›› 1999, Vol. 7 ›› Issue (1): 22-27.DOI: 10.11733/j.issn.1007-0435.1999.01.004

• 研究论文 • 上一篇    下一篇

象草和壮丽草根系空间分布及养分吸收研究

漆智平1, I. M. Rao2, J. Ricaurte2   

  1. 1. 中国热带农业科学院农牧研究所, 海南, 571737;
    2. 哥伦比亚国际热带农业中心, 卡利, A.A6713
  • 出版日期:1999-02-15 发布日期:1999-02-15
  • 基金资助:
    国家外专局资助

Study on Root Space Distribution in Soil and Nutrient Uptake in Elephant Grass and Imperial Grass

Qi Zhiping1, I. M. Rao2, J. Ricaurte2   

  1. 1. Tropical Field Crops and Animal Husbandry Research Institute, Chinese Academy of Tropical Agriculture Science, Hainan 571737;
    2. International Center for Tropical Agriculture Cali, Colombia A. A. 6713
  • Online:1999-02-15 Published:1999-02-15

摘要: 研究两种禾本科牧草根系空间变异及养分吸收特性。结果表明:象草和壮丽草的根系有85%以上分布在0~40cm的土层中。象草根系生物量比壮丽草高2倍。象草和壮丽草根重与茎叶重的比值分别为2.76和1.24。象草茎叶中矿物质养分的含量高于壮丽草。

关键词: 象草, 壮丽草, 根系空间分布, 养分吸收

Abstract: Elephant grass and Imperial grass were selected to study the properties of root space distribution and nutrient uptake. The results indicated that there were 85% roots to distribute in the layer of 0~40 cm in soil for the two grasses. The root biomass of elephant grass was two-fold greater than that of the imperial grass. The leaf/stem ratio of elephant grass and imperial grass were 2.76 and 1.24,respectively. The mineral nutrient in shoot of elephant grass was higher than that of the imperial grass.

Key words: Elephant grass, Imperial grass, Root space distribution in soil, Nutrient uptake