【摘要】 对玉米品种郑单 1 8进行播期试验。结果表明 ,5月 2 6日～ 6月 5日播种 ,产量差异不大。 6月 5日以后播种 ,每晚播 1d ,产量降低 1 5 7.5 1 8kg/hm2 。更多还原

【Abstract】 Sowing date experiment of corn variety Zhengdan 18 at Anyang city in 2002 indicated that there were no obvious differences between the yields of the two sowing dates,i.e.,May 26 and June 5.The grain yield decreased by 157.518 kg/ha with every one day delaying of sowing time from June 5.更多还原