因此，耐冷育种目标和品种因稻区而异。
Thus the breeding goals for cold tolerance were different on various rice cropping regions.
文中讨论了双季稻区稻水象甲生活史对策的适应意义。
The ecological implication of this life history strategy of rice water weevil was discussed.
褐飞虱在中国分布很广，近年来已成为南方稻区的主要害虫。
Brown plant hopper distributes very wide, and it has been the major rice insects in Southern China.
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