适时收获是一项无需增加任何投入的增产措施,但不同的作物都具有各自的适宜收获期,只有在适期内收获才能提高产量和品质;收获过早或过晚,不仅产量低,品质也差。1玉米玉米的收获适期在完熟期。此时果穗苞叶变白干枯,籽粒灌浆停止,“乳线”消失,基部变硬,其含水量在30%左右。但目前生产上普遍存在着收获偏早的现象,特别是对于一些具有 Timely harvest is an increase without any additional inputs, but different crops have their own suitable harvest period, harvesting only in the right period to increase yield and quality; harvest too early or too late, not only low yield, quality difference. 1 maize corn harvest period at maturity. At this moment, the ear bracts leaves turn white and dry, grain filling stops, “milk line ” disappears and the base becomes harder, and the water content is about 30%. However, the current phenomenon of premature production is widespread, especially for some