夏玉米是我省的主要秋粮作物,常年种植2000多万亩。农民为了早腾茬种麦,往往在夏玉米未到收获期就掰棒收获,造成减产。我们经过三年的试验、调查,农民一般在玉米有65%的枯黄叶片时掰棒收获,比正常收获期(90%叶片枯黄)减产10～12%。如果采取带秆收获,同样也在65%枯黄叶时收获,减产仅5～8%。玉米带秆收获适期在 Summer corn is the main autumn crop in our province, perennial planting more than 2000 mu. Farmers in order to grow stubble wheat, tend to break the stick harvest in the summer corn harvest, resulting in reduced production. After three years of experiments, we surveyed that peasants generally broke harvested rods when they had 65% of yellowish corn leaves and cut 10-12% of their normal harvest (90% of leaves were yellowish). If you take stalk harvest, also harvested in 65% of yellow leaves, cut only 5 to 8%. Corn stalk harvest in the period