Nutritive evaluation of cold-pressed meals for broiler chickens

饲料成本占大多数类别家禽生产成本的60%-70%。家禽业需要做好准备，利用来自新作物和现有作物的饲料成分，才能有效地管理饲料成本。要做到这一点，必须提供这些饲料成分的可用营养成分，以使它们能够并入日粮。从用于生物柴油行业的油籽开发的副产品补充剂有可能被用作家禽的替代蛋白质和能源，为该行业提供饲料替代品。根据生物燃料用油的经济价值，对油籽进行冷压以生产含有较高残留油的膳食，可能会为目前的提油程序提供具有成本效益的替代方案。目前油菜籽和其他油料作物，如大豆、山茶花和龙须草产量的增加，可能会提供大量有益于家禽饲料的各种饲料成分。这项拟议的研究将评估油菜籽加工过程中产生的膳食，如油菜籽、大豆、茶树和龙骨菜。将确定由油菜籽、大豆、山茶籽和龙须菜油籽制成的冷压膳食的营养成分。还将研究通过热处理和添加日粮酶来提高这些产品利用率的策略。肉鸡数据库的开发将有助于更有效的饮食配方。为试验成分确定的值将被用于配制初级鸡、养殖鸡和肥育鸡日粮，以评估冷压肉鸡对生长性能的影响。不仅为加拿大家禽饲料中通常使用的配料确定营养成分值，而且还为加拿大正在开发的配料确定营养成分值，这将进一步提高肉鸡饲料配方的效率和随后的禽类生长性能，并可能增加生产者的回报。加拿大家禽业将受益于获得具有成本效益的替代饲料配料的营养数据库，这将促进低成本饲料的配方，并可能导致提高饲料转化率。

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.