摘要
以科尔沁沙地榆树疏林草原为研究对象,分析放牧和围封处理下,榆树周围草本植物的多度、密度、高度、盖度、重要值以及综合优势比的变化.结果表明:围封后榆树疏林林下草本植物的总密度没有显著差别,平均高度和总盖度显著高于放牧地,且所有草本植物的高度与放牧地比较均显著增加(p<0.05).围封样地内大部分物种的重要值和综合优势比均高于放牧地,蒺藜在围封地内的综合优势比显著高于放牧地(p<0.05).生物量与植物总盖度和植物平均高度均呈现显著的正相关性(p<0.05).因此,围封有利于草地生态的恢复,是遏制草地退化的有效措施之一,能够促进沙质草地的恢复演替.
Taking the Ulmus sparse forest steppe in the Horqin Sandy Land as the research object,this study analyzed the changes in abundance,density,height,coverage,important value(IV)and summed dominance ratio(SDR)of herbaceous plants around Ulmus trees under grazing and enclosure treatments.The results showed that there was no significant difference in the total density of herbaceous plants under the Ulmus sparse forest after enclosure,while the average height and total coverage were significantly higher than those in the grazing area(p<0.05).The IV and SDR of most species in the enclosed plots were higher than those in the grazing area,and the SDR of Tribulus terrestris in the enclosed plots was significantly higher than that in the grazing area.Biomass showed a significant positive correlation with both total plant coverage and average plant height(p<0.05).Therefore,shortterm enclosure facilitates the recovery of herbaceous community structure and biomass in degraded sandy grasslands,demonstrating its effectiveness as a restoration measure.
作者
樊俊言
孙德帅
吕依静
申玉华
郭颖
李晓兰
Fan Junyan;Sun Deshuai;Lv Yijing;Shen Yuhua;Guo Ying;Li Xiaolan(School of Resources and Environment,Yili Normal University,Yining,Xingjiang 835000,China;School of Chemistry and Life Sciences,Chifeng University,Chifeng,Neimenggu 024000,China;Institute of Resources and Ecology,Yili Normal University,Yining,Xingjiang 835000,China)
出处
《伊犁师范大学学报(自然科学版)》
2025年第4期42-51,共10页
Journal of Yili Normal University(Natural Science Edition)
基金
新疆维吾尔自治区“天池英才”创新领军人才计划项目(2025CXLJ005)
内蒙古自治区青年科技英才项目(NJYT22118)
伊犁师范大学高层次人才项目(2023RCYJ07).
关键词
围封
榆树疏林草原
草本植物
重要值
enclosure
Ulmus sparse forest
herbaceous plants
important value
