Mechanisms behind soil N dynamics following cover restoration in degraded land in subtropical China
文献类型： 外文期刊
作者： Zheng, Xiangzhou 1 ; Lin, Cheng 1 ; Guo, Baoling 1 ; Yu, Juhua 1 ; Ding, Hong 1 ; Peng, Shaoyun 2 ; Zhang, Jinbo 3 ; Irel 1 ;
作者机构： 1.Fujian Acad Agr Sci, Inst Soil & Fertilizer, Fuzhou 350013, Peoples R China
2.Changting Monitoring Stn Soil & Water Conservat, Longyan 366300, Peoples R China
3.Nanjing Normal Univ, Sch Geog Sci, Nanjing 210023, Peoples R China
4.Univ Melbourne, Sch Agr & Food, Melbourne, Vic 3010, Australia
5.Justus Liebig Univ Giessen, Inst Plant Ecol, Heinrich Buff Ring 26, D-35392 Giessen, Germany
6.Univ Coll Dublin, Sch Biol, Dublin, Ireland
7.Univ Coll Dublin, Environm Sci & Earth Inst, Dublin, Ireland
关键词： N-15 tracing technique; Inorganic N supply; N retention; Cover restoration
期刊名称：JOURNAL OF SOILS AND SEDIMENTS （ 影响因子：3.308； 五年影响因子：3.586 ）
ISSN： 1439-0108
年卷期： 2020 年 20 卷 4 期
页码：
收录情况： SCI
摘要： Purpose Nitrogen (N) is an important nutrient for re-vegetation during ecosystem restoration, but the effects of cover restoration on soil N transformations are not fully understood. This study was conducted to investigate N transformations in soils with different cover restoration ages in Eastern China. Materials and methods Soil samples were collected from four degraded and subsequently restored lands with restoration ages of 7, 17, 23, and 35 years along with an adjacent control of degraded land. A N-15 tracing technique was used to quantify gross N transformation rates. Results and discussion Compared with degraded land, soil organic carbon (SOC) and total N (TN) increased by 1.60-3.97 and 2.49-5.36 times in restoration land. Cover restoration increased ammonium and nitrate immobilization, and dissimilatory nitrate reduction to ammonium (DNRA) by 0.56-0.96, 0.34-2.10, and 0.79-3.45 times, respectively, indicating that restoration was beneficial for N retention. There were positive correlations between SOC content and ammonium and nitrate immobilization and DNRA, indicating that the increase in soil N retention capacity may be ascribed to increasing SOC concentrations. The stimulating effect of SOC on ammonium immobilization was greater than its effect on organic N mineralization, so while SOC and TN increased, inorganic N supply did not increase. Autotrophic and heterotrophic nitrification increased with increasing SOC and TN concentrations. Notably, heterotrophic nitrification was an important source of NO3--N production, accounting for 47-67% of NO3--N production among all restoration ages. Conclusions The capacity of N retention was improved by cover restoration, leading to an increase in soil organic carbon and total N over time, but inorganic N supply capacity did not change with cover restoration age.
- 相关文献
作者其他论文 更多>>
-
Herbicide Applications Reduce Gaseous N Losses: A Field Study of Three Consecutive Wheat-Maize Rotation Cycles in the North China Plain
作者：Zheng, Xiangzhou;Zou, Chenyi;Wang, Yasa;Ding, Hong;Zhang, Yushu;Qin, Shuping
关键词：herbicides; ammonia volatilization; denitrification; North China Plain
-
Co-incorporation of Chinese milk vetch (Astragalus sinicus L.) and chemical fertilizers alters microbial functional genes supporting short-time scale positive nitrogen priming effects in paddy soils
作者：Wang, Limin;He, Chunmei;Huang, Dongfeng;Liu, Cailing;Li, Qinghua;Huang, Yibin;Li, Juan;Wang, Fei;Yu, Juhua
关键词：green manure; gross priming effect; incorporation practice; microbial mechanism; net priming effect; rice field soil
-
Long-term nitrogen deposition alters the soil bacterial community structure but has little effect on fungal communities
作者：Zheng, Xiangzhou;Xu, Aiai;Wang, Huangping;Ding, Hong;Wu, Yiqun;Zhang, Yushu;Lin, Yan
关键词：Soil microbial community; N deposition; Potential function; Moso bamboo forest; Organic and mineral horizon
-
Unveiling the environmental and socioeconomic benefits of precision nitrogen management for paddy fields in subtropical China
作者：Zhang, Ke;Liu, Xiaojun;Cao, Qiang;Zhu, Yan;Cao, Weixing;Tian, Yongchao;Zhang, Ke;Liang, Xia;Zhang, Yushu;Chen, Deli;Zhang, Yushu
关键词：Precision agriculture; Optimized fertilizer management; Nitrogen use efficiency; Life cycle assessment
-
Response of Soil Microbial Communities and Functions to Long-Term Tea (Camellia sinensis L.) Planting in a Subtropical Region
作者：Zheng, Xiangzhou;Wu, Yiqun;Xu, Aiai;Lin, Cheng;Wang, Huangping;Yu, Juhua;Ding, Hong;Zhang, Yushu
关键词：soil microbial community; tea planting ages; microbial potential function; high-throughput sequencing
-
Enhancing Soil Nitrogen Retention Capacity by Biochar Incorporation in the Acidic Soil of Pomelo Orchards: The Crucial Role of pH
作者：Qian, Xiaojie;Chen, Hongmei;Yi, Zhigang;Li, Qinghua;Zhao, Lin;Wang, Fei;Zhang, Yushu;Zhang, Jinbo;Zhang, Jinbo;Mueller, Christoph;Mueller, Christoph;Mueller, Christoph;Mueller, Christoph
关键词：nitrogen retention capacity; soil pH; biochar incorporation; TM; TI; O-NH4
-
Controlling internal nitrogen and phosphorus loading using Ca-poor soil capping in shallow eutrophic lakes: Long-term effects and mechanisms
作者：Sun, Chuanzhe;Zhong, Jicheng;Yu, Juhua;Wen, Shuailong;Zhang, Lei;Yin, Hongbin;Fan, Chengxin;Pan, Gang;Mortimer, Robert J. G.;Pan, Gang;Yu, Juhua;Sun, Chuanzhe;Wen, Shuailong
关键词：Eutrophication; Internal nutrient loading; Capping; Ca-poor clean soil; Sediment-water interface; Shallow lakes
