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Analysis of Relationship between Soybean Relative Maturity Group, Crop Heat Units and >= 10 degrees C Active Accumulated Temperature

文献类型： 外文期刊

作者： Wen, Huiwen 1 ; Wu, Tingting 1 ; Jia, Hongchang 2 ; Song, Wenwen 1 ; Xu, Cailong 1 ; Han, Tianfu 1 ; Sun, Shi 1 ; Wu, Cunxiang 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Crop Sci, Beijing 100081, Peoples R China

2.Heilongjiang Acad Agr Sci, Heihe Branch, Heihe 164300, Heilongjiang, Peoples R China

关键词： >= 10 degrees C active accumulated temperature (>= 10 degrees C AAT); maturity group; crop heat units (CHU)

期刊名称：AGRONOMY-BASEL （ 影响因子：3.949； 五年影响因子：4.117 ）

ISSN：

年卷期： 2022 年 12 卷 6 期

页码：

收录情况： SCI

摘要： Crop heat units (CHU) and >= 10 degrees C active accumulated temperature (>= 10 degrees C AAT) are important indexes to quantify the effects of temperature on soybean development. The relative maturity group (RMG) is widely used in the classification of different soybean varieties. However, CHU and >= 10 degrees C AAT (AAT) were applied in Canada and northeastern China, respectively, and the relationships among CHU, AAT and RMG are poorly documented. The objective of this study is to analyze the conversion function among CHU, AAT and RMG based on two datasets. The first dataset was obtained to analyze the relationship between RMG and AAT in 395 varieties in Northeast China. The second dataset was obtained to calculate the relationship between CHU and AAT at 95 weather stations based on 30-year climatic data (1990-2019). The results showed that both relationships were significantly and positively correlated, and the R-square of these relationships were 0.90 and 0.98, respectively. The distribution of CHU or AAT in the Northeast is proposed. These results can be extensively used for predicting the CHU or AAT of soybean cultivars given the known RMG, thus determining the adaptation zone as well as the growth stage of agricultural practices and responses to heat accumulation. The conclusion of the current study is expected to be widely adopted by soybean regionalization and germplasm exchanges throughout the world.

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