饲用苎麻‘中饲苎1号’最佳刈割株高的研究

Study of Cutting Height of the Fodder Ramie Variety 'Zhongsizhu No.1'

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125~135cm;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85~95cm;8月28日—10月3日阶段建议为105~115cm。

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.