【摘要】 从 1 991年 5～ 8月、 1 992年 7～ 8月、 1 993年 4～ 7月、 9～ 1 0月在马边县大风顶自然保护区大熊猫观察站约 40km2 的研究区域内 ,进行野外跟踪调查 ,并将各种竹子及大熊猫新鲜粪便按不同季节进行随机采样烘干后在室内进行Cu、Zn、Mn、Fe、K、Ca、Mg等 7种元素的测定分析。结果表明 ,大熊猫在不同时期对 7种元素的总量或某一种元素的摄入都不相同 ,这是通过选择不同的食谱即改变食性而实现的 ,并由于各期有不同的生命活动 (特别是繁殖活动 )所引起的。更多还原

【Abstract】 Having followed giant pandas tracks and investigated the feeding behaviors in Mabian Natural Reserve from May to August,1991, July to August, 1992, April to July and September to October 1992, the authors sampled randomly all kinds of bamboos and pandas fresh droppings according to different seasons. After staving these samples, the authors determined and analyzed 7 kinds of trace elements in them. The authors think that the intake of amounts of all elements or one special element is different in different period and the selection for trace elements is achieved by the selection for different recipes (i.e. giant pandas change their food habits in order to select the elements which they demand).The selection is caused by different physiological action in different period, especially, the reproduction action.更多还原