摘要
黑颈鹤（Ｇｒｕｓｎｉｇｒｉｃｏｌｉｓ）在草海越冬期间共取食４７种植物（天然植物３８种，栽培植物９种）。莎草科植物是主要食物，占７６．５４％，栽培植物仅占２．１４％。植物地下块茎是黑颈鹤取食的主要部位，占３５．１４％，其次为秆状茎、花果（种子）和叶。块状茎几乎全来自莎草科植物。酸模的种子占全部花果（种子）类食物２７．５４％，比重很大，尤其在越冬前期。我们还对５种主要食物植物或其部位进行了方差分析，得出的结论是食性的季节性差异是主要的，且非常显著（Ｆ值〉５．８７，ｄｆ１＝４，ｄｆ２＝７０）。
species of plants were found in the diet of Black-necked Cranes wintering at Caohai Nature Reserve in southwest China, 38 of which were natural plants, 9 cultivated plants. Sedges (7 species) are the major food source, accunting for 76.54%, cultivated plants only 2.14%. Underground-tuber is a main fragment type consumed, accounting for 35.14%, most tubers from sedge family. Seeds of Rumes acetosa account for 27.54% total food items of seeds and flowers. The results of an analysis on variance for five main food plant species. suggested that main sources of variance are due to the month rather than duplicate slides. This variation in the diet is significant (F>5.87, df1=4, df2=70).
关键词
鸟纲
黑颈鹤
食性
越冬期
显微分析
Black-necked Cranes, Food habits, Microscopic analysis, Wintering
