Responses of Plant Community and Soil Properties to Inter-Annual Precipitation Variability and Grazing Durations in a Desert Steppe in Inner Mongolia

doi:10.1016/S2095-3119(13)60660-7

Journal of Integrative Agriculture ›› 2014, Vol. 13 ›› Issue (6): 1171-1182.DOI: 10.1016/S2095-3119(13)60660-7

Responses of Plant Community and Soil Properties to Inter-Annual Precipitation Variability and Grazing Durations in a Desert Steppe in Inner Mongolia

WANG Zhen, YUN Xiang-jun, WEI Zhi-jun, Michael P Schellenberg, WANG Yun-feng, YANGXia , HOU Xiang-yang

1、Grassland Research Institute, Chinese Academy of Agricultural Sciences, Hohhot 010010, P.R.China
2、Department of Grassland Science, College of Ecology and Environmental Science, Inner Mongolia Agricultural University, Hohhot 010018,
P.R.China
3、Semiarid Prairie Agricultural Research Center (SPARC), Agriculture and Agri-Food Canada, Swift Current S9H 3X2, Canada

收稿日期:2013-09-16 出版日期:2014-06-01 发布日期:2014-06-06
通讯作者: HOU Xiang-yang, Mobile: 13910026776, E-mail: houxy16@126.com
作者简介:WANG Zhen, Mobile: 13674743896, E-mail: wagnzhen0318@126.com
基金资助:
This study was financially supported by the National Basic Research Program of China (2014CB138801), the International Science & Technology Cooperation Program of China (2013DFR30760), the China Postdoctoral Science Foundation (2013M541096), the National Important Research Program of Inner Mongolia, China (2010ZD08) and the Central Nonprofit Research Institutes Fundamental Research Funds, China (1610332013015).

Responses of Plant Community and Soil Properties to Inter-Annual Precipitation Variability and Grazing Durations in a Desert Steppe in Inner Mongolia

WANG Zhen, YUN Xiang-jun, WEI Zhi-jun, Michael P Schellenberg, WANG Yun-feng, YANGXia , HOU Xiang-yang

1、Grassland Research Institute, Chinese Academy of Agricultural Sciences, Hohhot 010010, P.R.China
2、Department of Grassland Science, College of Ecology and Environmental Science, Inner Mongolia Agricultural University, Hohhot 010018,
P.R.China
3、Semiarid Prairie Agricultural Research Center (SPARC), Agriculture and Agri-Food Canada, Swift Current S9H 3X2, Canada

Received:2013-09-16 Online:2014-06-01 Published:2014-06-06
Contact: HOU Xiang-yang, Mobile: 13910026776, E-mail: houxy16@126.com
About author:WANG Zhen, Mobile: 13674743896, E-mail: wagnzhen0318@126.com
Supported by:
This study was financially supported by the National Basic Research Program of China (2014CB138801), the International Science & Technology Cooperation Program of China (2013DFR30760), the China Postdoctoral Science Foundation (2013M541096), the National Important Research Program of Inner Mongolia, China (2010ZD08) and the Central Nonprofit Research Institutes Fundamental Research Funds, China (1610332013015).

摘要/Abstract

摘要： Grazing can dramatically affect arid grassland communities that are very vulnerable to environmental changes due to its relatively short and sparse ground coverage, low biomass, sandy soil and inter-annual precipitation found in the desert steppe. The study investigates the effects of different grazing durations on vegetation and soil properties of a desert steppe community. The experiment was conducted in Xisu Banner in Inner Mongolia with five treatments: CG (continuous grazing), 40UG (40 d ungrazed), 50UG (50 d ungrazed), 60UG (60 d ungrazed) and UG (ungrazed). The biomass of both shrub and annual-biennial plant communities were significantly decreased by CG. Continuous grazing and 40UG significantly reduced the ANPP (aboveground net primary productivity) by the end of the three year study. 60UG treatment increased soil organic carbon (OC), total nitrogen concentration (TN) and total phosphorus concentration (TP) concentrations and 50UG increased the TN and total phosphorus concentration (TK) concentrations, whereas CG, 40UG and 50UG decreased soil OC, TP and available phosphorus concentration (AP) concentrations. The perennial plant species of the desert steppe were generally tolerant for grazing. The annual-biennial plant species had large variability in ANPP because of the inter-annual precipitation. Our results highlight that inter-annual precipitation variations could strongly modify the community responses to grazing in arid ecosystems.

关键词: ANPP , plant species , plant functional group , soil nutrient

Abstract: Grazing can dramatically affect arid grassland communities that are very vulnerable to environmental changes due to its relatively short and sparse ground coverage, low biomass, sandy soil and inter-annual precipitation found in the desert steppe. The study investigates the effects of different grazing durations on vegetation and soil properties of a desert steppe community. The experiment was conducted in Xisu Banner in Inner Mongolia with five treatments: CG (continuous grazing), 40UG (40 d ungrazed), 50UG (50 d ungrazed), 60UG (60 d ungrazed) and UG (ungrazed). The biomass of both shrub and annual-biennial plant communities were significantly decreased by CG. Continuous grazing and 40UG significantly reduced the ANPP (aboveground net primary productivity) by the end of the three year study. 60UG treatment increased soil organic carbon (OC), total nitrogen concentration (TN) and total phosphorus concentration (TP) concentrations and 50UG increased the TN and total phosphorus concentration (TK) concentrations, whereas CG, 40UG and 50UG decreased soil OC, TP and available phosphorus concentration (AP) concentrations. The perennial plant species of the desert steppe were generally tolerant for grazing. The annual-biennial plant species had large variability in ANPP because of the inter-annual precipitation. Our results highlight that inter-annual precipitation variations could strongly modify the community responses to grazing in arid ecosystems.

Key words: ANPP , plant species , plant functional group , soil nutrient

WANG Zhen, YUN Xiang-jun, WEI Zhi-jun, Michael P Schellenberg, WANG Yun-feng, YANGXia , HOU Xiang-yang. Responses of Plant Community and Soil Properties to Inter-Annual Precipitation Variability and Grazing Durations in a Desert Steppe in Inner Mongolia[J]. Journal of Integrative Agriculture, 2014, 13(6): 1171-1182.

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Responses of Plant Community and Soil Properties to Inter-Annual Precipitation Variability and Grazing Durations in a Desert Steppe in Inner Mongolia

Responses of Plant Community and Soil Properties to Inter-Annual Precipitation Variability and Grazing Durations in a Desert Steppe in Inner Mongolia

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