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

作　　者：冷利松 周熠 董婉君 吴兆维 张小平 张健[1] 万众 Leng Lisong;Zhou Yi;Dong Wanjun;Wu Zhaowei;Zhang Xiaoping;Zhang Jian;Wan Zhong(Anji Forestry Bureau,Anji 313300,Zhejiang,China;Anji Bamboo Association,Anji 313300,Zhejiang,China;National Bamboo Research Center,Key Laboratory of State Forestry and Grassland Administration on Bamboo Forest Ecology and Resource Utilization,Hangzhou 310012,China)

机构地区：[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

出　　处：《世界竹藤通讯》2024年第4期29-34,共6页World Bamboo and Rattan

基　　金：中央财政林业科技推广示范资金项目(浙[2023]TS11号)。

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(NH_(4)-N+NO_(3)-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、NO_(3)-N和AP呈显著负相关(P<0.05),与NH_(4)-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。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(NH_4-N+NO_3-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,NO_3-N,and AP(P<0.05),and significantly positively correlated with NH_4-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 

分 类 号：S795.7[农业科学—林木遗传育种] S714.2[农业科学—林学]