河北省稻作历史悠久，早在公元前3世纪的战国时期就已开始种植水稻，迄今有2300余年的历史。但是，由于受“迟早则衰，遇涝则兴”及稻区不断变迁等影响，单产很低，面积也不稳定。新中国成立后发展较迅速（目前我省稻田约20万hm2）。归其原因，日本稻种亦发挥了重要作用。20世? Rice cultivation in Hebei Province has a long history. Rice cultivation began in the Warring States Period of the 3rd century BC and has a history of more than 2,300 years. However, due to the “sooner or later decline, floods are affected” and the ongoing changes in rice and other effects, low yields, the area is not stable. After the founding of New China, the rapid development (currently about 200000 hm2 paddy fields in our province). The reason for this is that Japanese rice varieties have also played an important role. 20th Century?