摘要
为给樟树(Camphora officinarum)用材林高效培育提供技术支撑,以约8年生樟树人工林为研究对象,采用双因素完全随机区组设计,探究樟树幼林生长对疏伐和施肥的响应。分别设置3个疏伐和施肥处理,分别为0疏伐强度(保留密度2500株/公顷)、1/4疏伐强度(保留密度1875株/公顷)和1/2疏伐强度(保留密度1250株/公顷)及200、400和600克/株施肥量;疏伐1次,连续施肥3年;测定处理后第1~3年的胸径、树高和冠幅,计算单株材积和林分蓄积。结果表明,疏伐对樟树幼林胸径、冠幅和单株材积各年增长量和总增长量均影响显著,这些指标均随疏伐强度增加呈上升趋势。疏伐对树高总增长量影响不显著。疏伐对林分蓄积总增长量影响显著,该指标随疏伐强度增加呈下降趋势,在1/4和1/2疏伐强度下均显著低于0疏伐强度,1/4与1/2疏伐强度差异不显著。施肥对胸径、树高、冠幅、单株材积和林分蓄积总增长量均影响显著,这些指标均随施肥量增加呈上升趋势,且均在400克/株与600克/株施肥量下差异不显著。疏伐和施肥对樟树幼林的早期生长有一定影响,适宜樟树幼林生长的处理组合为保留密度1250株/公顷和施肥400克/株。
In order to provide technical support for efficient cultivation of Camphora officinarum timber forests,taking about 8-year-old C.officinarum plantation as object,growth responses of C.officinarum young plantation to thinning and fertilization were explored by two factor randomized complete block design.Tree thinning treatments and three fertiliztion treatments were set,including 0 thinning intensity(retention density 2500 plant/hm2),1/4 thinning intensity(retention density 1875 plant/hm2)and 1/2 thinning intensity(retention density 1250 plant/hm2),and 200,400 and 600 g/plant fertilization amounts.After one thinning and continuous fertilization for 3 years,DBHs,tree heights and crown widths were measured at the first,second and third years,and individual volumes and stand volumes were calculated.Results showed that thinning had significant effects on annual growths and total growths of DBH,crown width and individual volume of C.officinarum young plantation,which showed increasing trends with increase of thinning intensity.Thinning had no significant effect on total growth of tree height.Thinning had significant effect on total growth of stand volume,which showed decreasing trend with increase of thinning intensity,and were significantly lower in 1/4 and 1/2 thinning intensities than in 0 thinning intensity.Total growths of stand volumes between 1/4 and 1/2 thinning intensities had no significant difference.Fertilization had significant effects on total growths of DBH,tree height,crown width,individual volume and stand volume,which showed increasing trends with increase of fertilization amount,and these indexes had no significant differences between fertilization amounts of 400 g/plant and 600 g/plant.Thinning and fertilization had certain effects on early growth of C.officinarum young plantation,and suitable treat ment combination for growth of C.officinarum young plantation was retention density of 1250 plant/hm2 and fer tilization amount of 400 g/plant.
作者
刘新亮
温世钫
张月婷
何小三
郑永杰
伍艳芳
章挺
Liu Xinliang;Wen Shifang;Zhang Yueting;He Xiaosan;Zheng Yongjie;Wu Yanfang;Zhang Ting(Camphor Engineering and Technology Research Center of National Forestry and Grassland Administration,Jiangxi Academy of Forestry,Nanchang,Jiangxi 330013,China)
出处
《广西林业科学》
2024年第5期603-609,共7页
Guangxi Forestry Science
基金
江西省林业科学院基础研究与人才科研专项(2023522702)
国家重点研发计划项目(2016YFD0600605)。
关键词
生长表现
疏伐强度
施肥
樟树
幼林
growth performance
thinning intensity
fertilization
Camphora officinarum
young plantation
