大丰市地处苏北沿海中部,常年春播玉米面积在1.5万hm2。单产在6000kg/hm2,2011年由于诸多因素的影响。春播玉米大幅减产。一般4500kg/hm2,甚至低于3750kg/hm2。导致地产玉米紧缺,价格攀升。根据本场试验示范及大面积生产调查,分析其造成低产的原因并提出应对对策如下。1低产的原因1.1气候影响一般玉米种子发芽需要吸收占种子绝对干重的45%～48%的水分,即土壤水分达到田间相对持水量的 Dafeng City is located in northern Jiangsu coastal central perennial spring corn area of ​​15000 hm2. Produce at 6000kg / hm2, in 2011 by the crop disease. Spring corn slashed production. Usually 4500kg / hm2, even lower than 3750kg / hm2. The shortage of real estate corn, the price climbed. According to the field test demonstration and large-scale production survey, analysis of the causes of low yield and put forward countermeasures are as follows. 1 low yield causes 1.1 climate impact General corn seed germination need to absorb the absolute dry weight of seeds accounted for 45% to 48% of the water, that is, the soil moisture reaches the field relative water capacity