文献类型：期刊文献

中文题名：地形因子对思茅松人工林土壤有机碳储量的影响

英文题名：Influence of Terrain Factors on Soil Organic Carbon Stock in Pinus kesiya var. langbianensis Plantation

作者：贾呈鑫卓[1] 李帅锋[1,2] 苏建荣[1,2]

第一作者：贾呈鑫卓

机构：[1]中国林业科学研究院资源昆虫研究所;[2]国家林业局普洱森林生态系统定位研究站

年份：2016

卷号：29

期号：3

起止页码：424-429

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：林业公益性行业科研专项项目(201404211);云南省科技计划项目(2013RA004);中国林科院中央级公益性科研院所基本科研业务费专项资金资助项目(CAFYBB2014QA014)

语种：中文

中文关键词：思茅松人工林;中龄林;土壤有机碳储量;地形因子

外文关键词：Pinus kesiya var.langbianensis;plantation;middle-aged forest;SOC stocks;terrain factors

分类号：S791.259

摘要：[目的]以思茅松人工中龄林为研究对象,探讨不同坡向、坡度和坡位对思茅松人工林SOC储量的影响,为精确评估思茅松人工林碳储量提供科学依据。[方法]对不同坡向、坡度和坡位不同土壤层次的SOC含量、全氮、土壤密度、C:N和SOC储量进行T检验和单因素方差分析,对不同土层的SOC储量和全氮、土壤密度、C:N之间进行Pearson相关分析。[结果]思茅松人工中龄林,SOC含量、全氮和C:N随着土层加深而减少,土壤密度随着土层加深而增加。不同的坡向和坡度显著影响SOC储量大小,阳坡的SOC储量要显著高于阴坡,坡度为20 30°的SOC储量要显著低于10 20°和0 10°,坡位对SOC储量大小无显著影响。在0 100 cm土层中,随着土层深度的增加,不同立地条件的思茅松人工中龄林的SOC储量呈减小趋势,不同坡向、坡位和坡度0 20 cm土层SOC储量均显著高于其它土层。坡向和坡度显著影响0 20 cm土层的SOC储量(P<0.05);坡位对各层SOC储量均无显著影响(P<0.05)。0 20 cm土层中SOC储量和土壤密度呈极显著负相关,和坡向、坡度呈显著负相关关系;除2040 cm土层外,其它土层的SOC储量与全氮之间呈极显著正相关;SOC储量和坡位与C:N在任一土层均无显著相关关系。[结论]立地条件差异影响SOC储量的大小与分布,尤其是坡向和坡度的不同会造成思茅松人工中龄林SOC储量的差异。
[Objective]Taking middle-aged Pinus kesiya var.langbianensis plantations as examples to study the in-fluence of terrain factors on soil organic carbon （SOC）reserve in P.kesiya var.langbianensis plantations.[Meth-od]The differences in SOC contents,total nitrogen,soil bulk density,C：N ratio and SOC reserve among different soil layers under different site conditions were analyzed using T test and single factor analysis of variance,and the Pearson correlation between SOC reserve and total nitrogen,bulk density,C：N ratio was evaluated.[Result]The results showed that the SOC content,total nitrogen and C：N ratio decreased with the soil depth,while the bulk den-sity increased.The aspect and slope had a significant effect on SOC reserve.The effect was significantly higher in shady slope than in sunny slope and significantly lower in slope 20 30°than in slopes 10 20°and 0 10°.But the slope position has no significant effect on SOC reserve.For 0 100 cm soil layer,the SOC reserve showed a tendency of reduction with the soil depth at different site conditions of middle-aged P.kesiya var.langbianensis plantation.And the SOC reserve was significantly higher among 0^-20 cm soil layer at different aspect,slope posi-tion and slope degree.But the aspect and slope degree had a significant impact on the SOC reserve of 0^-20 cm （P〈0.05）.For 0^-20 cm soil layer,the SOC reserve showed a significant negative correlation with soil bulk density, aspect and slope.And there was significantly positive relation between SOC reserve and total nitrogen in all soil lay-ers except 20-40 cm.There had no significant relationship between SOC reserve and slope position and C：N ratio in any soil layer.[Conclusion]The results suggested that the site conditions would influence the size and distribu-tion of carbon storage,especially the aspect and slope would cause the difference of SOC storage in middle-aged P. kesiya var.langbianensis plantation.