Discussion on Optimized Sowing Date of Direct Seeding Rice

In this paper,Yanjing 311 and Yanjing 56 which were partial early maturing japonica rice varieties were studied on sowing date under direct sowing cultivation as the test materials.The results showed that sowing date had a greater impact on growing characteristics,yield formation and yield of rice.Under local conditions,optimized sowing date of the two varieties was between June 5 and June 20,and critical sowing date was June 25.