Dr. Tim A McAllister

IntroductionChanging climatic conditions in Western Canada has led to increased amounts of wheat grain failing milling grade standards and as a result more is available as feed (He et al., 2015). One reason for wheat grain failing grading standards is infection with Fusarium graminearum and/or Claviceps purpurea, which produce deoxynivalenol (DON; Bianchini et al., 2015) and ergot alkaloids (EA; T ...

IntroductionThe world population is expected to increase by ~2 billion, reaching 9.7 billion in 2050 (UN, 2019). Compared to 2012, this growth of the global population and affluence of emerging economies is predicted to promote a 40 to 55% increase in global demand for meat and dairy products by 2050 (FAO, 2018). Land resources available to expand production is limited, and there is increasing soc ...

Global drivers impacting food production and consumptionThe agricultural sector is faced with the daunting challenge of producing food for a growing global population, which is expected to reach 8.5 billion by 2030, 9.7 billion by 2050 and 11.2 billion by 2100 (UN WPP 2019), with sub-Saharan African countries accounting for more than half of the growth of the world’s populatio ...

ABSTRACT The objective of this study was to evaluate the effects of a low-Ca diet, followed by a high-Ca diet in combination with feeding of anionic salts and/or vitamin D3 on Ca and acid-base homeostasis of finishing steers. Twenty Hereford steers (448 _ 26 kg) were individually penned and fed at 0800 and 1600 with a ration consisting of 90% barley grain-based concentrate and 10% barl ...

ABSTRACT The objective of this study was to evaluate the effect of supplementing high levels of vitamin D3 to steers fed barley-grain-based finishing diets on Ca metabolism. Fifteen Hereford steers (607 ± 12 kg) were individually penned and fed at 0800 and 1600 with a ration consisting of 90% barley-grain-based concentrate and 10% barley silage [dry matter (DM) basis]. Steers we ...