镉、豆磺隆联合胁迫下黑土质量的变化  

Effect of Cd and Chlorimuron-ethyl on the soil quality of phaiozem

作　　者：金彩霞[1] 周启星[2] 陈秋颖[1] 刘军[1] 

机构地区：[1]河南师范大学化学与环境科学学院,河南新乡453007 [2]中国科学院沈阳应用生态研究所陆地生态过程重点实验室,沈阳110016

出　　处：《辽宁工程技术大学学报（自然科学版）》2008年第3期461-464,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家杰出青年科学基金资助项目(20225722);中科院知识创新工程重要方向资助项目(KZCX-SW-416);国家自然科学基金重点资助项目(20337010)

摘　　要：采用盆栽试验研究了黑土Cd单一污染和Cd-豆磺隆复合污染胁迫与土壤脲酶、磷酸酶活性的关系,同时分为拔节期、开花期和成熟期三个时期研究了在有或无污染物作用下这2种酶活性的动态变化规律。结果表明,无论是在有或无豆磺隆胁迫下,随着Cd污染浓度的增加,脲酶活性呈现出明显的下降趋势,酸性磷酸酶活性变化相对于脲酶比较稳定。通过拟合方程可知,2种酶活性变化在一定程度上可以反映Cd或Cd-豆磺隆的污染状况。在小麦的整个生长期内,当Cd污染浓度为5、10、30 mg.kg-1时,2种酶活性均呈现先升高后下降的趋势;而在高浓度(50、100mg.kg-1)Cd作用下,2种酶活性始终呈现升高的趋势。The experiment of changes of urease and phosphatase activity under cadmium （Cd） and joint effect of Cd and chlorimuron-ethyl on phaiozem using pot experiment is studied. The study shows that activity of urease decreased with increasing concentration of Cd even if without chlorimuron-ethyl. Urease and phosphatase activity can be an index of Cd and chlorimuron-ethyl pollution of soil through fitting equations. We must consider the correlation of Cd and chlorimuron-ethyl and different growing periods of plants if we use activity of urease and phosphatase as an index of Cd and chlorimuron-ethyl pollution of soil. We found that trend of changes of urease and phosphatase activity was higher in anthesis, and then lower in the mature stage when the concentration of Cd added was low （〈50mg·kg^-l）. But the trend of changes of urease and phosphatase activity was higher in whole growing period of wheat when the concentration of Cd added was higher （50mg·kg^-1 and l00mg·kg^-1）.

关 键 词：黑土 CD 豆磺隆 脲酶 磷酸酶 

分 类 号：S154.2[农业科学—土壤学]