By studying the distribution pattern of grassland biomass carbon under different altitude gradients,the carbon stock of ecosystems under different altitude gradients can be assessed,providing scientific basis for eco-system carbon balance and carbon management.This paper investigated the distribution characteristics and corre-lation between aboveground biomass carbon of grassland and soil environmental factors at different altitude gradi-ents in the Ili River Valley,and the results showed that:①with the rise in altitude,soil temperature showed a fluc-tuating downward trend,and soil water content and salinity showed a fluctuating upward trend.The soil tempera-ture,water content and salinity in the altitude gradient H1-H10(1000～2500m)were at 10.87 19.97° C,8.42％～40.17％and 0～1.31 g/kg,respectively.②Aboveground biomass carbon stock in grassland showed a trend of"decrease-increase-decrease"with the increase of elevation in May,with the maximum of 234 g/Cm2 at H9(2100～2200 m),and"increase-decrease-increase"at H2(1200～1300 m)in July;on spatial distribution,aboveground biomass carbon stock showed a trend of"west-high"in May,with the maximum of 296.44 gC/m2.In July,there was an"increase-decrease-increase"trend,with a maximum of 296.44 gC/m2 at H2(1200～1300 m);in terms of spatial distribution,the aboveground biomass carbon stock showed a"west-high-east-low"distribution in May,and the opposite trend was observed in July.③ Aboveground biomass carbon stocks at altitude H8(2000～2100m)were significantly negatively correlated with soil temperature and positively correlated(P＜0.05)with both soil moisture and vegetation leaf area index.
Yili river Valleydifferent altitudinal gradientsaboveground biomass carbonenvironmental factors
NETL
NSTL
维普
万方数据
