摘要
Abstract
Based on the surface observation temperature and precipitation data of 28 national meteorological stations in the eastern agricultural area of Inner Mongolia during the crop growth season(May-September)from 1981 to 2020,the national standard climate annual assessment method issued in 2017 was adopted,and the change characteristics of annual climate index and its relationship with high and low grain yield were analyzed,the feasibility of assessing grain yield through annual climatic status evaluation was determined.The results showed that the tem-perature in eastern Inner Mongolia showed an increasing trend from 1981 to 2020,there was an abrupt change of temperature in 1996.The pre-cipitation in the growing season of crops showed a slow decreasing trend,there were two mutations in 1998 and 2011.There was no significant negative correlation between the grain yield and the annual temperature index,the correlation coefficient was-0.262,and the correlation coef-ficients with the annual precipitation index and the annual climate index were-0.415 and-0.428,respectively,which were significantly nega-tively correlated.Based on the comprehensive analysis of the consistency between the annual climate grade and the grain yield,the average ac-curacy was 70%.Therefore,it was scientific to predict the grain yield by using the grade of annual climatic status.关键词
气候年景指数/气候年景等级/变化特征/粮食产量/相关关系/内蒙古东部Key words
Annual climate index/Grade of annual climatic status/Change characteristic/Grain yield/Relationship/Eastern Inner Mongolia分类
农业科技
