National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
A study was carried out to assess the impact of shelter designs on the production performance of dairy cattle in the three selected agro – climatic zones of Tamil Nadu, viz. Southern, Cauvery delta and High rainfall zones. The effects of various shelter designs on the haematological parameters were analyzed. The whole blood samples were collected throughout the year i.e. in all the four seasons, viz., winter, summer, south-west monsoon and north-east monsoon. For each season, a total of thirty samples (in duplicate) were collected from five housing types, each comprising of six individual cattle from the three agro-climatic regions for measuring the haematological profile. The blood parameters, namely WBC count, RBC count, Hb, HCT, MCV, MCH, MCHC, RDW, PLT, MPV, PDW and PCT were estimated using automated haematology analyzer in all the above samples. The results of WBC count, MCH, MCHC and PCT values showed significant difference between all the four seasons in all the three agro-climatic zones, while the results of RBC count, Hb, HCT differed significantly between all the four seasons in Cauvery delta and Southern zones and PLT values differed significantly between seasons in the Southern and High rainfall zones. With respect to housing types, besides the seasonal variation mentioned above, the results of MCV differed significantly in Cauvery delta and High rainfall zones, while the results of WBC count and MCHC differed significantly only in Cauvery delta zone. The interaction between the influence of Seasons and Housing types on haematological profile showed significant differences for PDW in High rainfall zone and for PCT in Cauvery delta zone. Factor analysis study of this haematological profile with other climatic, biochemical and production parameters in all the three zones revealed that in Southern and Cauvery delta zones open housing is best and in High rainfall zone thatched roof system is the best.
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