湖北恩施烟区长期连作烟田影响南方根结线虫密度的土壤理化特性分析  

Soil physical and chemical characteristics influencing Meloidogyne incognita density in long-term continuous tobacco growing fields in Enshi,Hubei

作　　者：施河丽 彭五星 左梅 陈红华 谭军 尹忠春 向必坤 SHI Heli;PENG Wuxing;ZUO Mei;CHEN Honghua;TAN Jun;YIN Zhongchun;XIANG Bikun(Enshi Branch of Hubei Provincial Tobacco Company,Enshi 445000,Hubei,China)

机构地区：[1]湖北省烟草公司恩施州公司,湖北省恩施市445000

出　　处：《烟草科技》2020年第12期9-15,共7页Tobacco Science & Technology

基　　金：国家烟草专卖局科技重点项目“基于宏基因组学的植烟土壤健康评价研究与应用”(110201402016);中国烟草总公司湖北省公司科技项目“烟草根结线虫发生的土壤障碍因子分析及防控技术研究”(027Y2018-001)。

摘　　要：为明确湖北省恩施烟区长期连作烟田中影响南方根结线虫密度的土壤理化特性指标,减轻烟草根结线虫病对烟草的危害,在烟草根结线虫病发生严重且典型的湖北恩施宣恩烟区采集土壤样品23份,测定了土壤理化特性指标和南方根结线虫密度,并对土壤理化特性指标与南方根结线虫密度间进行了逐步回归分析、相关分析和通径分析。结果表明:土壤有效磷、交换性钾和交换性镁含量指标对南方根结线虫密度有显著影响,综合效应排序依次为交换性钾>交换性镁>有效磷,且交换性钾含量(质量分数)对南方根结线虫密度的影响为正效应,有效磷和交换性镁含量对南方根结线虫密度的影响为负效应。因此,对于湖北恩施烟区长期连作烟田中南方根结线虫的防控,建议实施稳钾、增磷、补镁的技术措施。In order to clarify the soil physical and chemical characteristics that affect the Meloidogyne incognita density in the long-term continuous tobacco cropping fields in Enshi,and to reduce the damage of Meloidogyne incognita on tobacco,23 soil samples were collected from Xuan’en areas in Enshi,Hubei Province,where the disease was serious and typical.The physical and chemical characteristics of the soil and the density of Meloidogyne incognita were analyzed by stepwise regression,correlation and path analyses.The results showed that the contents of available phosphorus,exchangeable potassium and magnesium in soils had significant effects on the density of Meloidogyne incognita,with the comprehensive effects in the order of exchangeable potassium>exchangeable magnesium>available phosphorus.Exchangeable potassium content(mass fraction)had positive effects,while available phosphorus and exchangeable magnesium contents had negative effects on the density of Meloidogyne incognita.Therefore stabilizing potassium,increasing phosphorus and supplementing magnesium were suggested measures for controlling Meloidogyne incognita in the long-term continuous tobacco cropping fields in Enshi.

关 键 词：恩施烟区 烟草 南方根结线虫 土壤 理化特性 

分 类 号：S43[农业科学—农业昆虫与害虫防治]