水土保持学报2013，Vol.27Issue(3)：184-188,5.
休耕轮作对黑土酸化的影响
Influence of Fallow Rotation on the Black Soil Acidification
摘要
Abstract
In order to study the effect of fallow rotation on soil pH and soil exchangeable H+ and Al3+,to study the influence of fallow rotation on soil cation exchange performance,to investigate the correlation between soil pH with soil physical and chemical properties of the fallow rotation,and to study the effect of allow rotation on soil buffering capacity and soil acidification rate,the soil samples were collected in Dehui of Jilin province.The results showed that:(1)Soil acidification was alleviated,and soil exchangeable acid (exchangeable H+ and Al3+) was decreased,soil pH increased with decreasing exchangeable acidity,and the contents of exchangeable H+,exchangeable Al3+ decreased with increasing soil organic matter content after a fallow rotation.(2)Fallow rotation measures could increase soil cation exchange capacity and soil percentage base saturation.(3)The correlation between soil pH and each base-cation was that Ca2+ ＞Na+ ＞K+ ＞Mg2+.Exchangeable Ca2+ content which accounted for 89％～95％ of the sum of base cations was the most,and it was the greatest contribution to percentage base saturation.(4)The fallow rotation measures could increase soil acidalkali buffering capacity.The highest soil acidalkali buffering capacity through the fallow rotation was more than 2 times that through a long-term continuous cropping,thus the buffering performance of soil pH enhanced,and the soil acidification rate reduced.关键词
休耕轮作/土壤pH/盐基饱和度/缓冲容量Key words
fallow rotation/ soil pH/ percentage base saturation/ buffering capacity分类
农业科技引用本文复制引用
邓琳璐,王继红,刘景双,石峰,孔凡建..休耕轮作对黑土酸化的影响[J].水土保持学报,2013,27(3):184-188,5.基金项目
国家自然科学基金项目(41071160) （41071160）
吉林省科技厅项目(20126031) （20126031）
