长白山森林土壤剖面氨基糖的分布(英文)

Distribution of amino sugars in forest soil profiles of the Changbai Mountain

研究了长白山土壤剖面中3种氨基糖的垂直分布规律及其对土壤有机质库的贡献,样品采自长白山北坡3个样点(海拔分别为600m,1680m和2580m).3种氨基糖对总氨基糖的贡献为氨基葡萄糖>氨基半乳糖>胞壁酸,剖面中氨基糖的含量及氨基糖对土壤有机质的贡献,在表层土壤中随土壤剖面深度增加而增加,但在矿质层中规律不同.不同纬度的氨基葡萄糖/胞壁酸比值与氨基葡萄糖/氨基半乳糖比值不同,说明它们来源于不同的微生物种群.

The vertical distribution of three amino sugars and the contribution to organic matter pools in the soil profiles of the Changbai Mountain were discussed. The composite samples of organic layers and mineral horizons were collected at three sites （altitude, 600m, 1680m and 2580m） on the northern slope of the mountain. The contribution of three amino sugars to the total amounts of amino sugars was in the order glucosamine （GlucN） 〉 galactosamine （GalN） 〉 muramic acid （MurAc）. The contents of amino sugars and the proportion of amino sugars to soil organic matter in the profiles increased from the top organic layer until A horizons, but they varied among the subsoil horizons. The ratios of GlucN/MurAc and GlueN/GalN in the soil horizons at different altitudes indicated that they might originate from different microbial communities.