松嫩平原旱地生境芦苇种群不同龄级根茎的干物质贮藏及水溶糖含量  

Dry matter storage and water soluble sugar content in different age classes rhizomes of Phragmites communis population in dry land habitat of Songnen Plain of China

作　　者：杨允菲[1] 张宝田[1] 田尚衣[1] 

机构地区：[1]东北师范大学草地科学研究所植被生态科学教育部重点实验室,长春130024

出　　处：《应用生态学报》2008年第9期1905-1910,共6页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(30770397;30470272);东北师范大学分析测试基金资助项目

摘　　要：通过对松嫩平原旱地生境单优种群落芦苇种群不同龄级根茎的调查测定,分析了一个生长季内3个生育期芦苇种群各龄级根茎干物质贮量和水溶糖含量的季节变化.结果表明:各生育期低龄级芦苇种群根茎中干物质贮量和水溶糖含量均较少,且与高龄级的差异较大;随着生长季的进程,低龄级根茎中干物质贮量和水溶糖含量迅速增加,且与高龄级的差异逐步缩小.在整个生长季,芦苇种群各龄级根茎均具有养分消耗和再贮藏乃至超补偿性贮藏的活性,其中,幼龄级根茎的活性更大.高龄级根茎的干物质贮量和水溶糖含量有一个逐年累积的增加过程.根茎干物质贮量在龄级间和龄级内的差异均达到了极显著水平(P<0.01),并且龄级间的差异大于龄级内.水溶糖含量仅在龄级间差异达到显著水平(P<0.05).随着龄级的增加,芦苇种群根茎的干物质贮量和水溶糖含量均呈二次曲线变化.Based on the investigation and measurement of Phragmites communis in a single dominant species community in dry land habitat of Songnen Plain, the seasonal variation of matter storage and water soluble sugar content in different age classes rhizomes at three growth stages were analyzed. The results showed that at all growth stages, younger age class rhizomes had lower dry matter storage and water soluble sugar content, and there was an obvious difference between younger and older age classes. The dry matter storage and water soluble sugar content in younger age class rhizomes increased rapidly with growth season, and the difference between younger and older age classes reduced gradually. In the whole growth season, all the rhizomes of six age classes kept up the activities in nutrient consumption, re-storage and even overcompensating storage, and the activities of younger age class rhizomes were much higher. The dry matter storage and water soluble sugar content in older age class rhizomes increased with year. There existed extremely significant differ ences （P 〈0.01 ） in the dry matter storage within and among different age class rhizomes, and the difference was larger within age classes than among age classes. Significant differences （P 〈 0. 05 ） in water soluble sugar content were also observed among different age class rhizomes. The dry matter storage and water soluble sugar content in P. communis rhizomes increased in quadratic with increasing age class.

关 键 词：芦苇 根茎 龄级 干物质贮藏 水溶糖 旱地生境 

分 类 号：Q945.3[生物学—植物学] Q948