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The relative importance of soil moisture in predicting bacterial wilt disease occurrence

Soil Ecology Letters 2021年第4期3卷 356-366页

作者： Gaofei Jiang Ningqi Wang Yaoyu Zhang Zhen Wang Yuling Zhang Jiabao Yu Yong Zhang Zhong Wei Yangchun Xu Stefan Geisen Ville-Petri Friman Qirong Shen Key Laboratory of Plant immunity Jiangsu Provincial Key Laboratory for Organic Solid Waste UtilizationJiangsu Collaborative Innovation Center for Solid Organic Waste Resource UtilizationNational Engineering Research Center for Organic-based FertilizersNanjing Agricultural UniversityNanjing 210095China College of Resources and Environment Key Laboratory of Efficient Utilization of Soil and Fertilizer ResourcesSouthwest UniversityChongqing 400715China Laboratory of Nematology Wageningen University&ResearchWageningenThe Netherlands Department of Biology University of YorkYO105DDUK

Soil-borne plant diseases cause major economic losses *** is partly because their epidemiology is difficult to predict in agricultural fields,where multiple environmental factors could determine disease *** we used a combination of field sampling and direct experimentation to identify key abiotic and biotic soil properties that can predict the occurrence of bacterial wilt caused by pathogenic Ralstonia *** analyzing 139 tomato rhizosphere soils samples isolated from six provinces in China,we first show a clear link between soil properties,pathogen density and plant ***,disease outcomes were positively associated with soil moisture,bacterial abundance and bacterial community *** on soil properties alone,random forest machine learning algorithm could predict disease outcomes correctly in 75%of cases with soil moisture being the most significant *** importance of soil moisture was validated causally in a controlled greenhouse experiment,where the highest disease incidence was observed at 60%of maximum water holding ***,our results show that local soil properties can predict disease occurrence across a wider agricultural landscape,and that management of soil moisture could potentially offer a straightforward method for reducing crop losses to ***.

关键词： bacterial wilt disease Soil moisture Soil physicochemical properties rhizosphere bacterial communities Ralstonia solanacearum Random forest algorithm

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