作　　者： ; ;

机构地区： 青岛农业大学资源与环境学院

出　　处： 《湿地科学》 2013年第3期334-338,共5页

摘　　要： 在5℃、15℃和25℃温度下,研究藨草(Scirpus triqueter)烘干样品和鲜样品的分解状况,探讨夏季受淹死亡的藨草分解动态及其与正常凋落物分解的差异。结果表明,5个月后,25℃处理下,藨草剩余干物质质量分别为初始时的31.20%(烘干样品)和19.30%(鲜样品);5℃处理下,藨草剩余干物质质量分别为初始时的65.15%(烘干样品)和62.12%(鲜样品);25℃处理下的藨草剩余干物质质量明显低于5℃处理下的藨草剩余干物质质量;藨草的前处理亦会影响其分解过程,在5℃和15℃处理下,藨草鲜样品在前期的分解速度低于藨草烘干样品,但它们后期的分解速度无明显差别,而在25℃处理下,藨草鲜样品的分解速度明显大于烘干样品。因此,在夏季丰水期,具有明显水文动态的河流中的矮小水生植物,在受淹死亡后,其分解速度较快,能对生态系统的物质循环和水质环境产生影响。 To explore the decomposition dynamic of Scirpus triqueter which died because of seasonal flooding, this paper researched the effect of temperature （5 ℃, 15 ℃ and 25 ℃） on decomposition rate and dynamic of different status （living and drying） last 5 months. The results showed that at the end of the experiment, the re- maining mass ratios were different between treatments but had a same law. At the same temperature, the re- maining mass ratios of drying treatments were higher than those of living treatments, for example 31.20% （drying） and 19.30% （living） at 25 ℃, 46.00% （drying） and 43.02% （living） at 15 ℃, 65.15% （drying） and 62.12% （living） at 5 ℃. On the other hand, the temperature results in different decomposition dynamic be- tween the different samples＇ statuses. During the earlier stage of the experiment, the decomposition rate of drying samples were higher than that of living ones under 5 ℃ and 15 ℃, for example, the remaining mass ra- tios were 72.86% （drying） and 77.31% （living）, 63.00%（drying） and 83.61% （living） after 1 month. But the de- composition rates of the drying samples were lower than those pf living ones after about 2 months. The de- composition rate of the drying samples was lower than that of living ones during the whole experiment under 25 ℃. During the wet season, the plants died because of flooding in hydrological river had higher decomposi- tion rate and brought about the others ecology influences such as mass recycling, and water environment. So the managers of river ecosystem must adopt the scientific and reasonable steps to alleviate the different dy- namic.

关 键 词： 藨草 分解 烘干 温度

领　　域： [环境科学与工程]