玉米是郧阳山区的主要粮食作物,常年播种面积170万亩左右,产量约占秋粮的一半,玉米收成的丰歉,对整个地区粮食生产具有举足轻重的地位。1980年以来,由于遭受连续四年的低温冷害,致使占全区播种面积70％左右的中高山地区的大茬玉米及低山毁茬玉米秋风歉收。如与历史最高产量的1979年相比,1980年和1981年亩产分别下降34斤和70斤,总产减少13.8％和26.5％;1882年虽然面积扩大15.7万亩,但亩产仍低18斤,总产仅增3.1％。应当肯定,1975年 Corn is the main grain crops in Yunyang Mountain. The perennial planting area is about 1.7 million mu, the output accounts for about half of the autumn grain crops, and the apology and harvest of the corn harvest plays a decisive role in the grain production in the entire region. Since 1980, due to the continuous cold and chilling injury for four years, crop failure in large-crop corn and low-mountain-stubble corn accounts for about 70% of the sown area in the whole region. If, compared with 1979, the highest historical output, 34 kg and 70 kg of mu production decreased respectively in 1980 and 1981, the total output decreased by 13.8% and 26.5% respectively. Although the area was expanded by 157,000 mu in 1882, the yield per mu is still still low at 18 Kg, the total output increased by only 3.1%. It should be affirmed, 1975