CAJ | 학술논문

珠江三角洲潮土和水稻土对不同种类的酸具有一定的缓冲性,不同种类的酸对不同类型土壤的酸化趋势不同.大旺水稻土对酸的敏感性强于龙山潮土,龙山潮土属于稍易受害的稍敏感土壤,大旺水稻土属于易受害的敏感土壤;同一土壤对酸的缓冲能力比对碱的缓冲能力强;不同种类的酸对土壤的敏感性不同,土壤对硝酸的敏感性强于对硫酸的敏感性;土壤加酸后酸缓冲曲线和土壤中铝释放曲线的交点可以作为衡量土壤对酸敏感性的指标,交点越低,敏感性越强;加酸后土壤中铝的释放可以用模型y=nx+k来预测.
주강삼각주조토화수도토대불동충류적산구유일정적완충성,불동충류적산대불동류형토양적산화추세불동.대왕수도토대산적민감성강우룡산조토,룡산조토속우초역수해적초민감토양,대왕수도토속우역수해적민감토양;동일토양대산적완충능력비대감적완충능력강;불동충류적산대토양적민감성불동,토양대초산적민감성강우대류산적민감성;토양가산후산완충곡선화토양중려석방곡선적교점가이작위형량토양대산민감성적지표,교점월저,민감성월강;가산후토양중려적석방가이용모형y=nx+k래예측.
Longshan soil and Dawang soil were selected as typical fluvo-quic soil and paddy soil of Pearl River Delta, and their buffer characters were investigated. The results showed that the sensitivity of the soil to alkali was stronger than to acid, both of Longshan soil and Dawang soil had a certain buffer to acid, but their acid sensitivity was different. Dawang soil was more sensitive to acid than Longshan soil, according to their soil acid-damage capacities, Longshan soil and Dawang soil were classified as slightly vulnerable sensitive soil and vulnerable sensitive soil respectively. Because of different acidification ability of nitric acid and sulfuric acid, the two types of soil were more sensitive to nitric acid than to sulfuric acid. Intersection point of buffer curve and aluminum release curves of soil could serve as an indicator of soil acid sensitivity. The lower of the intersection point, the greater sensitivity of soil would be. The release of aluminum in soil after adding acid could be predicted by the model of y=nx+k.