Stimulation of organic N mineralization by N-acquiring enzyme activity alleviates soil microbial N limitation following afforestation in subtropical karst areas
文献类型：期刊论文
| 作者 | Liu, Lijun1,2; Zhu, Qilin2; Wen, Dongni2; Yang, Lin1; Ni, Kang3; Xu, Xingliang4; Cao, Jianhua1; Meng, Lei2; Yang, Jinling5; Zhou, Jinxing6 |
| 刊名 | PLANT AND SOIL
 |
| 出版日期 | 2024-04-12 |
| 页码 | 16 |
| 关键词 | Karst Vegetation restoration Soil extracellular enzyme stoichiometry Microbial N limitation Mineralization |
| ISSN号 | 0032-079X |
| DOI | 10.1007/s11104-024-06668-w |
| 通讯作者 | Zhu, Tongbin(zhutongbin@gmail.com) |
| 英文摘要 | Aims Stoichiometry of soil extracellular enzymes such as the ratios of carbon (C)-, nitrogen (N)-, and phosphorus (P)-acquiring enzymes as well as their vector length and angle are used to reveal the biogeochemical equilibrium between microbial nutrient requirements and soil nutrient availability. However, the dynamics of soil extracellular enzymes activities and microbial N limitation following afforestation remain poorly understood in karst rocky desertification areas. Methods Soil samples were collected from Dodonaea viscosa plantations after 0, 10, 20, and 40 years of afforestation following the abandonment of croplands in a karst rocky desertification area, and a natural restored shrubland soil was served as the control. The activities of C, N, and P extracellular enzymes were measured and the stoichiometric and vector ratios of extracellular enzymes were calculated to quantify microbial nutrient limitation. Results The stoichiometric ratio of soil C: N:P acquisition enzymes was 0.63:1.48:1.0, with a vector angle of 34.7 in croplands, indicating high microbial N limitation. Compared to the croplands, D. viscosa afforestation significantly increased soil C-, N-, and P-acquiring enzyme activities and gradually increased C: N:P stoichiometric ratio and vector angle to 0.75:1.39:1-0.76:1.17:1 and 34.9-38.2, respectively, indicating that afforestation alleviated microbial N limitation. Furthermore, gross N mineralization and gross ammonium immobilization rates increased by 140-278% and 340-801% following afforestation due to the increase in soil organic C and total N contents and the > 2 mm soil aggregates. The vector angle positively correlated with beta-N-acetylglucosaminidase activity, gross N mineralization, and gross ammonium immobilization. Notably, the vector angle of extracellular enzymes following 40-year afforestation was still 6.63% lower than that of the shrubland soil. Conclusion Our results suggested that afforestation could substantially increase gross N mineralization through stimulating beta-N-acetylglucosaminidase activity and gross ammonium immobilization, thereby reducing microbial N limitation. However, this limitation persists even following long-term afforestation in karst rocky desertification areas. |
| WOS关键词 | ECOENZYMATIC STOICHIOMETRY ; NITROGEN TRANSFORMATIONS ; NUTRIENT ACQUISITION ; RETENTION CAPACITY ; MICROORGANISMS ; CARBON ; ACCUMULATION ; RECOVERY ; NITRATE ; MATTER |
| 资助项目 | National Natural Science Foundation of China |
| WOS研究方向 | Agriculture ; Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:001201750000002 |
| 出版者 | SPRINGER |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/204549]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zhu, Tongbin |
| 作者单位 | 1.Chinese Acad Geol Sci, Inst Karst Geol, Key Lab Karst Dynam, MLR & Guangxi, Guilin 541004, Peoples R China 2.Hainan Univ, Coll Trop Crops, Haikou 570100, Peoples R China 3.Chinese Acad Agr Sci, Tea Res Inst, Hangzhou 310008, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 5.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China 6.Beijing Forestry Univ, Sch Soil & Water Conservat, Jianshui Res Stn, Beijing 100083, Peoples R China 7.Justus Liebig Univ Giessen, Dept Plant Ecol, Heinrich Buff Ring 26, D-35392 Giessen, Germany 8.Univ Coll Dublin, Sch Biol & Environm Sci, Dublin, Ireland |
| 推荐引用方式 GB/T 7714 | Liu, Lijun,Zhu, Qilin,Wen, Dongni,et al. Stimulation of organic N mineralization by N-acquiring enzyme activity alleviates soil microbial N limitation following afforestation in subtropical karst areas[J]. PLANT AND SOIL,2024:16. |
| APA | Liu, Lijun.,Zhu, Qilin.,Wen, Dongni.,Yang, Lin.,Ni, Kang.,...&Mueller, Christoph.(2024).Stimulation of organic N mineralization by N-acquiring enzyme activity alleviates soil microbial N limitation following afforestation in subtropical karst areas.PLANT AND SOIL,16. |
| MLA | Liu, Lijun,et al."Stimulation of organic N mineralization by N-acquiring enzyme activity alleviates soil microbial N limitation following afforestation in subtropical karst areas".PLANT AND SOIL (2024):16. |
入库方式： OAI收割
来源：地理科学与资源研究所
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