【摘要】 以盐城国家级自然保护区人工饲养的丹顶鹤98、99年两个繁殖期所产卵的人工孵化情况为材料,研究丹顶鹤卵的特征、孵化周期及孵化过程中鹤卵的失重规律。结果表明:丹顶鹤卵重256克左右,呈椭圆形,鹤卵孵化期为32天左右。鹤卵的失重规律为前快、中慢、后快。认识鹤卵孵化过程中的特点,有助于提高孵化率。更多还原

【Abstract】 The experiment which conducted in Yancheng Nature Reserve was to study the feature,incubation cycle and weightless regulation about eggs of Red-crowned cranes.The results indicated that the egg’s weight and the period of incubation were about 256g and32days respectively,the egg’s weightless showed staged variation as well.All stud-ies are helpful to improve incubative efficiency of red-crowned cranes.更多还原