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中国农学通报

中国农学通报 ›› 2009, Vol. 25 ›› Issue (24): 464-467.

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大汶河湿地香蒲和芦苇分解动态研究

柳新伟   

  • 收稿日期:2009-07-07 修回日期:2009-08-31 出版日期:2009-12-20 发布日期:2009-12-20

Decomposition Dynamic of Phragmites australis and Typha angustata in Dawenhe wetland

  • Received:2009-07-07 Revised:2009-08-31 Online:2009-12-20 Published:2009-12-20

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摘要：

根据对大汶河湿地芦苇和香蒲凋落物分解剩余率测定，分析了凋落物分解动态。结果显示： 1)各处理动态相似，即随着分解的进行，芦苇和香蒲干物质剩余率呈现三个阶段：快速下降-平稳下降-快速下降；2）芦苇分解速度明显小于香蒲，到分解结束时芦苇和香蒲的干物质剩余率分别为 ；3）上层分解速度明显快于下层，到试验结束时，各处理干物质剩余量分别为上层芦苇（FX）42%，下层香蒲（CL）58%，上层香蒲（FX）38.2%，下层香蒲（CX）53.3%。结果对于了解湿地物质循环，对湿地生态系统进行科学管理具有重要意义。

关键词: 生物降解, 生物降解, 地膜, 标准, 存在问题, 发展趋势

Abstract:

The remaining ratio of litter decomposition， component contents of cellulose and lignin of Phragmites australis and Typha angustata in Dawenhe wetland were measured; Changing trend and the result of nutrient dynamics were analyzed. The results showed that : (1) With the litter decomposition of Phragmites australis and Typha angustata ，the changing tendency of decomposition ratio was similier but different in result.， it fell rapidly in Nov.~Jan ，and then declined gradually in Jan~Apr.， the last Apr~Aug.fell more rapidly. 2）Decomposition ratio in the upper layer was more rapidly than the lower layer(k value 0.003>0.002) ， Remaining of litter decomposition were FL42%，CL58%，FX38.2%，CX53.3%.