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1 Overall situation
The opening time of 3 geese was all in September and ended in April of the following year. In the whole period, the number of goslings for three groups of geese was 54, 67, and 88 respectively. The egg production was 1,660, 2,069, and 2,819 eggs respectively. The average egg production per wehen was 30.7 pieces and 30.9 pieces respectively. 32, the overall average is 31.3. The average number of eggs produced by each group of geese was compared with the overall average, and the t-test showed no significant difference (P>0.05), indicating that there was no significant difference in the individual egg production of the 3 geese during the egg production season, and the overall situation was similar.
2 During the three egg-laying periods, the number of eggs produced by three groups of geese in the first laying period was 393, 418, and 644, respectively. The average number was 7.28, 6.24, and 7.32, respectively. The overall average was 6.95; The egg period was 563, 656, and 947, with an average of 10.43 pieces, 9.79 pieces, and 10.75 pieces, with a total of 10.32 pieces. The third egg production period was 731 pieces, 995 pieces, and 12,28 pieces, respectively. 13.01 pieces, 14.85 pieces and 13.95 pieces, all 14.03 pieces. The percentage of eggs laid by three groups of geese in the first laying period was 23.7%, 20.2%, and 22.9%, respectively. The second laying period was 32.2%, 31.7%, and 33.6%, respectively. The third laying period was It is 44.1%, 48.1%, and 43.5%. Overall, egg production during the first production period accounted for 22.3% of the total egg production, the second production period was 32.5%, and the third production period was 45.2%. From the analysis of the data, it can be seen that the egg production of Lionhead geese is mainly concentrated in the third egg production period, which is nearly half of the total egg production season. From the point of view of the average number of eggs produced during the three production periods, the later laying period only produced 3.5 eggs more than the preceding laying period, which was close to a regular variation of the arithmetic progression.
3 Egg production rate
The average egg laying rate of the three geese was 12.8%, 12.8%, and 13.3%, respectively. The highest egg production rates of the three geese were all concentrated in December, and the egg production rates were all above 20% and the highest was close to 25% with an average of 22.1%. . In other words, the peak period of egg production is in the second egg production period; the minimum egg production rate in April is only 2.4% on average.
4 Discussion
4.1 For lion-headed geese with strong nesting characteristics, the swarming geese during their production should be awake in time. The timely processing of the geese in the nest will not directly affect the performance of the geese and laying eggs, especially the peak period of egg production. Therefore, for the geese resting on their nests during the first production period, they should add nutrients in time to ensure that the geese peak the peak period of production.
4.2 The peak period of egg production in Shitou goose was in December, which was obviously related to the external environment. At this time, the sunshine duration was short and the temperature was low. This played a significant role in the performance of the egg production performance of the Lionhead Goose. And the lion's geese like to adapt to the short-day behavior.
4.3 The highest egg production of Lion-headed geese in the third egg production period is almost half of the total egg production. This is related to the relatively long time of the third egg production period. It basically has more than 100 days of egg production time, and it is The egg production rate in February and March also maintained a relatively high level, and the rate of decline in egg production was not significant. It was only in April that the drop in egg production rate was more pronounced, which was also clearly related to the gradual increase in sunshine duration after the equinox season at the end of March. It can be seen that the long daylight is unfavorable to the production of eggs by the lion's geese. It also shows to some extent that the egg production performance of the lion's geese has a great relationship with changes in the external environment, especially changes in light and temperature. .
4.4 This is a simple analysis of the three egg-laying seasons of the lion's geese. Of course, there are many factors affecting the egg production of lion head geese, such as age, disease, feeding and management, and so on, which cannot be considered here. The research on the egg production law of Shitou Geese still needs a lot of work, and it is constantly discussed and analyzed. The egg production situation of the three lion-headed geese in this analysis cannot represent the egg production situation of this species. This requires continuous exploration in the future production work to accumulate more and more accurate materials for the production of lion head geese. Laws for more systematic and scientific research and analysis.
Analysis of egg production in three production periods of Shitou goose
Lion-headed geese is the only large-scale goose species in China, and it is one of the state-protected and outstanding local breed resources. The egg-laying season of Lionhead geese is from September each year to April of the second year. Its nesting ability is strong. It can be divided into three egg production periods in each egg production season. The first egg production period is from September to mid-November. The second egg production period is from mid-November to next year 1. In the second half of the month, the third egg production period is from late January to the end of egg production. This article makes a preliminary analysis of the production records of three lion head gooses in 2003-2004 and their egg production in three egg production periods.