摘要
利用分解网袋法,对乌梁素海两种优势沉水植物进行了连续58天的室内腐烂分解试验,分析研究了不同水体营养盐浓度下这两种植物的干重损失及其氮、磷的消减过程。结果表明,水体营养盐的浓度变化对植物干重损失影响不显著,菹草的干重损失大于篦齿眼子菜,两种植物的干重损失呈指数衰减;不同水体营养盐浓度对植物氮、磷的释放有明显影响;随水体的营养盐浓度升高,植物氮、磷的释放速率也相应增加,且在腐烂分解过程中植物体内的磷优先释放出来。
With the litterbag method, the decompositions of two submerged macrophytes （ Potamogeton pectinatus and Potamogeton crispus）growing in WuLiang SuHai Lake were in investigated in 58 days consecutively. Results showed, Potamogeton crispus had the higher decomposition rate comparing to Potamogeton pecinatus. Nutrients in water had negligible effects on the loss of dry weight but had significant effect on the release of phosphorus and nitrogen from plant material. The level of nutrients in water was positively related to the release rate of phosphorus and nitrogen. Phosphorus release was prior to nitrogen in the breakdown process. The loss process of dry weight of plant was modeled.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2008年第4期181-184,共4页
Journal of Arid Land Resources and Environment
基金
内蒙古湖泊修复项目资金支持
关键词
乌梁素海
沉水植物
营养盐
释放速率
Wuliangsubai Lake
submerged macrophyte
nutrients release rate
