A method for improving hatchability and chick viability of Tibetan chickens in high-altitude areas

Abstract

The invention relates to a method for improving the hatching rate of Tibetan chickens and the vitality of chicks in high-altitude areas. In high-altitude areas where Tibetan chickens are raised, breed eggs of Tibetan chickens are hatched in an incubator. During the incubation period, the oxygen concentration in the incubator is increased, and the incubator is adjusted at the same time Internal temperature and humidity, the incubation temperature is 37.2-38.2°C, the relative humidity is 60%-65%, and the oxygen concentration in the incubator is maintained at 30%-35% during the incubation period. The method of the invention increases the oxygen intake of the embryo, improves the development speed and robustness of the embryo, increases the hatching rate by more than 2 times, and increases the survival rate of chicks by more than 5 times. At the same time, based on the characteristics of Tibetan chickens, it is further proposed to add oxygen in stages, 1-14 days to continue to add oxygen, 15 days to stop oxygenation after hatching, and use plateau normal oxygen. The hatching rate obtained by this oxygenation method is higher than that of the whole oxygenation. The operation method of the method of the invention is clear, simple and easy to implement, safe and reliable for operators, and can be implemented in large-scale breeder farms.

Description

technical field [0001] The invention relates to poultry hatching technology, in particular to a method for improving the hatching rate of Tibetan chickens in high altitude areas and the viability of chicks. [0002] technical background [0003] Tibetan chicken, as one of my country's excellent local chicken breeds, was listed in the "National Variety Resources Protection List" in 2000, and was included in the "National Livestock and Poultry Genetic Resources Protection Variety List" in 2006 by the Ministry of Agriculture. Tibetan chickens live in semi-agricultural and semi-pastoral areas at an altitude of 2,200 to 4,100 meters, in the valley areas of the middle reaches of the Yarlung Zangbo River, and in the alpine and canyon areas of the middle reaches of the Three Rivers in Eastern Tibet. One of the landraces. Tibetan chickens are distributed in Lhasa, Shannan, southeastern Qamdo, central and southern Shigatse, eastern Nagqu, and southwestern Ngari in Tibetan areas. The ...

AI Technical Summary

Problems solved by technology

However, the hatching rate of traditional domestic Tibetan chickens is very low, less than 20%. Therefore, providing local Tibetans with sufficient, healthy and cheap Tibetan chicken chicks has become a difficult problem for large-scale agricultural and animal husbandry enterprises

[0004] In order to improve the hatching rate of Tibetan chickens, there are three ways to hatch large-scale Tibetan chickens. The first method is to transport the eggs of Tibetan chickens to low-altitude areas for hatching. The advantage is that the hatching rate can be increased to more than 85%. Chicken chicks transported to high-altitude areas for breeding will produce a relatively large stress response; the second is to use the conventional incubation method of incubators to incubate Tibetan chicken eggs in high-altitude areas. The advantage is that the chicks have no stress response, but the disadvantage is that the hatching rate is low , The incubation period is long, the incubation rate is only more than 20%, and the incubation period is 22-23 days; the third is to use the incubator to adjust the incubation method at the same time, such as adjusting the oxygen concentration and temperature and humidity. This method should be the most scientific , but according to the characteristics of Tibetan chicken itself, the adjustment method of oxygen concentration and temperature and humidity has a great influence on the hatchability, and there is no research report on improving the hatchability and chick viability of Tibetan chickens in high altitude areas.

[0005] Most areas of the Qinghai-Tibet Plateau are above 4000m above sea level, higher in the northwest and lower in the southeast. Although the hatching rate of Tibetan chickens can reach more than 85% in areas with lower altitudes such as Nyingchi, the wider areas of Tibet are at an altitude of about 4000m or even higher. These areas are in Under the harsh conditions of high cold, low oxygen and strong radiation, the oxygen content in most areas is less than 13%, which is 8% different from sea level, and the air pressure is lower, and the oxygen partial pressure is lower. Under normal oxygen concentration, the oxygen partial pressure at an altitude of 2500m is about 15kPa, the oxygen partial pressure is about 12kPa at an altitude of 4500m, and the climate is dry, which restricts the local animal husbandry production and economic development

Images