水稻塑料软盘育苗抛栽技术在我国南方稻区已很普及,但每年早稻抛栽后过了返青期,都会有部分山坑冷浸田或长期渍水的深泥田出现僵苗现象,表现为水稻明显生长不良,少分蘖或不分蘖,植株矮小,叶片变成红褐色,远望如火烧焦状。检查稻田,未见病虫为害,拔取稻株,见稻根严重坏死,呈深褐色或变黑发臭,新根极少或无新根。经现场对比分析和对农户栽培管理措施的调查,诊断为水稻赤枯病。病苗虽然会随着气温升高而逐渐转入正常生长,但终因早期分蘖少、有效穗数不足而致减产30%～50%。 Rice plastic floppy disk nursery shoots throwing technology has been very popular in the rice paddy in southern China, but after returning to the green rice after throwing early rice every year, there will be part of the mountain pit cold paddy field or long-term waterlogging deep mud appeared stiff seedling phenomenon, manifested as rice Obviously poor growth, less tillering or tillering, short plants, the leaves turn reddish-brown, far looks like burning fire-like. Check the rice fields, no pest damage, unpicked rice plants, see the serious necrosis of rice roots, dark brown or black hair stink, little or no new roots roots. The field comparative analysis and investigation of farmers’ cultivation and management measures, the diagnosis of rice red blight. Although the disease will gradually turn into normal growth with the temperature rise, but the end due to the early tillering less effective spike caused by the yield reduction of 30% to 50%.