水稻直穗病发病机理及防控途径研究进展OA

Rice straighthead disease is a physiological disease that occurs in paddy fields transformed from drylands,often leading to rice yield reduction.Studies have shown that the cause of rice straighthead disease is that the content of dimethylarsinic acid[DMA(V)]in the soil exceeds the standard,which further hinders the development of floral organs and roots of rice plants.To reduce the loss caused by rice straighthead disease,some prevention and control approaches could be adopted in rice planting.These approaches include breeding rice varieties resistant to straighthead disease,strengthening the management of field soil environment,and applying different types of fertilizers.In terms of variety breeding,the resistance of rice to straighthead disease could be improved through breeding rice varieties resistant to this disease.In terms of field soil environment management,the loss caused by rice straighthead disease could be reduced through strengthening field water and cultivation method management and appropriately reducing soil organic matter content.In terms of fertilizer application,the accumulation of DMA(Ⅴ)in grains could be reduced through applying silicon fertilizer,iron fertilizer,phosphorus fertilizer,and sulfur fertilizer,thereby reducing the harm of rice straighthead disease.This paper summarizes the pathogenesis and main prevention and control approaches of rice straighthead disease,aiming to contribute to expanding the planting area of rice and ensuring food security.