摘要
对三江源地区原生植被、轻度、重度和极度退化的土壤碳素含量的研究分析表明：土壤碳素含量随着土层的加深都表现为逐渐减少,变化幅度分别为72.22-46.93 mg/kg,64.73-15.95 mg/kg,19.03-14.10mg/kg,17.92-10.96 mg/kg;随着海拔的降低也都表现为逐渐减少,变化幅度分别为32.02-15.66 mg/kg,21.11-12.88 mg/kg,10.73-8.54 mg/kg,10.56-8.35 mg/kg;玉树和果洛地区的土壤碳素含量都随着草地退化程度的加剧表现为逐渐降低,变化幅度分别为34.82-12.88 mg/kg,11.77-5.19 mg/kg,并且玉树地区比果洛地区土壤碳素含量高。
Through research on the C contents of undegradation, light, heavy and extreme degradation soil in source area of Lantsang, Yellow and Yangtse River. The result indicated that in different soil layer, with its depth increase, the contents of C decrease, and change extent are 72.22-46.93 mg/ kg, 64. 73-15. 95 mg/kg, 19. 03-14.10 mg/kg, 17. 92-10. 96 mg/kg, respectively; with altitude decrease, the contents of C decrease, and change extent are 32.02-15.66 mg/kg,21.11-12.88 mg/ kg,10.73-8.54 mg/kg, 10.56-8.35 mg/kg, respectively; with the degree of degradation increase, the C contents of Yushu and Guoluo reduce, and change extent are 34.82- 12. 88 mg/kg, 11.77 5.19 mg/kg, respectively; Yushu area is higher than Guoluo area in the content of C.
出处
《西北农业学报》
CAS
CSCD
北大核心
2007年第6期257-260,共4页
Acta Agriculturae Boreali-occidentalis Sinica
基金
三江源区适宜栽培草种快速扩繁与加工技术研究(2005-SN-3)
关键词
三江源地区
土壤
碳库
Source area of Lantsang, Yellow and Yangtse River Soil
Carbon store
