西南地区荞麦根结线虫危害与前茬作物及苦荞产量的相关性  

Correlation Between Buckwheat Root Knot Nematode Damage and Previous Crops and Yield of Tartary Buckwheat in Southwest China

作　　者：孙道旺[1] 何成兴[2] 尹桂芳[1] 卢文洁[1] 王艳青[1] 隆文杰[1] 张艳军 胡选江 刘佳 王莉花[1] SUN Dao-wang;HE Cheng-xing;YIN Gui-fang;LU Wen-jie;WANG Yan-qing;LONG Wen-jie;ZHANG Yan-jun;HU Xuan-jiang;LIU Jia;WANG Li-hua(Biotechnology and Germplasm Resources Institute,Yunnan Academy of Agricultural Sciences/Yunnan Provincial Key Lab of Agricultural Biotechnology,Key Lab of Southwestern Crop Gene Resources and Gennplasm Innovation,Ministry of Agriculture,Yunnan Kunming 650205,China;Institute of Agricultural Environment and Resource,Yunnan Academy of Agricultural Sciences,Yunnan Kunming 650205,China;Yuxi Academy of Agricultural Sciences,Yunnan Yuxi 653100,China)

机构地区：[1]云南省农业科学院生物技术与种质资源研究所/云南省农业生物技术重点实验室/农业部西南作物基因资源与种质创制重点实验室,云南昆明650205 [2]云南省农业科学院农业环境资源研究所,云南昆明650205 [3]玉溪市农业科学院,云南玉溪653100

出　　处：《西南农业学报》2021年第12期2673-2678,共6页Southwest China Journal of Agricultural Sciences

基　　金：财政部和农业农村部—国家现代农业产业技术体系(CARS-07-C-2)。

摘　　要：【目的】开展西南地区荞麦根结线虫发生危害与前茬作物及苦荞产量的相关性研究,为该地区苦荞生产合理布局和根结线虫绿色防控提供理论依据。【方法】以苦荞为试验材料,采用大田调查和人工接种试验,分析苦荞根结线虫发生危害与前茬作物及苦荞产量的相关性。【结果】前茬作物为烤烟,荞麦根结线虫发生危害最为严重,发病株率为60.47%,病情指数为23.25;其次为甘蓝,发病株率为11.95%,病情指数为3.31;玉米、马铃薯、玉米和马铃薯套种、油菜及辣椒等前茬作物,荞麦根结线虫发生危害较轻,发病株率在均5%以下,病情指数在1.00以下;玛卡和休闲地,没有发现荞麦根结线虫危害。荞麦根结线虫病害级别和病情指数与苦荞产量的线性相关方程式分别为y=-0.4175x+3.086,R^(2)=0.1473,y=-4.604x+600.35,R^(2)=0.1652,2个方程式的a值分别为-0.4175和-4.604,R^(2)值分别为0.1473和0.1652。【结论】荞麦根结线虫的发生与危害,与前茬作物密切相关,其中烟后种植苦荞,根结线虫发生危害最重,玛卡和休闲地没有根结线虫病发生;根结线虫病对苦荞产量的影响虽然呈负相关,但相关性较弱。【Objective】The correlation between the occurrence and harm of buckwheat root knot nematode and the previous crops and Tartary buckwheat yield in Southwest China was studied,which could provide a theoretical basis for the rational distribution of Tartary buckwheat production and the green prevention and control of root knot nematode in this area.【Method】Tartary buckwheat was used as experimental material,and field investigation and artificial inoculation experiment were used to analyze the correlation between root knot nematode damage and previous crops and yield of Tartary buckwheat.【Result】The results showed that when the previous crop was tobacco,the occurrence and harm of buckwheat root knot nematode was the most serious,and the incidence rate was 60.47%and the disease index was 23.25.The second was cabbage,the incidence rate was 11.95%and the disease index was 3.31.when previous crops was maize,potato,maize and potato interplanting,rapeseed and pepper,respectively the root knot nematode was less harmful,the incidence rate was less than 5%and the disease index was less than 1.00.No harm of root knot nematode was found in Maca and fallow land.The linear correlation equations of disease grade and disease index of root knot nematode to yield of Tartary Buckwheat were y=-0.4175x+3.086,R^(2)=0.1473,y=-4.604x+600.35,R^(2)=0.1652,respectively.The a values of the two equations were-0.4175 and-4.604,the R^(2)values were 0.1473 and 0.1652,respectively.【Conclusion】The occurrence and harm of buckwheat root knot nematode were closely related to the previous crops.Among them,the root knot nematode was the most harmful when planting Tartary buckwheat after tobacco,and there was no root knot nematode disease in Maka and leisure land.Although the effect of root knot nematode disease on the yield of Tartary buckwheat was negatively correlated,the correlation was low.

关 键 词：根结线虫 苦荞 发病株率 病情指数 相关性 

分 类 号：S432[农业科学—植物病理学]