【摘要】 对三江平原毛果苔草 狭叶甜茅 (Carexlasiocarpa Glyceriaspiculosa)湿地和小叶章 (Deyeuxiaangusti folia)湿地的植物、土壤和地表积水进行P、K含量测定 ,运用一元非线性回归分析对P、K元素含量季节动态特征进行了探讨 .结果表明 ,不同种类的湿地植物、同种植物的不同器官其P、K含量存在差异 ,但总特点是K含量高于P含量 ,说明湿地植物具有富集K的特性 .两类湿地土壤P、K全量、速效量的剖面分布特征也不同 .各层土壤全K含量均高于全P含量 .植物、土壤和地表积水中P、K含量均有明显的季节动态变化 ,一元非线性回归模拟均得到较理想的模拟模型 ,相关系数大多在 0 9以上 ,F检验较显著 .更多还原

【Abstract】 From May to October in 1997, the plant,soil and logging water in the wetlands were sampled monthly,and their P and K concentrations were measured.With the method of one-factor non-linear regression analysis,the seasonal dynamics of P and K in two types of wetland i.e.,in Carex lasiocarpa-Glyceria spiculosa wetland and in Deyeuxia angustifolia wetland were studied.The concentrations of P and K varied with different species of wetland plant and different organs of the same plant species.But their common property was that the concentration of K was higher than that of P,which shows that the mire-wetland plants had the property of enriching K element.The concentrations of P and K had an obvious seasonal dynamics in plant,soil and logging water,but the patterns were not the same.Some simulation models were obtained,which could be used to forecast the seasonal dynamics of P and K contents.更多还原