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1材料与方法1.1试验材料供试水稻品种为目前天津地区生产应用的18个主要品种,对照品种为津原45。1.试验方法采用大区随机排列,不设重复,每个品种试验面积0.53hm2。试验地点为天津市原种场。试验地为多年稻田,肥力水平中等、地力均匀、排灌方便、形状规整。1.2.1育秧种子处理。播种前进行种子消毒,浸种前晒种1d,按5kg种用咪鲜胺.杀螟丹浸种4~5d,预防种传病害发生。种子捞出滤水后,按50kg干种用25%甲霜灵150g拌
1 Materials and methods 1.1 Test materials The tested rice varieties are the 18 main varieties for production and application in Tianjin at present, the control variety is Jinyuan 45.1.The test methods are randomly arranged in large area with no repetition, and the test area of each variety is 0.53hm2 . Test site for the original seed market in Tianjin. Test for many years paddy field, medium fertility level, uniform soil, irrigation and drainage convenience, shape regularity. 1.2.1 seedling seed treatment. Seed disinfection before sowing, soaking seed before sunburn 1d, according to 5kg kinds of prochloraz. Cartap shelled soaking 4 ~ 5d, to prevent the occurrence of seed propagation disease. After the seeds are taken out of the filtered water, they are mixed with 25% metalaxyl 150g by 50kg of dry seeds