择伐

天然林择伐作业技术探讨

Techniques of selective cutting in natural forest

择伐干扰后长白山区天然次生林物种多样性的变化

Changes in Species Diversity of Natural Secondary Forests after Selective Cutting Disturbance in Changbai Mountain

30%、50%择伐强度经营5个月后林地土壤C储量分别比原始林降低4.5%和5.3%，但30%强度经营林地土壤C/N接近未采伐的原始林。

Five months later after felling tropical montane rainforest by the intensity of 30 % and 50 % , the soil carbon storage declined by 4.5 % and 5.3 % respectively compared with the previous virgin tropical forest .

以标准地M10为应用实例构建红松天然林择伐空间优化模型，计算得出该林分经过择伐后，目标函数值有明显提高。

Taking Plot M10 as an example , selection cutting spatial optimization model of natural Korean pine forest was established and the value of objective function was greatly improved .

强度择伐和极强度择伐10a后林地凋落物及其养分含量仍未恢复，弱度择伐和中度择伐则与未采伐林地比较接近。

Biomass of forest litter and total nutrient contents in high and over-high intensity selective cutting sites have not been recovered after 10 years , while that in low and medium intensity selective cutting sites were close to that of uncutting areas .

文中提出了一种修正参数预测模型（MPPM）和线性规划方法相结合对于林分进行生长预测和择伐模拟研究的方法。

A method of the integration of one modified parameter prediction model ( MPPM ) and one linear programming method was proposed to be used for predicting and simulating standing stock growths and selective cuttings of uneven-aged stands .

天然林择伐经营技术的应用研究

Study of Applications of Selective Cutting Management Techniques in Natural Forests

福建省天然林择伐研究

A Study on the Selection Felling of Natural Forests in Fujian Province

低强度择伐伐区林道网合理密度的研究

Study on the density of forestry road network for selective cutting system

优化择伐提高林地经济效益的研究

Study on selection method to improve the economic effect of forest land

森林择伐基本理论综述与分析

Review and Analysis on Basic Theory of Forest Selection Cutting

林分择伐空间结构优化模型研究

Study on Spatial Structure Optimizing Model of Stand Selection Cutting

林分状态与择伐技术指标的关系

Relationship between Stand State and Technical Index of Selection Cutting

择伐对林地土壤物理性质影响及作业技术

Impact on Soil Physical Properties by Selective Cutting and Logging Operation Technology

阔叶红松林择伐强度及更新技术的研究

Study on the selective cutting intensity and generation techniques of broad-leaved korean forests

现实异龄林分最优择伐序列的探讨

Optimum Sequence of Selective Cutting for Actural Uneven-aged Stand

这些道路把择伐和随后的皆伐联系在了一起。

The roads are the link between selectively logging a forest then clearing it .

红松阔叶林择伐后早春植物物种及多样性变化研究

On the Change of Species and Biodiversity of Early-spring Herbs in Broad-leaved Korean Pine Forest

实行择伐林冠下红松人工更新改造阔叶低产林的研究

Studies on the planting of Pinus koraiensis under the canopy of selective felled broadleaved stands

谈影响择伐强度的因素

The factors impacting selective cutting intensity

择伐对林地土壤呼吸影响若干问题的研究

The Study of Some Problems about Effects of Selective Cutting on Soil Respiration of Forest Land

从择伐、林分改造和更新3方面研究提出了可持续经营管理技术。

Sustainable techniques are advanced based on researches of selective cutting , improvement pure plantation and regeneration .

在择伐设计中适当保留林窗周围的林木，一般能避免对原有空间格局的改变。

Reserving the trees around forest gaps in selection cutting design may reserve the original spatial pattern .

择伐作业对常绿阔叶林乔木层树种结构及物种多样性的影响

Effects of selective cutting of different intensities on the tree layer structure and species diversity of evergreen broadleaved forest

甘肃省洮河林区云杉、冷杉林择伐周期的调查研究

An investigation on the selective cutting cycle of Picea and Abies forests in Taohe forest region of Gansu Province

枯落层厚度：保留带、择伐林地高于皆伐林地。

The litter thickness of select cutting areas and reserved zone are higher than that of clear cutting areas .

结果表明：保留木的损伤与采伐木的胸径及择伐强度有关。

The results show that : the damage to standing timber is related to DBH and the selection cutting intensities .

择伐区域随后被完全砍伐的可能性最高是从未被砍伐的森林的4倍。

The probability of deforestation for a selectively logged area was up to four times greater than for intact forests .

基于多元回归分析油锯择伐作业对保留木损伤率影响的探讨

A Study on the Damage Rate of Residual Trees Caused by Chainsaw Selective Felling Operations Based on Multiple Regression Analysis

速效钾质量分数：皆伐林地高于择伐林地及保留带；

Mass fraction of the quick potassium of clear cutting area are higher than that of selected cutting areas and the reserved zone ;