豫西黄土丘陵区不同林龄栎类和侧柏人工林碳、氮储量  

Storage of carbon and nitrogen in Quercus and Platycladus orientalis plantations at different ages in the hilly area of western Henan Province,China

作　　者：王艳芳[1,2] 刘领[1] 李志超 石晓峰 杨小艳 上官周平[2] 

机构地区：[1]河南科技大学农学院,河南洛阳471023 [2]西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌712100 [3]洛阳市林业调查规划管理站,河南洛阳471000 [4]偃师市林业局,河南偃师471900

出　　处：《应用生态学报》2018年第1期25-32,共8页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(31700367);国家重点研发计划项目(2016YFC0501605);国家科技基础性工作专项(2014FY210100);河南科技大学学科提升振兴A计划项目(13660001)资助~~

摘　　要：利用空间代替时间样地调查法,分析了豫西黄土丘陵区栎类和侧柏人工林生态系统碳、氮储量的分布格局,以及不同土层碳储量和氮储量随林龄的动态变化.结果表明:随着树龄的增加,两类人工林乔木层和枯落物层碳储量均增加,土壤碳储量和氮储量主要在表层(0~20 cm)汇聚,且各土层碳储量和氮储量随着林龄增加表现为减少-增加-减少的趋势.各林龄栎类人工林土壤表层碳、氮储量分别为20.31~50.07和1.68~2.12 t·hm^(-2);不同林龄侧柏人工林土壤表层碳、氮储量分别为23.99~48.76和1.59~2.34 t·hm^(-2);各林龄栎类和侧柏人工林生态系统的碳储量分别为52.04~275.82和62.18~279.81 t·hm^(-2);侧柏人工林碳汇能力略高于栎类人工林.土壤C/N随着造林年限的增加呈增加趋势.In the study, the method of space substituting time was used to investigate the distribution pattern of carbon and nitrogen storages in Quercus and Platycladus orientalis plantation ecosystems at different ages in hilly area of western Henan Province, China. We also analyzed the dynamic changes of soil carbon and nitrogen storages in different soil layers in the two plantation ecosystems. The results showed that the carbon storage in the arbor and litter layers increased with the increasing tree age. The storage of carbon and nitrogen in soil aggregated mainly in the surface layer and showed a trend of decrease-increase-decrease with the increasing tree age in all soil layers. The ranges of carbon and nitrogen storage in the surface soil were 20.31-50.07 and 1.68-2.12 t·hm-2 in Quercus plantation, and 23.99-48.76 and 1.59-2.34 t·hm-2 in P. orientalis plantation, respectively. Carbon storage ranges in Quercus and P. orientalis plantation ecosystems at different ages were 52.04-275.82 and 62.18-279.81 t·hm-2, respectively. The carbon sequestration capacity in P. orientalis plantation was a little higher than that in Quercus plantation. Soil C/N increased with the increase of afforestation age.

关 键 词：人工林 林龄 碳储量 氮储量 

分 类 号：S718.5[农业科学—林学]