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RISS 인기검색어
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염해지 우탁토양 (干拓土壤)에서 수도생육 및 수량에 미치는 토양개량제의 효과
嚴大翼,劉肅種,嚴澤鎔 전북대학교 농업과학기술연구소 1989 農大論文集 Vol.20 No.-
The study was conducted to investigate the change of salt concentration according to the application of some soil conditioners when rice plant was cultivated, and the relationship between phybicochemical properties of soil and the yield in the saline reclaimed soil. It was experimentalized in the saline reclaimed paddy field of Gyehwu island during two years (1987 to 1988), and the summarized of the conclution are as follow : 1 . The salt concentration of saturated soil solution in the used fine soil was high to 0.67 ~0.73% level. But, it was irrigated two or three times a week with irrigation water which salt concentration is 0.007% below during the cultivation and some soil conditioners were applied at the beginning to enter into the experiment. As the result, the salt concentration of saturated soil solution in fine soil was 0.22% ~0.26%, submerged soil solution and submerged water were 0.11 ~0.16% and 0.03~0.05%, respectively. They indicated that salt concentration was gradually decreased. Eventually, their salt concentration of the plots treated soil conditioners was lower than nontreatment. 2. In the gypaum plot. salt concentration was highest during three weeks after application of gypaum. But during two years after that time, salt concentration was lower than nontreatment. Therefore, the application of gypeum in the saline land was recommended 3. The added soil plot showed that salt concentration was lowest just after application of added soil. But, this plot preserved slightly higher salt concentration than compost plot after three weeks, and continued a similar concentration to compost from the latter ha]f of growing period to two fears. 4. The compost plot was slightly higher than added soil plot after application of compost, but it showed the lowest salt concentration after that time. The experiment was oonducte3 by following year, showed that it was a similar concentration to the Peat Plot and the added soil plot 5. All the plots were higher than general korean paddy field in salt concentration and pH. In the plot of compost and Miwon organic fertilizer, the content of T-N was higher. The content of O.M was higher in the plot compost pest, and Miwon organic fertilizer than other plots. C.E.C was less content than other general korean paddy field. but it is characteristic that degree of babe saturation was higher, due to increased content of exchangeable cation. 6. Because of high salt concentration of the very day when rice plant was transplanted, saturated soil solution in fine soil and submerged solution were 0.35 ~0.45% and 0.2 ~0.33%, respectively. Rice plant was suffered from saline damaged on the former half of growing period But irrigation was conducted by water which salt concentration was 0.007% below two-throe time a week. The salt concentration of saturated soil solution in fine soil, submerged soil solution and submerged water was 0.24-0.28%, 0.13-0.18% and 0.04~0.06%. respectively. Therefore the growth of rice plant was possible. 7. In exprimental period for two years, soil conditioners revealed an increased yield to be significant in comparison with nontreatment. But all the plots were the lower yield than general korean paddy field, and the grain yield between all the plots is as follow ; nontreatment< Miwon organic fertilizer<peat<Compost<Gypsum<Added soil. Finally, the application of added soil and gypsum demonstrated the effect as soil conditioners in a saline reclaimed soil.
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