鄂西日本落叶松人工林碳储量成熟龄研究  

Determination of peak age of carbon storage in Larix kaempferi plantations in Western Hubei

作　　者：赵虎[1,2] 杜超群 袁慧[1] 冯骏 许业洲 ZHAO Hu;DU Chaoqun;YUAN Hui;FENG Jun;XU Yezhou(Hubei Academy of Forestry,Wuhan,Hubei 430079,China;Working Station for National Forest Farm of Hubei Province,Wuhan,Hubei 430079,China;Jianshi County State-owned Changlinggang Forest Farm,Jianshi,Hubei 445300,China)

机构地区：[1]湖北省林业科学研究院,湖北武汉430079 [2]湖北省国有林场工作站,湖北武汉430079 [3]建始县国有长岭岗林场,湖北建始445300

出　　处：《森林与环境学报》2023年第2期132-138,共7页Journal of Forest and Environment

基　　金：国家自然科学基金项目“耦合遗传效应和环境变量的落叶松林分生长模型研究”(31971652)。

摘　　要：为研究鄂西山区日本落叶松人工林林分碳储量变化规律并确定碳储量成熟龄,利用8~41年生日本落叶松人工林87个标准地和249株样木树干生物量测定数据,以建立的单木树干生物量估算方程为基础,利用生物量扩展因子和碳系数推算出各林分单位面积碳储量,构建林分碳储量预估方程。结果表明:该区域日本落叶松人工林平均单株树干生物量为85.334 kg(2.694~395.214 kg),以胸径或树高为变量的一元和二元方程对单木树干生物量的拟合优度均在0.9以上,而二元方程拟合优度和精度更高;林分平均单位面积碳储量为77.465 t·hm^(-2)(4.573~172.512 t·hm^(-2)),其中单位面积碳储量为60~120 t·hm^(-2)的样地占总样地数的64.4%;利用Richards、Korf和Compertz 3个模型对林分碳储量进行预估,林分碳储量及其平均和连年碳积累量均十分相近,其中最大连年碳积累量和最大平均碳积累量分别为6.2和3.9 t·hm^(-2)左右,峰值林龄分别为13~15 a和23 a。Richards、Gompertz模型适于鄂西山区日本落叶松人工林碳储量的预估,该区域日本落叶松林分在中幼林(林龄15 a前)为碳的快速积累期,23 a为碳储量成熟龄。To study the changes in carbon storage and determine the peak age of carbon storage in Larix kaempferi plantations in western Hubei mountains,trunk biomass data of 87 standard plots and 249 sample trees aged 8-41 years were used.The biomass estimation equation of a single tree trunk was established,the carbon storage per unit area of each stand was calculated based on the biomass expansion factor and carbon coefficient,and the carbon storage prediction equation of the stand was established.The results showed that the average stem biomass per plant in L.kaempferi plantations in this region was 85.334 kg(2.694-395.214 kg).The goodness-of-fit of the univariate and binary equations with diameter at breast height(DBH)or tree height as variables for the growth of single tree trunks was above 0.9,and the binary equation had higher goodness-of-fit and accuracy.The average carbon storage per unit area of the stand was 77.465 t·hm^(-2)(4.573-172.512 t·hm^(-2)),and the plots with 60 to 120 t·hm^(-2)accounted for 64.4%of all the plots.Three models of Richards,Korf,and Gompertz were used to estimate the carbon storage of the stand,and it was found that the carbon storage of the stand and its average and continuous annual carbon accumulation were very similar.The maximum continuous annual carbon accumulation and maximum average carbon accumulation were approximately 6.2 and 3.9 t·hm^(-2),respectively,and the peak ages were 13-15 a and 23 a,respectively.Richards and Gompertz models were suitable for the prediction of carbon storage of L.kaempferi in western Hubei mountains.The carbon accumulation period was rapid in the middle and young stands(before 15 years),and the 23rd year was the peak age of carbon storage.

关 键 词：日本落叶松 人工林 生物量 碳储量 成熟龄 

分 类 号：S722.83[农业科学—林木遗传育种]