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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

作者： Xia, Haiyong 1 ; Wang, Lan 1 ; Jiao, Nianyuan 3 ; Mei, Peipei 4 ; Wang, Zhigang 5 ; Lan, Yufeng 6 ; Chen, Lei 3 ; Ding, H 1 ;

作者机构： 1.Shandong Acad Agr Sci, Crop Res Inst, Shandong Prov Key Lab Crop Genet Improvement Ecol, Jinan 250100, Shandong, Peoples R China

2.Shandong Normal Univ, Coll Life Sci, Jinan 250014, Shandong, Peoples R China

3.Henan Univ Sci & Technol, Coll Agr, Luoyang 471000, Peoples R China

4.Henan Inst Sci & Technol, Coll Life Sci & Technol, Xinxiang 453003, Henan, Peoples R China

5.China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China

6.Yantai Univ, Sch Environm & Mat Engn, Yantai 264005, Peoples R China

7.Ludong Univ, Sch Agr, Yantai 264025, Peoples R China

8.Shandong Normal Univ, Coll Geog & Environm, Jinan 250358, Shandong, Peoples R China

9.Univ Calif UC Davis, Coll Agr & Environm Sci, Dept Plant Sci, Davis, CA 95616 USA

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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