Effect of Oyster Shell, Fly Ash and Gypsum Application on Rice Yield and Quality

패각, 석탄회 및 석고 시용이 벼 수량과 미질에 미치는 영향

  • Published : 1997.09.30


This study was conducted to investigate the combined effects of oyster shell, fly ash and gypsum on rice yield and quality. The four treatments of soil amelioration were oyster shell 4, fly ash 80, fly ash 56 + gypsum 24 and oyster shell 0.8 + fly ash 40 + gypsum 24 ton/ha. Rice yield were in the order of oyster shell, fly ash and control plats. The pH, EC values and OM, Ca, $SO_4$, moisture contents of the top-soil after rice harvesting in soil amelioration treatments were increased, while Mg, Na, Fe, Zn and Al were decreased than those of control. Rice quality was the best in the fly ash plat due to lower T-N and higher Mg/K ratio.


Oyster shell;Fly ash;Gypsum;Rice guality