草业学报Issue(6)：125-132,8.DOI:10.11686/cyxb2014286
不同生育期和凋萎时间对多花黑麦草饲用和发酵品质的影响
Effects of crop growth stage and wilting time on the feeding and fermentation quality of Italian ryegrass (Lolium multiflorum)silage
摘要
Abstract
The objective of this study was to investigate the feeding and fermentation quality of Italian ryegrass (Lolium multiflorum )cut at different growth stages and wilted for various lengths of time,so as to formulate scientifically based guidelines for optimal wilting time when making silage.One Italian ryegrass variety,Mu-sashi,was used in this study,and there were six wilting treatments (0,1,2,3,4,5 h)at booting and flower-ing stages,with the feeding quality and fermentation quality analyzed.The nonstructural carbohydrate (NSC) content decreased with time during wilting,but water soluble carbohydrate (WSC)which was the main compo-nent of NSC,showed an intital increase in WSC during the first hour of wilting to a high of 10.62% after 1 h, then declined,when cut at booting stage.When cut at flowering stage the WSC content during the wilting peri-od increased to a high of 14.46% after 3 h and then decreased.Fermentation-related data for cutting at booting stage were:pH reached its lowest point,4.05,after 3 h and then increased;the NH 3-N content decreased with increased wilting time;the lactic acid (LA)content initially increased and then decreased,with a high point of 8.49% after 3 h.Corresponding values for cutting at flowering stage were:the pH value increased with wilting time;NH 3-N content initially increased to a high of 2.03 mg/g after 2 h wilting;the LA content decreased slowly at first to 4.56% after 3 h wilting,and then sharply decreased to 1.38% after 5 h wilting.Considering that the ideal for silage making is higher WSC and LA content and lower pH and NH 3-N content,based on these data the optimal wilting time for Italian ryegrass at booting stage would be 3 h,while at flowering stage it would be 2 h.关键词
多花黑麦草/孕穗期/开花期/凋萎/青贮Key words
Italian ryegrass/booting stage/blooming stage/wilting/silage引用本文复制引用
董臣飞,丁成龙,许能祥,张文洁,程云辉,顾洪如..不同生育期和凋萎时间对多花黑麦草饲用和发酵品质的影响[J].草业学报,2015,(6):125-132,8.基金项目
公益性行业科研专项（201303061），国家科技支撑计划项目（2011BAD17B02-04）和国家牧草产业技术体系项目（CARS-35-31）资助。 （）
