亚洲AV成人精品午夜一区二区,啊灬啊灬啊灬快灬深高潮啦,福利午夜视频在线,caoporn超碰发布页,5566av资源网影音先锋,狠狠躁日日躁夜夜躁A片男男

Generally, when we use duck equipment to incubate ducks, we need to observe the development when the shells are broken. Pratt & Whitney duck equipment will take you to understand the observation when pecking the shells and hatching.
The time from pecking the shell to hatching is about half a day. We must pay attention to the temperature and humidity, density and ventilation control, especially the hatching on the bed.
Observation of newborn chicks: mainly observe the vitality and health level, weight, yolk absorption, villus color and length of the ducklings, and distinguish the healthy and weak remnant chicks. The well-developed chicks have strong physique, lively spirit, proper weight, complete absorption of yolk and good healing of umbilicus. Fluff is neat, pigment is fresh and thick, length is suitable. In addition, we should also pay attention to whether the ducklings are deformed, howling, blind, bent bones, foot and head paralysis, etc.
Observe whether the time of pecking and shelling is normal. If there is a lack of vitamins or the temperature is too low, the pecking time will be prolonged; if the temperature is too high, the pecking time will be advanced, and the pecking time will be advanced or delayed, which will reduce the hatchability and ducklings quality. Therefore, the observation should be recorded in detail and compared with the normal pecking time, and a comprehensive analysis should be carried out to improve the hatchability of the next batch of duck eggs Do.
When hatching is normal, the hatching time will be relatively consistent, and there will be obvious peak of hatching, generally all hatching will be completed in 21 days; when hatching is abnormal, there will be no obvious peak of hatching, and the hatching lasts for a long time, and there are still many embryo eggs without broken shells on the 22nd day.
Therefore, when the duck egg pecks the shell and comes out the young, it is necessary to make preparations in advance to ensure the normal incubation of the duck egg.