生态学报
生態學報
생태학보
ACTA ECOLOGICA SINICA
2009年
7期
3501-3508
,共8页
王建林%欧阳华%王忠红%常天军%李鹏%沈振西%钟志明
王建林%歐暘華%王忠紅%常天軍%李鵬%瀋振西%鐘誌明
왕건림%구양화%왕충홍%상천군%리붕%침진서%종지명
高寒草原生态系统%活性有机碳%分布特征%影响因素
高寒草原生態繫統%活性有機碳%分佈特徵%影響因素
고한초원생태계통%활성유궤탄%분포특정%영향인소
alpine grassland ecosystem%labile organic carbon%distribution characteristics%influential factors
对贡嘎南山-拉轨岗日山南坡高寒草原生态系统表层(0~20cm)土壤活性有机碳分布特征研究表明:表层(0~20 cm)土壤活性有机碳平均为(2.4986±0.7864) g/kg,占表层土壤有机碳的(12.7926±21.00)%.在海拔4424~4804m范围内,随着海拔升高,表层(0~20cm)土壤活性有机碳含量表现出先减少后增加的分布特征,有机碳活度也表现出先减少后增加的分布特征.影响表层土壤活性有机碳含量最关键的环境因子是地上生物量、0~10cm地下生物量、30~40cm地下生物量、20~30cm土壤含水量、0~20cm土壤容重、20~40cm土壤容重和土壤全N量;影响表层土壤有机碳活度最关键的环境因子则是植被盖度、20~30cm地下生物量、0~10cm土壤含水量、10~20cm土壤含水量、20~30cm土壤含水量、土壤有机质、土壤速效K和土壤全N量.
對貢嘎南山-拉軌崗日山南坡高寒草原生態繫統錶層(0~20cm)土壤活性有機碳分佈特徵研究錶明:錶層(0~20 cm)土壤活性有機碳平均為(2.4986±0.7864) g/kg,佔錶層土壤有機碳的(12.7926±21.00)%.在海拔4424~4804m範圍內,隨著海拔升高,錶層(0~20cm)土壤活性有機碳含量錶現齣先減少後增加的分佈特徵,有機碳活度也錶現齣先減少後增加的分佈特徵.影響錶層土壤活性有機碳含量最關鍵的環境因子是地上生物量、0~10cm地下生物量、30~40cm地下生物量、20~30cm土壤含水量、0~20cm土壤容重、20~40cm土壤容重和土壤全N量;影響錶層土壤有機碳活度最關鍵的環境因子則是植被蓋度、20~30cm地下生物量、0~10cm土壤含水量、10~20cm土壤含水量、20~30cm土壤含水量、土壤有機質、土壤速效K和土壤全N量.
대공알남산-랍궤강일산남파고한초원생태계통표층(0~20cm)토양활성유궤탄분포특정연구표명:표층(0~20 cm)토양활성유궤탄평균위(2.4986±0.7864) g/kg,점표층토양유궤탄적(12.7926±21.00)%.재해발4424~4804m범위내,수착해발승고,표층(0~20cm)토양활성유궤탄함량표현출선감소후증가적분포특정,유궤탄활도야표현출선감소후증가적분포특정.영향표층토양활성유궤탄함량최관건적배경인자시지상생물량、0~10cm지하생물량、30~40cm지하생물량、20~30cm토양함수량、0~20cm토양용중、20~40cm토양용중화토양전N량;영향표층토양유궤탄활도최관건적배경인자칙시식피개도、20~30cm지하생물량、0~10cm토양함수량、10~20cm토양함수량、20~30cm토양함수량、토양유궤질、토양속효K화토양전N량.
The distribution characteristics of the topsoil (0-20cm) labile organic carbon of alpine grassland ecosystem at the south slope of Gongga south mountain-Laguigangri mountain were studied. The results showed that, the average content of the topsoil (0-20cm) labile organic carbon was (2.4986±0.7864) g/kg, accounting for (12.7926±21.00)% of the topsoil organic carbon in alpine grassland ecosystem at the south slope of Gongga south mountain-Laguigangri mountain. With increasing altitude, the distribution characteristics of the topsoil (0-20cm) labile organic carbon and organic carbon lability were decrease→increase within the altitude range of 4424-4804m. The key environmental factors influencing the content of topsoil labile organic carbon were overground biomass, biomass of underground 0-10cm and 30-40cm, moisture of underground 20-30cm, soil bulk density of underground 0-20cm and 20-40cm, and soil total Nitrogen content. However, the key environmental factors for the topsoil (0-20cm) organic carbon lability were vegetation coverage, 20-30cm belowground biomass, 0-10cm,10-20cm and 20-30cm underground soil moisture, soil organic matter, soil labile Potassium and soil total Nitrogen content.