Effects of Irrigation Water Quality on the Growth of Paddy Rice along the Downstream of Nakdong River

낙동강(洛東江) 하류수계(下流水系) 관개수질(灌漑水質)이 벼 생육(生育)에 미치는 영향(影響)

  • Lee, Chun-Hee (Gyeongnam Provincial Office of Rural Development) ;
  • Ha, Ho-Sung (College of Agriculture, Gyeongsang National University) ;
  • Lee, Han-Seng (Gyeongnam Provincial Office of Rural Development) ;
  • Jeon, Seong-Geon (College of Agriculture, Gyeongsang National University) ;
  • Jang, Sun-Duk (Yeongnam Crop Experiment Station. ORD)
  • Published : 1985.06.25

Abstract

This study was performed to obtain some basic informations about the effects of irrigation water on the growth of rice plant. The water quality was surveyed at six pumping stations from the Nam river tributary to the downstream of Nakdong river, and sampling sites of soil and plant were five paddy fields near-by each station during rice growing periods in 1983. 1. Average value of COD was 5.1-7.1 ppm at 2 sites of the Nam river tributary, 11.4 ppm at 1 site of the midstream and 9.1-13.4 ppm at 3 sites of the downstream of Nakdong river. 2. The relationships between irrigation water and soil were $r=0.98^{**}$ for EC and $r=0.91^*$ for SAR, but the rest components did not. 3. Root activity of rice plant was low tendency as go by go the downstream of Nakdong river, and it was related to dry matter of rice plant ($r=0.62^{**}$), SAR ($r=-0.67^{**}$), and EC ($r=-0.62^{**}$) of soils.

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