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Ecological effects and economic benefits of rice-duck farming

DENG Qiang-hui; PAN Xiao-hua; WU Jian-fu; SHI Qing-hua   

  1. Jiangxi Agricultural University, Nanchang 330045, China
  • Received:2006-06-13 Revised:1900-01-01 Online:2007-04-03 Published:2007-04-03

Abstract: Rice-duck farming is a low-cost eco-agricultural technique with noherbicides and less insecticides application. In general, 20 day-old ducklings are released into recently transplanted rice fields at a density of 225 ducks per hectare. Their feeding and moving could help the control of weeds, insect pests and even plant diseases in the fields, and have definite effects on rice growth, soil characters, and oxygen content in field water. This paper reviewed the ecological effects and economic benefits of rice-duck farming, and suggested that the studies on precision fertilization and rice later growth stage pest management should be strengthened.

Key words: Zea mays, Grain yield potential, Nitrogen utilization efficiency, Correlation analysis, Hierarchical cluster analysis