早熟玉米品种衡早10号灌浆速率特性研究

Study on Grain Filling Characteristics of Early Maturing Variety Hengzao No.10

为了明确不同熟期玉米的籽粒灌浆特性,选用熟期不同的2个玉米品种衡早10号(早熟型品种)和郑单958(晚熟型品种)为试验材料,采用相同的栽培条件,在其吐丝授粉后第7 d开始取籽粒样品,每7 d取1次,直至种子成熟,分析了玉米籽粒干重、含水量、含水率、体积和灌浆速率的变化,以及籽粒体积与水分之间的相关关系。结果表明:衡早10号具有干重积累速度快、籽粒体积大、前期灌浆速率快且强度大等特点,收获时籽粒含水率低,且产量明显高于郑单958,增产率为8.4%。

In order to define the different maturities of corn grain filling characteristics. Different maturi-ties maize hybrid Hengzao No.10 （early maturity variety） and Zhengdan 958 （late maturity variety） were used as the materials, using the same cultivation conditions, after pollination 7 d begins to take grain samples, every 7 d take 1 time, until the seed mature, analyzed its grain dry weight, water content, grain water percentage,grain volume the change of volume and filling rate,and the relationship between grain size and water. The main results showed that in comparison with the maize hybrid Zhengdan 958, Hengzao No.10 had some characters,such as faster grain development,bigger seed volume,higher grain filling rate in early growth stage and with high strength. Yield of the hybrid maize Hengzao No.10 was higher and the yield increasing was 8.4%.