夏玉米一喷三防技术的研究

旨在分析黄淮海夏玉米中后期实施一喷三防对其抗逆性、百粒重等农艺性状的影响，本研究以‘郑单958’中后期喷施混合药液作为研究对象，通过方差分析从中筛选出最佳喷药时间。结果表明：所有处理对夏玉米的农艺性状均有显著影响(P＜0.05)。田间性状分析T4、T5、T6处理与T7比较均达到显著水平，T1、T2、T3处理的各性状均有所改善，处理T5综合性状最佳，T7综合性状最差；室内考种分析，除籽粒含水量外，其他性状处理间的差异均达到显著水平，出籽率、百粒重和产量性状的分析结果相近， T5显著优于T7；穗粒数、籽粒蛋白质含量和霉变率性状T7与T5比较均达级显著水平。夏玉米散粉结束后喷洒杀菌剂、杀虫剂和部分微肥的混合药液可以显著改善农艺性状，延长灌浆时间，为粮饲通用玉米栽培、提高玉米产量及品质提供理论依据。

The“One Spray and Three Prevention”Technology of Summer Corn

The purpose of this paper is to analyze the effect of one spray and three prevention on agronomic traits such as stress resistance and 100-grain weight of summer maize in the middle and late stage of Huang - Huai - Hai region. In this study, 'Zhengdan 958' was used as the research object to select the best spraying time through variance analysis. The results showed that all treatments had significant effects on agronomic traits of summer maize (p < 0.05). Analysis of field traits: T4, T5, T6 treatment reached significant level compared with T7, All the traits of T1, T2, T3 treatment improved, T5 treatment was the best and T7 treatment was the worst. In the analysis of indoor seed testing, the differences among other traits except grain water content reached significant levels. The analysis results of seed yield, 100 - grain weight and yield traits were similar and T5 was significantly superior to T7. The grain number per spike, grain protein content and mildew rate traits T7 and T5 all reached significant levels. Spraying the mixture of bactericide、pesticide and some micro-fertilizer after summer maize pollen dispersal can significantly improve agronomic traits and prolong the filling duration, which can provide theoretical basis for general corn cultivation and improvement of corn yield and quality.