Temporal and spatial variation in accumulated temperature requirements of maize

文献类型： 外文期刊

第一作者： Hou, Peng

作者： Hou, Peng;Liu, Yuee;Xie, Ruizhi;Ming, Bo;Ma, Daling;Li, Shaokun;Liu, Yuee;Mei, Xurong

作者机构：

关键词： ≥10 °C accumulated temperature;GDD;Coefficients of variation;North spring maize region;Huanghuaihai maize region

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

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收录情况： SCI

摘要： Temperature, especially accumulated temperature, is an important environmental factor that plays a fundamental role in agricultural productivity. To examine temporal and spatial variation in accumulated temperature requirements of maize as indicated by >= 10 degrees C accumulated temperature and growing degree days (GDD), we conducted experiments during 2007-2012 at 35 locations in seven provinces in the north spring maize region between 35 degrees 11'N and 48 degrees 08'N and 6 locations in four provinces in the Huanghuaihai maize region between 32 degrees 52' N and 41 degrees 05' N in China. The most widely cultivated maize hybrids of ZD958 and XY335 were used in this study. We found that the coefficients of variation for >= 10 degrees C accumulated temperature and GOD requirements were different during different growth periods, with a descending rank order of sowing to emergence > silking to maturity > emergence to silking > sowing to maturity and greater in the north spring maize region than in the Huanghuaihai maize region. The coefficients of variation were lower for >= 10 degrees C accumulated temperature than GDD requirements for both cultivars in both planting regions. Significant differences existed between locations and years for the >= 10 degrees C accumulated temperature and GOD requirements. These have implications for appropriate maize cultivars recommendation, and high and stable yield achieving by reasonably using accumulated temperature across different regions of China.

分类号： S

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