中南林业科技大学学报
中南林業科技大學學報
중남임업과기대학학보
JOURNAL OF CENTRAL SOUTH UNIVERSITY OF FORESTRY & TECHNOLOGY
2015年
5期
64-69
,共6页
窦艳星%侯琳%马红红%张硕新%田瑞选
竇豔星%侯琳%馬紅紅%張碩新%田瑞選
두염성%후림%마홍홍%장석신%전서선
松栎混交林%间伐%水溶性有机碳%微生物量碳%秦岭
鬆櫟混交林%間伐%水溶性有機碳%微生物量碳%秦嶺
송력혼교림%간벌%수용성유궤탄%미생물량탄%진령
Pine-oak mixed forest%forest thinning%water dissolved organic carbon%microbial biomass carbon%Qinling mountains
为探讨抚育间伐对林地土壤活性有机碳的影响，以秦岭火地塘林区松栎混交林为研究对象，通过野外采样和室内分析，对不同间伐强度和间伐残留物移除强度下土壤活性有机碳特征进行了研究。结果表明：不同间伐强度和间伐残留物移除强度下，土壤水溶性有机碳(DOC)和微生物量碳（MBC）含量分别在42.65～86.03 mg·kg-1和91.30～510.76 mg·kg-1之间波动，占土壤总有机碳（TOC）的比例范围分别为0.20%～0.39%和0.41%～2.05%；当间伐强度为16.34%～17.05%、间伐残留物移除强为35.86%～40.69%时，土壤DOC和MBC含量在0～10 cm和10～20 cm土层分别可达到最大值84.95、59.65 mg·kg-1和390.76、293.60 mg·kg-1；间伐强度是影响土壤MBC含量和0～10 cm土层土壤DOC含量的主导因子，间伐残留物移除强度是影响10～20 cm土层土壤DOC含量的主导因子；土壤中有机质含量的有效性达到最佳，间伐强度和间伐残留物移除强度的最适设置范围分别为16.34%～17.05%和35.86%～40.69%。
為探討撫育間伐對林地土壤活性有機碳的影響，以秦嶺火地塘林區鬆櫟混交林為研究對象，通過野外採樣和室內分析，對不同間伐彊度和間伐殘留物移除彊度下土壤活性有機碳特徵進行瞭研究。結果錶明：不同間伐彊度和間伐殘留物移除彊度下，土壤水溶性有機碳(DOC)和微生物量碳（MBC）含量分彆在42.65～86.03 mg·kg-1和91.30～510.76 mg·kg-1之間波動，佔土壤總有機碳（TOC）的比例範圍分彆為0.20%～0.39%和0.41%～2.05%；噹間伐彊度為16.34%～17.05%、間伐殘留物移除彊為35.86%～40.69%時，土壤DOC和MBC含量在0～10 cm和10～20 cm土層分彆可達到最大值84.95、59.65 mg·kg-1和390.76、293.60 mg·kg-1；間伐彊度是影響土壤MBC含量和0～10 cm土層土壤DOC含量的主導因子，間伐殘留物移除彊度是影響10～20 cm土層土壤DOC含量的主導因子；土壤中有機質含量的有效性達到最佳，間伐彊度和間伐殘留物移除彊度的最適設置範圍分彆為16.34%～17.05%和35.86%～40.69%。
위탐토무육간벌대임지토양활성유궤탄적영향，이진령화지당림구송력혼교림위연구대상，통과야외채양화실내분석，대불동간벌강도화간벌잔류물이제강도하토양활성유궤탄특정진행료연구。결과표명：불동간벌강도화간벌잔류물이제강도하，토양수용성유궤탄(DOC)화미생물량탄（MBC）함량분별재42.65～86.03 mg·kg-1화91.30～510.76 mg·kg-1지간파동，점토양총유궤탄（TOC）적비례범위분별위0.20%～0.39%화0.41%～2.05%；당간벌강도위16.34%～17.05%、간벌잔류물이제강위35.86%～40.69%시，토양DOC화MBC함량재0～10 cm화10～20 cm토층분별가체도최대치84.95、59.65 mg·kg-1화390.76、293.60 mg·kg-1；간벌강도시영향토양MBC함량화0～10 cm토층토양DOC함량적주도인자，간벌잔류물이제강도시영향10～20 cm토층토양DOC함량적주도인자；토양중유궤질함량적유효성체도최가，간벌강도화간벌잔류물이제강도적최괄설치범위분별위16.34%～17.05%화35.86%～40.69%。
The experiments were carried out to test the effects of forest thinning on soil labile organic carbon in a Pine-oak mixed forest in the Qinling Mountains. The quadratic general rotary design was applied, and thinning intensity and residue removed intensity were considered as factors in the experiments. Based on field sampling and laboratory analyzing, the characteristics of soil labile organic carbon under different thinning and residue removed intensities were analyzed. The contents of DOC (dissolved organic carbon) and MBC (Microorganism biomass carbon) ranged from 42.65 mg·kg-1 to 86.03 mg·kg-1, and from 91.30 mg·kg-1 to 510.76 mg·kg-1 respectively. The ratio DOC/TOC (total organic carbon) and MBC/TOC ranged from 0.20% to 0.39%, and from 0.41% to 2.05%respectively. When they were maximized as 84.95 mg·kg-1 (DOC), 390.76mg·kg-1 (MBC) in the depth of 0~10 cm in soil and 59.65 mg·kg-1 (DOC), 293.60 mg·kg-1 (MBC) in the depth of 10 to 20 cm soil, the thinning intensity and the residue removed intensity were 16.34% ~ 17.05%and 35.86% ~ 40.69%. The thinning intensity was the key factor to affect MBC and DOC (in the depth of 0 ~ 10 cm soil). In the depth of 10 to 20 cm soil, the residue removed intensity changed as the key factor to affect DOC. Providing the availability of soil organic carbon would achieved most fully, the thinning intensity and the residue removed intensity were 16.34%~17.05%and 35.86%~40.69%.
