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选取科尔沁沙地3种代表性灌木(差不嘎蒿、黄柳、小叶锦鸡儿)作为研究对象,采用网袋法对其凋落物进行研究,每月取样测试,结合试验期间当地气象资料,对凋落物在不同类型沙丘、不同深度的分解率进行相关分析。结果表明,生长季节内,放置在地表的凋落物在固定沙丘上的分解率大于其在流动沙丘上的分解率,而在冬春季节却相反;凋落物在地下10cm深处的分解普遍快于地表;经过一年的分解,差不嘎蒿的分解率大于另两种植物,以固定沙丘地表放置为例,其最终分解率为53.6%,大于小叶锦鸡儿的28.5%及黄柳的21%;降水对凋落物的分解影响较地温更大。
Three representative shrubs (Artemisia chinensis, Artemisia yellow, Caragana microphylla) were selected as the study objects. The litter method was used to study the litter, the monthly sampling and the local meteorological data during the experiment, The litterfalls were analyzed in different types of sand dunes at different depths. The results showed that in the growing season, litterfalls on the surface were more decomposed on the fixed sand dunes than on the moving sand dunes, but opposite in the winter and spring seasons; the litterfall was generally 10cm below the ground After one year’s decomposition, the rate of decomposition of Artemisia ordosana was higher than that of the other two plants. The final decomposition rate was 53.6% in the fixed sand dunes, 28.5% larger than Caragana microphylla and 21% Precipitation has a greater effect on the litter decomposition than geothermal.