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The role of complementarity and selection effects in P acquisition of intercropping systems

文献类型： 外文期刊

作者： Li, Xiao-Fei 1 ; Wang, Cheng-Bao 2 ; Zhang, Wei-Ping 1 ; Wang, Le-Hua 1 ; Tian, Xiu-Li 1 ; Yang, Si-Cun 2 ; Jiang, Wan 1 ;

作者机构： 1.China Agr Univ, Key Lab Plant Soil Interact, Beijing Key Lab Biodivers & Organ Farming, Coll Resources & Environm Sci,Minist Educ, Beijing 100193, Peoples R China

2.Gansu Acad Agr Sci, Inst Soils Fertilizers & Water Saving Agr, Lanzhou 730070, Gansu, Peoples R China

关键词： Crop diversity;Interspecific facilitation;Niche differentiation;Overyielding;Phosphorus

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： 2018 年 422 卷 1-2 期

页码：

收录情况： SCI

摘要： Enhanced crop productivity by intercropping is commonly assumed to be driven by resource complementarity. However, relatively few studies have directly measured resource acquisition to assess potential mechanisms underlying enhanced performance of intercropping. A long-term field experiment with three P application rates (0, 40, 80 kg P ha(-1) yr.(-1)) and four maize-based intercropping systems was used to assess P acquisition and P fertilizer recovery efficiency (PRE) for three consecutive years. To identify underlying mechanisms, the additive partitioning method was applied to determine complementarity (CE) and selection effects (SE) in P acquisition of intercropping. Average P acquisition increased by 28.4% and 27.6% compared to their monocultures in faba bean/maize and chickpea/maize intercropping, respectively. However, P acquisition was generally not enhanced and even reduced in the last year in soybean/maize and oilseed rape/maize intercropping. Enhanced P acquisition was due to positive CE in faba bean/maize, and to positive CE and SE in chickpea/maize intercropping. Increased resource acquisition via CE and/or SE depended on the particular crop combination in intercropping systems. Application of the additive partitioning method to intercropping may help to identify underlying mechanisms of overyielding and carefully select crop combinations to enable more efficient resource use.

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[1]Diversity enhances agricultural productivity via rhizosphere phosphorus facilitation on phosphorus-deficient soils. Li, Long,Li, Shu-Min,Sun, Jian-Hao,Zhou, Li-Li,Bao, Xing-Guo,Zhang, Hong-Gang,Zhang, Fu-Suo.

[2]Intercropping maintains soil fertility in terms of chemical properties and enzyme activities on a timescale of one decade. Wang, Zhi-gang,Li, Xiao-fei,Jin, Xin,Christie, Peter,Li, Long,Bao, Xing-guo,Zhao, Jian-hua,Sun, Jian-hao.

[3]Wheat/maize or wheat/soybean strip intercropping I. Yield advantage and interspecific interactions on nutrients. Li, L,Sun, JH,Zhang, FS,Li, XL,Yang, SC,Rengel, Z. 2001

[4]Intercropping alleviates the inhibitory effect of N fertilization on nodulation and symbiotic N-2 fixation of faba bean. Li, Yu-Ying,Yu, Chang-Bin,Cheng, Xu,Li, Chun-Jie,Zhang, Fu-Suo,Li, Long,Li, Yu-Ying,Sun, Jian-Hao,Lambers, Hans,Li, Long. 2009

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

[6]Interspecific facilitation of nutrient uptake by intercropped maize and faba bean. Li, L,Zhang, FS,Li, XL,Christie, P,Sun, JH,Yang, SC,Tang, CX. 2003

[7]Effect of phosphorus application and strip-intercropping on yield and some wheat-grain components in a wheat/maize/potato intercropping system. Zhang, Enhe,Huang, Gaobao,Zhang, Lijun,Wang, Gang,Zhang, Lijun,He, Chunyu,Zhang, Bo,Wang, Qi,Qiang, Shengjun. 2011

[8]Crop yield, nitrogen uptake and nitrate-nitrogen accumulation in soil as affected by 23 annual applications of fertilizer and manure in the rainfed region of Northwestern China. Yang, Sheng-Mao,Malhi, S. S.,Song, Jian-Rong,Xiong, You-Cai,Yue, Wei-Yun,Lu, Li Li,Wang, Jian-Guo,Guo, Tian-Wen. 2006

[9]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.

[10]Dynamics of root length and distribution and shoot biomass of maize as affected by intercropping with different companion crops and phosphorus application rates. Xia, Hai-Yong,Christie, Peter,Zhang, Fu-Suo,Li, Long,Zhao, Jian-Hua,Sun, Jian-Hao,Bao, Xing-Guo,Christie, Peter.

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