| Perennial cover crop biomass contributes to regulating soil P availability more than rhizosphere P-mobilizing capacity in rubber-based agroforestry systems | |
Liu, Chenggang1; Wang, Qing-Wei; Jin, Yanqiang ; Tang, Jianwei1; Lin, Fangmei3; Olatunji, Olusanya Abiodun4
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| 2021 | |
| Source Publication | GEODERMA
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| ISSN | 0016-7061 |
| Volume | 401Issue:xxPages:- |
| Abstract | Cover crops used in agroforestry systems (AFS) are generally perceived to improve soil quality, but mechanisms underlying phosphorus (P) cycling in complex rhizosphere system are less clear, because the impacts of incorporated crops are often determined by inclusion time, residue management and species. We quantified 7-year cumulative effects of perennial legume cover crop-Flemingia macrophylla on rhizosphere P cycling and availability during the dry and wet seasons in young and mature rubber-based AFS (i.e., YAFS and MAFS) in tropical China by analyzing cover crop biomass and P content, as well as net rhizosphere changes in P-mobilizing capacity (pH, organic acids and phosphatase activity) and P fractions. Compared to their monoculture counter-parts, YAFS enhanced plant biomass and P stock in both seasons, whereas MAFS exhibited an opposite trend, except for increased biomass and P stock of floor litter in the dry season. Moreover, YAFS had a greater effect on net rhizosphere properties by reducing pH and increasing organic acids concentrations and acid phosphatase activity, but MAFS hardly alter them. However, these changes had little effect on net rhizosphere P fractions in both seasons, except the contribution of calcium-P to increasing P availability to a certain extent. Net rhizosphere organic P and microbial biomass P in YAFS were enhanced in both seasons by abundant residue returns from cover crop. Net rhizosphere available P surplus occurred in YAFS in the dry season and maintained balance in the wet season, but it almost reached a deficit in MAFS in both seasons. These results suggest that rhizosphere P cycling was more improved by cover crop in YAFS than MAFS, and biomass of cover crop residue contributed to regulating rhizosphere P cycling and availability more than rhizosphere P-mobilizing capacity. Our study highlights the importance of residue management of permanent cover crops on rhizosphere P cycling and availability in AFS with different ages. |
| Keyword | PHOSPHORUS AVAILABILITY AGRICULTURAL SOILS NUTRIENT CONTENT ENZYME-ACTIVITY ORGANIC-ACIDS ROOT-GROWTH RESIDUES POOLS MANAGEMENT LEGUMES |
| Subject Area | Agriculture |
| DOI | 10.1016/j.geoderma.2021.115218 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000667306700015 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://ir.xtbg.ac.cn/handle/353005/12264 |
| Collection | 2012年后新成立研究组 |
| Affiliation | 1.Chinese Acad Sci, CAS Key Lab Trop Plant Resources & Sustainable Us, Xishuangbanna Trop Bot Garden, Menglun 666303, Peoples R China 2.Chinese Acad Sci, Ctr Plant Ecol, Core Bot Gardens, Xishuangbanna 666303, Peoples R China 3.Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Shenyang 110016, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Fujian Normal Univ, Coll Geog Sci, Fuzhou 350007, Peoples R China |
| Recommended Citation GB/T 7714 | Liu, Chenggang,Wang, Qing-Wei,Jin, Yanqiang,et al. Perennial cover crop biomass contributes to regulating soil P availability more than rhizosphere P-mobilizing capacity in rubber-based agroforestry systems[J]. GEODERMA,2021,401(xx):-. |
| APA | Liu, Chenggang,Wang, Qing-Wei,Jin, Yanqiang,Tang, Jianwei,Lin, Fangmei,&Olatunji, Olusanya Abiodun.(2021).Perennial cover crop biomass contributes to regulating soil P availability more than rhizosphere P-mobilizing capacity in rubber-based agroforestry systems.GEODERMA,401(xx),-. |
| MLA | Liu, Chenggang,et al."Perennial cover crop biomass contributes to regulating soil P availability more than rhizosphere P-mobilizing capacity in rubber-based agroforestry systems".GEODERMA 401.xx(2021):-. |
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