(一)选择优良品种:朱思浩所选择的品种主要有:碧春、津杂二号、津杂3、4号等抗病高产良种。由于各地气候、土质不同,所选品种要因地制宜,不可照搬。(二)培育壮苗:(1)土壤消毒:下种前用百菌清消毒。(2)浸种催芽:先将种子投入55℃温水中浸种20分钟,捞出后用纱布包好,用2000倍高 (A) select the fine varieties: Zhu Sihao selected varieties are: Bichun, Tianjin hybrid No. 2, Tianjin No. 3,4 and other resistant high yielding varieties. Due to different climates and soil types, the selected varieties should be adapted to local conditions and can not be copied. (B) nurturing strong seedlings: (1) soil disinfection: chlorothalonil disinfectant before the next species. (2) soaking seed germination: the seeds into 55 ℃ warm water soaking for 20 minutes, remove and wrap with gauze, with 2000 times higher