初植密度对退耕还林工程中刺槐造林的影响研究  

Effect of Initial Planting Density on Afforestation of Robinia pseudoacacia in the Project of Returning Farmland to Forest

作　　者：郭鲁雷 岳宗杰 耿玉军 Guo Lulei;Yue Zongjie;Geng Yujun(Natural Resources and Planning Bureau of Shen County,Liaocheng 252430,Shandong,China;Shen County State owned Forest Farm Management Service Center,Liaocheng 252430,Shandong,China)

机构地区：[1]聊城市莘县自然资源和规划局,山东聊城252430 [2]聊城市莘县国有林场管理服务中心,山东聊城252430

出　　处：《绿色科技》2024年第9期143-146,共4页Journal of Green Science and Technology

摘　　要：分析了初植密度对退耕还林工程中刺槐造林的影响,旨在为退耕还林项目实施提供借鉴和指导。选择莘县某刺槐林基地为研究区域,设置不同的初植密度,分别为833、1111、1350、1667株/hm^(2),分析不同初植密度对刺槐林生存率和长势的影响。结果表明:不同初植密度影响刺槐林的成活率和病害率,D3处理的成活率高于其他处理,病害率低于其他处理;D3处理的树高、胸径和冠幅高于其他处理,比较为:D3>D4>D2>D1;D3处理1350株/hm^(2)初植密度下的草本层和灌木层物种数量多于其他初植密度组,D3处理的灌木层物种数量和草本层物种数量分别是D4、D3、D1处理的2.33倍、2.33倍和1.75倍以及2倍、1.67倍和1.25倍。初植密度大时小径级木所占比例较大,而初植密度小时,大径级木所占比例较大。D3处理1350株/hm^(2)初植密度下的林木径阶分布相对均衡,林分总蓄积量相对较高。在本试验条件下,初植密度对刺槐林的生长有不同程度的影响,初植密度小对大径级木影响比较大,初植密度设置为1350株/hm^(2),林木径阶分布更为均衡,因此应合理预设初植密度,确保林木径阶适宜,促进刺槐健康生长,提高林分总蓄积量。当然,在具体设置初植密度选择时,也要兼顾研究地气候和土壤条件,在保证刺槐造林效果的同时,也提高了退耕还林工程总体效益。This paper analyzes the effect of initial planting density on the afforestation of Robinia pseudoacacia in the project of returning farmland to forest,so as to provide a reference and guidance for the implementation of the project.A Robinia pseudoacacia base in Xinxian county was selected as the study area,and different initial planting densities were set,which were 833 hm^(2),1111 hm^(2),1350 hm^(2)and 1667 hm^(2),respectively,to analyze the effects of different initial planting densities on the survival rate and growth of Robinia pseudoacacia.The survival rate and disease rate of Robinia pseudoacacia were affected by different initial plant density.The survival rate and disease rate of D3 treatment were higher than other treatments,and lower than other treatments.The tree height,DBH and crown width of D3 treatment were higher than those of other treatments,showing a trend of D3>D4>D2>D1.The number of species in shrub layer and shrub layer under the initial plant density of 1350 plants/hm^(2)was more than that in other initial plant density groups.The number of species in shrub layer and shrub layer under D3 treatment was 2.33 times,2.33 times and 1.75 times,and the number of species in herb layer under D4,D3 and D1 treatment was 2 times,1.67 times and 1.25 times,respectively.When the initial planting density is high,the proportion of small-diameter trees is larger,while when the initial planting density is low,the proportion of large-diameter trees is larger.Under the initial planting density of 1350 hm^(2)treated with D3,the distribution of tree diameter and rank was relatively balanced,and the total stand stock was relatively high.Under the conditions of this experiment,the initial plant density has different degrees of influence on the growth of Robinia pseudoacacia,and the small initial plant density has greater influence on the large-diameter trees.The initial plant density is set to 1350hm^(2),and the distribution of tree diameter and rank is more balanced.Therefore,the initial plant density should be rat

关 键 词：初植密度 刺槐林 退耕还林 生长情况 土壤指标 

分 类 号：S725[农业科学—林木遗传育种]