抚育间伐对塞罕坝地区云杉人工林碳储量及固碳速率的影响  

The effects of thinning on vegetation carbon storage and carbon fixation rate of spruce plantations in Saihanba area

作　　者：张乃暄 王韵頔 许中旗[1] 付立华 张菲 程顺 ZHANG Naixuan;WANG Yundi;XU Zhongqi;FU Lihua;ZHANG Fei;CHENG Shun(College of Forestry,Hebei Agricultural University,Baoding 071000,China;Saihanba Mechanical Forest Farm,Weichang 068450,China)

机构地区：[1]河北农业大学林学院,河北保定071000 [2]河北省塞罕坝机械林场总场,河北围场068466

出　　处：《河北农业大学学报》2022年第6期81-87,共7页Journal of Hebei Agricultural University

基　　金：承德国家可持续发展议程创新示范区建设科技项目(202008F025);国家重点研发计划项目(2019YFF0303203)。

摘　　要：为了探究抚育间伐对塞罕坝地区云杉(Piceameyeri)人工林碳储量及固碳速率的影响,为该地区云杉林的科学经营提供科学依据,对采取了不同抚育间伐强度的云杉人工林进行了调查,并建立了云杉的生物量回归模型,利用生物量回归模型计算了不同抚育间伐强度云杉林的生物碳储量和固碳速率。研究结果表明:云杉单株地上总生物量及各器官生物量模型以W=a(D^(2)H)b模型的均方根误差(RMSE)最低,决定系数最大,拟合效果最好;未抚育、低强度抚育和高强度抚育38年生云杉单株地上生物碳储量分别为14.39、19.42和32.64 kg,林分地上总生物碳储量则分别为44598.81、39070.99和36249.01 kg/hm^(2);林木单株生物碳储量主要集中于树干部分,占地上总生物碳储量的59.8%~74.3%;抚育间伐导致云杉枝、叶生物碳储量比例明显增加,而干生物碳储量比例明显降低;未抚育、低强度抚育和高强度抚育34年生云杉单株固碳速率分别为1.45、1.80和3.28 kg/年,38年生林分固碳速率则分别为4058.83、2908.00和3173.26kg/(hm^(2)·年)。抚育间伐会使云杉单株生物碳储量及固碳速率升高,使林分生物碳储量和固碳速率有所下降;同时,抚育间伐使得云杉生物碳储量的分配发生改变。In order to explore the effects of tending and thinning measures on the vegetation carbon storage and carbon fixation rate of spruce(Piceameyeri)plantation in Saihanba area,and provide scientific basis for management of spruce plantations in the area,investigation were performed on the spruce plantations under different tending and thinning intensities and the tree biomass regression equations of spruce were constructed to calculate the vegetation carbon storage and carbon fixation rate of the spruce plantations.The results showed that the W=a(D^(2)H)bmodel were better for the total biomass and organ biomass in the region.In the 38-year-old spruce plantations,the vegetation carbon storage of individual spruce tree was 14.39 kg in the non-thinning,19.42 kg in the low-intensity thinning and 32.64 kg in the high-intensity thinning plantations.The vegetation carbon storage was 44598.81 kg/hm^(2) in the non-thinning,39070.99 kg/hm^(2) in the low-intensity thinning and 36249.01 kg/hm^(2) in the high-intensity thinning spruce plantations.The tree vegetation carbon storage was mainly concentrated in the trunk that accounted for 59.8%-74.3%of the total biomass carbon storage.Thinning resulted in a significant increase of the proportion of vegetation carbon storage in the branches and leaves,and a significant decrease of vegetation carbon storage in the trunk.The carbon fixation rate of 34-year-old individual tree was 1.45 kg/a in the non-thinning,1.80 kg/a in the low-intensity thinning and 3.28 kg/a in the high-intensity thinning plantations,and the carbon fixation rate was 4058.83 kg/(hm^(2)·a)in the non-thinning,2908.00 kg/(hm^(2)·a)in the low-intensity thinning and 3173.26 kg/(hm^(2)·a)in the high-intensity thinning plantations of 38 years old.The thinning increased the vegetation carbon storage and carbon fixation rate of individual spruce,decreased the vegetation carbon storage and carbon fixation rate of spruce plantations,and changed the vegetation carbon storage allocation of spruce.

关 键 词：抚育间伐 云杉人工林 生物碳储量 固碳速率 

分 类 号：S791.18[农业科学—林木遗传育种]