一、生产概况玉米是平泉县的主要粮食作物之一,近年来种植面积29万亩左右,占作物种植面积的41％。由于受低温春旱等灾害的影响,平均亩产只有210公斤,上下波动65.5公斤。为了改变这一低而不穗的状况,他们1986年搞了玉米地膜覆盖试验,示范面积156 I. Production Overview Maize is one of the main grain crops in Pingquan County. In recent years, the planting area has reached 290000 hectares, accounting for 41% of the crop planting area. Due to the impact of disasters such as drought and drought at low temperature, the average yield per mu is only 210 kilograms, fluctuating up and down by 65.5 kilograms. In order to change this low and non-spike situation, they engaged in corn mulching test in 1986, the demonstration area of ​​156