草业学报2017，Vol.26Issue(9)：57-65,9.DOI:10.11686/cyxb2016487
刈割时间对黄土高原紫花苜蓿产量与营养品质的影响
Effects of cutting time on the yield and nutritive value of alfalfa on the Loess Plateau
摘要
Abstract
Cutting time is one of the key factors affecting the yield and quality of alfalfa.In these experiments,we evaluated the effects of different cutting times in 2009 and 2010 on the yield and quality of alfalfa hay.The hay yield and crude protein yield of alfalfa were highest at the early flowering stage (P＜0.001).Cutting before the early flowering stage resulted in significantly decreased hay yield and crude protein yield (P=0.003).As the interval between the first and second cutting times increased,the contents of neutral detergent fiber,acid detergent fiber,and crude fiber increased (P＜0.001),and the crude protein content decreased (P＜0.001).With the first cutting at early flowering,an interval of 72 days (2009) and 68 days (2010) resulted in the highest yield and crude protein production (2275.2 kg/ha and 180.2 kg/ha,respectively,in 2009;2063.6 kg/ha and 263.1 kg/ha,respectively,in 2010).These results indicate that the appropriate time for the first cutting of alfalfa on the Loess Plateau is at the early flowering stage in mid-June,and that of the second cutting is approximately 70 days later in late August.关键词
生长时间/粗蛋白/粗纤维/茎叶比/相互关系Key words
growth time/crude protein/crude fiber/stem leaf ratio/relationship引用本文复制引用
胡安,康颖,陈先江,侯扶江..刈割时间对黄土高原紫花苜蓿产量与营养品质的影响[J].草业学报,2017,26(9):57-65,9.基金项目
甘肃省2016年草牧业试验试点和草业技术创新联盟科技支撑(GCLM2016001),国家自然科学基金(31672472),农业部公益性行业计划(201403071-6)和教育部创新团队(IRT17R50)资助. （GCLM2016001）
