本文测定了干草含水量,无水氨含量和氨的曝露时间对干草营养物质和保存特性的影响。在1、3和6周的时间内用0、2和4%(占干物质)的氨处理干燥和高水分海岸狗牙根干草得到以下结果。氨化处理提高了干燥和高水分干草的 pH 值(P<0.01)及高水分干草的乳酸含量(P<0.05)。用2和4%的氨处理干燥干草,其粗蛋白质含量分别提高13和19%;而处理高水分干草则提高17和25%。在氨曝露3周后处理干燥和高水分干草,其粗蛋白质含量和体外干物质消化率均最高。随着氨含量的提高,高水分干 In this paper, the effects of hay moisture content, anhydrous ammonia content and ammonia exposure time on the nutrients and preservation characteristics of hay were studied. Drying and high-moisture Coast bermudagrass treated with ammonia at 0, 2 and 4% (dry matter) within 1, 3 and 6 weeks resulted in the following results. Ammonification increased the pH of dry and high-moisture hay (P <0.01) and lactic acid content of high moisture hay (P <0.05). Dried hay was treated with 2 and 4% ammonia, with 13 and 19% increase in crude protein content, respectively, and 17 and 25% increase in hay treatment with high moisture. Three weeks after ammonia exposure, dry and high-moisture hay had the highest crude protein content and dry matter digestibility in vitro. With the increase of ammonia content, high moisture dry