Performance of Laying Hens Fed Diets Containing Gums Derived From Tower Rapeseed

Abstract

laying hens fed diets containing gums derived from Tower rapeseed. Can. J. Anim. Sci.57: 479-483. An experiment was conducted to investigate whether rapeseed gums have any detrimental effect on the performance of laying hens. White leghorn pullets of a commercial strain were fed all-mash diets in which the major source of protein was provided by either soybean meal, rapeseed meal, rapeseed meal * 1.57o fapeseed gums, soybean meal -t 1.5Vo rapeseed gums or soybean meal + 1.57, soybean gums. Each diet was offered to four replicate groups of l2 birds during ten 28-day experimental periods. Dietary treatment had no significant (P < 0.05) effect on feed intake or egg production. Birds fed diets containing rapeseed meal produced significantly (P < 0.01) smaller eggs than those birds receiving soybean meal with no added rapeseed gums. Eggshell quality as measured by shell deformation was significantly (P < 0.01) improved when birds were fed rapeseed meal * rapeseed gums or soybean meal * soybean gums, compared to those birds fed either rapeseed meal, or soybean meal with added rapeseed gums. Rapeseed gums had no significant (P < 0.05) effect on body weight or the incidence of liver hematoma. It is concluded that no deleterious effects accrue from feeding laying birds diets containing rapeseed meal to which has been added 1.57c gums, and that the addition of such gums provides rapeseed processors with a useful pollution-free method for their disposal.Les auteurs examinent l'effet des gommes de colza sur la production de poules pondeuses. IJne souche commerciale de poulettes White Leghorn a 6,t4, expos6e e plusieurs 169imes "tous pit6s", dans lesquels les prot6ines 6taient fournies essentiellement par le tourteau de soja, le tourteau de colza, le tourteau de colza plus l. 5 For personal use only.

Use of soybean gum as an emulsifier in diets for commercial laying hens

“…However, when egg size was taken into account (kilogram of feed per kilogram of eggs), this difference disappeared, i.e., hens fed diets containing soybean gum consumed more feed but maintained a production rate similar to that of the control hens. These results are contrary to those of Leeson et al (1977), who reported that the addition of the gum had no effect on feed intake or egg production.…”

“…In a study carried out by Hulan & Proudfoot (1981), hens fed diets containing soybean gum consumed more feed but maintained a production rate similar to that of the control hens; however, the addition of this by-product had no effect on the specific gravity and interior quality of eggs. Leeson et al (1977) reported that the inclusion of the gum had no effect on feed intake or egg production.…”

“…In poultry feed, its energy value and emulsifying characteristics have been explored (Attia et al, 2009;Borsatti et al, 2018); however, there is not enough information available to recommend its use in broiler chicken feed (Viñado et al, 2019). In the case of laying hens, the information is even more restricted, both regarding the incorporation of gum (Leeson et al, 1977;Hulan & Proudfoot, 1981) or raw lecithin in the feed (Mandalawi, 2015), mainly related to the quality of stored eggs. This is important since, as all products of animal origin, eggs are also perishable and begin to lose their internal quality after posture due to their high content of unsaturated fatty acids (Moura et al, 2008).…”

ETLİK ctvctv RASYONLARINA DEGtŞtK DÜZEYLERDE KATIl.AN KOLZA TOHUMU KÜSPESt tLE HAM VE RAFİNE KOLZA YAGININ CANLı AGıRLIK ARTIŞI, YEM TÜKETİMİ ÜZERİNE ETKİsİ.

“…Bu rafinerizasyon artığı glikolipitler, fosfolipitler ile değişik miktarda trigliserit, sterol ve yağ asitlerinden oluşmaktadır. RafinerİL:asyon artığının rasyonlaı a % 6'ya kadar ilave edilmesinin etlik piliçlerde ve yumurta tavuklarında hiçbir zararlı etki yapmadığı bildirilmektedir (7,10).…”