天津地区是华北粳稻的重要产区。解放以来,由于施肥水平的迅速提高,稻瘟病亦相应有所扩展,成为水稻增产的主要威胁。在生产实践中,不同的水稻品种同对稻瘟病的抗病性有显著差异。军粮城稻作试验站自1950年开始进行品种抗病性调查,1954年正 Tianjin is an important producing area of ​​North China. Since the liberation, due to the rapid increase of fertilization level, blast has correspondingly expanded and become the main threat to the increase of rice yield. In the practice of production, different rice varieties have significant differences with the resistance to blast. Junliang City, rice test station since 1950 began a variety of disease resistance survey, 1954 is positive