Characteristics of soybean climate potential productivity in frigid region and its response to climate change
A comprehensive understanding of the evolution of soybean climate potential productivity and its response to climate change in Heilongjiang Province can offer reference and basis for further tapping soybean pro-duction potential and realizing stable and high yield of soybean in the frigid region.Based on meteorological data from 80 meteorological stations in Heilongjiang Province from 1961 to 2020,we estimated photosynthesis,light temperature,and climate potential productivity of soybean by the stepwise correction method,examined the spatio-temporal variations by spatial interpolation and statistical analysis methods,and analyzed the impact of changes in climate factors such as radiation,temperature,and precipitation on climate potential productivity.The results showed that during the study period,the average values of photosynthesis potential productivity(YQ),light-temper-ature potential productivity(YT),and climate potential productivity(YW)of soybean in Heilongjiang Province were 7533,6444,and 3515 kg·hm-2,respectively.The temporal changes of those variables showed significant in-creasing trends,with increases of 125.9,182.9,and 116.1 kg·hm-2·(10 a)-1,respectively.For the spatial dis-tribution,YQ,YT,YW were characterized by high values in plains and lower in the mountains,and gradually de-creased from southwest to northeast.Compared with that during 1961-1990,the high value zone of YW in period 1991-2020 expanded by 7.1％,and the low value zone decreased by 5.1％.YW showed a significant response to cli-mate change.The potential temperature growth period was extended due to climate warming.The continuous in-crease in thermal resources,combined with relatively sufficient precipitation,effectively alleviated the negative im-pact of the decline in light resources on soybean production in Heilongjiang Province.The projected"warm and hu-mid"climate would comprehensively boost climate potential productivity of soybean in Heilongjiang Province.
国家科技期刊平台
NSTL
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