风的扰动主要包括风速、频率等的变化，并受不同林木密度和复杂地形下的风场分布的影响。
The disturbance of wind mainly means the variety of speed and frequency of wind, and it's affected by forest density and the distribution of wind field under complex landform.
判定低质低效林的依据是林分的结构、林木个体质量、密度和郁闭度、灌木林结构和功能。
Forest structure, individual quality, tree density and crown density, and structure and function of brush forest are used to construct a criterion to the LQBF.
选择林分密度指数(SDI)作为反映林分中林木之间平均拥挤指标。
Stand density index (SDI) was applied as a quantitative index to measure mean crowd degree between trees.
应用推荐