不同种植方式下芦苇生长和群落特征

Interannual variation of the characteristics of two artificial reed communities in South Lake of Shumu Garden

分别将白洋淀芦苇和本地芦苇按斜茎法和起墩法栽种到吴忠黄河湿地树木园南湖,对比两种栽种方式下芦苇的各项生长指标和地上生物量,并选取4个多样性指数分析其群落特征的年际变化。结果表明:①斜径法栽种的白洋淀芦苇已适应吴忠湿地生态环境,各项生长指标和地上生物量均逐年上升;起墩法栽种的本地芦苇株高和株径在3年中都呈上升趋势,芦苇的地上生物量、盖度、多度、展叶数和节数的年际变化规律基本一致,先增大后减小。②两种栽种方式下的芦苇群落优势度、丰富度与均匀度呈反比。③3年间芦苇重要值斜茎法均大于起墩法,斜茎法栽种的白洋淀芦苇确立了单一优势种的地位,起墩法栽种的本地芦苇逐渐被香蒲取代其建群种地位。

The oblique stem planter was selected from Reeds in Baiyangdian,and the vertical stem planter was selected from local reeds in Nanhu,Wuzhong Yellow River Wetland arboretum.The growth indexes and aboveground biomass of the reeds under the two planting methods were compared,and four diversity indexes were selected to analyze the interannual changes of the community characteristics.The results showed that:①the Baiyangdian reed was adapted to the ecological environment of Wuzhong wetland,and the growth index and abovementioned biomass increased year by year.The pier method of local reed plant height and stalk diameter is on the rise in three years,reed,aboveground biomass,coverage,abundance,exhibition leaf number and section number of interannual change rule,in the form of single peak,first increases then decreases②under two planting ways of reed community dominance index,richness and evenness inverse association③three years reed important value inclined stem were greater than the pier,inclined stem method of Baiyangdian reed has established a single dominant position,the method of pier planting local reeds gradually replaced by typha as building group.