过早或过晚地收获油料作物,其结果对产量和品质都会造成一定影响。 1、大豆过早收获,子粒尚未成熟,蛋白质和脂肪的含量不高,降低含油率;过晚收获,豆荚炸裂,子粒落地减产。一般来说,在大豆黄熟末期就可始收,此时田间有80%以上的植株叶片、叶柄脱落,植株变黄褐色,茎和荚全变成黄色,用手摇动 Harvesting oilseed crops too early or too late can have some effect on yield and quality. 1, premature harvest of soybean, grain is not yet mature, protein and fat content is not high, lower oil content; too late harvest, pods burst, grain yield reduction. Generally speaking, at the end of the yellow ripening stage, the harvest can begin. At this time, more than 80% of the plant leaves in the field fall off from the petiole, the plants turn yellowish brown, the stems and pods turn into yellow,