摘要
约80%重庆茶园土壤处于不适宜茶树生长土壤pH范围。在不同pH值区段内土壤酸化特征明显;当土壤pH值处于小于4.5区段时,对酸化过程的抑制能力明显减弱,pH值的降低与交换性盐基离子Ca+2的脱除速度呈明显正相关,而与交换性Mg+2的关系不明显;而当土壤pH值处于4.5～5.0以上区段时,对于酸化过程的抑制能力则明显增强,盐基脱除速度与pH的变化关系不明显;土壤pH值处于大于5.0以上区段时,交换性Ca+2,Mg+2及盐基饱和度与pH值呈明显正相关。
In Chongqing, soil pH of approximately 80% of tea garden soils was found to fall in the category 'unsuitable to teat growth'. In various pH ranges, soil acidification manifested distinct characteristic features. When soil pH dropped to 4.5, the buffering capacity of the soil to the process of acidification weakened significantly and exchangeable base Ca^(+2) desaturation decreased together with soil pH. When soil pH ranged from 4.5 to 5.0, the buffering capacity increased markedly, and the correlation between base desaturation and the changes in soil pH was non-significant. When soil pH was higher than 5.0, the bases Ca^(+2) and Mg^(+2) and base saturation increased with soil pH.
出处
《西南农业大学学报（自然科学版）》
CSCD
北大核心
2004年第1期15-17,共3页
Journal of Southwest Agricultural University
基金
重庆市重大科技攻关项目"三峡库区农业面源污染控制战略决策及关键技术研究与示范"资助(027418)
关键词
重庆
茶园土壤
酸化特征
Chongqing
tea garden soil
features of acidification
