围栏封育对新疆山地退化草原植物群落特征的影响
发布时间：2019-06-27 15:47
【摘要】：围栏封育作为一种有效的退化草原管理措施,近年来在我国退化草原恢复中得到极为广泛的应用。以新疆巴里坤县退化温性荒漠草原为研究对象,通过连续4 a围栏封育样地和自由放牧样地的植被调查资料,对比分析围栏封育样地和自由放牧样地的植被群落组成和地上生物量的动态特征。结果表明:(1)通过围栏封育措施,退化草原的物种多样性和群落生态优势度与自由放牧样地相比略有提高,群落均匀度略有降低,但通过t检验,差异均未达到显著水平(P0.05)。(2)随着封育措施的实施,总体上草原群落优势种为沙生针茅和伊犁绢蒿,反映出西部内陆半干旱地区温性荒漠草原特有的特征;自由放牧样地,沙生针茅和伊犁绢蒿在群落中的优势地位发生变化。(3)围栏封育措施提高了植物群落的平均高度、地上生物量。随着围封时间的延长,群落地上生物量增加,且显著高于自由放牧区,然而4 a围栏封育并不能使温性荒漠草原产草量达到最高水平,也不能使植物群落的多样性指标与自由放牧样地形成显著差异。
[Abstract]:As an effective management measure of degraded grassland, fencing has been widely used in the restoration of degraded grassland in China in recent years. Based on the vegetation investigation data of fenced closed plots and free grazing plots in Balikun County, Xinjiang, the dynamic characteristics of vegetation community composition and above ground biomass between fenced closed plots and free grazing plots were compared and analyzed. The results showed that: (1) through fencing measures, the species diversity and community ecological dominance of degraded grassland were slightly higher than those of free grazing plots, and the community uniformity was slightly decreased, but through t test, the difference did not reach a significant level (P 0.05). (2). With the implementation of enclosure measures, the dominant species of grassland community were Scutellaria rubra and Artemisia annua. It reflects the unique characteristics of warm desert steppe in the inland semi-arid area of western China. The dominant position of Elaeagnus angustifolia and Artemisia annua in the community changed. (3) the average height and above-ground biomass of the plant community were increased by fencing measures. With the prolongation of enclosure time, the biomass on the ground of the community increased, and it was significantly higher than that of the free grazing area. However, 4-year fencing could not make the grass yield reach the highest level, nor could it make the diversity index of the plant community significantly different from that of the free grazing sample plot.
【作者单位】： 新疆哈密市草原工作站;新疆巴里坤县草原工作站;
【基金】：新疆巴里坤2008年退牧还草项目资助
【分类号】：S812
，
本文编号：2506930
[Abstract]:As an effective management measure of degraded grassland, fencing has been widely used in the restoration of degraded grassland in China in recent years. Based on the vegetation investigation data of fenced closed plots and free grazing plots in Balikun County, Xinjiang, the dynamic characteristics of vegetation community composition and above ground biomass between fenced closed plots and free grazing plots were compared and analyzed. The results showed that: (1) through fencing measures, the species diversity and community ecological dominance of degraded grassland were slightly higher than those of free grazing plots, and the community uniformity was slightly decreased, but through t test, the difference did not reach a significant level (P 0.05). (2). With the implementation of enclosure measures, the dominant species of grassland community were Scutellaria rubra and Artemisia annua. It reflects the unique characteristics of warm desert steppe in the inland semi-arid area of western China. The dominant position of Elaeagnus angustifolia and Artemisia annua in the community changed. (3) the average height and above-ground biomass of the plant community were increased by fencing measures. With the prolongation of enclosure time, the biomass on the ground of the community increased, and it was significantly higher than that of the free grazing area. However, 4-year fencing could not make the grass yield reach the highest level, nor could it make the diversity index of the plant community significantly different from that of the free grazing sample plot.
【作者单位】： 新疆哈密市草原工作站;新疆巴里坤县草原工作站;
【基金】：新疆巴里坤2008年退牧还草项目资助
【分类号】：S812
，
本文编号：2506930
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