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TY - JOUR
AU - Oyedeji, J. O.
AU - Ajayi, H. I.
AU - Olupitan, T.
PY - 2021/02/01
Y2 - 2026/08/25
TI - Effects of skip a day (SAD) feeding regime during rearing on the subsequent laying performance of Black Harco hens
JF - Nigerian Journal of Animal Production
JA - NJAP
VL - 38
IS - 2
SE - Articles
DO - 10.51791/njap.v38i2.2801
UR - https://mail.njap.org.ng/index.php/njap/article/view/2801
SP - 107 -114
AB - <p><em><span style="font-weight: 400;">One </span></em><em><span style="font-weight: 400;">hundred </span></em><em><span style="font-weight: 400;">and </span></em><em><span style="font-weight: 400;">fifty </span></em><em><span style="font-weight: 400;">(</span></em><em><span style="font-weight: 400;">150</span></em><em><span style="font-weight: 400;">) </span></em><em><span style="font-weight: 400;">black </span></em><em><span style="font-weight: 400;">harco </span></em><em><span style="font-weight: 400;">pullet</span></em><span style="font-weight: 400;">s </span><span style="font-weight: 400;">w</span><em><span style="font-weight: 400;">ere </span></em><em><span style="font-weight: 400;">used </span></em><em><span style="font-weight: 400;">in </span></em><em><span style="font-weight: 400;">a </span></em><em><span style="font-weight: 400;">study </span></em><em><span style="font-weight: 400;">designed </span></em><em><span style="font-weight: 400;">to </span></em><em><span style="font-weight: 400;">investigate the </span></em><em><span style="font-weight: 400;">effects </span></em><em><span style="font-weight: 400;">of </span></em><em><span style="font-weight: 400;">Skip </span></em><em><span style="font-weight: 400;">A </span></em><em><span style="font-weight: 400;">Day </span></em><em><span style="font-weight: 400;">(</span></em><em><span style="font-weight: 400;">SAD) </span></em><em><span style="font-weight: 400;">feeding </span></em><em><span style="font-weight: 400;">regimen </span></em><em><span style="font-weight: 400;">during </span></em><em><span style="font-weight: 400;">rearing </span></em><em><span style="font-weight: 400;">on </span></em><em><span style="font-weight: 400;">thei</span></em><em><span style="font-weight: 400;">r </span></em><em><span style="font-weight: 400;">laying </span></em><em><span style="font-weight: 400;">performance</span></em><em><span style="font-weight: 400;">. </span></em><em><span style="font-weight: 400;">Pullets </span></em><em><span style="font-weight: 400;">from </span></em><em><span style="font-weight: 400;">a </span></em><em><span style="font-weight: 400;">healthy </span></em><em><span style="font-weight: 400;">stock </span></em><span style="font-weight: 400;">w</span><em><span style="font-weight: 400;">ere </span></em><em><span style="font-weight: 400;">randomly </span></em><em><span style="font-weight: 400;">allocated </span></em><em><span style="font-weight: 400;">into </span></em><em><span style="font-weight: 400;">five </span></em><em><span style="font-weight: 400;">experimental </span></em><em><span style="font-weight: 400;">groups </span></em><em><span style="font-weight: 400;">at </span></em><em><span style="font-weight: 400;">1</span></em><span style="font-weight: 400;">2 </span><span style="font-weight: 400;">w</span><em><span style="font-weight: 400;">eeks </span></em><em><span style="font-weight: 400;">of </span></em><em><span style="font-weight: 400;">age</span></em><em><span style="font-weight: 400;">. </span></em><em><span style="font-weight: 400;">B</span></em><em><span style="font-weight: 400;">irds </span></em><em><span style="font-weight: 400;">in </span></em><em><span style="font-weight: 400;">group </span></em><em><span style="font-weight: 400;">I </span></em><span style="font-weight: 400;">w</span><em><span style="font-weight: 400;">ere </span></em><em><span style="font-weight: 400;">fed ad </span></em><em><span style="font-weight: 400;">libitum </span></em><em><span style="font-weight: 400;">daily</span></em><em><span style="font-weight: 400;">, </span></em><span style="font-weight: 400;">w</span><em><span style="font-weight: 400;">hile </span></em><em><span style="font-weight: 400;">those </span></em><em><span style="font-weight: 400;">in </span></em><em><span style="font-weight: 400;">groups </span></em><em><span style="font-weight: 400;">2</span></em><em><span style="font-weight: 400;">, </span></em><em><span style="font-weight: 400;">3</span></em><em><span style="font-weight: 400;">, </span></em><em><span style="font-weight: 400;">4 </span></em><em><span style="font-weight: 400;">and </span></em><span style="font-weight: 400;">5 </span><span style="font-weight: 400;">w</span><em><span style="font-weight: 400;">ere </span></em><em><span style="font-weight: 400;">subjected </span></em><em><span style="font-weight: 400;">to </span></em><em><span style="font-weight: 400;">SAD </span></em><em><span style="font-weight: 400;">feeding </span></em><em><span style="font-weight: 400;">regimen </span></em><em><span style="font-weight: 400;">for </span></em><em><span style="font-weight: 400;">2</span></em><em><span style="font-weight: 400;">,</span></em><em><span style="font-weight: 400;">4</span></em><em><span style="font-weight: 400;">,</span></em><em><span style="font-weight: 400;">6 </span></em><em><span style="font-weight: 400;">and </span></em><em><span style="font-weight: 400;">8 </span></em><span style="font-weight: 400;">w</span><em><span style="font-weight: 400;">eeks</span></em><em><span style="font-weight: 400;">, </span></em><em><span style="font-weight: 400;">respectively</span></em><em><span style="font-weight: 400;">. </span></em><em><span style="font-weight: 400;">Hens </span></em><em><span style="font-weight: 400;">in </span></em><em><span style="font-weight: 400;">all </span></em><em><span style="font-weight: 400;">groups </span></em><span style="font-weight: 400;">w</span><em><span style="font-weight: 400;">ere </span></em><em><span style="font-weight: 400;">thereafter </span></em><em><span style="font-weight: 400;">fed </span></em><em><span style="font-weight: 400;">ad </span></em><em><span style="font-weight: 400;">libitum </span></em><em><span style="font-weight: 400;">during </span></em><em><span style="font-weight: 400;">a </span></em><em><span style="font-weight: 400;">30</span></em><em><span style="font-weight: 400;">-</span></em><span style="font-weight: 400;">w</span><em><span style="font-weight: 400;">eek </span></em><em><span style="font-weight: 400;">laying </span></em><em><span style="font-weight: 400;">period</span></em><em><span style="font-weight: 400;">. </span></em><em><span style="font-weight: 400;">Birds </span></em><em><span style="font-weight: 400;">in </span></em><em><span style="font-weight: 400;">all </span></em><em><span style="font-weight: 400;">treatment </span></em><em><span style="font-weight: 400;">groups </span></em><em><span style="font-weight: 400;">had </span></em><em><span style="font-weight: 400;">unrestricted </span></em><em><span style="font-weight: 400;">acce</span></em><span style="font-weight: 400;">ss </span><span style="font-weight: 400;">to </span><span style="font-weight: 400;">w</span><em><span style="font-weight: 400;">ater </span></em><em><span style="font-weight: 400;">before, </span></em><em><span style="font-weight: 400;">d</span></em><em><span style="font-weight: 400;">uring </span></em><em><span style="font-weight: 400;">and </span></em><em><span style="font-weight: 400;">after </span></em><em><span style="font-weight: 400;">the </span></em><em><span style="font-weight: 400;">p</span></em><em><span style="font-weight: 400;">eriod </span></em><em><span style="font-weight: 400;">of </span></em><em><span style="font-weight: 400;">feed </span></em><em><span style="font-weight: 400;">restriction</span></em><em><span style="font-weight: 400;">. </span></em><em><span style="font-weight: 400;">Results </span></em><em><span style="font-weight: 400;">at </span></em><em><span style="font-weight: 400;">the </span></em><em><span style="font-weight: 400;">end </span></em><em><span style="font-weight: 400;">of </span></em><em><span style="font-weight: 400;">the </span></em><em><span style="font-weight: 400;">experiment </span></em><em><span style="font-weight: 400;">showed </span></em><em><span style="font-weight: 400;">that </span></em><em><span style="font-weight: 400;">total </span></em><em><span style="font-weight: 400;">number </span></em><em><span style="font-weight: 400;">of </span></em><em><span style="font-weight: 400;">eggs </span></em><em><span style="font-weight: 400;">laid </span></em><em><span style="font-weight: 400;">as </span></em><span style="font-weight: 400;">w</span><em><span style="font-weight: 400;">ell </span></em><em><span style="font-weight: 400;">as </span></em><em><span style="font-weight: 400;">Hen </span></em><em><span style="font-weight: 400;">Day </span></em><em><span style="font-weight: 400;">Production </span></em><em><span style="font-weight: 400;">(HDP</span></em><em><span style="font-weight: 400;">%</span></em><em><span style="font-weight: 400;">) </span></em><span style="font-weight: 400;">w</span><em><span style="font-weight: 400;">ere </span></em><em><span style="font-weight: 400;">significantly </span></em><em><span style="font-weight: 400;">highest </span></em><em><span style="font-weight: 400;">in </span></em><em><span style="font-weight: 400;">hens </span></em><em><span style="font-weight: 400;">previously </span></em><em><span style="font-weight: 400;">subjected </span></em><em><span style="font-weight: 400;">to </span></em><em><span style="font-weight: 400;">SAD </span></em><em><span style="font-weight: 400;">feeding </span></em><em><span style="font-weight: 400;">for </span></em><em><span style="font-weight: 400;">6 </span></em><span style="font-weight: 400;">w</span><em><span style="font-weight: 400;">eeks </span></em><em><span style="font-weight: 400;">during </span></em><em><span style="font-weight: 400;">rearing </span></em><em><span style="font-weight: 400;">(</span></em><em><span style="font-weight: 400;">p </span></em><em><span style="font-weight: 400;">< </span></em><em><span style="font-weight: 400;">0</span></em><em><span style="font-weight: 400;">.</span></em><em><span style="font-weight: 400;">05</span></em><em><span style="font-weight: 400;">)</span></em><em><span style="font-weight: 400;">. </span></em><em><span style="font-weight: 400;">Although </span></em><em><span style="font-weight: 400;">feed </span></em><em><span style="font-weight: 400;">intakes </span></em><em><span style="font-weight: 400;">of </span></em><em><span style="font-weight: 400;">pullets </span></em><span style="font-weight: 400;">w</span><em><span style="font-weight: 400;">ere </span></em><em><span style="font-weight: 400;">significantly </span></em><em><span style="font-weight: 400;">reduced </span></em><em><span style="font-weight: 400;">by </span></em><em><span style="font-weight: 400;">subjecting </span></em><em><span style="font-weight: 400;">pullets </span></em><em><span style="font-weight: 400;">to </span></em><em><span style="font-weight: 400;">periods </span></em><em><span style="font-weight: 400;">ranging </span></em><em><span style="font-weight: 400;">from </span></em><span style="font-weight: 400;">2 </span><span style="font-weight: 400;">– </span><em><span style="font-weight: 400;">8 </span></em><span style="font-weight: 400;">w</span><em><span style="font-weight: 400;">eeks </span></em><em><span style="font-weight: 400;">of </span></em><span style="font-weight: 400;">S</span><em><span style="font-weight: 400;">AD </span></em><em><span style="font-weight: 400;">feeding </span></em><em><span style="font-weight: 400;">during </span></em><em><span style="font-weight: 400;">rearing </span></em><em><span style="font-weight: 400;">(</span></em><em><span style="font-weight: 400;">p </span></em><em><span style="font-weight: 400;"><</span></em><em><span style="font-weight: 400;">0</span></em><em><span style="font-weight: 400;">.</span></em><em><span style="font-weight: 400;">05</span></em><em><span style="font-weight: 400;">)</span></em><em><span style="font-weight: 400;">, </span></em><em><span style="font-weight: 400;">fe</span></em><em><span style="font-weight: 400;">ed </span></em><em><span style="font-weight: 400;">intakes </span></em><em><span style="font-weight: 400;">duri</span></em><em><span style="font-weight: 400;">n</span></em><em><span style="font-weight: 400;">g </span></em><em><span style="font-weight: 400;">laying </span></em><em><span style="font-weight: 400;">period </span></em><span style="font-weight: 400;">w</span><em><span style="font-weight: 400;">ere </span></em><em><span style="font-weight: 400;">not </span></em><em><span style="font-weight: 400;">significantly </span></em><em><span style="font-weight: 400;">affected </span></em><em><span style="font-weight: 400;">(</span></em><em><span style="font-weight: 400;">p</span></em><em><span style="font-weight: 400;">></span></em><em><span style="font-weight: 400;">0</span></em><em><span style="font-weight: 400;">.</span></em><em><span style="font-weight: 400;">05</span></em><em><span style="font-weight: 400;">)</span></em><em><span style="font-weight: 400;">. </span></em><em><span style="font-weight: 400;">Ho</span></em><span style="font-weight: 400;">wev</span><em><span style="font-weight: 400;">er</span></em><em><span style="font-weight: 400;">, </span></em><em><span style="font-weight: 400;">feed </span></em><em><span style="font-weight: 400;">per </span></em><em><span style="font-weight: 400;">dozen </span></em><em><span style="font-weight: 400;">egg </span></em><em><span style="font-weight: 400;">a</span></em><span style="font-weight: 400;">s </span><span style="font-weight: 400;">w</span><em><span style="font-weight: 400;">ell </span></em><em><span style="font-weight: 400;">as </span></em><em><span style="font-weight: 400;">cost </span></em><em><span style="font-weight: 400;">per </span></em><em><span style="font-weight: 400;">dozen </span></em><em><span style="font-weight: 400;">e</span></em><span style="font-weight: 400;">gg </span><span style="font-weight: 400;">w</span><em><span style="font-weight: 400;">e</span></em><span style="font-weight: 400;">re </span><em><span style="font-weight: 400;">significantly </span></em><em><span style="font-weight: 400;">reduced </span></em><em><span style="font-weight: 400;">among </span></em><em><span style="font-weight: 400;">hens previously </span></em><em><span style="font-weight: 400;">subjected </span></em><em><span style="font-weight: 400;">to </span></em><em><span style="font-weight: 400;">either </span></em><em><span style="font-weight: 400;">6 </span></em><em><span style="font-weight: 400;">or </span></em><span style="font-weight: 400;">8 </span><span style="font-weight: 400;">w</span><em><span style="font-weight: 400;">eeks </span></em><em><span style="font-weight: 400;">of </span></em><em><span style="font-weight: 400;">SAD </span></em><em><span style="font-weight: 400;">feeding </span></em><em><span style="font-weight: 400;">during </span></em><em><span style="font-weight: 400;">rearing </span></em><em><span style="font-weight: 400;">(</span></em><em><span style="font-weight: 400;">p </span></em><em><span style="font-weight: 400;">< </span></em><em><span style="font-weight: 400;">0</span></em><em><span style="font-weight: 400;">.</span></em><em><span style="font-weight: 400;">0</span></em><em><span style="font-weight: 400;">5)</span></em><em><span style="font-weight: 400;">. </span></em><em><span style="font-weight: 400;">E</span></em><span style="font-weight: 400;">gg </span><span style="font-weight: 400;">w</span><em><span style="font-weight: 400;">eight </span></em><em><span style="font-weight: 400;">as </span></em><em><span style="font-weight: 400;">well </span></em><em><span style="font-weight: 400;">as </span></em><em><span style="font-weight: 400;">egg </span></em><em><span style="font-weight: 400;">diameter </span></em><span style="font-weight: 400;">we</span><em><span style="font-weight: 400;">re similar among </span></em><em><span style="font-weight: 400;">hen</span></em><em><span style="font-weight: 400;">s </span></em><em><span style="font-weight: 400;">in </span></em><em><span style="font-weight: 400;">all </span></em><em><span style="font-weight: 400;">dietary </span></em><em><span style="font-weight: 400;">treatments </span></em><em><span style="font-weight: 400;">(</span></em><em><span style="font-weight: 400;">p </span></em><em><span style="font-weight: 400;">> </span></em><em><span style="font-weight: 400;">0</span></em><em><span style="font-weight: 400;">.</span></em><em><span style="font-weight: 400;">05)</span></em><em><span style="font-weight: 400;">. </span></em><em><span style="font-weight: 400;">S</span></em><em><span style="font-weight: 400;">AD </span></em><em><span style="font-weight: 400;">feeding </span></em><em><span style="font-weight: 400;">programme </span></em><em><span style="font-weight: 400;">did </span></em><em><span style="font-weight: 400;">not </span></em><em><span style="font-weight: 400;">significantly </span></em><em><span style="font-weight: 400;">affect </span></em><em><span style="font-weight: 400;">hens </span></em><em><span style="font-weight: 400;">livability </span></em><em><span style="font-weight: 400;">(</span></em><em><span style="font-weight: 400;">p </span></em><em><span style="font-weight: 400;">> </span></em><em><span style="font-weight: 400;">0</span></em><em><span style="font-weight: 400;">.</span></em><em><span style="font-weight: 400;">05</span></em><em><span style="font-weight: 400;">)</span></em><em><span style="font-weight: 400;">. </span></em><em><span style="font-weight: 400;">It </span></em><em><span style="font-weight: 400;">wa</span></em><em><span style="font-weight: 400;">s </span></em><em><span style="font-weight: 400;">concluded </span></em><em><span style="font-weight: 400;">that</span></em><em><span style="font-weight: 400;">, </span></em><em><span style="font-weight: 400;">subjecting </span></em><em><span style="font-weight: 400;">black </span></em><em><span style="font-weight: 400;">harco </span></em><em><span style="font-weight: 400;">hens </span></em><em><span style="font-weight: 400;">to </span></em><em><span style="font-weight: 400;">SAD </span></em><em><span style="font-weight: 400;">feeding </span></em><em><span style="font-weight: 400;">fo</span></em><em><span style="font-weight: 400;">r </span></em><em><span style="font-weight: 400;">6 </span></em><span style="font-weight: 400;">w</span><em><span style="font-weight: 400;">eeks </span></em><em><span style="font-weight: 400;">during </span></em><em><span style="font-weight: 400;">rearing </span></em><em><span style="font-weight: 400;">period </span></em><em><span style="font-weight: 400;">in </span></em><em><span style="font-weight: 400;">place </span></em><em><span style="font-weight: 400;">of </span></em><em><span style="font-weight: 400;">ad </span></em><em><span style="font-weight: 400;">libitum </span></em><em><span style="font-weight: 400;">feeding</span></em><em><span style="font-weight: 400;">, </span></em><em><span style="font-weight: 400;">c</span></em><em><span style="font-weight: 400;">ou</span></em><em><span style="font-weight: 400;">ld </span></em><em><span style="font-weight: 400;">improve </span></em><em><span style="font-weight: 400;">laying </span></em><em><span style="font-weight: 400;">efficiency</span></em><em><span style="font-weight: 400;">. </span></em></p><p> </p>
ER -