Comparison of barley forage with highest, intermediate, and lowest digestible fiber (NDF) with corn forage in high production dairy cattle

高产奶牛中可消化纤维（NDF）最高、中等和最低的大麦饲料与玉米饲料的比较

• 批准号: 484992-2015
• 负责人: Yu, Peiqiang
• 金额: $ 1.64万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=619134
• 关键词: Comparison; barley; forage; highest; intermediate

The present feeding of cereal grains to dairy and beef cattle is faced with increasing challenges in terms of animal production and health. The cost of feed grains is variable and has highly increased in recent times, threatening the economic competitiveness livestock production in western Canada. Alternative of feed resources particularly forages with high nutritive value are required to improve Feed Milk Value (FMV) and improve feeding utilization efficiency for dairy cows. However, how much difference, variation, nutrient availability and molecular structure between and within varieties of forage barley, is unknown. The objectives of this study are to reveal the unique inherent structures of three new barley and one new cool-season corn forage affected by feed processing and determine the sensitivities of intrinsic molecular structure to the processing using the advanced synchrotron radiation-based molecular infrared microspectroscopy and DRIFT /ATR-FTIR molecular spectroscopy and quantify intrinsic structural changes in relation to digestive kinetics and nutritive value in the rumen and intestine in ruminants. The proposed research program includes three projects. In project 1, we will reveal unique structural features of barley and corn forage affected by the processing and study the processing-induced changes on feed quality. In project 2, we will study N-to-energy synchronization of barley and corn forage and determine the processing impact on nutrient availability. In project 3, we will study truly absorbed protein supply of forage affected by the processing to dairy cattle. The hypothesis is that forage has unique intrinsic structure which can be detected by the advanced molecular spectroscopy techniques at a molecular level or Globar-sourced molecular spectroscopy and the feed structure changes induced by the processing will affect forage feed quality and nutrient availability, fermentation and digestion behavior in the rumen and intestines in dairy cattle. The final goals are to increase our basic knowledge of the nutritional relevance of feed intrinsic structure and feed chemistry in new barley and corn. The information obtained from this research program will support sustainable development of feed and livestock industry.

目前用谷物喂养奶牛和肉牛在动物生产和健康方面面临着越来越多的挑战。饲料谷物的成本变化很大，并且近年来大幅上涨，威胁到加拿大西部畜牧业生产的经济竞争力。需要替代饲料资源特别是高营养价值的牧草，以提高奶牛的饲料乳值（FMV），提高饲料利用效率。然而，饲用大麦品种之间和内部的差异、变异、养分利用率和分子结构有多大，目前尚不清楚。本研究的目的是揭示三种新大麦和一种新冷季玉米饲料受饲料加工影响的独特固有结构，并利用先进的同步辐射分子红外显微光谱法确定内在分子结构对加工的敏感性， DRIFT /ATR-FTIR 分子光谱并量化反刍动物瘤胃和肠道中与消化动力学和营养价值相关的内在结构变化。拟议的研究计划包括三个项目。在项目1中，我们将揭示大麦和玉米饲料受加工影响的独特结构特征，并研究加工引起的饲料品质变化。在项目 2 中，我们将研究大麦和玉米饲料的氮-能量同步，并确定加工对养分有效性的影响。在项目3中，我们将研究奶牛加工过程中对饲料的真正吸收蛋白质供应的影响。假设饲料具有独特的内在结构，可以通过先进的分子光谱技术在分子水平上或Globar来源的分子光谱进行检测，并且加工引起的饲料结构变化将影响饲料质量和养分利用率、发酵和消化奶牛瘤胃和肠道的行为。最终目标是增加我们对新大麦和玉米饲料内在结构和饲料化学的营养相关性的基本了解。从该研究计划中获得的信息将支持饲料和畜牧业的可持续发展。