Ecological Adaptability Analysis of Different Types of Double-cropping Rice Varieties in the Context of Climate Change
Climate change affects the safe and stable production of rice,making it crucial to investigate the ecological adaptability of different double-cropping rice varieties under these changing conditions in order to ensure food security.In this study,different types of double-cropping early and late rice varieties were selected as experimental materials for a two-year experiment conducted at three ecological sites in Lixian,Changsha and Qiyang.The aim was to analyze the reasons for differences in the ecological adaptability of double-cropping rice varieties.The results revealed that year,variety and climate conditions all had significant impacts on the yield of double-cropping rice.Specifically,long-maturity hybrid rice varieties with larger panicles such as Wufengyou 317 and Y Liangyou 911 showed increased yields by 10.1％and 37.9％,respectively,compared to conventional rice varieties Xiangzaoxian 45 and Xiangwanxian 17.Furthermore,Y Liangyou 911 and Wufengyou 317 exhibited superior productivity,stability,and overall performance across different ecological areas.Principal component analysis of meteorological factors and double-cropping rice yield indicated that daily rainfall,temperature resources and sunlight resources were the primary factors influencing double-cropping rice yield.Therefore,in order to adapt to the unique characteristics of climate change in Hunan Province while ensuring safe production practices are maintained,a comprehensive consideration should be given to factors such as matching maturity periods for different double-cropping rice varieties along with regional rainfall patterns and temperature/light resources.
万方数据
维普
