上海市大莲湖池杉林三种优势植物枯落物分解动态  

Decomposition dynamics of the litters from three dominant plant species in Taxodium ascendens forest in Dalian Lake of Shanghai

作　　者：王斌[1] 郑思俊[1] 朱义[1] 巨波[1] 赵慧娟[1] 张群[1] 崔心红[1] 

机构地区：[1]上海市园林科学研究所,上海200232

出　　处：《生态学杂志》2013年第3期577-582,共6页Chinese Journal of Ecology

基　　金：林业公益性行业科研专项(201104088)资助

摘　　要：用枯落物分解网袋法,对上海市大莲湖湿地池杉林内3种优势植物池杉(Taxodium ascendens)、孔雀稗(Echinochloa cruspavonis)、日本看麦娘(Alopecurus japonicus)的枯落物进行了190d的分解培养,测定了分解速率及其C、N、P养分元素释放动态。用收集器法对池杉林枯落物的数量进行了研究。结果表明,池杉林内池杉每年产生枯落物量为5.70t·hm-2,是该林地枯落物的主要来源。3种植物枯落物的分解速率(枯落物的干重量损失)依次为日本看麦娘>孔雀稗>池杉。C元素含量在3种植物枯落物中随时间显著下降;N、P元素在池杉枯落物中均有不同程度的富集,而在日本看麦娘和孔雀稗中则没有发生富集现象。By using litterbag method, a 190-day incubation experiment was conducted to study the decomposition rates and the release dynamics of C, N, and P of the litters from three domi- nant species （Taxodium ascendens, Echinochloa cruspavonis, and Alopecurus japonicas ） in T. ascendens forest in Dalian Lake, Shanghai. In the meantime, the quantity of the litters in the T. ascendens forest was measured by using collection container. In the forest, the annual produc- tion of T. ascendens litters was 5.70 t·hm^-2, being the primary source of the litters in the for- est. The litter decomposition rate （ dry mass loss rate） was in the order of A. japonicus 〉 E. cruspavonis 〉 T. ascendens. During the experimental period, the C content of the three species litters decreased significantly, while the N and P contents had somewhat increase in T. ascendens litters but not in E. cruspavonis and A. japonicus litters.

关 键 词：大莲湖 湿地 枯落物分解 

分 类 号：S714[农业科学—林学]