欧美107杨人工林间伐成效初探  

A Preliminary Study on the Thinning Effect of Populus×euramericana Plantation

作　　者：王百千 王鑫[2,3] 刘春鹏 刘四围[1] 李向军 李新利 WANG BAI-Qian;WANG-Xin;LIU Chun-peng;LIU Si-wei;LI Xiang-jun;LI Xin-li(Wenan Forestry Bureau,Wenan,Hebei 065800,China;Hebei Academy of Forestry Sciences,Shijiazhuang,Hebei 050061,China;Hebei Engineering Research Center for Trees Varieties,Shijiazhuang,Hebei 050061,China)

机构地区：[1]文安县林业局,河北文安065800 [2]河北省林业科学研究院,河北石家庄050061 [3]河北省林木良种工程技术研究中心,河北石家庄050061

出　　处：《河北林业科技》2018年第1期7-10,17,共5页Journal of Hebei Forestry Science and Technology

基　　金：河北省林业科学技术研究项目"毛白杨缓苗期形成机理及缩短缓苗期关键技术"(1602477);河北省省属科研院所奖励性后补助项目"河北省杨树良种选育及集约经营技术研究"(15256817H)

摘　　要：为了提高杨树人工林过密林分的经济效益,该研究以欧美107杨(Populus×euramericana)为研究对象,以株行距为3m×2m的林分为例,进行了不同间伐时间和间伐配置的试验(间伐强度为50%),并对其生长情况及经济效益进行了调查与分析。结果表明:(1)3m×2m林分在造林后第2年生长受到抑制,于第5年开始显著下降。(2)间伐时间能够显著影响林分的胸径、单株材积和单位面积蓄积,一般间伐时间越早越有利于林分生长;间伐配置对林分生长影响不显著,但表现出品字配置略优于矩形配置。(3)间伐时间能够显著影响林分经济效益,但未表现出明显的规律性;间伐配置对林分经济效益影响不显著,但表现出品字配置略大于矩形配置。各间伐处理中以造林后第3年品字间伐配置净收益最大,为(25973±2256)元/hm^2,比不间伐林分(CK)提高了27.4%。因此,建议对于3m×2m林分,于造林后第3年采用品字配置进行间伐。In order to increase the economic benefit of the dense stand about poplar plantation,this study took Populus×euramericana as the research object,took the stand with 3m×2m density planting as an example,the experiment on thinning time and thinning configuration were conducted(the thinning intensity was 50%),and the growth and the economic benefit were investigated and analyzed.The results showed that:(1)the growth of the stand with 3m×2m density planting was inhibited in the second year after afforestation,and decreased significantly in the fifth year.(2)Thinning time had significant effect on the DBH,individual volume and unit stock volume,the earlier the thinning time is generally more beneficial to the growth;Thinning configuration had no significant effect on the growth,but it showed that triangle configuration be better than rectangular configuration.(3)Thinning time had significant effect on the economic benefit,but it did not showed obvious regularity;Thinning configuration had no significant effect on the economic benefit,but it showed that triangle configuration be higher than rectangular configuration.The net earning of the stand thinned with triangle configuration in the third year after afforestation was the most in all treatments,was 25973±2256 yuan/hm2,improved by 27.4%compared with the unthinned stand(CK).Therefore,it was suggested that the stand with 3m×2m density planting should be thinned with triangle configuration in the third year after afforestation.

关 键 词：间伐 欧美107杨 造林密度 经济效益 单株材积 

分 类 号：S792.11[农业科学—林木遗传育种]