五龄饷食时间与盛熟时间及茧产量的关系

对四龄止桑后的同批蚕进行早、中、晚三种饷食时问的比较，其四鼠就鼠时间分别为30、36、48小时。以此探讨五龄饷食迟早与盛熟时间及茧产量的关系。结果晚上饷食区的盛热时间比早上、中午饷雷区晚，但盛熟均在白昼。产茧量随饷食对间的推迟有下降的趋势。

The relation of first feed time at the fifth instar to mass mounting time and yield of cocoons

To inquire into the relation of first feed time of the fifth instar to time of mass mounting and yield of cocoons,the trials of first feeding at the time of morning ,afternoon and night were conducted in the simultaneous rearing silkworm .The time of 4th molting was separated at 30h,36h,48h. The results showed that the time of mass mounting at night first feeding was later than in both morning and afternoon ,and the yield of cocoon came down as the time delay of first feeding.