Performance of growing–fattening lambs fed whole cotton seed

Abstract

: E †ects of diets containing increasing levels of whole cotton seed (WCS) on feed intake, liveweight gain, feed conversion, feeding margin and carcass characteristics were studied. Diets contained 0, 5, 10, 15, 20 and 30% WCS and were fed ad libitum to growing lambs for 54 days. All diets were approximately isonitrogenous (163È186 g crude protein kg~1 dry matter) and isocaloric (19È20 MJ gross energy kg~1 of dry matter). During the Ðrst 28 days, four groups of 10 Karagouniko male lambs with initial liveweights of approximately 17É6 kg were fed diets containing 0, 5, 10 and 15% WCS and then, for the next 26 days, diets containing 0, 10, 20 and 30% WCS, respectively. Lambs fed the 15È30% WCS diet ingested about 20 mg kg liveweight~1 day~1 of free gossypol. At 54 days and liveweights of approximately 34É7 kg, Ðve lambs from each treatment were slaughtered and carcass data were collected. There were signiÐcant di †erences in feed intake, liveweight gain, cooler shrink, rumen contents, intestinal fat and liver weight among the lambs fed these diets. Cooler shrink and intestinal fat, and perirenal fat and the combined weight of intestinal and perirenal fat, were signiÐ-cantly (P \ 0É05) correlated. Pelleting of the WCS diets reduced the concentration of free gossypol in these diets. It was concluded that WCS was satisfactory as a feed ingredient for growing sheep and can be incorporated into ruminant diets as a source of energy and protein. No indication of gossypol toxicity was detected.1998 Society of Chemical Industry ( J Sci Food Agric 78, 281È289 (1998)

Feeding of whole cottonseed on performance, carcass characteristics and intestinal morphology of Zandi lambs

“…This is consistent with the results obtained by Kandylis et al (1998). Diets and nutrient contents may also affect carcass characteristics and meat quality.…”

“…Increasing demands for energy and protein sources by ruminants have increased the importance of WCS as an energy and protein supplying ingredient. Due to the high energy, oil and protein contents, WCS is a popular feedstuff for ruminants and it has been accepted as an alternative to cereal grain in many rations (Kandylis et al, 1998).…”

“…Diets and nutrient contents may also affect carcass characteristics and meat quality. Kandylis et al (1998) indicated that growing lambs fed WCS had a higher live weight, increased hot carcass weight and dressing percentage in comparison with a control diet. The low dressing percentage (slaughter-weight basis) in the control group could be due to a high gut fill which would reduce the dressing percentage.…”

“…In all treatments where WCS was included in the diets the FCR was lower than in the control diet. Similarly, Kandylis et al (1998) found a reduction in FCR when animals were fed WCS at ration levels of 10, 20 and 30%. Kuhlmann et al (1991) reported that live weight gains increased and FCR decreased in heifers receiving 10 -30% WCS in their diets.…”

Desempenho e características da carcaça de cordeiros confinados alimentados com grãos de soja

“…Da mesma forma, Kandylis et al (1998) avaliaram teores crescentes (5, 10, 15, 20 e 30%) de caroço de algodão na ração de cordeiros Karagouniko abatidos aos 30 kg de PV e 102 dias de idade, e não observaram diferença entre os tratamentos sobre RCQ e RCF, os quais apresentaram médias de 48,2 e 46,7%, respectivamente. Gibb et al (2005) utilizaram teores crescentes (0, 2,5 e 5%) de grãos de cânhamo como fonte de gordura na ração de novilhos, e não observaram diferença na QR, AOL e EG.…”