不同玉米品种产量潜力的比较研究

目的]比较登海605、郑单958、浚单20共3个玉米品种的产量潜力。方法]以登海605、郑单958、浚单20为试验材料,探讨不同玉米品种产量潜力,并同时研究3个玉米品种的千粒重、穗数以及穗粒数的变化。结果]3个玉米品种的生育期、日照时数及积温表现一致,从大到小依次为登海605、郑单958、浚单20。3个玉米品种的叶面积系数、光合生产率及灌浆速率随生育期的推进呈先升高后降低,从大到小依次为登海605、郑单958、浚单20。3个玉米品种的产量、穗数及穗粒数从大到小依次为登海605、郑单958、浚单20。3个玉米品种的千粒重从大到小依次为浚单20、郑单958、登海605。结论]在黄淮海现有的生态条件下,比较适宜种植的玉米品种是登海605及郑单958。

Comparison of Yield Potential among Different Maize Varieties

Objective] To compare the yield potential among different maize varieties of Jundan 20, Zhengdan 958 and Denghai 605.Method] With Jundan 20, Zhengdan 958 and Denghai 605 as test materials, the yield potential were discussed.And the changes of 1000-grain weight, ear number and seeds per ear of three maize variety were discussed.Result] The growth period, sunshine duration and accumulated temperature of three maize varieties from big to small were in the order of Denghai 605, Zhengdan 958, Jundan 20.The? leaf area index, photosythetic production rate and grain filling rate firstly enhanced and then reduced as the growth satge prolonged .The values of three maize varieties from big to small were in the order of Denghai 605, Zhengdan 958 and Jundan 20.The yield, ear number and seeds per ear of three maize varieties from big to small were in the order of Denghai 605, Zhengdan 958 and Jundan 20.The 1000-grain weight of three varieties from big to small were in the order of Jundan 20, Zhengdan 958 and Denghai 605.Conclusion] Under the current ecological condition of Huang-Huai-Hai, the proper maize varieties were Denghai 605 and Zhengdan 958.