Vegetation restoration by seasonal exclosure in the Kerqin Sandy Land, Inner Mongolia
Vegetation restoration by seasonal exclosure in the Kerqin Sandy Land, Inner Mongolia
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DOI：
10.1023/a:1009719604815
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发表时间：
1998-12-01
期刊：
影响因子：
1.7
通讯作者：
Kou, ZW
中科院分区：
文献类型：
--
作者：
Katoh, K;Takeuchi, KI;Kou, ZW
据报告，控制放牧对于控制半干旱地区的荒漠化是有效的。然而，经济原因往往使完全禁止放牧（完全围封）难以进行。在中国内蒙古科尔沁桑迪，通过季节性围封的方式控制放牧，即从11月到Apt-ii允许放牧。在9月至10月期间也允许收获干草一次。报告的研究的目的是评估这种季节性封闭对植被恢复的有效性。物种组成数据来自356个样方和协调的去趋势对应分析（DCA）。排序结果表明，地形是影响植被物种组成的最重要因素。无论地形和类型的放牧控制，然而，植被覆盖度，植被高度和物种丰富度较高的放牧已控制的网站，比网站缺乏任何控制。前者以多年生植物为主，后者以一年生植物为主。在实施了季节性围封的地点，灌木和趾类植物都很稀少。结论是，季节性围封是足够的恢复和维持草地植被和周围的研究区。当需要灌木或树木植被来固定沙子或防止沙丘再移动时，建议完全封闭。
Grazing control has been reported to be effective for the control of desertification in semi-arid regions. However, economic reasons often make complete inhibition of grazing (complete exclosure) difficult to carry out. Grazing control has been applied to the Kerqin Sandy Lands, Inner Mongolia, China, by means of seasonal exclosure, whereby grazing is allowed from November to Apt-ii. The harvesting of hay is also allowed once during September - October. The aim of the reported study was to evaluate the effectiveness of this seasonal exclosure on vegetation restoration. Species compositional data were obtained from 356 quadrats and ordinated by Detrended Correspondence Analysis (DCA). Ordination indicated that landform was the most important factor influencing the species composition of the vegetation. Regardless of landform and type of grazing control, however, vegetation coverage, vegetation height and species richness were higher at sites where grazing had been controlled, than at sites lacking any control. Perennial species were dominant at the former while annual species were dominant at the latter. Both shrub and toe species were quits rare at the sites where seasonal exclosure had been carried out. It is concluded that seasonal exclosure is sufficient to restore and maintain grassland vegetation in and around the study area. When shrubby or tree vegetation is needed for reasons such as fixing sands or preventing sand dune remobilization, complete exclosure is recommended.