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对农业来说，立秋意味着丰收在望。黑龙江：黑土育丰收玉米长势喜人在我国粮食主产区的黑龙江，这个时候，光合作用旺盛，玉米进入灌浆期，籽粒开始发育并积累淀粉、蛋白质等营养物质，正是形成产量的关键时期。画面中