【摘要】 目的研究不同生长调节剂对玉米籽粒灌浆特性及粒重的影响。方法以巡天969为材料,采用Richard生长曲线方程对不同生长调节剂作用下玉米籽粒灌浆过程进行拟合,研究籽粒干物质、灌浆速率及粒重的动态变化。结果结果表明:不同生长调节剂处理下,玉米籽粒干重均呈"S"型曲线增长,Richard方程决定系数r均在99.97~99.98之间,达到极显著水平,拟合效果较好;籽粒平均灌浆速率和最大灌浆速率是影响粒重的2个主要因素;灌浆持续期长短是影响不同品种粒重的1个因素。结论生长调节剂玉黄金处理能显著增加籽粒干重,提高灌浆速率,延长灌浆持续时间,改善籽粒灌浆参数,达到增加粒重的目的。更多还原

【Abstract】 Objective To study the effect of different plant growth regulators on the grain filling characteristics and grain weight in maize.Methods Bosed on Xuntian 969 as materials,the grain filling process of maize with different plant growth regulators treatment was imitated by Richard Growth equation to explain the dynamic changes of grain dry matter,grain filling rate and grain weight.Results The results showed that the increment of grain dry matter in maize with the different plant growth regulators treaments presented a "S"curve change.The grain filling process could be extremely well described by Richard model,since the determination coefficints of Richard equation were between 99.97 and 99.98,which achieved a significant level.The average grain filling rate and the biggest grain-filling rate were two main factors to affect the same cultivar grain weight.And duration of high-filling rate of kernel was one main factor to affect the different plant growth regulators.Conclusion YuHuangJin treatments could enhance the final dry matter weight significantly,improve grain filling parameters,and finally enhance the grain weight.更多还原