饲用苎麻‘中饲苎1号’最佳刈割株高的研究

摘要

To determine the influences of cutting height on forage ramie(Boehmeria nivea)production,we researched the growth performance,yield and forage quality of different height treatments of the forage ramie'Zhongsizhu No.1'.The results showed that the growth rate at vigorous growing stage of'Zhongsizhu No.1'was higher than that at seedling stage with a trend of first increase and then decrease before September;the yield of dry matter and crude protein increased with the increase of the cutting height;forage quality and leaf-stem ratio decreased with the increase of cutting height.Synthesized the evaluation of growth performance,yield and forage quality,the optimum cutting heights of'Zhongsizhu No.1'at different growing periods in Changsha were as follows:125～135 cm from Mar.6 to Apr.20,75～85 cm from Apr.21 to Jul.11,85～95 cm from Jul.12 to Aug.27,105～115 cm from Aug.28 to Oct.3,respectively.%为探讨刈割株高对饲用苎麻(Boehmeria nivea)产量的影响,对饲料专用苎麻品种—‘中饲苎1号’进行了不同高度处理下的生长性能、产量和饲用品质变化研究,主要研究结果如下:9月份之前,‘中饲苎1号’旺长期的生长速率高于苗期,且呈现先增加后降低的趋势;风干物年产量和粗蛋白年产量随着刈割株高的增加而增加;饲用品质和叶茎比随着刈割株高增加而下降.综合试验期间的生长性能、产量和饲用品质,‘中饲苎1号’在湖南长沙地区一年内不同时间段的最佳刈割株高为:3月6日-4月20日阶段建议为125～135 cm;4月21日-7月11日阶段建议为75～85cm;7月12日-8月27日阶段建议为85～95 cm;8月28日 10月3日阶段建议为105～115 cm.