适时收获是确保粮食增产增收的重要措施。那么，主要粮食作物的最佳收获期都是什么时候呢？一、玉米当果穗苞叶变干而松散，籽粒变硬，呈现光泽，用指甲不易划破，同时植株根部叶片呈黄绿色，说明已进入完熟期。此期进行收获产量最高。如急需腾茬种麦，可在籽粒已定浆进入蜡熟 Timely harvest is an important measure to ensure that grain production and income increase. So when are the best harvests for the main food crops? First, corn When the ear bracts leaves become dry and loose, harden the grain, showing luster, easy to scratch with a nail, while the roots of plant leaves were yellow-green, indicating that has entered the mature stage. This period to harvest the highest yield. Such as the urgent need stubble crop wheat, grain can be set in the pulp into the cooked wax