中文摘要：

为探讨多花黑麦草适宜的氮肥施用量,本研究在大田试验条件下,通过设置5个不同氮肥施用量,测定了不同施氮水平多花黑麦草的生产指标和营养品质,并分析了不同施氮水平的经济效益,结果表明,多花黑麦草的生产性能和营养品质均随施氮量的增加而增加,但当施氮量增加至150kg/hm2之后,随着施氮量的固定增加,虽然多花黑麦草的产草量和营养品质会继续小幅增加,但是产出增长的增长率不会再增加,说明研究区域多花黑麦草适宜的施氮量为150kg/hm2.

英文摘要：

Effects of nitrogen fertilizing on productivity and nutritional quality of Lolium multiflorum cv.Tegragold were evaluated through a field trail. In addition, correlations between the productivity and nitrogen fertilizing, the nutritional quality and nitrogen fertilizing were also studied. The results showed that increasing nitrogen fertilizer application significantly improved the productivity and nutritional quality of Lolium multiflorum cv.Tegragold. With nitrogenous fertilizer quantity improve from 0 to 200kg/hm2, the productivity and nutritional quality of Lolium multiflorum cv. Tegragoldwere also improved. According to the marketing price of nitrogen fertilizer and Lolium multiflorum anysis that the biggest economic benefit was achieved when nitrogenous fertilizer quantity were at 150kg/hm2.