Effect of Nitrogen Fertilizer Level and Planting Density on the Occurrence of Bacterial Leaf Blight of Rice

질소시비량 및 재식밀도가 수도 백엽고병 발병에 미치는 영향

  • Choi Y. C. (Dept. of Plant pathology, IAS., O.R.D.) ;
  • Yun M. S. (Dept. of Plant pathology, IAS., O.R.D.) ;
  • Uhm K. B. (Dept. of Entomology, IAS., O.R.D.)
  • 최용철 (농촌진흥청 농업기술연구소 병리연구담당관실) ;
  • 윤명수 (농촌진흥청 농업기술연구소 병리연구담당관실) ;
  • 엄기백 (농촌진흥청 농업기술연구소 곤충연구담당관실)
  • Published : 1980.12.01

Abstract

In order to investigate the relationship among the occurrence of bacterial leaf blight, amount of nitrogen application and planting density, a field experiment was carried out with factorial combinations of N levels (7.5, 15, 30kg/10a) and planting densities (10\times20,\;15\times30,\;20\times40cm). The results obtained in this study were; (1) The incidence of bacterial leaf blight was increased with increase of nitrogen application; (2) In double amount of nitrogen application (30kg/10a), the incidence of bacterial leaf blight was higher, regardless of planting density; (3) The incidence of bacterial leaf blight in Standard nitrogen application was significantly higher $(R=0.94^{**})$ than at $15\times30cm$ density and $20\times40cm$ planting density.

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