枸溶性钾肥对铅镉污染土壤芹菜生长及铅镉吸收的影响  

Effects of Citrate Acid Soluble Potash Fertilizer on Growth and Pb and Cd Uptake of Celery in Pb and Cd Contaminated Soil

作　　者：叶芳芳[1] 崔振岭[1] 陈新平[1] 李荣[2] 孟远夺[2] 张永中 

机构地区：[1]中国农业大学资源与环境学院,北京100193 [2]全国农业技术推广服务中心土肥处,北京100026 [3]山西紫光钾业有限公司,山西吕梁033000

出　　处：《中国农学通报》2015年第26期133-138,共6页Chinese Agricultural Science Bulletin

基　　金：公益性行业(农业)科研专项"黄淮海平原钾肥高效利用与替代技术研究"(201203013-02)

摘　　要：笔者旨在研究不同钾肥对铅镉污染土壤上芹菜生长及重金属吸收的影响。通过芹菜盆栽试验得出,在铅镉污染土壤中,相同施钾量的枸溶性钾肥处理下的芹菜可获得水溶性钾肥处理下芹菜产量的80%左右;枸溶性钾肥可以提高土壤pH 0.6-0.7个单位,进而降低土壤中DTPA-Pb、DTPA-Cd含量,减少芹菜对铅镉的吸收和累积。因此,在铅镉污染土壤中,枸溶性钾肥显著促进芹菜生长,显著促进植物对钾的吸收,提高钾浓度。另外由于其特殊的理化性质,可以显著提高土壤的pH,进而降低土壤中重金属的有效性,减少作物对重金属的吸收,保证食品安全。The paper aims to study the effect of different potassium fertilizers on the growth and Pb and Cd uptake of celery in Pb and Cd contaminated soil. The results were obtained by pot experiments： with the same amount of potassium, citrate soluble potash treatment could obtain the yield which was about 80% of that underwater soluble potash treatment in Pb and Cd contaminated soil; citrate soluble potash could increase soil pH about 0.6 to 0.7 units to reduce soil DTPA-Pb and DTPA-Cd content and decrease the absorption andaccumulation of Pb and Cd of celery. Therefore, in Pb and Cd contaminated soil, citrate soluble potash could significantly promote the growth and potassium uptake of celery and increase the concentration of potassium.As for its special physical and chemical properties, citrate soluble potash could significantly raise soil pH,thereby reduce the availability of heavy metals in soil, and then decrease the absorption of heavy metals to ensure food safety.

关 键 词：枸溶性钾肥 PB CD 土壤PH 

分 类 号：X53[环境科学与工程—环境工程]