the order P > N > K.
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