无芒雀麦抽穗后不同刈割期的产草量和饲草品质研究

The Research of Yield and Quality of Forage Hrass of Bromus After Heading in Different Cutting View

各种牧草，由于生长环境，发育规律及利用方式不同，适宜的刈割时期亦有一定差异。无芒雀麦在甘肃牧区的高寒条件下，抽穗到开花期正值气温较高的季节。此时，无芒雀麦生长迅速，干物质积累最快，产草量及营养物质也最丰富。试验结果表明：抽穗到开花期刈割的无芒雀麦叶量率可保持在28％-31％左右，粗蛋白质含量在12％以上，糖分40％左右，粗纤维只有30％左右。因此，在无芒雀麦的抽穗至开花期，刈割调制干草最好。

A variety of grass, as the growth environment, development and use of the law in different ways, the cutting period has a certain difference. Bromus growth in the pastoral areas of Gansu Province in cold conditions, heading into bloom in the high tempera- ture of the season. At this point, bromus rapid growth, the fastest accumulation of dry matter, yield and nutrients are also the richest. The results showed that： heading to the flowering period of cutting bremus,leaf volume rate can be maintained at 28% to 31% , crude protein content in more than 12%, 40% sugar, crude fiber is only about 30%. As a result, in heading to the flowering period of brumus, modulation cutting hay is the best period.