草地学报

›› 2005, Vol. 13 ›› Issue (4): 313-319.DOI: 10.11733/j.issn.1007-0435.2005.04.012

• 研究报告 • 上一篇    下一篇

氮磷对马蹄金抗旱性的影响

呼天明, 胡晓艳, 李红星   

  1. 西北农林科技大学动物科技学院, 陕西杨凌, 712100
  • 收稿日期:2004-11-30 修回日期:2005-04-21 出版日期:2005-11-15 发布日期:2005-11-15
  • 作者简介:呼天明(1958- ),男,内蒙古人,教授,博士生导师,主要从事牧草和草坪草相关的教学及研究
  • 基金资助:
    国家杨凌示范区科技专项(99KG06)

Nitrogen and Phosphorus Effect on Drought-Resistance of Dichondra Repens in Different Growing Stages

HU Tian-ming, HU Xiao-yan, LI Hong-xing   

  1. Northwest Sci-Tec University of Agriculture and Forestry, Yangling, Shannxi Province, 712100, China
  • Received:2004-11-30 Revised:2005-04-21 Online:2005-11-15 Published:2005-11-15

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摘要： 研究氮磷对马蹄金(Dichondra repens)出苗期、成坪期、旺盛期和衰退期抗旱生理指标的影响。结果表明:施磷后马蹄金根系活力上升,超氧化物歧化酶活性提高,增强了避旱能力,其中高磷(1.50kg P2O5/100m2)的效果最好;低氮(0.24kg N/100m2、0.57kg N/100m2)使叶片脯氨酸、可溶性糖和叶绿素含量增加,通过渗透调节提高其耐旱性,但高氮则使叶片超氧化物歧化酶活性降低,丙二醛大量累积,加重了水分胁迫程度;马蹄金受水肥影响最主要的抗旱生理指标为:叶片脯氨酸含量、根系活力和叶绿素含量。

关键词: 马蹄金, 抗旱性, 氮磷

Abstract: Dichondra repens had been chosen as the material for studying nitrogen and phosphorus effect on the plant’s drought-resistance indexes in water stress during the emerging,turf forming,vigorously growing,and declining stages.The results of the experiment are as follows: Applying the fertilizer P raised D.repens'root vitality and superoxide dismutase activity,consequently,strengthened its drought-avoidance.Plentiful P（1.50 kgP2O5/100 m2） was optimum.Low and medium amount of N（0.24kg N/100 m2、0.57kg N/100 m2） increased the contents of proline,soluble sugar,and chlorophyll,which strengthened D.repens'drought-tolerance through osmotic adjustment.Excessive amount of N led to the decline of superoxide dismutase activity and the accumulation of malondialdehyde,which aggravated water stress.D.repens'proline content,root vitality,and chlorophyll content gave the most sensitive indexes to the influence of water and fertilizers that resist drought.

Key words: Dichondra repens, Drought-resistance, Nitrogen and phosphorus

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