森林与环境学报2026，Vol.46Issue(2)：187-194,8.DOI:10.13324/j.cnki.jfcf.202509004
抚育措施下杨柴植物功能性状的变异与权衡
Variations and trade-offs in plant functional traits of Hedysarum mongolicum under tending practices
摘要
Abstract
To clarify the effects of different tending measures(stumping,shallow tillage with weeding)on the plant functional traits of Hedysarum mongolicum in the Mu Us Sandy Land,and to reveal the regulatory mechanisms by which these measures promote the regeneration and revitalization of degraded Hedysarum mongolicum shrublands,this study investigated the responses and variation trade-offs of Hedysarum mongolicum to tending measures from the perspective of plant functional traits in the Mu Us Sandy Land.The results are expected to provide a basis for the precision management of desert shrublands and support ecological construction in the typical windbreak and sand-fixation regions of the Three-North Shelterbelt Forest Program.A plantation of Hedysarum mongolicum in the Mu Us Sandy Land was used as the experimental subject.Three treatments-control(no tending),stumping,and shallow tillage with weeding-were established.Sixteen plant functional traits were measured,including the stem-to-leaf ratio,leaf dry matter content,and leaf carbon content.The results indicated that tending measures increased the plant height and specific leaf area(P<0.05),promoting the preferential allocation of resources to photosynthetic organs.Concurrently,tending measures increased the leaf nitrogen content while decreasing the leaf C/N ratio,enhancing the nitrogen assimilation capacity and thereby promoting the growth of plants.The morphological traits of Hedysarum mongolicum exhibited high plasticity and variability,whereas the element traits were conserved.The stumping treatment was characterized by a regeneration-driven strategy,facilitating rapid allocation of carbon and nitrogen resources to new shoots.In contrast,the shallow tillage with weeding treatment favored a resource optimization strategy,significantly enhancing leaf carbon assimilation and nitrogen uptake.In conclusion,the tending measures shift the ecological strategy of Hedysarum mongolicum from a conserved survival strategy to an adaptive strategy characterized by high photosynthetic investment-rapid nutrient turnover,thereby driving the regeneration and revitalization of the degraded stand.关键词
毛乌素沙地/抚育/杨柴/植物功能性状/可塑性Key words
Mu Us Sandy Land/tending/Hedysarum mongolicum/plant functional traits/plasticity分类
农业科技引用本文复制引用
王铮,李卓凡,杨海峰,刘辰明,海龙,胡永宁..抚育措施下杨柴植物功能性状的变异与权衡[J].森林与环境学报,2026,46(2):187-194,8.基金项目
内蒙古自治区林业科学研究院科研能力提升"揭榜挂帅"项目"三北工程典型区域生态效益评估与治理空间格局优化"(2024NLTS01). （2024NLTS01）
