文献类型： 外文期刊

作者： Li, Hongliang ¹ ; Zhu, Haitao ¹ ; Li, Hongbo ³ ; Zhang, Yuqiang ⁴ ; Xu, Sixin ¹ ; Cai, Shumei ¹ ; Sulaiman, Alharbi Almwarai ⁵ ; Kuzyakov, Yakov ⁶ ; Rengel, Zed ⁹ ; Zhang, Deshan ¹ ;

作者机构： 1.Shanghai Acad Agr Sci, Inst Ecol Environm Protect Res, Shanghai 201403, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Low carbon Green Agr, Shanghai 201403, Peoples R China

3.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China

4.Duke Univ, Nicholas Sch Environm, Durham, NC USA

5.King Saud Univ, Coll Sci, Dept Bot & Microbiol, Riyadh 11451, Saudi Arabia

6.Univ Gottingen, Dept Soil Sci Temperate Ecosyst, Dept Agr Soil Sci, D-37077 Gottingen, Germany

7.RUDN Univ, Peoples Friendship Univ Russia, Moscow 117198, Russia

8.Kazan Fed Univ, Inst Environm Sci, Kazan 420049, Russia

9.Univ Western Australia, UWA Sch Agr & Environm, Soil Sci & Plant Nutr, Perth, WA 6009, Australia

10.Inst Adriat Crops & Karst Reclamat, Split 21000, Croatia

11.Shanghai Acad Agr Sci, Inst Ecol Environm Protect Res, 1000 Jin Qi Rd, Shanghai 201403, Peoples R China

关键词： Root morphological traits; Root exudation; Microbial biomass turnover; Phosphate-solubilizing microorganisms; Nutrient fertilization and straw return; Crop P-use efficiency

期刊名称：SOIL BIOLOGY & BIOCHEMISTRY （ 影响因子：9.7； 五年影响因子：10.2 ）

ISSN： 0038-0717

年卷期： 2023 年 181 卷

页码：

收录情况： SCI

摘要： Phosphorus (P) mobilization by microorganisms influences root morphological and exudation traits related to crop nutrient acquisition. However, the dynamics of root P acquisition strategies in response to P immobilization followed by release that accompany microbial growth and decay remain unclear. We evaluated root-microbe interactions governing P uptake by Brassica chinensis and Solanum lycopersicum grown for 56 days in low-P (10 mg P kg -1) and high-P (100 mg P kg-1) soil with or without straw addition. Straw addition increased the growth of bacteria and fungi (including microorganisms harbouring the phoD, phoC and pqqC genes) and enhanced the microbial P pool. The high microbial abundance 29 days after straw addition was associated with short roots and weak carboxylate exudation in B. chinensis and S. lycopersicum regardless of P fertilization. Phosphate-solubilizing microbes harbouring the phoD, phoC and pqqC genes together with microbial P release increased plant-available soil P, influencing variation in root P-acquisition strategies between the species. The high level of CaCl2-extractable P due to P release upon microbial decay and phosphate-solubilizing microorganisms was associated with short roots and weak carboxylate exudation in B. chinensis, but underpinned crop nutrient acquisition in low-P soil amended with straw after day 40. S. lycopersicum increased root elongation in response to mobilization of microbial P after day 44. The long roots coupled with the increased P availability due to microbial P release elicited large P acquisition by S. lycopersicum in straw-amended, low-P soil. By contrast, microbial abundance and microbially mediated P availability had little influence on root P-acquisition strategies in B. chinensis and S. lycopersicum in high-P, straw-amended soil. This study highlighted the importance of temporally varying root-microbe interactions in influencing crop P acquisition in low-P, straw-amended soil.