This study evaluates egg-laying patterns and egg quality parameters of the local Sakini chicken breed in Nepal, focusing on three agro-ecological zones (AEZ): Terai, Mid-Hills, and High-Hills. The findings reveal:
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Egg Production: Sakini chickens from the High-Hills produced the most eggs per hen per year (140), compared to Terai (99.9) and Mid-Hills (95.8).
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Egg Quality: Eggs from High-Hill Sakini chickens were superior in terms of weight (47.45g), yolk weight (13.6g), and albumen weight (29.28g). Additionally, egg volume (42.02 cm³) and surface area (73.06 cm²) were also highest in the High-Hill group.
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Genetic Potential: The study suggests that High-Hill Sakini chickens have the potential for better reproductive fitness and egg quality. This could be valuable for improving the breed in other regions of Nepal through selection and crossbreeding.
Detailed Insights
What makes Sakini chickens significant in Nepal?
Sakini chickens are an important source of protein and income for rural communities in Nepal. These local chickens are hardy, adapt well to harsh environments, and are particularly valuable for their ability to lay eggs and produce meat in low-resource settings. Unlike commercial chickens, Sakini chickens are often raised in free-range systems, requiring minimal care while providing significant benefits.
Despite their popularity, Sakini chickens have traditionally been poor performers in terms of egg production compared to commercial breeds. This study explores ways to enhance their reproductive fitness and egg quality, with a focus on the impact of agro-ecological zones (AEZs) on these parameters.
What were the key findings on egg laying?
The study found that Sakini chickens from the High-Hills (altitude of 2200-2500 meters) laid the highest number of eggs per hen per year at 140 eggs. This was significantly higher than those from the Terai (99.9 eggs) and Mid-Hills (95.8 eggs). The results suggest that the High-Hills environment, characterized by cooler temperatures and possibly less intensive farming practices, fosters higher egg production in this breed. This may indicate that altitude and environmental conditions play a role in the reproductive fitness of Sakini chickens.
How does egg quality compare across different AEZs?
Egg quality was measured across multiple parameters, including egg weight, egg volume, shell thickness, and yolk weight. Key results include:
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Egg Weight (EW): Sakini eggs from the High-Hills were the heaviest (47.45g), followed by Terai (42.69g) and Mid-Hills (43.55g).
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Egg Volume (EV): The eggs from the High-Hills had the highest volume at 42.02 cm³, while the eggs from the Terai and Mid-Hills had lower volumes (39.51 cm³ and 38.92 cm³, respectively).
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Yolk Weight (YW): The High-Hills Sakini eggs had the highest yolk weight (13.6g), which is crucial for overall egg quality, particularly for nutrition and hatching success.
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Albumen Weight (AW): High-Hills eggs also had the highest albumen weight (29.28g), which impacts egg white quality and its role in protecting the yolk.
These findings underline that Sakini chickens from the High-Hills not only lay more eggs but also produce superior quality eggs in terms of size, yolk content, and albumen weight.
What other egg quality parameters were considered?
Other important quality parameters, such as shell thickness (ST), surface area (SA), shape index (SI), and breaking strength (BS), were also assessed:
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Shell Thickness (ST): The Mid-Hills eggs had the thickest shells (0.59 mm), while the High-Hills and Terai eggs had slightly thinner shells.
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Surface Area (SA): The surface area of the High-Hills eggs was the largest (73.06 cm²), making them more robust and less prone to damage during handling.
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Shape Index (SI): The shape index, a measure of egg shape (ratio of breadth to length), was highest for the Terai eggs (0.77) and lowest for High-Hills eggs (0.75). This suggests that while the High-Hills eggs were slightly more elongated, they still had excellent quality.
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Breaking Strength (BS): The eggs from High-Hills had the highest breaking strength (1718.74g), which indicates stronger eggs that are more resistant to cracking during transportation.
These parameters highlight the overall superior quality of eggs produced by Sakini chickens in the High-Hills, particularly in terms of strength and durability, which are essential for both marketability and incubation success.
FAQ
1. How does altitude affect egg production in Sakini chickens?
Chickens from higher altitudes (such as the High-Hills) were found to produce more eggs per hen per year, suggesting that altitude and environmental factors play a role in improving reproductive fitness.
2. Why are eggs from High-Hills Sakini chickens considered superior?
Eggs from High-Hills chickens were found to be heavier, with larger volumes, better yolk and albumen content, and stronger shells compared to eggs from Terai and Mid-Hills chickens.
3. What is the significance of shell thickness in egg quality?
Shell thickness is crucial for protecting the egg’s internal contents during handling, transportation, and storage. Thicker shells contribute to better-quality eggs that are less prone to breakage.
4. What factors influence egg quality in local chickens like Sakini?
Egg quality in Sakini chickens is influenced by genetic factors, environmental conditions, and the specific management practices applied. The study suggests that altitude and the local environment are key factors in determining egg quality.
5. How can the results of this study help improve local chicken breeds in Nepal?
By identifying the superior reproductive and egg quality traits of Sakini chickens from the High-Hills, the study suggests that these chickens can be used for breeding programs to improve egg production and quality in other regions of Nepal.
Conclusion
The study on Sakini chickens from Nepal demonstrates the significant impact of agro-ecological zones on egg production and quality. Chickens from the High-Hills not only laid more eggs but also produced superior quality eggs with higher weight, yolk, and albumen content, as well as stronger shells. These findings provide valuable insights for improving local chicken breeds in Nepal through targeted selection and breeding programs. By focusing on the genetic potential of these chickens and optimizing environmental factors, it is possible to enhance the productivity and quality of eggs, contributing to the livelihoods of rural farmers and improving food security.
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