土壤pH 6.5是河南烟草青枯病发生的阈值  

Soil pH 6.5 is Occurrence Threshold of Tobacco Bacterial Wilt Disease in Henan

作　　者：王海涛[1] 李小杰[1] 许晓敬 黄海棠 陈玉国[1] 李淑君[1] 赵凤霞[1] 宋学立[1] 杨立均 WANG Haitao;LI Xiaojie;XU Xiaojing;HUANG Haitang;CHEN Yugu;LI Shujun;ZHAO Fengxia;SONG Xueli;YANG Lijun(Institute of Tobacco Research,Henan Academy of Agricultural Sciences,Xuchang,Henan 461000,China;Zhumadian Branch of Henan Provincial Tobacco Company,Zhumadian,Henan 463000,China)

机构地区：[1]河南省农业科学院烟草研究所,河南许昌461000 [2]河南省烟草公司驻马店市公司,河南驻马店463000

出　　处：《土壤》2020年第5期1033-1037,共5页Soils

基　　金：驻马店市烟草公司科研项目(201641170024101)资助。

摘　　要：通过对河南21个有烟草青枯病史的烟田和周边91个无病史的烟田调查研究表明:有病史烟田在罗山、平桥、确山、泌阳、遂平和西平6个县(区),土壤pH主要分布在5.5~6.5(占调查烟田总数的84.75%);周边无病史的烟田在唐河、正阳、上蔡、社旗、舞阳和城区6个县(区),土壤pH主要分布在6.5~7.0(占调查烟田总数的81.25%)。有病史的6个县(区)与无病史的6个县(区)在土壤pH上存在显著的差异,土壤pH 6.5是河南烟草青枯病发生的阈值。土壤pH与纬度之间具有极显著的正相关性(y=0.7375x–17.799,R2=0.386,P<0.01),由此推测土壤pH 6.5地理分界线大致在北纬33°,其以北烟区烟草青枯病发病机率低。In this paper,21 and 91 tobacco-planting fields with and without bacterial wilt disease were surveyed and studied,the results showed that bacterial wilt disease were occurred in the tobacco-planting fields in Luoshan,Pingqiao,Queshan,Biyang and Suiping,soil pH were mainly ranged from 5.5 to 6.5(accounted for 84.75%);while no bacterial wilt disease was happenedin the tobacco-planting fields in the circumjacent regions including Tanghe,Zhengyang,Shangcai,Sheqi,Wuyang and Chenqu,soil pH were mainly ranged from 6.5 to 7.0(accounted for 81.25%).Significant difference was found in soil pH values between the two regions with and without bacterial wilt disease,and soil pH 6.5 could be regarded as the occurrence threshold of tobacco bacterial wilt disease in Henan.There was extremely significantly positive linear correlation between soil pH and latitude(y=0.7375x-17.799,R2=0.386,P<0.01),north latitude 33°could be regarded as the geographic boundary of soil pH 6.5,and bacterial wilt disease is less likely occur in the north of this boundary.

关 键 词：土壤PH 青枯病 烟草 河南 

分 类 号：S435.72[农业科学—农业昆虫与害虫防治]