| 不同载畜率下荒漠草原非生长季植物群落特征对近地面风沙通量的影响 |
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| 引用本文： | 倪芳芳,吕世杰,屈志强,白璐,孟彪,张博涵,李治国.不同载畜率下荒漠草原非生长季植物群落特征对近地面风沙通量的影响[J].草业学报,2022,31(3):26-33. |
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| 作者姓名： | 倪芳芳 吕世杰 屈志强 白璐 孟彪 张博涵 李治国 |
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| 作者单位： | 内蒙古农业大学草原与资源环境学院，草地资源教育部重点实验室，内蒙古 呼和浩特 010019 |
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| 基金项目： | 国家自然科学基金;内蒙古自然基金项目;内蒙古自治区科技成果转化项目;内蒙古自治区硕士研究生科研创新项目;内蒙古自治区科技计划项目 |
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| 摘 要： | 以短花针茅为建群种的内蒙古荒漠草原为研究对象，在长期梯度放牧试验和风蚀监测实验的平台上，通过对2018-2019年非生长季风蚀物及植物群落特征（植物群落高度、盖度、枯落物量）的调查，开展了不同载畜率下近地表高度的风沙通量与植物群落特征关系的研究，结果表明：在荒漠草原非生长季，1）载畜率的增加会加剧土壤风蚀，尤其显著增加集沙高度10 cm（即距地表最近的高度）和0~50 cm的总风沙通量。对于0~50 cm高度的总风沙通量来说，对照区的风沙通量最低，轻度放牧区和中度放牧区的风沙通量分别是对照区的1.29和1.81倍，重度放牧区的风沙通量最高，是对照区的2.20倍；2）不同载畜率下，植物群落特征对风沙通量有显著影响，风沙通量与植物群落高度、盖度和枯落物量均呈负相关关系，其中植物群落高度对不同集沙高度的风沙通量影响最大；3）载畜率显著影响植物群落特征，载畜率的增加使植物群落高度、盖度及枯落物量降低，进而增加草地风蚀量。
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| 关 键 词： | 荒漠草原 载畜率 风沙通量 植物群落特征 |
| 收稿时间： | 2020-12-30 |
| 修稿时间： | 2021-04-19 |
Effects of vegetation characteristics of desert steppe in the non-growing season on near-surface dust flux under different stocking rates |
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| NI Fang-fang,LV Shi-jie,QU Zhi-qiang,BAI Lu,MENG Biao,ZHANG Bo-han,LI Zhi-guo.Effects of vegetation characteristics of desert steppe in the non-growing season on near-surface dust flux under different stocking rates[J].Acta Prataculturae Sinica,2022,31(3):26-33. |
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| Authors: | NI Fang-fang LV Shi-jie QU Zhi-qiang BAI Lu MENG Biao ZHANG Bo-han LI Zhi-guo |
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| Institution: | Key Laboratory of Grassland Resources，Ministry of Education，College of Grassland，Resources and Environment，Inner Mongolia Agricultural University，Hohhot 010019，China |
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| Abstract: | The objective of this research was to study the relationship between plant community characteristics and dust flux at different near-surface heights under different stocking rates， in a Stipa breviflora desert steppe research area. The research utilized plots established as part of a long-term differential grazing and wind erosion monitoring experiment. Ungrazed （CK）， and light， moderate and heavy grazing intensities were included in the experiment. Aeolian soil were collected using “BSNE” samplers （as described by Fryrear in a 1986 publication and subsequently in the international literature）， and the plant community characteristics （plant community height， vegetation cover and litter weight） were researched in the 2018-2019 non-growing season. The results were as follows， 1） Wind erosion was significantly exacerbated by increased stocking rate， especially the dust flux at 10 cm height and the total dust flux for 0-50 cm height. For the total dust flux for 0-50 cm height， the dust flux of CK was the lowest， the dust flux of lightly， moderately and heavily grazed treatments were， respectively， 1.29， 1.81 and 2.20 times that of the CK treatment. 2） The plant community characteristics had a significant impact on the dust flux， plant community height， vegetation cover and litter weight were all negatively correlated with the dust flux. In particular， the plant community height had the greatest influence on dust flux across the range of height strata sampled. 3） The stocking rate significantly affected the characteristics of the vegetation， and with increased stocking rate， plant community height， vegetation cover and and litter weight were all reduced， which in turn increased the wind erosion of the desert steppe grassland in the non-growing season. |
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| Keywords: | desert steppe stocking rate dust flux plant community characteristics |
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