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水稻是我国的主要粮食作物。随着氮肥施用量的增加等原因,近年稻瘟病在部分地区有加重的趋势,已成为影响水稻持续增产的严重障碍。1985年江西早稻叶瘟发病面积400万亩,减产4亿斤,是近十几年来发病最重的一年。实践证明,选用抗病良种是增产增收的有效措施。抗谱测定,可为育种提出抗源依据。本试验选用6群16个小种对江西省提供的40个品种(系)进行了抗谱测定,同时还进行了田间人工接种、自然诱发三病(稻瘟病、白叶枯病、纹枯病)的鉴定,为全面评价品种(系)的多抗病性提供依据。简述于后:
Rice is China’s main food crop. With the increase of the amount of nitrogen fertilizer application and other reasons, in recent years, the blast has a tendency of aggravating in some areas and has become a serious obstacle to the continuous increase of rice yield. In 1985, the disease area of early stage rice blast in Jiangxi reached 4 million mu and its output was reduced by 400 million kg. It was the most serious year in recent ten years. Practice has proved that the use of disease-resistant varieties is an effective measure to increase production and income. Anti-spectrum determination, for breeding proposed sources of resistance. In this experiment, 16 groups of 6 breeds were used to determine the anti-spectrum of 40 cultivars (lines) provided by Jiangxi Province. At the same time, artificial inoculation was also conducted in the field to naturally induce three diseases (blast, bacterial blight, ) Identification, in order to fully evaluate the variety (line) to provide a basis for multi-disease resistance. Shortly after: