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Production Performance of BLRI Developed Crossbred Layer Genotypes Under On-farm Condition

N. Nahar
Poultry Production Research Division, Bangladesh Livestock Research Institute, Savar, Dhaka-1341, Bangladesh

M. N. Islam
Poultry Production Research Division, Bangladesh Livestock Research Institute, Savar, Dhaka-1341, Bangladesh

N. R. Sarker
Poultry Production Research Division, Bangladesh Livestock Research Institute, Savar, Dhaka-1341, Bangladesh

M. S. Uddin
Poultry Production Research Division, Bangladesh Livestock Research Institute, Savar, Dhaka-1341, Bangladesh

Abstract/ Executive Summary:

The experiment was conducted with RIR x BPR, RIR x WR and WR x WLH crosses developed by Bangladesh Livestock Research Institute to assess their production performance under farmer's conditions. A total of 1800 straight run day old chicks of three genotypes having 600 in each crosses were distributed among the nine farmers with 200 chicks to each farmer i.e. each cross had three replications. The productive performance of the crosses were studied up to 36 weeks of age. All the experimental birds were reared in open-sided bamboo made slated house with straw based gable type roof. The study reveals that the live weight gain was significantly (p<0.01) higher in RIR x WR 6t 8 weeks of age compared to other two crosses but at 20 weeks of age the RIR x BPR cross obtained significantly (p<0.001) higher body weight than that of RIR x WR and WR x WLH crosses. While, the feed conversion efficiency of RIR x BPR cross was significantly (p<0.01) higher at 8 weeks of age but at 20 weeks of age there was no significant difference (p>0.05) in feed conversion efficiency among the genotypes. Further, it was indicated that the WR x WLH cross produced the highest number of eggs (p<0.001) compared to other genotypes during 24 to 36 weeks of laying period. Earlier peak egg production was obtained in RIR x WR cross (192d), which was significantly higher (p<0.01) than that of other two crosses. The mortality percentage was lowest in RIR x WR cross-compared to others. Therefore, it may be concluded that the WR x WLH cross will be suitable as layer genotype and RIR x WR cross may be reared as cockerel (meat) production because their growth was higher at early 8 weeks of age.

Keywords: Farm condition, Crossbred Chicken, Egg production

Location: In Bangladesh

Start Date:

End Date:

Program Area: Variety and Species

Commodity: Layer, Adoption of technology

Objectives:

To investigate the potentiality of BLRI developed crossbred chicken under farmer's condition and also to evaluate their adaptability under rural conditions.

Methodology:

The experiment was conducted with RIR x BPR, RIR x WR and WR x WLH crosses developed by Bangladesh Livestock Research Institute which were produced from pure lines, to assess their production performance under farmer's conditions at Dinajpur Technology Testing Centre. A total of 1800 straight run day old chicks of three genotypes were distributed among the nine farmers and their productive performance were studied up to 36 weeks of age. Housing and management: The chicks were housed in an open-sided straw-made roof. The floor was 0.6 m above the ground level, prepared by slated bamboo. The house was cleaned, washed, dried and then disinfected before the start of the experiment. 1.5 square feet floor space was allocated for each bird. Two types of feeders were used for the experiment. For the first 15 days, long trough feeders were used and during the last period of the experiment round plastic basins, 40 cm in diameter and 10 cm deep were used. Brooding \Was done by using battery brooders. Health status of birds during the brooding period was monitored every day and the mortality of birds was recorded. The birds were vaccinated against the major diseases including Newcastle and Gumboro disease as per the vaccination schedule developed by BLRI. Formulation of diets: The ingredient used and the nutrient composition for the starter and layer diets, which was formulated according to the recommendation of Kosaka, 1993. The birds under the experiment fed mash feed from the day of the start that contained 2939 Kcal ME/kg DM, 21.19% crude protein, 3.23% crude fiber, 1.18% calcium and 1.06% phosphorus (analyzed value) up to 8 weeks of age, thereafter a grower diet was fed up to 18 weeks of age and then a layer diet was fed during laying. The experimental birds were reared in an open-sided slat house made of mainly locally available materials. The birds were fed ad libitum on diets procured by farmers from local markets under an intensive management system throughout the experimental period. Vitamin mineral premix supplied nutrients equivalent to per kg feed: Vitamin A -50000 IU, Vitamin D3-11000mg, Vitamin Bi 1.875mg, B2 12.5mg, Nicotinic acid 62.5 mg, Calcium pantothenate 31.25mg, B12 0.0375mg, K3 6.25 mg, Vitamin E 62.50mg, Biotin 0.125mg, Folic acid 2.50mg, Choline chloride 625.00mg, Cobalt 1.00mg, Copper 20.00mg, Vitamin K3, Iron 80.00mg, Iodine 2.00mg, Manganese160.00mg, Zinc 100.00mg, Selenium 0.4mg, Spirimycin 12.50mg, 3-nitro 125.00mg, DLmethionine 125.00mg and BHT12.50mg. Performance data recording: Body weight of day-old chicks was taken initially and then weighted weekly thereafter. All birds were weighed individually, before morning feeding and offering of water. Diets were offered ad libitum twice a day in the morning and in the evening. The residues were gathered and weighed on the following morning to calculate the actual intakes. Feed intake including leftover was recorded daily and was calculated from the difference between offer and leftover. Feed conversion ratio (FOR) was recorded for the whole period as total feed intake (kg) per kg weight gain. Performance parameters like live weight gain, feed intake, feed efficiency, egg production, egg weight and mortality were recorded and analyzed through a simple statistical program by computer using SPSS 10.5 version. The least Significant Difference (LSD) was used to determine test of significant differences among the treatment means.

Source of Information: J. Bangladesh Agril. Univ. 4(1): 117-121, 2006; ISSN 1810-3030

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Day-old body weight was significantly higher (P<0.05) in R1RxWR cross than 2 other crosses, which was actually unavoidable. At 8 tn week, the same cross remained significantly heavier in body weight (P<0.01) among the genotypes but at 20 weeks of age RIR x BPR cross attained.bi.ghest body weight (P<0.001). This result is in agreement with the findings of Pratihar etal. (1996), where they got higher body weight in the crossbred chicken involving RIR at 20 weeks of age. Live weight gain of the 3-genotypes up to 20 weeks of age is shown in figure1. Feed intake did not differ significantly at any stage of feeding among the genotypes. At 8 weeks of age feed conversion ratio varied significantly (P<0.01) among the genotypes and best ratio was found in RIR x BPR cross (2.93 vs. 2.98 and 3.13 respectively for RIR x WA and WA x WLH), perhaps this is due to genotypic ability of RIR and BPR to convert feed into meat more efficiently than RIR and WA or WA and WLH at early age but at 20 weeks of age the genotypes minimized the difference in feed conversion. The average hen day egg production on 24-36 weeks of laying (%) differed significantly (P<0.001) among the genotypes (81.31, 76.23 and 76.20 respectively for WA x WLH, RIR x BPR and RIR x WA cross). Production of higher egg production in the crossbred chicken was observed in earlier work of Islam et al (2005) and Chowdhury et al., (1983), where they got 77.28% egg production in of RIRxWLH cross. RIR x WA cross attained earlier(192d) at peak egg production (P<0.01) than WA x WLH cross (199d) and RIR x BPR cross. Egg weight was highest in WA x WLH cross (P<0.01) followed by RIR x BPR cross and RIR x WA cross. Differences in mortality % was non-significant among the genotypes up to 20 weeks of age but at 36 week of age RIR x BPR accounts least mortality rate. Total mortality % at 36 weeks of age differed significantly (P<0.05) and this was lowest in RIR x WA cross .(3.1".7.), highest in WA x WLH (9.47) and intermediate in RIR x BPR cross.

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