Influence of Different Mowing Systems on Community Characteristics and the Compensatory Growth of Important Species of the Stipa grandis Steppe in Inner Mongolia

Zhiqiang Wan, Jiuyan Yang, Rui Gu, Yan Liang, Yulong Yan, Qingzhu Gao and Jie Yang
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Zhiqiang Wan: School of Life Sciences, Inner Mongolia University, No. 235, University West Road, Huhhot 010021, Inner Mongolia, China
Jiuyan Yang: School of Life Sciences, Inner Mongolia University, No. 235, University West Road, Huhhot 010021, Inner Mongolia, China
Rui Gu: School of Life Sciences, Inner Mongolia University, No. 235, University West Road, Huhhot 010021, Inner Mongolia, China
Yan Liang: Key Laboratory for Agro-Environment & Climate Change of Ministry of Agriculture, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Yulong Yan: School of Life Sciences, Inner Mongolia University, No. 235, University West Road, Huhhot 010021, Inner Mongolia, China
Qingzhu Gao: Key Laboratory for Agro-Environment & Climate Change of Ministry of Agriculture, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Jie Yang: School of Life Sciences, Inner Mongolia University, No. 235, University West Road, Huhhot 010021, Inner Mongolia, China

Sustainability, 2016, vol. 8, issue 11, 1-11

Abstract: The Stipa grandis steppe is a type of steppe in the Central Asian sub-region, and it is an important resource for livestock production in China. Mowing is one of the main management methods for this steppe. Verifying the response of the Stipa grandis steppe communities to different mowing frequencies is essential for the rational utilization of pastures and the protection and recovery of natural steppe. In this study, we investigated the community characteristics and compensatory growth of important species of the Stipa grandis steppe community under four mowing frequencies (TAY: twice a year; OAY: once a year; OTY: once every other year; NM: no mowing/enclosure), and found that different frequencies of mowing significantly influenced the community characteristics and the compensatory growth of dominant plant species. In the enclosure, species density was significantly lower, and height and biomass were significantly greater than in the mowing treatments. At the beginning of the growing season, mowing had a significant impact on the individual miniaturization of Stipa grandis , Leymus chinensis , and Anemarrhena asphodeloides . Mowing also had a significant impact on the diversity of the community. The Shannon diversity index, the Pielou evenness index, and the richness index were higher under OTY than other mowing frequencies. Under different mowing frequencies, growth rates were significantly different after the aboveground portions were cut, while the levels of biomass were not significantly different. Stipa grandis , Leymus chinensis , and Anemarrhena asphodeloides had less compensatory height growth under OAY compared to the other treatments; however, there were no significant differences in the relative growth rates of the three species under different treatments. Stipa grandis exhibited equivalent compensatory height growth; both Leymus chinensis and Anemarrhena asphodeloides exhibited over-compensatory growth. Based on the results of community characteristics and the compensatory growth of the dominant species, mowing every other year is currently the most practical mowing system.

Keywords: mowing frequency; community characteristics; diversity; individual miniaturization; compensatory growth (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2016
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