玉米进口量逐年放大，但我国玉米进口实行配额制，即使配额完全用完也只有720万吨，仅占国内玉米消费量的3%左右。配额内关税按1%执行，配额外关税高达65%，这将大幅拉高进口成本，将有效抑制进口玉米过量涌入国内。总体而言，进口对国内玉米生产的安全威胁基本可控。
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