%0 Journal Article
%A WANG Yong
%A ZHANG Zhen-tao
%A ZHANG Fang-liang
%A GUO Shi-bo
%A YANG Xiao-guang
%T Impact of Climate Change and Varieties Replacement on Maize Yield and Resource Use Efficiency in Xinjiang
%D 2020
%R 10.3969/j.issn.1000-6362.2020.06.001
%J Chinese Journal of Agrometeorology
%P 331-344
%V 41
%N 06
%X Studying the effect of varieties replacement on the heat and radiation resources use efficiency can provide a scientific reference for adapting to climate change.The Wulanwusu spring maize, Hami spring maize, Kashgar summer maize, and Korla summer maize in Xinjiang were selected as the research objects. Based on the meteorology data(1981-2019), maize field trial data(1981-2018) from agro-meteorological experiment stations, and soil data, the adaptability of APSIM-Maize model in the typical sites in Xinjiang was analyzed. The accumulated effective thermal time(AcTT) and accumulated photosynthesis radiation(AcPAR) during vegetative growing period(VGP), reproductive growing period(RGP), and whole growing period(WGP) of Xinjiagn spring maize and summer maize were calculated. Then, the influence of climate change on maize yield and heat/radiation resources use efficiency were analyzed under the scenarios of varieties replacement or notby the validated APSIM-Maize model. The results showed that: (1) the validated APSIM model had better adaptability in spring or summer maize development and yield formation at the typical sites in Xinjiang. (2)The AcTT and AcPAR in the WGP showed an increasing trend, of which spring maize mainly increased in the RGP, and summer maize mainly increased in the VGP. (3)The length of maize growing period was shortened, and yield was reduced by climate change. But the varieties replacement had alleviated these adverse effect and increased yield. Among them, the spring maize showed an extension of growing period, and the proportion of RGP in WGP was increased, while summer maize showed a decrease in the shortening trend of growing period. At the same time, the heat resources and radiation resources use efficiency during maize growing period were also significantly increased by varieties replacement.
%U https://zgnyqx.ieda.org.cn/EN/10.3969/j.issn.1000-6362.2020.06.001