PSSC 330 Lecture Notes - Lecture 8: Basal Metabolic Rate, Rangeland, Livestock Grazing Comparison

• School: Chico State University
• Department: Plant and Soil Science
• Course: PSSC 330
• Professor: De Atley

Document Summary

Carbohydrates= basic source of energy for range animals. Types of carbs: cell contents (starches and sugars) Inside the cell: cell wall contents (cellulose and hemicellulose, starches and sugars. Fat deposits are main source of stored energy in grazing animals. Found in plant components (mostly green plants): Seeds: high in fat (before falling into ground) Grazing and browsing animals are inefficient fat digesters (high requirement of bile needed for digestion in small intestine) Leaves (grasses, forbs, shrubs) much more protein than stems. Forb and shrub leaves generally higher in protein than grasses. Forbs= flowering plants; lose nutrients with water loss] Macrominerals: calcium, phosphorus, sodium, potassium, magnesium, chlorine, sulfure. Large amounts required by animal body (usually less than or equal to 5%) Phosphorus= most limiting to grazing animal productivity. Calcium deficiency= only in leached soils (lots of rain) Microminerals- iron, iodine, copper, cobalt, fluorine, zinc, molybdenum, selenium, manganese. Decreases levels in hay content (white muscle disease in calves and lambs)