Luxury Absorption of Phosphorus Exists in Maize When Intercropping with Legumes or Oilseed Rape-Covering Different Locations and Years

文献类型： 外文期刊

第一作者： Xia, Haiyong

作者： Xia, Haiyong;Wang, Lan;Kong, Weilin;Xue, Yanhui;Xia, Haiyong;Wang, Lan;Song, Jie;Jiao, Nianyuan;Chen, Lei;Mei, Peipei;Wang, Zhigang;Ding, Hongbo;Yin, Yulong;Lan, Yufeng;Guo, Xiaotong;Wang, Xiaofeng;Li, Meng

作者机构：

关键词： intercropping; facilitation; niche complementarity; phosphorus use efficiency; luxury absorption; harvest index

期刊名称：AGRONOMY-BASEL （ 影响因子：3.417； 五年影响因子：3.64 ）

ISSN： 2073-4395

年卷期： 2019 年 9 卷 6 期

页码：

收录情况： SCI

摘要： Rational regulation of phosphorus (P) use in the soil-rhizosphere-plant system is challenging in the development of sustainable, intensive, and healthy agriculture. Rational maize (Zea mays L.) based intercropping with legumes/oilseed rape across six experimental sites from 2008 to 2017 proved advantageous over monoculture in terms of both maize biomass production and P uptake. The partial land equivalent ratio (PLER) for P uptake by intercropped maize averaged from 0.58 to 0.92, which was significantly higher than that for biomass production (0.51-0.78), indicating that the advantage of P acquisition by intercropped maize was superior to that of biomass accumulation. It was the excessive accumulation of P in intercropped maize compared to monoculture, especially higher P concentrations in grains that led to the superior P acquisition advantage and luxury absorption of P. P concentrations in maize grains were significantly increased from 1.89-2.91 mg kg(-1) in monoculture to 2.09-3.65 mg kg(-1), in intercropping, by 8.3%-25.5%. The plant internal P use efficiency of maize was significantly decreased from the initial 411.7-775.7 kg kg(-1) in monoculture to 345.7-710.4 kg kg(-1) in intercropping by 4.9%-16.0%, and 100 kg maize grain P quantities were significantly increased from 0.25-0.46 kg to 0.27-0.54 kg by 7.0%-17.4%. Rational fertilizer P input maximized maize yields and P use without decreasing the interspecific ecological advantages and harvest indexes of grain yields and P. These findings promoted better understanding of P allocation status within maize plants, and yield and P acquisition advantages through the exploitation of the biological potential of plants for the efficient utilization of P resources in diverse species combinations.

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