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开敞度调控对次生林林冠下红松径高生长量和地上生物量的影响
作者姓名:Shen HL  Cong J  Zhang P  Zhang Q  Fan SH  Yang WH  Liu SR
作者单位:1. 东北林业大学林学院林木遗传育种国家重点实验室,哈尔滨,150040
2. 中国林业科学研究院林业研究所,北京,100091
3. 国际竹藤网络中心,北京,100102
4. 中国林业科学研究院森林生态环境与保护研究所,北京,100091
基金项目:林业公益性行业科研专项(201104070); “十一五”国家科技支撑计划项目(2006BAD03A04); 科技部农业科技成果转化资金项目(2007GB24320427); 吉林省博士后科研项目资助
摘    要:以同处于演替层15年生(龄级Ⅰ)和22年生(龄级Ⅱ)的人工红松-天然阔叶混交林为对象,对林下栽植红松个体的开敞度(K)进行调整(K=1.0,1.5,2.0),研究调整后4年间林下红松直径和树高生长量及第4年的红松生物量状况.结果表明:2个龄级红松地径/胸径和树高定期生长量和地上部生物量均以K=1.0处理最大;随时间的延伸,K=1.5和K=2.0处理对年生长量的促进效果不断增强,接近或超过K=1.0处理.龄级Ⅰ的K=1.0处理的树干生物量比例显著高于其他处理和对照,而龄级Ⅱ各处理的差异不明显;龄级Ⅰ各处理的枝叶生物量比值均显著高于对照,而龄级Ⅱ则差异不显著;两个龄级不同年龄针叶的比例及分布状态不同.开敞度为1.0 ~2.0时有利于次生林林冠下栽植的15 ~22年生红松的生长发育.

关 键 词:红松  开敞度  量化调控  径高生长量  生物量

Effect of opening degree regulation on diameter and height increment and aboveground biomass of Korean pine trees planted under secondary forest
Shen HL,Cong J,Zhang P,Zhang Q,Fan SH,Yang WH,Liu SR.Effect of opening degree regulation on diameter and height increment and aboveground biomass of Korean pine trees planted under secondary forest[J].Chinese Journal of Applied Ecology,2011,22(11):2781-2791.
Authors:Shen Hai-Long  Cong Jian  Zhang Peng  Zhang Qun  Fan Shao-Hui  Yang Wen-Hua  Liu Shi-Rong
Institution:SHEN Hai-long1,CONG Jian1,ZHANG Peng1,ZHANG Qun2,FAN Shao-hui3,YANG Wen-hua1,LIU Shi-rong4(1State Key Laboratory of Forest Genetics and Tree Breeding,School of Forestry,Northeast Forestry University,Harbin 150040,China,2Research Institute of Forestry,Chinese Academy of Forestry,Beijing 100091,3International Centre for Bamboo and Rattan,Beijing 100102,4Research Institute of Forest Ecology,Environment and Protection,China)
Abstract:Taking mixed forest of artifical Pinus koraiensis and natural broad-leaved trees as test material, among which the P. koraiensis was 15 (stage I) and 22 (stage II) years old respectively, and was in the same succession layer, the height and diameter increment during 4 years experimental period and the aboveground biomass (AGB) at the 4th experimental year for P. koraiensis were measured in the opening degree (K = 1.0, 1.5, 2.0) regulation experiment. The periodic increment of basal diameter (BD)/diameter at breast height (DBH), tree height and AGB of P. koraiensis trees were highest in the opening degree K = 1.0 treatment. The opening degree K = 1.5 and K = 2.0 treatments promoted the annual increment of P. koraiensis, with the effect increased along with the experimental period elongation and approached or exceeded that of K = 1.0 treatment. The stem biomass proportion of P. koraiensis trees was significantly higher in K = 1.0 treatment than that in the other treatments and the control in stage I, but no significant difference among treatments was found in stage II. The ratio of branch to needle biomass in all opening degree treatments was also significantly higher than that in control in stage I, but no significant difference in stage II. The proportion and distribution of needles in different ages differed in the two stages. It was concluded that opening degrees of 1.0-2.0 were all suitable for the growth of P. koraiensis of 15-22 years old trees planted under secondary forest.
Keywords:Pinus koraiensis  opening degree  quantitative regulation  diameter and height increment  biomass    
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