不同恢复措施对新疆伊犁退化草地植被特征及多样性的影响
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第三次新疆综合科学考察项目“新疆重要草地生产力现状调查及提升潜力评估”(2022xjkk0403)


Influence of different restoration measures on vegetation characteristics and diversity of degraded grasslands in Ili, Xinjiang
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    摘要:

    [目的] 分析围栏封育、补播和禁牧3种恢复措施对新疆伊犁不同类型退化草地植被特征与多样性的影响,为伊犁退化草地植被恢复和区域畜牧业可持续发展提供科学依据。[方法] 以新疆伊犁退化草地为研究对象,选取22个样区开展实地调查,设置自由放牧区为对照,分析围栏封育、补播、禁牧3种措施对山地草甸、低地草甸、温性草甸、温性荒漠草原、高寒草甸、高寒草原6类草地的植被恢复效果。[结果] ①围栏封育后,6类草地的植被高度、盖度、地上生物量和凋落物生物量分别增加66%,50%,48%和52%,辛普森指数等多样性指标显著提升(p<0.05);补播后群落植被盖度、地上生物量及辛普森指数分别显著增加57%,70%和10%(p<0.05);禁牧后山地草甸的植物种类、群落植被盖度和地上生物量分别显著增加32%,51%和29%(p<0.05)。②围栏封育对温性荒漠草原恢复响应最突出,其辛普森指数、植物种类、群落盖度和地上生物量增幅均高于其他草地类型;补播对高寒草甸生产力提升效果最优,地上生物量和植被盖度增幅显著高于温性荒漠草原;禁牧仅在山地草甸表现出短期恢复效应。③退化草地植被特征与多样性指数间存在显著关联性,地上生物量与凋落物生物量、植被盖度呈极显著正相关(p<0.01),地上生物量、群落植被盖度、凋落物生物量和植物种类分别与裸地面积呈显著负相关(p<0.05)。④ 3种恢复措施对伊犁退化草地恢复均有效果,其中补播是提升群落植被盖度和地上生物量的最有效措施。[结论] 围栏封育、补播、禁牧均可显著促进新疆伊犁退化草地植被恢复,且不同措施的恢复效果存在草地类型特异性,补播提升群落生产力效果最优。

    Abstract:

    [Objective] The restoration effects of three measures: fenced enclosure, reseeding and grazing prohibition, on the vegetation characteristics and diversity of different types of degraded grasslands in Ili, Xinjiang were analyzed in order to provide a scientific basis for vegetation restoration of degraded grasslands and sustainable development of regional animal husbandry in Ili. [Methods] Taking the degraded grasslands in Ili, Xinjiang as the research objects, 22 sample plots were selected for field investigation, with free grazing areas serving as the control. The vegetation restoration effects of fenced enclosure, reseeding, and grazing prohibition on six grassland types-mountain meadow, lowland meadow, temperate meadow, temperate desert steppe, alpine meadow, and alpine steppe-were analyzed. [Results] ① After fenced enclosure, vegetation height, coverage, aboveground biomass, and litter biomass of the six grassland types increased significantly by 66%, 50%, 48%, and 52%, respectively, and diversity indices such as the Simpson index also showed significant increases(p<0.05). After reseeding, community vegetation coverage, aboveground biomass, and the Simpson index increased significantly by 57%, 70%, and 10%, respectively(p<0.05). After grazing prohibition, plant species, community vegetation coverage, and aboveground biomass of the mountain meadow increased significantly by 32%, 51%, and 29%, respectively(p<0.05).② Fenced enclosure showed the most prominent restoration response in the temperate desert steppe, with increases in the Simpson index, plant species, community coverage, and aboveground biomass all higher than those in other grassland types. Reseeding had the optimal effect on improving productivity in the alpine meadow, with increases in aboveground biomass and vegetation coverage significantly higher than those in the temperate desert steppe. Grazing prohibition only exhibited short-term restoration effects in the mountain meadow.③ Significant correlations were found between vegetation characteristics and diversity indices of degraded grasslands. Aboveground biomass was extremely significantly positively correlated with litter biomass and vegetation coverage(p<0.01), while aboveground biomass, community vegetation coverage, litter biomass, and plant species were significantly negatively correlated with bare land area(p<0.05).④ All three restoration measures were effective for restoring degraded grasslands in Ili, among which reseeding was the most effective measure for improving community vegetation coverage and aboveground biomass. [Conclusion] Fenced enclosure, reseeding, and grazing prohibition can significantly promote the vegetation restoration of degraded grasslands in Ili, Xinjiang, and the restoration effects of different measures are specific to grassland types. Reseeding has the best effect on improving community productivity.

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郑雨,姚慧芳,马秀枝,王敏怡,晁开瑞,马雅楠,林姝婧,吴昊.不同恢复措施对新疆伊犁退化草地植被特征及多样性的影响[J].水土保持通报,2026,46(2):111-120,145

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  • 收稿日期:2025-07-27
  • 最后修改日期:2025-11-18
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  • 在线发布日期: 2026-05-13
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