茅尾海茳芏及沉积物有机碳、全氮、全磷分布特征与季节动态

Distribution Characteristics and Seasonal Dynamics of Organic Carbon,Total Nitrogen,Total Phosphorus of Cyperus malaccensis and Sediments in Maoweihai Bay

为了研究中国东南沿海滨海湿地生态系统植物的养分循环机制,于2010年1月、4月、7月和10月,对广西茅尾海茳芏(Cyperus malaccensis)种群中的茳芏进行采样,并测定其有机碳含量、全氮含量、全磷含量和生物量。结果表明,茳芏种群地上部分的有机碳含量、全氮含量和全磷含量都高于地下部分的有机碳含量、全氮含量和全磷含量;其有机碳含量的季节变化规律为春季和冬季低、夏季和秋季高,全氮含量和全磷含量的季节变化规律表现为春季和冬季高、夏季和秋季低;茅尾海茳芏生产力主要受氮元素限制,但磷元素的作用不可忽视。

To understand the nutrient cycling mechanism of plants in southeast coastal wetland ecostystem,samples of Cyperus malaccensis Lam.in Maoweihai bay,had been collected in January,April,July and October in 2010,and their organic carbon,total nitrogen,total phosphorus content and biomass had also been evaluated and analysed.The results showed that,the organic carbon,total nitrogen and total phosphorus content in aboveground part of Cyperus malaccensis was higher than underground part.The organic carbon content was low in Spring and Winter but high in the rest.But total nitrogen,total phosphorus content was opposite.The productivity of Cyperus malaccensis Lam.in Maoweihai bay was mainly limited by total nitrogen,but the effect of phosphorus could not be ignored.