中文摘要：

为了解我国目前选育高丹草品种生物学产量水平,采用3次重复的随机区组试验设计,对参加全国饲草高粱区域试验的4个高丹草新品种以及皖草2号(对照)的主要生物学性状和草产量进行了分析比较。结果表明,各品种株高在第1次刈割时无显著差异,在第2次和第3次差异极显著。倒2叶长以皖草2号最长,且显著超过冀草1号和晋草08-1。分蘖数以皖草2号最多。茎粗和倒2叶宽在各品种间无显著差异。皖草2号含糖量最高,且紫斑病危害轻,叶中脉灰色,富含汁液,表明其抗性和适口性相对较好。在5个参试品种中,BMR1的草产量极显著低于其它4个品种,且这4个品种的总产草量差异不显著。通过聚类分析发现,BMR1被单独聚在1类,其余4个品种被聚在另1类。因此,皖草2号仍不失为本地推广种植的优良品种之一。

英文摘要：

To explore the difference of biomass yield among five sorghum-sudangrass hybrids(Wancao No 2 for control),main biological characteristics and fresh forage yield were investigated and analyzed by a randomized block design in triplicate.The results showed that there were not significantly difference in plant height at first mowing among 5 varieties,and high significant difference at second and third mowing.Top 2nd leaf length of Wancao No 2 was the longest,with difference significantly from Jicao No 1 and Jin...