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人工酸性 降雨가 大豆(Glycine max(L.) Merr)의 生長과 收量에 미치는 影響
吳福來,鄭淳柱,朴鍾成 全南大學校 農漁村開發硏究所 1986 農業科學技術硏究 Vol.21 No.-
This experiment was performed to determine the responses of soybean plants (Glysine max (L.) Merr) to simulated acid rain at various pH levels. pH levels of simulated acid rain ranged from pH 2 to pH 5. 1he amount of acid precipitation was 30㎜/40min by pH levels, and water drop size was 0.l㎜at the pressure of 2.5 bars. Sprayer was installed at 1m high from ground level and sprayed 1 time per week for six weeks. A general decrease in plant height, leaf number, leaf area and shoot dry freight was observed with decreasing pH and increasing H₂SO₄deposition. The trifoliate leaf area appeared to be the most sensitive growth parameter recorded. As acidity increased, a definite reduction in total chlorophyll, nodule weight and yield were observed across the pH gradient. Interrelationship among agronomic characters as affected by decreasing pH levels showed the significantly positive correlations regardless of characters recorded. This suggested. that one character affected greatly to the other characters. Chemical components of soil treated with simulated acid rain were not significant differences in phosphorous, potassium, calsium, magnesium and cation exchange capacity(CEC) except for pH and organic matter at 45 days after treatment.