毛竹林大小年经营模式对土壤有机碳组分含量的影响
Effect of On-Year and Off-Year Management Models on Soil Organic Carbon Componen Contents in Moso Bamboo Forest
冷利松 1周熠 2董婉君 1吴兆维 1张小平 3张健 1万众1
作者信息
- 1. 安吉县林业局 浙江安吉 313300
- 2. 浙江省安吉县竹产业协会 浙江安吉 313000
- 3. 国家林业和草原局竹子研究开发中心/竹林生态与资源利用国家林业和草原局重点实验室 杭州 310012
- 折叠
摘要
毛竹林通常采用大小年经营,以实现更高的生产力.然而,有关大小年经营对土壤碳固存的影响知之甚少.比较研究了大年和小年毛竹林的土壤养分含量、有机碳组分.结果发现,与大年毛竹林相比,小年毛竹林土壤有机碳(TOC)、微生物量碳(MBC)、易可溶性有机碳(DOC)、易氧化有机碳(EOC)、铁铝结合态有机碳[Fe(Al)-SOC]和钙结合态有机碳(Ca-SOC)含量以及碳库管理指数显著增加,而pH值、速效氮(NH4-N+NO3-N)和有效磷(AP)含量显著降低.相关性分析结果显示,土壤TOC、DOC、EOC、Ca-SOC与Fe(Al)-SOC与pH值、NO3-N和AP 呈显著负相关(P<0.05),与NH4-N呈显著正相关(P<0.05).研究结果表明,小年毛竹林提高了土壤有机碳及其组分的含量和碳库管理指数,可以弥补大年的碳和养分消耗,维持土壤固碳和保肥能力.
Abstract
Bamboo forests are usually managed on an alternating on-and off-year basis to enhance productivity.However,the impact of the management model on soil carbon sequestration remains unsolved.This study compares the soil nutrient content and organic carbon fractions in moso bamboo plantations between on-and off-years.The results indicate that,compared to the on-year,the moso bamboo forest in the off-year has higher contents of soil total organic carbon(TOC),microbial biomass carbon(MBC),dissolved organic carbon(DOC),easily oxidizable carbon(EOC),iron-and aluminum-bound organic carbon(Fe(Al)-SOC)and calcium-bound organic carbon(Ca-SOC)as well as higher carbon pool management index,while the contents of pH,available(NH4-N+NO3-N)and available phosphorus(AP)are significantly lower.Correlation analysis reveals that TOC,DOC,EOC,Ca-SOC,and Fe(Al)-SOC in soil are significantly negatively correlated with pH,NO3-N,and AP(P<0.05),and significantly positively correlated with NH4-N(P<0.05).These findings suggest that off-year management of moso bamboo forest increases the content of soil organic carbon and its fractions as well as carbon pool management index,and can replenish the soil nutrients and carbon depleted in the on-year,thereby ensuring soil fertility and soil carbon sink.
关键词
毛竹/大小年/土壤有机碳组分/经营方式/浙江安吉Key words
moso bamboo/on-year and off-year management/soil organic carbon fractions/management practice/Anji county/Zhejiang province引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据