tree species composition index 树种组成指数
mixed tree species composition 混交树种组成
tree species composition table 树种组成指数表
"74/76") as the research object. By the method of improved biomass based on tree composition and pipeline model theory,this paper calculated the biomass and carbon storage of poplar plantation,which had important practical significance.
本研究以北京大兴地区集约栽培欧美107杨(Populus×euramericana cv.“74/76”)为研究对象,采用基于树体结构和管道模型理论的改进生物量法推算杨树人工林的生物量和碳储量,对于准确估测其碳汇作用具有重要现实意义。
参考来源 - 基于树体结构推算杨树人工林生物量及碳储量·2,447,543篇论文数据，部分数据来源于NoteExpress
Shifts in forest species composition ramify through the ecosystem in many ways because tree species have different, often unique properties.
由于树种具有不同的、往往是独特的特性，森林物种组成的变化以多种方式影响着生态系统。
Long-term effects are primarily mediated by changes in tree species composition and the consequent alterations of forest structure, productivity, and nutrient uptake.
长期影响主要是由树种组成的变化以及随之而来的森林结构、生产力和养分吸收的变化所导致的。
Citrus fruits, which normally ripen on the tree and contain no starch, undergo little change in carbohydrate composition following harvest.
在果树上正常成熟且不含淀粉的柑桔类水果，其碳水化合物组成在摘下后很少变化。
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