Acta Agrestia Sinica

›› 2005, Vol. 13 ›› Issue (3): 203-208.DOI: 10.11733/j.issn.1007-0435.2005.03.007

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Path Analysis between Forage Nutrilites and Agronomic Traits in Sudangrass

WANG Yun-wen1, CAO Zhi-zhong2, HAN Jian-guo1, CHEN Xiao-jun3, HAO Kai3   

  1. 1. Grassland Science Department, College of Animal Science and Technology, China Agricultural University, Grassland Vegetation Restoration and Reconstruction Key Laboratory of the Ministry of Agriculture, Beiing 100094, China;
    2. College of Grassland Science, Gansu Agricultural University, Lanzhou 730070, China;
    3. Zhangye Institute of Agriculture Research, Zhangye, Gansu Province 734000, China
  • Received:2004-09-09 Revised:2004-12-30 Online:2005-08-15 Published:2005-08-15

苏丹草营养成分与农艺性状通径分析

王赟文1, 曹致中2, 韩建国1, 陈晓军3, 郝铠3   

  1. 1. 中国农业大学草业科学系, 农业部草地植被恢复与重建重点开放实验室, 北京, 100094;
    2. 甘肃农业大学草业学院, 兰州, 730070;
    3. 甘肃省张掖地区农业科学研究所, 张掖, 734000
  • 作者简介:王贇文(1973- ),男,甘肃天祝人,博士,讲师,已发表论文10篇,主要从事牧草育种与种子学研究
  • 基金资助:
    农业部“948”重大项目(202099)部分资助

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Abstract: A study to analyze and determine the differences of nine sudangrass varieties'nutrilites and agronomic traits at earing stage, to do path analysis between nutrilites induding forage crude protein, fat and fiber and 5 agronomis traits such as time-length from emergence to earing, diameter of the main stem base, nodal number per main stem, tiller per plant ,and stem-leaf ratio, indicated that time-length from emergence to heading nodal number per main stem, and tiller number per plant were the most significant complementing and limiting factors influencing the sudangrass varieties'contents of crude protein, fat and fiber. Cultivars that grow vigorously, ear early, with less nodals on the main stem but more tillers per plant are number of nodals per main stem are criteria by which a desired sudangrass is distinguished. Besides, the number of tillers per plant of a variety is also gauged for progeny selection.

Key words: Sudangrass, Varieties, Forage nutrilities, Agronomic traits, Path analysis

摘要： 测定9个苏丹草(Sorghum sudanense)品种抽穗期饲草常规营养成分含量和农艺性状的差异,对品种间差异显著的粗蛋白质、粗纤维和粗脂肪含量以及出苗至抽穗期的日数等5个农艺性状进行通径分析。结果表明:出苗至抽穗期的日数、主茎节数和单株分蘖数对粗蛋白质、粗纤维和粗脂肪含量的直接影响和综合作用最大,并且是主要的限制性因素;出苗后生长快、抽穗早、主茎节数少、单株分蘖多的苏丹草植株、品系或品种和营养价值较高;在苏丹草品质育种中可选用出苗到抽穗期日数和主茎节数作为主要选育指标,并适当考虑单株分蘖数指标进行亲本或后代选择。

关键词: 苏丹草, 品种, 营养成分, 农艺性状, 通径分析

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