Clearcutting

Clearcutting and cluster shape selective cutting has a great influence on the growth of the artificial introduced trees of the several management measures , it promotes the growth of the seedlings . ( 4 ) Different management measures have different effects on the change of undergrowth plant diversity .

皆伐和群团状择伐对栽植乔木的影响较大，促进了幼苗的生长。（4）不同的经营措施对林下植物多样性的变化也有不同的影响。

The main reasons were that lands of clearcutting and fire had been regenerated and closed .

主要原因是针叶原始林的皆伐迹地和火烧迹地都已天然更新成林。

In this paper , time , methods ( clearcutting trees in upper layers and selective cutting trees in upper layers ), seasons and intervals of tending and thinning in upper layers for the first time were put forward .

文章提出了首次上层抚育间伐时间、间伐方法（皆伐上层林木、择伐上层林木）、间伐季节、间伐间隔期等。

Whereas after clearcutting average soil water content and soil water storage capacity were found to reduce 6.1 % and 29.51 % respectively , while yearly runoff and runoff coefficient of flood peak increased about 13.42 % and 29.63 % respectively .

林地皆伐后，土壤含水量与贮水能力分别下降6.1%和29.51%，而年径流量和洪峰径流系数分别增加了13.42%和29.63%。