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为了保护森林益鸟资源,我们在青顶子林场先后挂置各式鸟箱425个,在对比各式巢箱招引效果的同时,重点对树洞式鸟箱招引率进行了观察,其情况如下: 一、树洞式巢箱制作方法树洞式巢箱须选长25—45厘米,小头直径在9—28厘米的木段或烂心木段。首先在木段上端和下端各3厘米处锯断,留做顶和底盖,然后把剩下的木段在中间劈成两半,将中间抠空,周围壁厚1.5—2.0厘米,靠上段近边缘处,可任意选一位置做出入孔,然后用铁丝把两
In order to protect the forest Yiru resources, we have set up 425 various types of bird boxes in the Greentop Farm. In contrast with the various types of nesting boxes, we also observed the attraction rate of tree-hole type bird boxes as follows: First, the tree-hole nest box production method Tree-hole nest box to be selected length 25-45 cm, small head diameter of 9-28 cm wood section or bad heartwood section. First of all in the wood at the top and bottom of the 3 cm sawing, leaving the top and bottom cover, and then split the remaining pieces in the middle split in half, hollow the middle of the wall thickness of 1.5-2.0 cm, by the upper section Near the edge, can choose a location to make a hole, and then use the wire to two