EQN 4020 Lecture Notes - Lecture 16: Calcium Oxide, Fluid Compartments, Extracellular Fluid
13 Apr 2018
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Objectives: to gain an understanding of how minerals are absorbed and metabolized to further understand how minerals can affect nutrition. Selenium (se: manganese (mn, fluorine (fl, chromium (cr, nickel, molybdenum, arsenic, silicon, boron. Digestibility & absorption: chemical form of minerals in feed is variable, bound to inorganic or organic molecules, e. g. Phytate (po4: supplemental form has high digestibility and absorption. Inorganic vs. organic: numerous inter-relationships, absorptive efficiency tends to decrease as intake increases, like other nutrient density, minerals tend to be lower in more mature forages vs. younger or pastures, anti-nutritional factors also can affect mineral bioavailability. Declining soil fertility has increased the importance of mineral fortification of horse diets as the mineral content of pasture, hay and grain is in decline. Plants do not require selenium or iodine for growth and may be deficient for the needs of horses.
