以辽单588亲本为试验材料，在三个不同生态区域杂交制种，研究不同生态区气象因子及收获期对玉米种子活力影响。结果表明: 不同生态区与收获期的同一杂交组合的种子活力指标差异明显。不同收获期种子的籽粒含水量下降趋势为海南＞甘肃＞辽宁。脱水速率平均为：海南(1.13)＞甘肃（0.69）＞ 辽宁（0.53）。灌浆速率平均为：海南（1.00）＞甘肃（0.55）＞ 辽宁（0.37）。制种区域的活动积温与活力指标呈极显著正相关；有效积温与活力指标呈显著正相关；降雨量与标准发芽率和冷发芽值呈显著负相关，与人工加速老化值相关性不显著；日照时数与标准发芽率和人工加速老化值均达到显著正相关，与冷发芽值相关不显著。综合考虑辽单588高活力种子在辽宁地区适宜收获期为授粉后53天,甘肃地区为授粉后56天,海南地区为授粉后47天。
英文摘要:
In order to study the effects in different ecological areas of meteorological factors and harvest time on seed vigor of maize,the parents of Liaodan 588 hybrid were used as experimental materials in three different ecological regions for seed corn.The results showed the kernel water content decreased with time as hainan ＞gansu＞liaoning. The mean dehydration rate is Hainan(1.31) ＞gansu(0.69)＞liaoning(0.53) and the mean filling rate is Hainan(1.0)gansu(0.55)liaoning(0.37).The vigor index is positive correlation with the active accumulated temperature apparently in producing area；The effective accumulated temperature is positively correlated with the three vigor index ；Rainfall is significantly negative correlation, with the standard germination and cold test，whereas it is not significant with the accelerated aging test. Sunshine time have significant positive correlation with standard germination rate and accelerated aging test, on the contrary，it is not significant with cold test. In conclusion,the suitable harvest period for high vigor seed of liaodan 588 is 53 days after pollination in the Liaoning province, 56 days after pollination in Gansu province,and 47 days after pollination in Hainan Province.
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