RICE SCIENCE

• 研究报告 • 上一篇    下一篇

Effect of Nitrogen on Water Content, Sap Flow, and Tolerance of Rice Plants to Brown Planthopper, Nilaparvata lugens

LU Zhong-xian1, S. VILLAREAL2, YU Xiao-ping1, K. L. HEONG2 , HU Cui3
  

  1. 1Plant Protection Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; 2International Rice Research Institute, DAPO Box 777, Metro Manila, Philippines; 3Institute of Applied Entomology, Zhejiang University, Hangzhou 310029, China
  • 收稿日期:2003-02-10 修回日期:1900-01-01 出版日期:2004-03-30 发布日期:2004-03-30

摘要:

Water content (WC) and sap flow from leaf sheath of rice plants with varying nitrogen levels at different growth stages, and fluctuations in relative water content (RWC) of rice plants being damaged by brown planthopper (BPH), Nilaparvata lugens were determined in the laboratory, and the tolerance of rice plants to BPH at different nitrogen regimes was evaluated in the greenhouse at International Rice Research Institute (IRRI), the Philippines. The results indicated that both WC and RWC were increased significantly, as the amount of sap flow from rice plants was reduced statistically, with the increase of nitrogen content in rice plants. RWC in rice plants applied with high nitrogen fertilizer decreased drastically by the injury of BPH nymphs, while the reduced survival duration of rice plants with the increase of nitrogen content was recorded. These may be considered to be one of the important factors in increasing the susceptibility to BPH damage on rice plants applied with nitrogen fertilizer.

关键词: brown planthopper, nitrogen, relative water content, sap flow, tolerance