纳帕海高原湿地土壤有机质对水分梯度变化的响应

 在气候变化和人类活动的影响下,纳帕海高原湿地干旱化加剧,湿地面积萎缩,湿地的生态功能退化严重.纳帕海湿地土壤有机质对水分环境梯度变化的响应研究结果表明,湿地土壤有机质在不同的水分环境梯度下的分布具有差异性;湿地土壤水分含量增加有助于土壤有机质的积累,同时,土壤有机质的增加改善了土壤结构,增加了土壤的持水性能,土壤有机质和水分的有机耦合对湿地土壤发挥碳“汇”和蓄持水功能有着重要的作用,因此,保护湿地环境对发挥湿地碳"汇"和水源的涵养功能具有重要的作用.

Response of soil organic matters to water contents in Napahai plateau wetlands

The function of Napahai plateau wetland has degraded badly in recent years because of natural factors and human interferences.Based on field investigation and laboratory analysis,the spatial distribution of soil organic matters was analyzed in Napahai wetland.The results show that the organic matters contents in the soil increased with the increase of water contents.In the meanwhile the increase of organic matters improves the soil structure,which playing a key role of wetland soil carbon “sink” and increasing the wetland soil water-holding properties.Therefore,protecting wetland environment can help improving the function of wetland soil carbon “sink” and water-holding properties.