株行距对杨树人工林的冠层结构、生物量和树干圆满度的影响

为了提高杨树人工林的生产能力和木材质量，研究了4种种植间距对杨树人工林郁闭度、生物量和树干圆度的影响。种植行距影响人工林的冠层特征，进而影响林下植被和人工林生产力。林下植被生物量和Shannon-Wiener指数与叶面积指数呈负相关，但林下植被多样性指数和地上生物量在林间距离越宽的林下越高。树直径生长随种植间距的增加而增加,而正方形配置(5×5 m和6×6米)高于长方形配置(3×8米和4.5×8米)。8年生时5×5 m株行距的杨树生物量最高。正方形配置的杨树树干圆满度优于长方形配置。

To improve the productivity and wood quality of poplar plantations, the effects of four planting spacings on canopy closure, biomass, and stem roundness of poplar plantations were investigated. Planting row spacing affects the canopy characteristics of plantations, which in turn influences understory vegetation and plantation productivity. Both understory vegetation biomass and the Shannon-Wiener Index were negatively correlated with Leaf Area Index (LAI), while understory vegetation diversity index and aboveground biomass were higher in stands with wider inter-row distances. Tree diameter growth increased with increasing planting spacing, and square configurations (5×5 m and 6×6 m) outperformed rectangular configurations (3×8 m and 4.5×8 m). At the age of 8 years, poplar plantations with a 5×5 m planting spacing exhibited the highest biomass. Square planting configurations yielded better stem roundness in poplars than rectangular configurations.

搜集汇总

背景与挑战

背景概述

该数据集研究了四种种植间距对杨树人工林冠层结构、生物量和树干圆满度的影响，旨在提升人工林的生产力和木材质量。研究发现，正方形配置（如5×5米）在树木生长、生物量积累和树干圆满度方面优于长方形配置，且林下植被多样性随行距增加而提高。