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Effects of nitrogen, phosphorus and potassium addition on the productivity of a karst grassland: Plant functional group and community perspectives

文献类型：期刊论文

作者Liu, Changcheng; Liu, Yuguo3,4; Guo, Ke5; Qiao, Xianguo5; Zhao, Haiwei2; Wang, Shijie1,6; Zhang, Lin1,6; Cai, Xianli1,6
刊名ECOLOGICAL ENGINEERING
出版日期2018
卷号117页码:84-95
关键词Biomass Fertilization Karst grassland Nutrient limitation Nutrient stoichiometry Plant functional group
ISSN号0925-8574
DOI10.1016/j.ecoleng.2018.04.008
文献子类Article
英文摘要Rocky desertification is currently the most serious ecological and environmental problem in karst region of southwestern China. Its negative consequences for both natural ecosystems and the human inhabitants of the karst region have created a need for effective ecosystem restoration strategies, but success in these efforts has been limited. We hypothesized that scarcity of mineral nutrients could be a crucial factor in vegetation recovery, but relatively little information is available about the limiting roles of various mineral elements. We investigated responses of aboveground biomass and nutrient concentrations of a degraded karst grassland to nitrogen (N), Phosphorus (P) and Potassium (K) additions over a period of three years. Nutrient additions significantly increased aboveground biomass and nutrient concentrations for both the plant community and individual plant functional groups. Total aboveground biomass was significantly increased by N (by 35.6%), P (by 35.3%) and K (by 11.7%) fertilization over three years of nutrient additions. The interaction effects of year x N and year x P on total biomass were significant. Additions of N and P increased the biomass of grasses by 39.2% and 15.0%, respectively, and additions of P increased the biomass of forbs by 69.3%. The biomass of shrubs was significantly increased by P (by 111.3%), K (by 45.3%) and N (by 38.5%), and there were strong interaction effects of N, P and K on shrub biomass. P and K additions significantly increased the relative biomass of shrubs but decreased that of grasses, especially under the NPK treatment. Our results suggest that the productivity of degraded grassland in the karst region of China is co-limited by N, P and K, with N and P being the primary limiting factors. Among functional groups, grasses are mainly limited by N and P, forbs by P, and shrubs by all 3 elements, with P being the most limiting factor overall. Mineral fertilization stimulates plant growth and may be a useful tool in efforts to restore woody vegetation in degraded grasslands, thus counteracting the process of rock desertification in the karst region of southwestern China.
学科主题Ecology ; Engineering, Environmental ; Environmental Sciences
出版地AMSTERDAM
电子版国际标准刊号1872-6992
WOS关键词N-P RATIOS ; NUTRIENT LIMITATION ; SOUTHWEST CHINA ; CALCAREOUS GRASSLAND ; ELEVATED CO2 ; PATTERNS ; FOREST ; SHRUBS ; REGION ; SOIL
语种英语
WOS记录号WOS:000432518400008
出版者ELSEVIER SCIENCE BV
资助机构National Key Research and Development Program of China [2016YFC0502602] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41373081, 31500583] ; National Key Basic Research Program of ChinaNational Basic Research Program of China [2013CB956701] ; Chinese Academy of SciencesChinese Academy of Sciences [XDA05070400] ; Fundamental Research Funds for the Central Non-profit Research Institution of CAF [CAFYBB2014ZD006, CAFYBB2016QB020]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/20431]  
专题植被与环境变化国家重点实验室
作者单位1.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Guizhou, Peoples R China
2.Chinese Acad Sci, Puding Karst Ecosyst Res Stn, Puding 562101, Peoples R China
3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
4.Chinese Acad Forestry, Inst Desertificat Studies, Beijing 100091, Peoples R China
5.Yunnan Jianshui Karst Ecosyst Res Stn, Jianshui 654300, Peoples R China
6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
7.Binzhou Univ, Shandong Prov Key Lab Ecoenvironm Sci Yellow Rive, Binzhou 256603, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Changcheng,Liu, Yuguo,Guo, Ke,et al. Effects of nitrogen, phosphorus and potassium addition on the productivity of a karst grassland: Plant functional group and community perspectives[J]. ECOLOGICAL ENGINEERING,2018,117:84-95.
APA Liu, Changcheng.,Liu, Yuguo.,Guo, Ke.,Qiao, Xianguo.,Zhao, Haiwei.,...&Cai, Xianli.(2018).Effects of nitrogen, phosphorus and potassium addition on the productivity of a karst grassland: Plant functional group and community perspectives.ECOLOGICAL ENGINEERING,117,84-95.
MLA Liu, Changcheng,et al."Effects of nitrogen, phosphorus and potassium addition on the productivity of a karst grassland: Plant functional group and community perspectives".ECOLOGICAL ENGINEERING 117(2018):84-95.

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来源：植物研究所

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