干物质和粗蛋白质是计算动物日粮的重要参数。由于动物生长和组织恢复需要矿质元素,而矿质元素又是形成奶中大量矿质营养的来源,因此牧草也必须含有丰富的矿质成分。家畜特别是怀孕期和产奶量大的家羊,容易患缺钙和缺磷症(Sen 和 Ray,1971年)。本文报道了石膏处理对五种牧草的干物质、粗蛋白质产量及化学成分影响的 Dry Matter and Crude Protein are important parameters for calculating animal diets. Since animal growth and tissue recovery require mineral elements, which in turn form a source of substantial mineral nutrition in milk, the forage must also be rich in mineral ingredients. Livestock, especially pregnant sheep, who have high amounts of milk during pregnancy and are prone to calcium deficiency and phosphorus deficiency (Sen and Ray, 1971). This paper reports the effects of gypsum treatment on the dry matter, crude protein yield and chemical composition of five pastures