草甘膦对油茶林土壤微生物数量及酶活性的影响  

Effect of glyphosate on number of soil microbial and enzyme activity of Camellia forest

作　　者：陈隆升[1,2] 陈永忠[1,2] 彭映赫 李志刚[1,2] 彭邵锋[1,2] 唐炜[1,2] 

机构地区：[1]湖南省林业科学院,湖南长沙410004 [2]国家油茶工程技术研究中心,湖南长沙410004

出　　处：《湖南林业科技》2015年第4期32-35,共4页Hunan Forestry Science & Technology

基　　金：湖南省林业科技计划"林地除草剂对油茶林影响的研究"(XLK201413)

摘　　要：以草甘膦为除草剂,研究其对油茶林土壤微生物及酶活性的影响。结果表明:草甘膦处理60天后,土壤真菌、细菌和放线菌的生长均受到极显著的抑制,分别比对照减少了44.7%、58.2%和54.7%;草甘膦处理150天后,土壤真菌、放线菌的数量仍极显著少于对照,但细菌数量显著高于对照。土壤脲酶、磷酸酶和过氧化氢酶的活性在草甘膦处理60天后均显著低于对照;草甘膦处理150天后,土壤脲酶的活性则由抑制转变为激活,高于对照7%;土壤磷酸酶活性的抑制作用有所缓解,土壤过氧化氢酶活性的抑制作用则有所增加。草甘膦处理60天、150天后,土壤、油茶果实、叶片中均未检测出有草甘膦残留。Effect of glyphosateon soil microbial and enzyme activity of Camellia forest was studied in this article. The result showed that after glyphosate treatment 60 d,the number of soil fungi,bacteria and actinomycetes were subject to very significant growth inhibition,it decreased 44. 7%,58. 2% and 54. 7% respectively,which compared with the control. After glyphosate treatment 150 d,the number of soil fungi and actinomycetes is still highly significant than the control,but the number of bacteria was significantly higher than the control. After glyphosate treatment 60 d,soil urease,phosphatase and catalase activity were significantly than the control. After glyphosate treatment 150 d,soil ureaseactivity from inhibition to activation,7% higher than the control. The soil phosphatase activity inhibition eased,soil catalase activity inhibition is increased. After glyphosate treatment 60 d and 150 d,there were nono detectable residues of glyphosate in soil,camellia fruits and leaves.

关 键 词：油茶 除草剂 草甘膦 土壤微生物 土壤酶活性 

分 类 号：S154.3[农业科学—土壤学]