Abstract:
Climate change characterized by climate warming has had an important impact on soybean production around the world. Based on a comprehensive review of relevant domestic and international literature, this paper systematically summarizes the current methods applied to the study of climate change and soybean production, illustrates the response of soybean phenology and yield to climate change, and proposes adaptive management suggestions. The main conclusions are as follows: 1) The research methods of the impact of climate change on soybean production mainly include field experiment observation, statistical analysis and crop model simulation. The observation method of field experiment is the most intuitive, the statistical analysis method can guarantee the reliability and objectivity of the results, and the model simulation method has strong mechanical rationality and good extrapolation effect. Currently, AI technologies such as machine learning, deep learning and reinforcement learning can be utilized to enhance the accuracy of model simulation. In future research, multiple research methods can be combined to reduce the error of a single method and increase the accuracy of the research on the response and adaptation of soybean production under climate change. 2) The impact of climate change on soybean production mainly stems from the fluctuations and changes in key climatic factors such as temperature, precipitation, radiation and CO
2 concentration. These factors directly affect the entire growth process of soybeans, not only causing changes in the phenological period and yield, but also influencing the quality. At present, the research on the impact of climate change on soybean production mainly focuses on two aspects: changes in the growth period and fluctuations in yield. Due to the regional differences in climate change, the response degree of soybean phenology and yield to climate change worldwide shows significant spatial heterogeneity. Overall, for every 1 ℃ increase in temperature, the entire growth period of soybeans will be shortened by 5.9 days and the yield will decrease by 6.85%. Both precipitation and sunshine duration can shift the phenological period of soybeans. Meanwhile, for every 10 mm decrease in precipitation, the soybean yield will decrease by 2.13%. However, with global warming, the concentration of CO
2 keeps rising. The fertilization effect of CO
2 can to some extent offset the negative impact of climate change on soybean yield. Specifically, for every 10 μmol∙mol
−1 increase in CO
2 concentration, the yield will increase by 0.52%. 3) In terms of adjustment management measures, practices such as variety replacement, sowing date adjustment and technology upgrading should be taken to improve soybean yield potential and make up for the negative impact of climate change. In addition, policy subsidies, agricultural insurance, the application of Internet of Things and artificial intelligence technologies, etc. are also important measures to make up for the damage caused by climate change to soybean production.