CAJ | 학술논문

为了探讨黑河上游冰沟流域不同土壤有机碳分布特征与土壤特性的关系，为黑河上游冰沟流域水源涵养研究提供科学依据，采用野外采样，室内分析方法，研究了4种土壤有机碳分布特征及其与土壤特性的关系。结果表明：4种土壤有机碳含量和密度在整个土壤剖面上均表现为：森林灰褐土＞高山灌丛草甸土＞高山草甸土＞山地栗钙土，且垂直分布均随土壤深度增加而减少，说明黑河上游冰沟流域的森林灰褐土比其它土壤更有利于土壤有机碳储存和积累。森林灰褐土0～10 cm土壤有机碳密度为4．54 kg·m-2，略高于我国森林土壤0～10 cm土壤平均碳密度（4．24 kg ·m-2），说明黑河上游冰沟流域的森林灰褐土区雨量充沛，林下植被丰富，凋落物现存量充足。4种土壤0～10 cm土层有机碳含量是整个土壤剖面土壤有机碳含量的30．69％～37．99％，有机碳密度是整个土壤剖面有机碳密度的29．31％～36．77％，说明黑河上游冰沟流域土壤有机碳含量和有机碳密度在表层具有很强的表聚性，不合理的人为活动引发的水土流失极易造成土壤有机碳储量的减少，应增加黑河上游冰沟流域植被覆盖度，保护生态环境，减少水土流失。4种土壤有机碳、全氮、CEC、田间持水量、团聚体在整个土壤剖面上均随土层深度增加而降低，而土壤容重、pH值在整个土壤剖面上均随土层深度增加而增大。经回归统计分析，4种土壤有机碳含量与土壤田间持水量、团聚体、全氮、CEC之间呈显著的正相关关系，与土壤容重、pH之间呈显著的负相关关系。这种变化规律与多数学者研究结果基本一致。
위료탐토흑하상유빙구류역불동토양유궤탄분포특정여토양특성적관계，위흑하상유빙구류역수원함양연구제공과학의거，채용야외채양，실내분석방법，연구료4충토양유궤탄분포특정급기여토양특성적관계。결과표명：4충토양유궤탄함량화밀도재정개토양부면상균표현위：삼림회갈토＞고산관총초전토＞고산초전토＞산지률개토，차수직분포균수토양심도증가이감소，설명흑하상유빙구류역적삼림회갈토비기타토양경유리우토양유궤탄저존화적루。삼림회갈토0～10 cm토양유궤탄밀도위4．54 kg·m-2，략고우아국삼림토양0～10 cm토양평균탄밀도（4．24 kg ·m-2），설명흑하상유빙구류역적삼림회갈토구우량충패，림하식피봉부，조락물현존량충족。4충토양0～10 cm토층유궤탄함량시정개토양부면토양유궤탄함량적30．69％～37．99％，유궤탄밀도시정개토양부면유궤탄밀도적29．31％～36．77％，설명흑하상유빙구류역토양유궤탄함량화유궤탄밀도재표층구유흔강적표취성，불합리적인위활동인발적수토류실겁역조성토양유궤탄저량적감소，응증가흑하상유빙구류역식피복개도，보호생태배경，감소수토류실。4충토양유궤탄、전담、CEC、전간지수량、단취체재정개토양부면상균수토층심도증가이강저，이토양용중、pH치재정개토양부면상균수토층심도증가이증대。경회귀통계분석，4충토양유궤탄함량여토양전간지수량、단취체、전담、CEC지간정현저적정상관관계，여토양용중、pH지간정현저적부상관관계。저충변화규률여다수학자연구결과기본일치。
Based on the method of field sampling and laboratory analysis ,the relationship between distribution of organic carbon and soil properties was investigated for four kinds of soil in Binggou Valley at the upstream of Heihe Riv-er ,so as to provide a scientific basis for local water conservation .The results showed that the content and density of or-ganic carbon in whole profile of the four tested soils were consistently ordered as :gray brown forest soil>alpine scrub meadow soil>alpine meadow soil>mountain chestnut soil ,and they decreased with the increase of soil depth ,which in-dicated that the gray brown forest soil was more beneficial to the storage and accumulation of organic carbon than other soils in Binggou Valley .The density of organic carbon in 0~10 cm depth of gray brown forest soil was 4 .54 kg·m-2 , being slightly higher than the average value (4 .24 kg·m-2 ) in 0~10 cm depth of forest soil in China ,which indicated that there was a relatively abundant litter biomass in the gray brown forest soil in Binggou Valley because of the plentiful rainfall and the good understory vegetation .The organic carbon content in 0~10 cm of the four soils was 30 .69% ~37 .99% of total organic carbon content in the whole soil profile , and the organic carbon density in 0~10 cm was 29 .31% ~36 .77% of total organic carbon density in the whole soil profile ,which illustrated that the soil organic carbon was largely concentrated in the surface soil in Binggou Valley ,and its storage capacity was easily lowered by unreasonable human activities as a result of soil and water erosion .Therefore ,the vegetation coverage should be improved so as to pro-tect the ecological environment and to reduce soil and water erosion in this region .With the increase of depth in profile of the four soils ,the organic carbon content ,total N content ,CEC ,field water capacity and aggregate percentage tended to decrease ,while the soil bulk density and pH tended to rise .The regression statistical analysis showed the organic car-bon content in the four soils was positively correlated with field water capacity ,aggregate percentage ,total N content and CEC ,but was negatively correlated with soil bulk density and pH ,being basically consistent with the results of many re-searchers .