甘肃省干旱灌区连作马铃薯根际土壤中镰刀菌的变化  

Changes of Fusarium in rhizosphere soil under potato continuous cropping systems in arid-irrigated area of Gansu Province

作　　者：牛秀群[1,2] 李金花[1,3] 张俊莲[1] 沈宝云[1] 柴兆祥[3] 王蒂[1] 

机构地区：[1]甘肃省作物遗传改良与种质创新重点实验室,甘肃兰州730070 [2]甘肃省天水市农业科学研究所,甘肃天水741001 [3]甘肃农业大学草业学院,甘肃兰州730070

出　　处：《草业学报》2011年第4期236-243,共8页Acta Prataculturae Sinica

基　　金：科技支撑计划(2006BAD21B053);农业部马铃薯产业技术体系(gwzj-19);农业部行业专项(nyhyzx07-006-3)资助

摘　　要：为了深入了解根际土壤镰刀菌分布与马铃薯连作之间的关系,以＂大西洋＂品种为试材,采用根残体分离法,研究了轮作和连作茬口的马铃薯根际土壤中镰刀菌的变化趋势。结果表明,在不同茬口根际土壤中共分离到8个种的镰刀菌,玉米-马铃薯轮作茬口的优势种为再育镰孢,分离频率为23.34%;连作1~3年茬口的优势种均为茄病镰孢,分离频率分别为30.78%,37.70%和45.48%。随着连作年限的增加,马铃薯根际土壤镰刀菌数量呈上升趋势,但不同菌种的数量变化趋势各异,尖孢镰孢、茄病镰孢呈上升趋势,黄色镰孢、再育镰孢呈下降趋势,木贼镰孢变化较为平稳。For a thorough understanding of the relationships between the distribution of Fusarium in rhizosphere soil and potato continuous cropping systems,the changes of Fusarium in rhizosphere soil under potato continuous cropping and rotation cropping were studied by way of root debris separation using the cultivar Atlantic.There were 8 species of Fusarium from rhizosphere soils of different rotations.F.proliferatum was the dominant species of corn-potato rotation systems with a separation frequency up to 23.34%,but in rhizosphere soils of potato continuously cropped for 1-3 years,F.solani was the dominant species with separation frequencies up to 30.78%,37.70% and 45.48%.With long term continuous cropping of potato,the total amount of Fusarium tended to increase but there were changes in the different Fusarium species.The amounts of F.solani and F.oxysporum increased while the amounts of F.culmorum and F.proliferatum decreased,and the amount of F.equesiti did not changed.

关 键 词：镰刀菌 马铃薯 连作 

分 类 号：S435.32[农业科学—农业昆虫与害虫防治]