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当前位置: 首页 > 文章 > 甜瓜连作对其根际土壤微生物和酶活性的影响 北方园艺 2015 (19) 158-161
Position: Home > Articles > Effect of Melon Continuous Cropping on Rhizosphere Soil Microorganisms and Enzyme Activities Northern Horticulture 2015 (19) 158-161

甜瓜连作对其根际土壤微生物和酶活性的影响

作  者：
周艳丽;乔宏宇;高红春;李爽
单  位：
吉林农业大学园艺学院;中农赛世农业科技有限公司
关键词：
连作;微生物;酶活性;甜瓜
摘  要：
以大棚甜瓜连作土壤为研究对象,选择种植1、3、5、7、9年甜瓜大棚,采集根区土壤,采用平板计数法对土壤中细菌、真菌和放线菌数量进行统计,测定种植1年和连续种植3、5、7、9年甜瓜大棚土壤中细菌、真菌和放线菌数量及土壤酶活性的变化。结果表明:随着种植年限的增加,土壤中微生物总量、细菌和放线菌的数量呈现先升高后降低的趋势;真菌数量则呈上升趋势,且连作9年时真菌数量极显著增加。脲酶(Urease,UREA)、多酚氧化酶(Polyphenol oxidase,PPO)和过氧化氢酶(Catalase,CAT)的活性也呈现先升高后降低的变化趋势,UREA活性在连作3年时最高,PPO和CAT活性在连作5年时活性最高;而蔗糖酶(Saccharase,SAC)活性随着连作年限的增加呈降低的趋势,连作7年时活性极显著下降。表明甜瓜连作9年,根际土壤微生物结构失调,微生物由"细菌型"向"真菌型"过渡,土壤酶活性下降,连作障碍明显。
译  名：
Effect of Melon Continuous Cropping on Rhizosphere Soil Microorganisms and Enzyme Activities
作  者：
ZHOU Yanli;QIAO Hongyu;GAO Hongchun;LI Shuang;College of Horticulture,Jilin Agricultural University;Zhangwu Juno Science Agriculture Technology Co.Ltd.;
关键词：
continuous cropping;;microbial;;activities of soil enzymes;;melon
摘  要：
Taking melon continuous cropping soil in plastic greenhouse as test material,the plastic greenhouse with planting years of 1,3,5,7and 9was selected and the tilling layer soil in root zone was collected to determine the number of bacteria,actinomycetes,and fungi by plate count method,and soil enzyme activity was studied by colorimetric method and titration.The results showed that with the increasing of continuous cropping years,the number of bacteria,actinomycetes as well as total microbe showed a trend of increasing first and then decreasing,the number were the most at continuous cropping 5years;while the number of fungi increased,and significantly increased at continuous cropping 9years.The activities of urease(UREA),polyphenol oxidase(PPO)and catalase(CAT)had a similar trend as the number of bacteria,the urease activity was the highest at continuous cropping 3years,and the polyphenol oxidase and catalase activity were the highest at continuous cropping 5years,while the saccharase(SAC)activity increased significantly at continuous cropping 7years.The balance of rhizosphere soil microbial flora was destroyed and the enzyme activities of rhizosphere at continuous cropping 9years,the obstacles of continuous cropping were obvious.

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