2021年3月6日 星期六
不同林龄千年桐人工林的碳含量和碳储量及碳库分配格局
Carbon content, carbon storage and distribution pattern of carbon pool of Vernicia montana plantation with different stand ages
2021年 第30卷 第1期 页码[9-16]
摘要


为了明晰福建省千年桐(Vernicia montana Lour.)人工林碳储量的变化规律及碳库分配格局,采用空间代替时间的方式,对南平市林龄2、3、5、7和9 a的千年桐人工林乔木层(包括树干、树枝、树叶和树根)、灌木层、草本层、凋落物层及0~100 cm土层的碳含量和碳储量及其所占比例进行了比较,并对各林分的总碳储量及分配格局进行了分析。结果表明:林龄2 a的林分中树根碳含量最高(584.63 g·kg-1),树叶碳含量略低;林龄3、5和9 a的林分中树干碳含量最高,分别为536.34、406.44和636.95 g·kg-1;林龄7 a的林分中树干、树枝、树叶和树根的碳含量差异较小。并且,林龄2、3和9 a的林分中乔木层碳含量最高,分别为537.68、467.77和529.35 g·kg-1。各土层碳含量的平均值为11.30~21.42 g·kg-1,总体上随林龄增长而升高。各林分的总碳储量为105.60~214.60 t·hm-2,总体上随林龄增长而升高。各林分的植被层碳储量为23.89~85.13 t·hm-2,占总碳储量的17.27%~39.67%,其中,乔木层、灌木层、草本层和凋落物层的碳储量分别为21.11~75.78、0.96~2.46、0.27~0.56和1.55~6.33 t·hm-2,分别占总碳储量的14.60%~35.31%、0.72%~1.14%、0.22%~0.26%和1.46%~2.95%。各林分的土壤碳储量为81.71~129.47 t·hm-2,占总碳储量的60.34%~82.74%。随林龄增长,除林龄2 a的林分外,其余林龄林分的土壤碳储量占总碳储量的比例降低,而植被层碳储量占总碳储量的比例却升高。综上所述,千年桐人工林碳储量分配比例从大到小依次为土壤、乔木层、凋落物层、灌木层、草本层,且总碳储量总体上随林龄增长而升高。

Abstract

 In order to clarify the change law of carbon storage and the distribution pattern of carbon pool of Vernicia montana Lour. plantation in Fujian Province, the carbon content, carbon storage and its proportion in arbor layer (containing trunk, branch, leaf and root), shrub layer, herb layer, litter layer and 0-100 cm soil layer of V. montana plantation with stand age of 2, 3, 5, 7 and 9 a in Nanping City were analyzed by using space instead of time, and the total carbon storage and distribution pattern of each stand were analyzed. The results show that the carbon content in root of stand with stand age of 2 a is the highest (584.63 g·kg-1), that in leaf is slightly lower; the carbon content in trunk of stands with stand age of 3, 5 and 9 a is the highest, which is 536.34, 406.44 and 636.95 g·kg-1, respectively; the difference in carbon content in trunk, branch, leaf and root of stand with stand age of 7 a is small. In addition, the carbon content in arbor of stands with stand age of 2, 3 and 9 a is the highest, which is 537.68, 467.77 and 529.35 g·kg-1, respectively. The average carbon content in each soil layer is 11.30-21.42 g·kg-1, and generally increases with the increase of stand age. The total carbon storage of each stand is 105.60-214.60 t·hm-2, and generally increases with the increase of stand age. The carbon storage of vegetation layer of each stand is 23.89-85.13 t·hm-2, accounting for 17.27%-39.67% of the total carbon storage, in which, the carbon storage of arbor, shrub, herb and litter layers is 21.11-75.78, 0.96-2.46, 0.27-0.56 and 1.55-6.33 t·hm-2, respectively, accounting for 14.60%-35.31%, 0.72%-1.14%, 0.22%-0.26% and 1.46%-2.95% of the total carbon storage, respectively. The carbon storage of soil of each stand is 81.71-129.47 t·hm-2, accounting for 60.34%-82.74% of the total carbon storage. With the increase of stand age, except for stand with stand age of 2 a, the proportion of carbon storage of soil in total carbon storage of stands with other stands decreases, while that of carbon storage of vegetation layer in total carbon storage increases. In summary, the distribution proportion of carbon storage of V. montana plantation from big to small is soil, arbor layer, litter layer, shrub layer, herb layer, and the total carbon storage generally increases with the increase of stand age.

关键词千年桐; 林龄; 碳含量; 碳储量; 分配格局
Key wordsVernicia montana Lour.; stand age; carbon content; carbon storage; distribution pattern
作者洪滔1, 何晨阳1, 黄贝佳1, 陈灿1, 李键1, 林晗1, 吴承祯2
所在单位1. 福建农林大学林学院, 福建 福州 350002; 2. 武夷学院, 福建 南平 354300
点击量124
基金项目国家“十三五”国家重点研发计划项目(2017YFD0601304)