焉耆盆地不同植被下土壤有机碳库的特征研究

Soil Organic Carbon Pool under Different Vegetation Types in Yanqi Basin of Xinjiang Province

以新疆干旱区焉耆盆地不同植被下的土壤为研究对象，研究了干旱环境不同植被下土壤有机碳库累积特征，为进一步推动干旱区有机碳循环的研究提供基础。结果表明，不同植被土壤有机碳随土壤深度的增加而减少，农田植被土壤有机碳高于相同土壤剖面其他各荒漠植被；农田植被土壤有机碳库密度高于相同土壤剖面其他各荒漠植被，且农田植被土壤剖面有机碳库密度最大；O～5、5～15、15～30、50～100cm土壤剖面的农田植被土壤有机碳库密度分布较为均匀。而非豆科植被与豆科植被的土壤有机碳库密度分布不均匀。

Based on soils under different vegetation types in Yanqi basin of Xinjiang province, the accumu- lation characteristics of soil organic carbon pool under different vegetation types were studied to provide basic references for carbon cycle in arid region. The results indicated that soil organic carbon （SOC） con- centrations decreased with soil layer depth increasing, and SOC concentrations under farmland vegetation were higher than those under other shrub at the same soil layer depth. Compared with other shrub, SOC pool densities under farmland vegetation were higher than others at same soil layer depth, respectively. SOC pool densities under farmland vegetation were distributed evenly at 0-5 cm, 5-15 cm, 15-30 cm and 50-100 em soil layer depth, respectively, but those under shrub were not distributed evenly.