摘要
基于白洋淀6个典型样地,分析了芦苇(Phragmites australis)、篦齿眼子菜(Potamogeton pectinatus)、荷(Nelum bo nucifera)—蓖齿眼子菜和荷—香蒲(Typha orientalis)—金鱼藻(Ceratophyllum demersum)4种优势植物群落的生物量,并探讨了水体和台田土壤等环境因子对植物群落生物量的影响。研究结果表明,在6个典型样地中,端村样地的4种优势植物群落的平均生物量最小,为496.04 g/m2;其次为枣林庄(718.86 g/m2)和采蒲台(785.91 g/m2);再次为王家寨(1 020.97 g/m2)和圈头(1 092.85 g/m2);最大平均生物量出现在烧车淀样地,为1 318.75 g/m2。植物群落类型对水生植物生物量具有显著影响;水体中的氨态氮含量对植物生物量的影响达到显著性水平;由于光照的原因,水深的增加抑制了沉水植物生物量的累积。同时,台田表层土壤中的营养元素含量对植物生物量也有一定的影响。
As the largest freshwater lake in North China, the Baiyangdian Lake plays an important role in main- taining regional ecological security. And the dominant plants in the lake include Phragmites australis, Typha orientalis, Nelumbo nucifera, Potamogeton pectinatus and Ceratophyllum demersum. Six typical sites were select- ed in the Baiyangdian Lake to study the biomass of 4 dominant plant communities and their relationships be- tween water, sediments and surface soils of the raised fields. The results showed that the minimum average value of biomass appeared in Duancun site （496.04 g/m2）, followed by Zaolinzhuang site （718.86 g/m2） and Caiputai site （785.91 g/m2）, whereas a higher increasing range occurred in Wangjiazhai site （1 020.97 g/m2） and Quantou site （1 092.85 g/m2） and Shaochedian site （1 318.75 g/m2）. The highest average biomass ap- peared in Shaochedian site among 6 sampling sites. Biomass showed significant differences between different community types （p〈0.05）. Plant biomass was significantly positively correlated with ammonia nitrogen in wa- ters （p〈0.05）. Nitrate nitrogen in waters also showed positive correlation with biomass, though no significant correlation was observed （p〉0.05）. Moreover, the increase in water depth inhibited biomass accumulation of submerged plants because of light shortage. And the nutrient element of surface soils in the raised fields also showed certain effects on aquatic plant biomass.
出处
《湿地科学》
CSCD
北大核心
2013年第4期482-487,共6页
Wetland Science
基金
国家水体污染控制与治理科技重大专项项目(2009ZX07209-008)资助
关键词
植物生物量
群落类型
影响因子
白洋淀
plant biomass
community type
influencing factor
Baiyangdian Lake
