Canopy characteristics of high-yield maize with yield potential of 22.5 Mg ha(-1)

文献类型： 外文期刊

第一作者： Liu, Guangzhou

作者： Liu, Guangzhou;Hou, Peng;Xie, Ruizhi;Ming, Bo;Wang, Keru;Li, Shaokun;Xu, Wenjuan;Liu, Wanmao;Yang, Yunshan

作者机构：

关键词： Maize;Canopy structure;High yield;High density

期刊名称：FIELD CROPS RESEARCH （ 影响因子：5.224； 五年影响因子：6.19 ）

ISSN： 0378-4290

年卷期： 2017 年 213 卷

页码：

收录情况： SCI

摘要： Over three continuous years (2013-2015) of high-yield experiments, maize hybrid DH618 was grown at densities of 12.0 and 13.5 x 10(4) plants ha(-1) at Qitai Farm (89 degrees 34'E, 44 degrees 12'N), Xinjiang, China, and broke the record for the highest yield in China. Therefore, it is considered to have plant characteristics that approach those of the ideotype. In 2014 and 2015, various canopy characteristics were measured. On average, the dry matter gain of hybrid DH618 was 20.0, and 36.5 Mg ha(-1) during post-silking and at maturity, a transfer rate from vegetation organs of 8.7%, and harvest index of 0.54. On average, it had a leaf area index of 7.53 at silking, a leaf area of 3.99 x 10(3) and 1.90 x 10(3) cm(2) above and below the ear, and a spatial density of leaf area of 0.17 and 0.08 cm(2) cm(-3) above and below ear, respectively. The average light transmissions were 3.7% and 1.1% at the ear and bottom respectively, and the attenuation coefficient was 0.63. The plant height and ear height were about 287 and 113 cm. The average leaf orientation values were 51.9 and 49.2 above and below ear, respectively. These results will be of great significance for ideotype breeding programs and maize yield improving.

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