镇江滨江湿地优势植物种群的热值及其能量生产动态  

Dynamics of caloric value and energy production of dominant plant community in Binjiang wetland,Zhenjiang

作　　者：李萍萍[1] 陆军[1] 吴沿友[1] 付为国[1] 

机构地区：[1]江苏大学现代农业装备与技术省部共建教育部重点实验室/江苏省重点实验室,江苏镇江212013

出　　处：《浙江大学学报（农业与生命科学版）》2008年第2期221-229,共9页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：国家高技术研究发展计划863"资助项目(2003AA601100).

摘　　要：为了对镇江市滨江湿地生态系统进行保护与修复，改善湿地功能与效益，提高湿地生产量，于2006年3月起，在长江中下游镇江内江南岸北固山-大东沟湿地，对优势植物种群芦苇和稿草及其各器官的热值、能量现存量、年净初级生产力及光能利用效率动态进行研究．结果表明：（1）芦苇、稿草及其器官的热值都随着生育期而略有提高，但变化较为平缓．芦苇热值在17953．24～18452．62J·g^-1之间变化，稿草热值变化范围在17702．51～18291．72J·g^-1之间；（2）全年群落能量现存量随时间而增加，并与生物量增长趋势相一致；（3）滨江湿地生态系统年能量净初级生产力为29355．06kJ·m^-2·年^-1，不同种群器官构件的能量生产与分配的季节动态也有差异；（4）芦苇、稿草种群的年光能利用率分别为1．30％和0．33％．说明植物光合作用积累能量的动态变化与群落生产力变化机制密不可分．In order to protect and restore wetland ecosystem, and improve the amount of production of the wetland, the caloric, existent energy value, annual net primary productivity and efficiency for solar energy utilization were measured in a dominant plant community at Binjiang wetland, Zhenjiang in the year 2006. The results show that： （1） Phragmites australis and Phalaris arundinacea with all the caloric value of the reproductive organs period increased slightly, but the changes were more smooth. Caloric value of Phragmitesaustralis ranged from 17953.24 J·g^-1 to 18452.62 J·g^-1, that of Phalaris arundinacea ranged from 17702.51 J· g^-1 to 18291.72 J· g^-1; （2） The energy value of existing communities increased with time, and was consistent with the biomass growth tendency; （3） The annual net primary productivity （ANPP） of wetland ecosystem was 29355.06 kJ·m^-2· year^-1 in Binjiang wetland. The dynamics of energy production and allocation rate of modulus were different with seasons; （4） The efficiency for solar energy utilization of Phragmites australis and Phalaris arundinacea was 1.30% and 0.33%, respectively. This suggest that the relationships between mechanism of productivity dynamics and mechanism of energy dynamics stimulated by photosynthesis are very closer.

关 键 词：热值 能量现存量 年能量净初级生产力 光能利用率 镇江滨江 湿地 

分 类 号：S543.9[农业科学—作物学]