| 放牧对贵南县4种退化指示植物叶片性状的影响 |
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| 引用本文： | 王娅琳,朱文琰,侯将将,高巧静,赵新全,徐世晓,孙平.放牧对贵南县4种退化指示植物叶片性状的影响[J].草业科学,2020(3):423-431. |
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| 作者姓名： | 王娅琳 朱文琰 侯将将 高巧静 赵新全 徐世晓 孙平 |
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| 作者单位： | 河南科技大学动物科技学院;河南科技大学林学院;中国科学院西北高原生物研究所 |
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| 基金项目： | “十二五”国家科技支撑计划项目(2014BAC05B04-04);青海省重点研发与转化计划项目“贵南黑藏羊产业提质增效关键技术研发与集成示范”(219-NK-173)。 |
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| 摘 要： | 本研究以青海省贵南县高寒草甸4种退化指示植物为研究对象,分析放牧干扰对叶片碳(C)、氮(N)、磷(P)含量及其化学计量特征、叶干物质含量和比叶面积的影响,探讨高寒草甸生态系统中退化植物对环境变化的响应和适应策略。结果表明,4种植物叶片碳、氮、磷含量及化学计量比随放牧强度增加表现为碳含量不变,氮、磷含量上升、化学计量比(C/N、C/P及N/P)下降的变化趋势,且重度放牧后,植物生长受氮元素限制。放牧强度改变显著影响4种植物叶片性状(P<0.01),且对叶片磷含量的影响最大(P<0.001);物种对比叶面积影响最大(P<0.001),且在不同植物间表现出物种差异性。即放牧强度增加时,4种植物叶片均表现出养分储存增加,但植物比叶面积的变化更多表现出物种特异性。
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| 关 键 词： | 退化指示植物 叶片功能型性状 叶片结构型性状 放牧 |
Effects of grazing on leaf traits of four degraded indicator plants in Guinan |
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| WANG Yalin,ZHU Wenyan,HOU Jiangjiang,GAO Qiaojing,ZHAO Xinquan,XU Shixiao,SUN Ping.Effects of grazing on leaf traits of four degraded indicator plants in Guinan[J].Pratacultural Science,2020(3):423-431. |
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| Authors: | WANG Yalin ZHU Wenyan HOU Jiangjiang GAO Qiaojing ZHAO Xinquan XU Shixiao SUN Ping |
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| Institution: | (College of Animal Science and Technology,Henan University of Science and Technology,Luoyang 471003,Henan,China;Forestry College,Henan University of Science and Technology,Luoyang 471003,Henan,China;Northwest Institute of Plateau Biology Chinese Academy of Sciences,Xining 810008,Qinghai,China) |
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| Abstract: | To study the response and adaptation strategies of degraded plants to environmental changes,the effect of grazing disturbance on leaf carbon,nitrogen and phosphorus content and their stoichiometric characteristics,leaf dry matter content,and specific leaf area were analyzed in four degraded indicator plants in the alpine meadow ecosystem of Guinan County,Qinghai.The results showed that the carbon,nitrogen,and phosphorus content and their stoichiometric ratio in the leaves of the four species showed a trend of unchanged carbon content,increased nitrogen and phosphorus content,and decreased stoichiometric ratio(C/N,C/P,and N/P)with the increase of grazing intensity.Furthermore,the growth of plants was limited by nitrogen after heavy grazing.The interaction showed that the change in grazing intensity significantly affected the leaf traits of the four plants(P<0.01),and had the greatest impact on leaf phosphorus content(P<0.001).In addition,specific leaf area was the most affected by species,showing species differences among different plants.It was suggested that the four plants showed a trend of increased nutrient storage as grazing intensity increased,but the regulation of specific leaf area showed species specificity. |
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| Keywords: | degraded indicator plant leaf functional traits leaf structural traits grazing |
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