THE EFFECT OF PHOTOPERIOD, LIGHT INTENSITY AND WATTAGE POWER ON PERFORMANCE OF DANDARAWI CHICKEN
El-Sheikh, T.M., A.M. El-Gammal, M.N. Makled
Abstract
A total number of 840 birds were used to study the effect of photoperiod, light intensity and wattage power on performance and blood constituents of Dandarawi fowl. The birds were classified into seven groups, 2 for the light intensity, 2 for photoperiod, 2 for wattage power and 1 was used as a control. The traits studied were sexual maturity, egg production and blood constituents. Light intensity of 80 luxes during growing period reduced body weight at sexual maturity than that obtained by using 20 and 5 luxes, respectively. The same trend was observed with first egg weight. The high intensity during rearing period delayed the sexual maturity, since group held at 20 luxes had the youngest age, while the group held at 80 luxes had the oldest age. The age at sexual maturity decreased as the photoperiod during growing period increased. The egg weight at sexual maturity increased as the photoperiod decreased. Body weight and age at sexual maturity decreased as the wattage power increased. The hen housed production and survivor egg laying rate decreased as light intensity increased. The performance was better under low light intensity of 15 luxes. The groups which illuminated to 16 hours produced egg production more than that illuminated to 18 and 20 hours. Hen housed production and survivor egg production for the groups exposed to 18 and 20 hours was less than that of the control. The hen housed production and survivor production were decreased as wattage power increase.
Key words: Dandarawi fowl, photoperiod, light intensity and wattage power, egg production
EFECTUL FOTOPERIOADEI, INTENSITĂŢII ŞI PUTERII ILUMINATULUI ASUPRA PERFORMANŢEI PUILOR DANDARAWI
El-Sheikh, T.M., A.M. El-Gammal, M.N. Makled
Rezumat
Un efectiv total de 840 pasari a fost utilizat pentru a studia efectul fotoperioadei, intensitatii luminoase si a puterii iluminatului asupra performantei productive si constituentilor sanguini la pasarile Dandarawi. Materialul biologic a fost împartit în 7 loturi, din care 2 pentru intensitatea luminoasa, 2 pentru fotoperioada 2 pentru puterea luminii si 1 grup de control. Parametrii studiati au fost: maturitatea sexuala, productia de oua si constituentii sanguini. Intensitatea luminoasa de 80 lucsi asigurata în perioada de crestere a puicutelor a produs reducerea greutatii corporale la care maturitatea sexuala a fost atinsa, comparativ cu variantele de intensitate de 20, respectiv 5 lucsi. Rezultate asemanatoare s-au obtinut si pentru greutatea primului ou depus. Intensitatea luminoasa puternica pe durata perioadei de crestere a întârziat maturizarea sexuala, grupul expus la 20 lucsi ajungând precoce în momentul maturitatii sexuale, în timp ce lotul expus la 80 lucsi a atins cel mai tardiv acest moment. Greutatea oualor la atingerea maturitatii sexuale a fost mai mare pe masura ce fotoperioada a fost mai scurta. Greutatea corporala si momentul atingerii maturitatii au descrescut, atunci cânt puterea luminii a fost mai mare. Productia numerica de oua si intensitatea de ouat au descrescut, sub influenta intensificarii intensitatii luminoase. Productivitatea a fost mai buna la intensitate luminoasa scazuta, de 15 lucsi. Loturile care au fost expuse luminii timp de 16 ore/zi au avut o productie superioara celor expuse luminii 18-20 ore zilnic. Productia numerica de oua si viabilitatea loturilor expuse zilnic la 18-20 ore lumina au fost mai reduse decât în cazul lotului de control. Productia de oua pe gaina furajata si rata de supravietuire au descrescut, pe masura ce puterea luminoasa (în wati) a crescut.
Cuvinte cheie: pasari Dandarawi, fotoperioada, intensitate luminoasa si putere de iluminar, productie de oua
