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Studies on evaluation techniques of anthelmintic efficact by fecal egg counts in cattle naturally infected with helminths
1984
Jee, C.H. | Jang, D.H. | Youn, H.J. (Seoul National Univ., Suwon (Korea R.). Coll. of Veterinary Medicine)
In the evaluation of anthelmintic efficacy by fecal egg counts for cattle naturally infected with helminths, the reasonable technique of fecal egg counts and the reliable guidelines were determined. Modified technique of Harashigeru and Kim's sedimental tube was the most reasonable in fluke egg counts. Universal egg counting technique was preciser than McMaster egg counting technique and was lower in coefficient variation. Fecal egg counts of pretreatment should be carried out twice and mean of the egg should be calculated
显示更多 [+] 显示较少 [-]Характеристика качества яиц кур кросса Беларусь аутосексный
2009
Sviridova, S.N. | Makhnach, V.S. | Dmitrieva, T.V., National Academy of Sciences. Scientific and Practical Center of Animal Breeding (Belarus). Belarus Regional Experimental Poultry Station
Into the programme hen selection of Belarus Autoseksnyj cross there was introduced the indeks of the so-called quality of eggs which is defined by removal defective on quality of a shell of eggs in 30 and 52-week age. The size of variability of an indicator of 16,0-25,4% and hehtability 0,3-0,4 allows to lead selection on increase in an exit of qualitative eggs. Influence on quality of eggs with defects of a shell of age of hens, intensity eggs, weights of eggs, a linear accessory is established
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