森林与环境学报2024，Vol.44Issue(3)：242-249,8.DOI:10.13324/j.cnki.jfcf.2024.03.003
株行距配置和无性系对杨树人工林碳储量的影响
Effects of planting spacing configurations and clones on carbon storage in poplar plantations
摘要
Abstract
To understand the effects of clones and planting spacing on carbon storage in poplar plantations,the impacts of four planting spacings(6 m×6 m,4.5 m×8.0 m,5 m×5 m,and 3 m×8 m)for NL-895 and 6 m×6 m spacing for two clones(NL-95,and NL-797)on carbon storage in the plantations were investigated using the direct harvesting of forest biomass method.A significant difference in single tree biomass was evident among the investigated plantations(P<0.05).The highest biomass(400.96 kg·tree-1)occurred in the 6 m×6 m stand of NL-895.No significant variation was observed in biomass production per area among the four planting spacings for NL-895.The stand biomass production was significantly greater in clones NL-895 and NL-95 than in NL-797 at a planting spacing of 6 m×6 m(P<0.05).The carbon content in the poplar components ranged from 39.79%to 47.76%in the order stem>branch>root>leaf.The variation tendency of poplar carbon storage was similar to the biomass production of the plantations.The highest and lowest tree carbon storage was observed in the NL-895 plantation with a planting spacing of 6 m×6 m and 3 m×8 m,respectively.Soil carbon storage in the top 1 m accounted for approximately 71.7%of the total carbon storage.However,no obvious variation in soil carbon storage was detected among plantations.The total carbon storage among the plantations differed significantly with the four planting spacings in NL-895(P<0.05).By contrast,no significant difference was observed among the plantations with the three poplar clones at 6 m×6 m spacing.Overall,the highest carbon storage of 192.46 t·hm-2 was obtained in the 6 m×6 m plantation of NL-895;this level was 1.17-,1.31-,and 1.38-times the levels in the plantations with 4.5 m×8.0 m,5 m×5 m,and 3 m×8 m spacings,respectively.The collective findings indicate that using the clone NL-895 as the planting material and establishing a plantation with an even planting spacing of 6 m×6 m are optimal management patterns for carbon sequestration forests at similar sites in Jiangsu Province.关键词
杨树/株行距/无性系/生物量/碳含量/土壤碳/碳储量Key words
poplar/spacing/clone/biomass/carbon content/soil carbon/carbon storage分类
农业科技引用本文复制引用
刘钰,张艳华,方升佐..株行距配置和无性系对杨树人工林碳储量的影响[J].森林与环境学报,2024,44(3):242-249,8.基金项目
江苏省碳达峰碳中和科技创新专项"江苏省杨树人工林碳动态及减排增汇关键技术"(BK20220017). （BK20220017）
