Abstract: In order to study the effects of different cutting intensities on vegetation restoration in sandy land,vegetation (Agropyron cristatum L. Gaertn.、Artemisia desertorum Spreng.、Hedysarum scoparium Fisch.etc.) was selected as the research object in the southern margin of the Tengger Desert in 14-year-old exclosure (natural restoration) and 14-year-old enclosure (6-year-old artificial restoration + 8-year-old natural restoration). Experiments with different cutting intensities showed that:for natural restoration sandy land,moderate cutting could improve sandy vegetation height and regeneration capacity,and the total biomass of the vegetation in turn was moderate cutting (17.70 kg·m^-2) > no cutting (15.84 kg·m^-2) > severe cutting (5.56 kg·m^-2). Artificial + natural restoration sandy land,moderate cutting had significant differences in plant height and regeneration capacity with severe cutting and no cutting,and the biomass in turn was not cutting 18.87 kg·m^-2,moderate cutting 13.87 kg·m^-2,severe cutting 11.34 kg·m^-2. Severe cutting had no significant effects on the sandy vegetation height and regeneration capacity in the two restoration patterns.

Key words: Cutting intensity, Enclosing sandy land, Sandy vegetation, Vegetation characteristic

摘要： 为研究不同刈割强度对沙地植被恢复的影响，在我国腾格里沙漠南缘选取封育14年（自然恢复）和封育14年（人工恢复6年+自然恢复8年）沙地植被（冰草Agropyron cristatum L.Gaertn.、沙蒿Artemisia desertorum Spreng.、花棒Hedysarum scoparium Fisch.等）作为研究对象，进行不同刈割强度的实验（重度刈割留茬5 cm；中度刈割草本植物留茬10 cm、木本植物留茬15 cm；不刈割），结果表明：对于自然恢复沙区，中度刈割能提高其沙地植被的株高和再生能力，其植被累计生物量依次为中度刈割（17.70 kg·m^-2） > 不刈割（15.84 kg·m^-2） > 重度刈割（5.56 kg·m^-2）；人工+自然恢复沙区，中度刈割对其植被的株高和再生能力与重度刈割、不刈割存在显著差异，其生物量依次为不刈割18.87 kg·m^-2、中度刈割13.87 kg·m^-2、重度刈割11.34 kg·m^-2；重度刈割对这两种恢复模式的沙地植被的株高和再生能力均无显著作用。

关键词: 刈割强度, 封育沙地, 沙区植被, 植被特征