department of zoology i]ntversity of tiie punjab - Higher Education ...

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7 !o 20 veets ofage had a positive influ.n@ on €89 prDdrction. LowerinS di.ts by 20 or
3096 FnEcd crrcdlctive pqfomocc conp.Ed with Min8 ad Lrtm b6is-
Zgrpr@io .t al. (197) an lyscd thd f@.d noultirs des not h.v. dy b.n ficial
€fre.rs o. rh. prod@rion ofJapdese quail.
Tnc s. ofzinc oxide (zno) for inducdon orooulting w6.valut d on d fam of
10,000 SSL. hybdd hec in Budva Yusoslavi., in Apnl l9r. ZnO wa add.d io rhe diet
at 15 ksl6001$ of dicr !r tbe end of lcchmlogical laying F.iod ai ?3 @ks of lge
(Fililovi. dd Stcvcncvic, 199). Molhing *6 conpleied *irnin 8 to l0 days md n s
ferbeu app.d 28 days rft6 noulting. L.yin8 p.riod w6 extend€d by l0 nonrhs affer
i uctiotr of noulting, st sticn iinc egg prodkdon *6 53%. It is con ludcd thlt ZnO
ar 25000 pptr/I000 kg of fed h6 .o toxic cflsr.
'nE poductiv. Frtolllfu of conm@i.l layinc hG subjdr.d ro ditr@r
mdods of moulting 6 sludid o! % Hy-lift layidg h6 of 85 @t5 of .ge. ft€
lr.atndb EE Tl, conv€nrioml b.rhod offccd qifidaMl dunng $. fiBt 12 dats T2,
hish zinc dicq T3, low ene.gy diet fed in Uhncd daily ponions (45 g/hen/day)i T4,low
.ndgy dict f.d dd /irrr@ (Rmos €r al 1999). The pr.ducrion dara affer th. boutl
Friod *cc !@riLd duine five 28nay pcrio