Nutritive evaluation of cold-pressed meals for broiler chickens

对大多数家禽来说，饲料成本占生产成本的60-70%。家禽业需要准备好利用新的和现有作物的饲料成分，以便能够有效地管理饲料成本。为此，必须提供这些饲料原料的可用营养成分，使其能够融入日粮。从用于生物柴油工业的油籽中开发的副产品补充剂有可能用作家禽的替代蛋白质和能量来源，为该工业提供替代饲料。基于生物燃料油的经济价值，对油籽进行冷压以生产含有较高残油的食品可能是目前榨油程序的经济有效替代方案。目前油菜籽和其他油籽作物（如大豆、亚麻荠和油菜籽）产量的增加，可能为家禽饲料提供多种有益的饲料成分。拟议中的研究将评估油菜籽加工生产的食品，如油菜籽、大豆、亚麻荠和油菜籽。将确定由菜籽油、大豆、亚麻荠和油菜籽制成的冷榨食品的营养成分。还将研究通过热处理和添加膳食酶来提高这些产品利用率的策略。开发肉鸡数据库将有助于提高饲粮配方的效率。试验成分的测定值将用于配制发酵剂、生长剂和育成剂肉鸡饲粮，以评估冷榨饲料对生长性能的影响。确定的营养成分值不仅适用于加拿大家禽日粮中通常使用的成分，也适用于加拿大正在开发的成分，这将进一步提高肉鸡饲料配方的效率和家禽的生长性能，并可能增加生产商的回报。加拿大家禽业将受益于获得具有成本效益的替代饲料成分的营养数据库，这将有助于配制成本较低的日粮，并有可能提高饲料转化率。

The cost of feed represents 60-70% of the cost of production for most classes of poultry. The poultry industry needs to be poised to take advantage of feed ingredients from new and existing crops to be able to efficiently manage feed costs. To do so, usable nutrient composition of these feed ingredients must be available to enable their incorporation into diets. By-product supplements developed from oilseeds used for the biodiesel industry have potential to be used as alternative protein and energy sources for poultry giving the industry feeding alternatives. Based on the economic value of the oils for biofuels, cold-pressing of the oilseeds to produce meals that contain higher residual oil may provide cost-effective alternatives to current oil extraction procedures. Current increases in production of canola and other oilseed crops such as soybeans, camelina, and carinata, potentially provide a variety of feed ingredients in quantities beneficial for use in poultry feeds. The proposed study will evaluate meals produced from the processing of oilseeds such as canola, soybeans, camelina and carinata. Nutrient profiles will be determined for cold-pressed meals made from canola, soybean, camelina and carinata oilseeds. Strategies to enhance utilization of these products through heat treatment and dietary enzyme addition will also be investigated. The development of a database for broiler chickens will allow for more efficient diet formulation. Values determined for the test ingredients will be used to formulate starter, grower, and finisher broiler chicken diets to evaluate the effects of the cold-pressed meals on growth performance. Nutrient composition values determined not only for ingredients typically used in Canadian poultry diets but also ingredients being developed in Canada would further improve the efficiency of feed formulation for broilers and subsequent growth performance of the birds and potentially increase returns for the producer. The Canadian poultry industry will benefit by having access to a nutrient database for cost-effective alternative feed ingredients which will facilitate the formulation of lower cost diets and potentially result in improved feed conversion.