Zhao Wei, Li Lin, Wang Yan Jie, Li Ya Ge, Wang Yan Fang, Wang Xin
College of Agriculture, Henan University of Science and Technology, Luo-yang 471023, Henan, China.
Ying Yong Sheng Tai Xue Bao. 2018 Jun;29(6):1867-1875. doi: 10.13287/j.1001-9332.201806.005.
In this study, we examined the vegetation and soil carbon density characteristics and carbon distribution differences of four typical grasslands in two climatic zones, including warm-tempe-rate tussock (WT), warm-temperate shrub tussock (WS), tropical tussock (TT), and tropical shrub tussock (TS) in Henan Province. The results showed that the average aboveground biomass of grasslands was significantly higher in Northwest Henan (327.4 g·m) than that in South Henan (221.4 g·m), whereas the average root biomass in Northwest Henan (1.58X10 g·m) was significantly lower than that in South Henan (1.94X10 g·m). The average aboveground carbon density of grasslands in Northwest and South Henan was 113.75 and 77.35 g C·m, respectively. The aboveground carbon density of WT in Northwest Henan was higher than that of WS, though not statistically significant. The living biomass carbon density of TT was significantly lower than that of other grasslands in Southwest Henan. The average underground carbon density of grasslands in Northwest and South Henan were 6.35X10 and 5.14X10 g C·m, respectively. In Northwest Henan, there was no difference between WT and WS for both the root and soil carbon density. In South Henan, the root carbon density of TS was significantly lower than other grasslands, while the soil carbon density of TT was significantly higher than other grasslands. The average carbon density of grassland ecosystem in Northwest and South Henan was 6.46X10 and 5.22X10 g C·m, respectively. Soil was the main contributor of ecosystem carbon storage and accounted for about 78%-90% of total grassland ecosystem carbon density. In addition, there were no significant differences in the ecosystem carbon density between WT and WS in Northwest Henan, while TT possessed significantly higher ecosystem carbon density (9.70X10 g C·m) compared with other grasslands in Southern Henan. Our results provide basic data for accurately calculating ecosystem carbon storage and assessing carbon sequestration potential of different grasslands in Henan Province.
在本研究中，我们调查了河南省两个气候区四种典型草地的植被和土壤碳密度特征以及碳分布差异，这四种草地包括暖温带草丛（WT）、暖温带灌草丛（WS）、热带草丛（TT）和热带灌草丛（TS）。结果表明，豫西北草地的平均地上生物量（327.4 g·m）显著高于豫南（221.4 g·m），而豫西北的平均根系生物量（1.58×10 g·m）显著低于豫南（1.94×10 g·m）。豫西北和豫南草地的平均地上碳密度分别为113.75和77.35 g C·m。豫西北WT的地上碳密度高于WS，但无统计学显著差异。豫西南TT的活体生物量碳密度显著低于其他草地。豫西北和豫南草地的平均地下碳密度分别为6.35×10和5.14×10 g C·m。在豫西北，WT和WS的根系碳密度及土壤碳密度均无差异。在豫南，TS的根系碳密度显著低于其他草地，而TT的土壤碳密度显著高于其他草地。豫西北和豫南草地生态系统的平均碳密度分别为6.46×10和5.22×10 g C·m。土壤是生态系统碳储存的主要贡献者，约占草地生态系统总碳密度的78% - 90%。此外，豫西北WT和WS的生态系统碳密度无显著差异，而豫南TT的生态系统碳密度（9.70×10 g C·m）显著高于其他草地。我们的研究结果为准确计算河南省不同草地的生态系统碳储量和评估碳固存潜力提供了基础数据。
