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Nitrogen fixation of faba bean (Vicia faba L.) interacting with a non-legume in two contrasting intercropping systems

文献类型： 外文期刊

作者： Fan, Fenliang 1 ; Zhang, Fusuo 2 ; Song, Yana 2 ; Sun, Jianhao 2 ; Bao, Xingguo 2 ; Guo, Tianwen 3 ; Li, Long;

作者机构： 1.China Agr Univ, Coll Resources & Environm Sci, Beijing 100094, Peoples R China

2.China Agr Univ, Coll Resources & Environm Sci, Beijing 100094, Peoples R China; Gansu Acad Agr Sci, Inst Soils & Fertilizers, Lanzhou 730070, Peoples R China; Fujian Acad Agr Sci, Biol Technol Ctr, Fuzhou 350003, Peoples R China

3.China Agr Univ, Coll Res

关键词： biological nitrogen fixation;dominant species;interspecific interactions;N-15 isotope natural abundance;maize/faba bean;subordinate species;wheat/faba bean;%Ndfa;%Ndfs;delta N-15

期刊名称：PLANT AND SOIL （ 影响因子：4.192； 五年影响因子：4.712 ）

ISSN： 0032-079X

年卷期： 2006 年 283 卷 1-2 期

页码：

收录情况： SCI

摘要： A field experiment was carried out to quantify biological nitrogen fixation (BNF) using the N-15 isotope natural abundance method in maize (Zea mays L.)/faba bean (Vicia faba L.) and wheat (Triticum aestivum L.)/faba bean intercropping systems. Faba bean was yielding more in the maize/faba bean intercropping, but not in the wheat/faba bean intercropping. Biomass, grain yield and N acquisition of faba bean were significantly increased when intercropped with maize, and decreased significantly with wheat, irrespective of N-fertilizer application, indicating that the legume could gain or lose productivity in an intercropping situation. There was yield advantage of maize/faba bean intercropping, but no in wheat/faba bean intercropping. The grain yield of the faba bean intercropped with maize was greater than that of faba bean monoculture due to increases of the stems per plant and the pods per stem of faba bean. N fertilization inhibited N fixation of faba bean in maize/faba bean and wheat/faba bean intercropping and faba bean monoculture. The responses of different cropping systems to N-fertilizer application, however, were not identical, with competitive intercropping (wheat/faba bean) being more sensitive than facilitative intercropping (maize/faba bean). Intercropping increased the percentage of N derived from air (%Ndfa) of the wheat/faba bean system, but not that of the maize/faba bean system when no N fertilizer was applied. When receiving 120 kg N/ha, however, intercropping did not significantly increase %Ndfa either in the wheat/faba bean system or in the maize/faba bean system in comparison with faba bean in monoculture. The amount of shoot N derived from air (Ndfa), however, increased significantly when intercropped with maize, irrespective of N-fertilizer application. Ndfa decreased when intercropped with wheat, albeit not significantly at 120 kg N/ha. Ndfa was correlated more closely with dry matter yield, grain yield and competitive ratio, than with %Ndfa. This indicates that that total dry matter yield (sink strength), not %Ndfa, was more critical for the legume to increase Ndfa. The results suggested that N fixation could be improved by yield maximization in an intercropping system.

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[1]Intercropping with wheat leads to greater root weight density and larger below-ground space of irrigated maize at late growth stages. Li, Long,Li, Long,Zhang, Fusuo,Sun, Jianhao. 2011

[2]Contribution of interspecific interactions and phosphorus application to sustainable and productive intercropping systems. Xia, Hai-Yong,Wang, Zhi-Gang,Christie, Peter,Zhang, Fu-Suo,Li, Long,Zhao, Jian-Hua,Sun, Jian-Hao,Bao, Xing-Guo,Xia, Hai-Yong,Christie, Peter.

[3]Root distribution and interactions between intercropped species. Li, L,Sun, JH,Zhang, FS,Guo, TW,Bao, XG,Smith, FA,Smith, SE.

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