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粮食作物在成熟之前都要发生复杂的生理变化。此间要经过三个主要阶段,一是乳熟期。此时若掐破籽粒,就会有乳白色浆液流出;二是蜡熟期,籽粒里面的物质呈蜡状;三是完熟期,籽粒变硬,植株迅速枯黄,种子含水量降至20～30％。但是,不同作物,其成熟期的生理变化也不尽一致。 1玉米1 玉米成熟(完熟期)时,大多数品种茎秆变黄,叶子枯萎,果穗苞叶黄白而松散,籽粒已完全硬化并显现出本品种固有色泽,此时的含水量略高于20％。玉米是以完熟期收获产量最高,此时收获或者再稍晚
Food crops undergo complex physiological changes before they mature. Here are the three main stages, one is milky maturity. At this point if the pinch broken grain, there will be milky white milk outflow; Second, waxy, waxy inside the grain material; Third, maturity, harden the seeds, the plants quickly brown, the water content of seeds reduced to 20 to 30% . However, different crops have different physiological changes during their maturity. 1 corn 1 corn maturity (maturity), most varieties of stalks turn yellow, the leaves withered, the ear bracts yellowish white and loose, the grain has been completely hardened and showed the inherent color of the species, the water content slightly higher than 20 %. Corn is the highest yield in the mature period, at this time harvest or later