土壤水分和膜下增氧对番茄根际土壤微生物量的影响  

Effect of Soil Moisture Content and Membrane Aeration on Soil Microbial Biomass Quantity of Tomato

作　　者：易晓华[1] 何华[2] 金静[3] 

机构地区：[1]青岛农业大学生命科学学院山东省高校植物生物技术重点实验室,山东青岛266109 [2]青岛农业大学资源与环境学院,山东青岛266109 [3]青岛农业大学农学与植物保护学院,山东青岛266109

出　　处：《北方园艺》2015年第21期172-177,共6页Northern Horticulture

基　　金：青岛科技局民生计划资助项目(14-2-3-43-nsh;6622313132);国家自然科学基金青年科学基金资助项目(621197);山东省高等学校科技计划资助项目(621129);青岛农业大学高层次人才启动基金资助项目(621114)

摘　　要：以处理后的番茄土样为试材,设置增氧和不增氧2种处理,增氧的处理方式为对盆栽灌溉5‰的双氧水,不增氧处理方式则为灌溉煮沸冷却后的水。分别对以上2种处理灌溉不同水量,获得土壤含水量分别为50%~55%、65%~70%、80%~85%的土样,用稀释涂布法测土壤中的微生物量。结果表明：在不增氧处理中,土壤含水量在50%~55%时细菌和放线菌有最大微生物量,土壤含水量为80%~85%时,真菌有最大微生物量;增氧处理中,放线菌在土壤含水量在50%~55%时有最大微生物量。在不同的含水量下,不增氧处理中的土壤微生物量都比增氧处理的土壤微生物量大;在增氧处理中,不同含水量下细菌和真菌变化不大,放线菌的量最大。This paper took treated tomato soil samples as experimental material to study changes of soil microbial biomass by using methods of oxygen-enrichment and non-oxygen-enrichment respectively.Oxygen-enrichment mode irrigation of5‰ hydrogen peroxide to the pot while non-oxygen-enrichment mode irrigation of water after cooling.Different amount of water was irrigated to tomato soil previously processed by using the above methods and soil samples with different water content of 50%-55%,65%-70%,80%-85% respectively were obtained,whose microbial biomass were further measured by employing dilute approach.The results showed that for the tomato soil without increasing oxygen,bacteria and actinomycetes had the maximum of microbial biomass when the soil moisture content reached 50%-55%,while fungi had the maximum of microbial biomass when the soil moisture content reached 80%-85%.For the tomato soil pretreated by oxygen-enrichment method,actinomycetes had the maximum of microbial biomass when the soil moisture content reached 50%-55%.The final results showed that under the condition of different moisture content,the soil without increasing oxygen contained more microbial biomass than that added with oxygen.Moreover,for the soil added with oxygen,the quantity of bacteria and fungi didn＇t change too much under different condition of soil moisture content and the quantity of actinomycetes reached the most.

关 键 词：番茄土壤 膜下增氧 水分处理 微生物量 

分 类 号：S641.206.1[农业科学—蔬菜学]