摘要
2011年3月初至5月对白洋淀菹草(Potamogeton crispus)的生长参数进行了连续观测,以探索白洋淀菹草的生长规律.结果表明,白洋淀菹草的生长过程遵循Logistic增长模式,方程为Y=121.419/(1+42.814e-0.843 t)(R2=0.896,n=7).其最大日增生物量为25.59g/(m2.d),环境容纳量为121.419g/m2.白洋淀菹草各构件间呈极显著的线性关系.研究发现4月到5月初是白洋淀菹草的迅速增长期,此后则进入凋亡和腐败期,建议在石芽成熟期(5月初)对菹草进行收获,以避免氮磷营养盐的再释放对白洋淀水质的影响.
Gowth parameters of Potamogeton crispus in Baiyangdian Lake were measured continuously from March to May in order to understand its growth process. The results showed that the growth of P. crispus was fitted to logistic equation Y= 121. 419/（1＋42. 814 e^-0.843t） （R^2 =0. 896,n=7）, which maxi- mum increase rate of biomass was 25.59 g/（m^2 · d）,and carrying capacity was 121. 419 g/m^2. There exis- ted significant linear relations among modules of P. crispus. P. crispus in Baiyangdian Lake grew abrupt- ly from beginning of April to beginning of May, and then decayed. It was suggested that plant should be harvest to avoid the deterioration of water quality due to nitrogen and phosphorus nutrient release of detri tus in its mature period.
出处
《河北大学学报（自然科学版）》
CAS
北大核心
2012年第2期187-192,共6页
Journal of Hebei University(Natural Science Edition)
基金
水体污染控制与治理科技重大专项基金资助项目(2009ZX07209-008-05)
河北省科学技术研究与发展指导计划项目(06276905)
关键词
菹草
生长参数
线性分析
白洋淀
生长模型
Potamogeton crispus
growth parameter
linear analysis
Baiyangdian Lake
growth model
