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对宁乡县原来已改制成旱土种植花卉、苗木、药材、蔬菜及其他经济作物的稻田或撂荒田返土还田种植水稻的情况进行了调查。在这些田中,部分丘块种植的水稻出现了不同程度的畸形穗现象,发病轻的减产40%左右,严重的颗粒无收。发病稻株在孕穗前与健株在外观上几乎没有差别,孕穗中后期至扬花灌浆期才有明显症状,对其病状特征和发病特点进行了分析。通过选用抗病力强的品种、增施有机肥、撒施石灰、参施客土、湿润灌溉等措施可以有效地进行预防和补救。
In Ningxiang County, the paddy field or abandoned farmland where flowers, nursery stock, medicinal materials, vegetables and other cash crops have been converted into upland soil has been surveyed. In these fields, the rice planted in some of the Qiuzhu blocks suffered from varying degrees of abnormal spikes, with a slight decrease of about 40% in the incidence and no yield of serious particles. There was almost no difference in appearance between the diseased rice plants and the healthy plants before booting, and obvious symptoms were observed in the middle and late booting stages of the booting to the flowering stage of broom, and the characteristics of the disease and the characteristics of the disease were analyzed. By selecting varieties with strong disease resistance, adding organic fertilizer, spreading lime, applying soil and wetting irrigation, etc., the prevention and remedies can be effectively carried out.