熊有管与无管取胆的对比分析

对某熊场的胆粉产量作统计，无管取胆胆粉产量的累计绝对值在有管前4年和前5年之间，有管处理的前4年产值相对略低，而与长期产值相比明显高．有管取胆的引流系数，每只年产、日产绝对值，年产、日产累计绝对值，每头年产累计实产值等，随取胆年限趋于逐渐下降。而胆囊报废、熊只死亡、采胆空白率（停产）均呈逐年上升．使产值逐年下降的最重要的因素是熊只死亡，报废因素占第2位，故障等其他因素占次要地位．

Comparison of taking bear gall with cannulation or not

The statistics of bear gall output in one bear farm showed that accumulative absolute value of gall output without using cannulation was between that of four years ago and five years ago taked by cannulation. The output in four years taken with cannulation was relative lower than that in long-term. The drainage coefficient, absolute output of annual output and daily output, accumulative absolute value of annual output and daily put, annual accumulative realistic output declined gradually, but the scrapping of gall bladder, bear death and no output ascended gradually. The most important factors caused the declined output was the death of bears, the scrapping was the second and the malfunction and other factors were secondary.