- Volume 15 Issue 3
Crop Performance and Soil Chemical Properties Affected by Amounts of Normal Water after Simulated Acid Rain
인공산성(人工酸性)비 후(後) 일반(一般)비 처리량(處理量)에 따른 작물생육(作物生育)과 토양(土壤)의 화학성(化學性)
- Kim, Bok-Jin (Department of Agronomy, College of Natural Resources, Yeungnam University) ;
- Park, Suen-Do (Kyongpook Provincial Rural Development Administration) ;
- Lee, Suk-Soon (Department of Agronomy, College of Natural Resources, Yeungnam University)
- Published : 1996.09.30
A green-house experiment was conducted to investigate the growth of Chinese cabbage, radish, and soybean and changes in soil chemical properties after application of 5 and 10mm of pH 2.7 simulated acid rain(SAR) followed by 0, 5, and 10mm of pH 6.0 normal water at the three-day intervals 20 times for Chinese cabbage and radish and 42 times for soybean. The results obtained are summarized as follows: 1. Visual damages by SAR were white-yellow leaf spots, dark brown or light green leaf color, and wrinkled leaf margins in all crops. The degree of visual damages was severer at 10mm than at 5mm SAR and it was reduced as the amounts of normal water increased after SAR application. 2. Chlorophyll content was higher at 10mm than at 5mm SAR application and increased as the amounts of normal water increased after SAR application in all crops. 3. Fresh weights of Chinese cabbage heads and radish roots and grain yield of soybean were higher at 10mm than at 5mm SAR, while they increased as the amounts of normal water increased at the same SAR level. 4. Changes in the mineral contents of plants were not consistent, while S content in radish and soybean increased as the amounts of SAR increased. 5. SAR lowered soil pH, while it increased soil N and S contents. Contents of soil organic matter, P, and exchangeable Ca, Mg, and K were not affected by the amounts of SAR.