摘要
为预测硫包膜控释肥施用后大量硫膜残留对土壤生态系统造成的危害,设置硫膜材料添加量不同的室内淋溶试验,以研究控释肥硫膜材料对土壤淋溶特性的影响。研究结果表明:成分和量等同于硫膜的粉状硫磺可显著改变酸性棕壤淋溶液的pH和EC值及K+、Na+、Ca2+、Mg2+、SO42-的浓度,5次淋溶累计淋失的K+、Na+、Ca2+、Mg2+、SO42-随粉状硫磺加入量的增加而增加。而硫包膜尿素处理除对土壤SO42-、K+淋溶影响不明显外,对其他指标的影响较明显。试验同时发现,由于硫膜和粉状硫磺的物理形态不同,短期内对土壤淋溶特性的影响也有较大差异,但粉状硫磺的表现可以反映硫膜积累并转化后对土壤的影响。
The objective of this study was to predict the potential influence of sulfur coating material （SCM） left in soil by using sulfur-coated fertilizer （SCF） on agriculture ecosystem. In order to find the effects of sulfur from SCU on soil leaching characteristics, a leaching trial which included 6 treatments was conducted. The results of the experiment indicated that the pH value, EC value of brown soil leachate and its K^＋, Na^＋ ,Ca^2＋, Mg^2＋ ,SO4^2- contents have been changed markedly by applied sulfur powder which equal to sulfur-coating of SCF. And the summations of K^＋, Na^＋,Ca^2＋,Mg^2＋,SO4^2- in leachate including all 5 times increased along with adding more sulfur powder. Except for SO4^2-,K^＋, the other indexes of soil leachate have been influenced prominently by applied SCU. Otherwise, the sulfur-coating of SCU were not same as sulfur powder affecting soil leaching characteristics in short time because they have different physical figures. But the effects of sulfur powder on soil leaching characteristics may cover for sulfur-coating influences when sulfur-coating accumulated and transformed.
出处
《水土保持学报》
CSCD
北大核心
2006年第3期21-24,共4页
Journal of Soil and Water Conservation
基金
国家"948"项目(971053)
农业部跨越计划项目(2001-跨8)
农业科技成果转化项目(农计函[2004]514号)资助
关键词
控释肥硫膜
酸性棕壤
淋溶特性
土壤电导率
sulfur-coating from sulfur-coated fertilizer
acidic brown soil
leaching characteristics
electrical conductivity （EC）of soil
