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The relative contributions of pH, organic anions, and phosphatase to rhizosphere soil phosphorus mobilization and crop phosphorus uptake in maize/alfalfa polyculture

文献类型：期刊论文

作者Sun, Baoru4; Gao, Yingzhi2,3; Wu, Xue; Ma, Huimin; Zheng, Congcong; Wang, Xinyu; Zhang, Hualiang; Li, Zhijian; Yang, Haijun
刊名PLANT AND SOIL
出版日期2020
卷号447期号:1-2页码:117-133
ISSN号0032-079X
关键词Mycorrhizal colonization rate Phosphorus uptake Polyculture Rhizosphere phosphorus mobilization Root architecture Root exudates
DOI10.1007/s11104-019-04110-0
文献子类Article
英文摘要Aims To investigate the relative contributions of pH, organic anions concentration, and phosphatase activity to rhizosphere soil phosphorus availability and crop phosphorus uptake in polycultures. Methods A field experiment was conducted for three consecutive years in a split-plot design with main plots treated with two phosphorus levels and subplots treated with maize and alfalfa grown alone or intercropped. Results Intercropped maize and alfalfa had 0.35 and 0.24 units lower rhizosphere pH, 28% and 30% higher total organic anions (TOA) concentration, and 21% and 41% greater acid phosphatase activity than those in monoculture. These changes in root exudates induced significant increases in rhizosphere phosphorus concentration of intercropped maize and alfalfa by 21% and 41%, and pH and TOA had greatest contributions, respectively. Rhizosphere phosphorus mobilization facilitated phosphorus uptake of intercropped maize, but this facilitation was offset by phosphorus uptake reduction due to decreased crown root surface area. Lateral root volume enhancement accounted for phosphorus uptake improvement of intercropped alfalfa by 86.6%, while rhizosphere phosphorus mobilization only had a 0.2% contribution. Conclusions Rhizosphere pH and organic anions exhibit greater contributions than acid phosphatase activity in enhancing rhizosphere phosphorus availability. However, root surface area of maize and lateral root volume of alfalfa unveil greater influences on crop phosphorus uptake than rhizosphere pH and organic anions.
学科主题Agronomy ; Plant Sciences ; Soil Science
电子版国际标准刊号1573-5036
出版地DORDRECHT
WOS关键词INDUCED CHEMICAL-CHANGES ; LUPINUS-ALBUS ; ARBUSCULAR MYCORRHIZAL ; NUTRIENT AVAILABILITY ; CITRATE EXUDATION ; ACID-PHOSPHATASE ; DURUM-WHEAT ; ACQUISITION ; PLANTS ; L.
WOS研究方向Agriculture ; Plant Sciences
语种英语
出版者SPRINGER
WOS记录号WOS:000519658900010
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/21858]  
专题植被与环境变化国家重点实验室
作者单位1.Yili Normal Univ, Sch Biol & Geog Sci, Yining 835000, Xinjiang, Peoples R China
2.Northeast Normal Univ, State Environm Protect Key Lab Wetland Ecol & Veg, Changchun 130117, Jilin, Peoples R China
3.Chinese Acad Sci IBCAS, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100093, Peoples R China
4.Northeast Normal Univ, Key Lab Vegetat Ecol, Changchun 130024, Peoples R China
推荐引用方式
GB/T 7714		 Sun, Baoru,Gao, Yingzhi,Wu, Xue,et al. The relative contributions of pH, organic anions, and phosphatase to rhizosphere soil phosphorus mobilization and crop phosphorus uptake in maize/alfalfa polyculture[J]. PLANT AND SOIL,2020,447(1-2):117-133.
APA Sun, Baoru.,Gao, Yingzhi.,Wu, Xue.,Ma, Huimin.,Zheng, Congcong.,...&Yang, Haijun.(2020).The relative contributions of pH, organic anions, and phosphatase to rhizosphere soil phosphorus mobilization and crop phosphorus uptake in maize/alfalfa polyculture.PLANT AND SOIL,447(1-2),117-133.
MLA Sun, Baoru,et al."The relative contributions of pH, organic anions, and phosphatase to rhizosphere soil phosphorus mobilization and crop phosphorus uptake in maize/alfalfa polyculture".PLANT AND SOIL 447.1-2(2020):117-133.

入库方式： OAI收割

来源：植物研究所

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