草地学报

›› 2011, Vol. 19 ›› Issue (5): 813-820.DOI: 10.11733/j.issn.1007-0435.2011.05.017

• 研究论文 • 上一篇    下一篇

高丹草营养生长与饲用品质变化规律分析

李源, 谢楠, 赵海明, 刘贵波, 谢俊雪   

  1. 河北省农林科学院旱作农业研究所河北省农作物抗旱研究重点实验室, 河北衡水053000
  • 收稿日期:2011-03-14 修回日期:2011-06-20 出版日期:2011-10-15 发布日期:2012-07-12
  • 通讯作者: 刘贵波,E-mail:lgb2884@yahoo.com.cn
  • 作者简介:李源(1981- ),男,山西翼城人,硕士,助理研究员,主要从事牧草育种及栽培技术研究,E-mail:gsly868@163.com
  • 基金资助:
    河北省农林科学院青年基金项目(A09040107);国家科技支撑计划(2008BADB3B05);河北省农业科技成果转化项目(10820117D)资助

Analysis on Change Pattern of the Vegetative Growth and Forage Quality of Sorghum bicolor×S.sudanense

LI Yuan, XIE Nan, ZHAO Hai-ming, LIU Gui-bo, XIE Jun-xue   

  1. Dryland Farming Institute, Hebei Academy of Agricultural and Forestry Sciences, Key Laboratory for Crop Drought Resistance of Hebei Province, Hengshui 053000, China
  • Received:2011-03-14 Revised:2011-06-20 Online:2011-10-15 Published:2012-07-12

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摘要： 为揭示高丹草(Sorghum bicolor×S.sudanense)在营养生长及饲用品质方面的变化规律,采用大田小区栽培法,以冀草1号、冀草2号高丹草为材料,测定并分析了不同生育天数内其株高、干物质积累量、氢氰酸含量、鲜干比、可溶性糖含量、茎叶比以及粗蛋白含量等性状指标。结果表明:高丹草的株高、干物质积累量以及粗蛋白产量的变化随生育天数的推进符合Logistic增长模型,均在抽穗期达到最大值;其氢氰酸含量、鲜干比及粗蛋白含量呈下降趋势,茎叶比呈增加趋势,符合一元线性回归模型;而可溶性糖含量变化符合二次曲线回归模型。回归分析得出,高丹草在抽穗期收割可同时获得较高的物质产量和营养价值。

关键词: 高丹草, 营养生长, 饲用品质, 回归分析

Abstract: The change pattern of the vegetative growth and forage quality of Sorghum bicolor×S.sudanense was analyzed.Plant height,dry matter accumulation,HCN content,fresh/dry ratio,sugar content and crude protein were investigated and analyzed during different growth stages.Results showed that the change of plant height,dry matter accumulation and crude protein yield of Sorghum bicolor×S.sudanense was related to a logistic growth model under different growth stages,and the max value was in heading stage.With an extended growth period,the HCN content,crude protein content and the ratio of fresh/dry had a decreasing trend while the ratio of stem/leaf showed an increase;their regularity of changes fit the linear regression mode.The sugar content of Sorghum bicolor×S.sudanense complied to a quadratic curve regression mode with different growth days,presenting an initial drop followed by its rising trend.Data suggests that Sorghum bicolor×S.sudanens.should be harvested at its heading stage to produce better biomass and nutritive value.

Key words: Sorghum bicolor×S.sudanense, Nutritive growth, Forage quality, Regression

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