Responses of Plant Functional Group Traits and Nutritional Quality to Fencing in an Alpine Meadow

doi:10.11733/j.issn.1007-0435.2021.Z1.024

Acta Agrestia Sinica ›› 2021, Vol. 29 ›› Issue (S1): 208-217.DOI: 10.11733/j.issn.1007-0435.2021.Z1.024

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Responses of Plant Functional Group Traits and Nutritional Quality to Fencing in an Alpine Meadow

YAO Xi-xi¹, XIAO Feng², QI Shou-zhong³, CHEN Guo-ming⁴, WANG Li-ya⁵, YAN Zhen-ying⁵, ZHANG Wen-juan⁵, SUN Hai-qun¹

1. College of Agriculture and Animal Husbandry, Qinghai University, Xining, Qinghai Province 810016, China;
2. Qinghai Province Wetland Protection Center, Qinghai University, Xining, Qinghai Province 810008, China;
3. Huzhu Tu Autonomous County of Animal Husbandry and Veterinary Station, Haidong, Qinghai Province 810500, China;
4. Qinghai grassland improvement experimental station, Xining, Qinghai Province 810008, China;
5. Natural Resources Comprehensive Investigation and Monitoring Institute of Qinghai Province, Xining, Qinghai Province 810001, China

Received:2021-03-10 Revised:2021-04-27 Online:2021-10-30 Published:2021-11-17

高寒草甸植被群落特征及其营养品质对围栏封育的响应

姚喜喜¹, 肖锋², 祁守忠³, 陈国明⁴, 王立亚⁵, 严振英⁵, 张文娟⁵, 孙海群¹

1. 青海大学农牧学院, 青海西宁 810016;
2. 青海省湿地保护中心, 青海西宁 810008;
3. 互助土族自治县畜牧兽医站, 青海海东 810500;
4. 青海省草原改良试验站, 青海西宁 810008;
5. 青海省自然资源综合调查监测院, 青海西宁 810001

通讯作者: 孙海群,E-mail:haiqunsun@163.com
作者简介:姚喜喜(1989-),男,甘肃庆阳人,博士,讲师,主要从事反刍动物营养学与草地生态学交叉学科相关的研究,E-mail:18993075304@163.com
基金资助:
青海大学科研启动费资金项目（41510406）资助

Abstract

Abstract: In order to explore the effects of long-term fencing on inter-annual dynamics of plant functional group traits and nutrientional quality in an alpine meadow, we took 11-year fenced and continuously grazed alpine meadow as the study area by combining 3-year continuous field investigation and indoor forage nutritional quality analysis. The effects of long-term fencing and continuous grazing on 5 plant functional group traits and nutritional quality were compared, and then. The results showed that, the coverage and aboveground biomass of Grass group (GG), Sedge group (SG), Leguminous group (LG) and Forbs group (FG) in the fenced area were significantly higher than those in the grazing plot (P<0.05), while functional group density, species richness index, Shannon-Wiener index, Crude protein (CP) and In vitro dry matter digestibility (IVDMD) were significantly lower than those of the grazing plots (P<0.05). The density, species richness index, Shannon-Wiener index, CP and IVDMD of 4 functional groups were not affected by inter-annual rainfall without a gradually decreased trend in the fenced plot. Thus, it suggested that the appropriate grazing should be carried out in the 11-year fenced field to increase the species diversity and nutritional quality of herbage in the alpine meadow.

Key words: Long-term fencing, Alpine meadow, Plant functional group, Community characteristics, Nutritional quality

摘要： 为探究长期封育对高寒草甸植被功能群落特征和营养品质年际动态的影响，本研究以围封11年和连续放牧高寒草甸为研究对象，采用3年连续野外群落调查和室内牧草营养品质分析相结合的方法，比较了长期围封和连续放牧2种草地管理措施对5个植被功能群特征和营养品质的影响。结果表明：围封样地禾本科（Grass group，GG）、莎草科（Sedge group，SG）、豆科（Leguminous group，LG）和杂类草（Forbs group，FG）4个功能群盖度和地上生物量显著高于放牧样地（P<0.05），功能群密度、物种丰富度指数、Shannon-Wiener指数、粗蛋白（Crude protein，CP）和体外干物质消化率（In vitro dry matter digestibility，IVDMD）显著低于放牧样地（P<0.05）；围封样地4个功能群的密度、群物种丰富度指数、Shannon-Wiener指数、CP和IVDMD表现出不受年际降雨量影响而逐渐下降的趋势。研究建议对围封11年的高寒草甸可进行适当的放牧以增加植被功能群物种多样性和牧草营养品质。

关键词: 长期围封, 高寒草甸, 植被功能群落, 群落特征, 营养品质

CLC Number:

Q948.15

YAO Xi-xi, XIAO Feng, QI Shou-zhong, CHEN Guo-ming, WANG Li-ya, YAN Zhen-ying, ZHANG Wen-juan, SUN Hai-qun. Responses of Plant Functional Group Traits and Nutritional Quality to Fencing in an Alpine Meadow[J]. Acta Agrestia Sinica, 2021, 29(S1): 208-217.

姚喜喜, 肖锋, 祁守忠, 陈国明, 王立亚, 严振英, 张文娟, 孙海群. 高寒草甸植被群落特征及其营养品质对围栏封育的响应[J]. 草地学报, 2021, 29(S1): 208-217.

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Responses of Plant Functional Group Traits and Nutritional Quality to Fencing in an Alpine Meadow

高寒草甸植被群落特征及其营养品质对围栏封育的响应

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