CAJ | 학술논문

依据1972-2006年35a晋中11个县市历年的逐月、旬、侯降水资料,结合不同的气候特征和地理环境,将晋中划分为4个区域.用数理统计方法,分区域分析了干旱及旱灾造成粮食减产的时空分布特征,分组量化研究了4个区域丰产年、歉收年、干旱年、平常年4类不同产量类型年中干旱对玉米产量的影响,分时段分析了干旱对玉米产量的影响以及玉米主生育期内各生育阶段的成旱因素和缓旱因素.结果表明:干旱显著年份,对玉米减产的影响平均为23.5%～42.3%,灾年全市平均减产在1.05～3.5亿kg.对全市性的5个灾年进行计算,玉米减产达10.95亿kg,旱灾损失占到全市各种灾害损失的65%～84%.全市干旱发生频率在加大,干旱烈度在加重,导致玉米减产年份相应增多,减产幅度也呈相对增大趋势.
의거1972-2006년35a진중11개현시력년적축월、순、후강수자료,결합불동적기후특정화지리배경,장진중화분위4개구역.용수리통계방법,분구역분석료간한급한재조성양식감산적시공분포특정,분조양화연구료4개구역봉산년、겸수년、간한년、평상년4류불동산량류형년중간한대옥미산량적영향,분시단분석료간한대옥미산량적영향이급옥미주생육기내각생육계단적성한인소화완한인소.결과표명:간한현저년빈,대옥미감산적영향평균위23.5%～42.3%,재년전시평균감산재1.05～3.5억kg.대전시성적5개재년진행계산,옥미감산체10.95억kg,한재손실점도전시각충재해손실적65%～84%.전시간한발생빈솔재가대,간한열도재가중,도치옥미감산년빈상응증다,감산폭도야정상대증대추세.
Based on the historical precipitation data of eleven counties and cities in Jinzhong from 1972 to 2006 and the different climatic and geographical environment, Jinzhong City was divided into four sub-regions. Using the mathematical statistical method, the spatial and temporal distribution features of the grain reduction in different regions caused by summer drought were analyzed. The influence of the summer drought on maize production in four different kinds of years, such as high yield years, crop failure years, drought years and normal years, was analyzed as well. The reasons of the drought formed and eased in each growing period of maize were discussed. The results showed that in significant drought years, the average influence of the grain reduction was by 23. 5 percent to 42. 3 percent, while in disaster years, the average reduction of the whole Jinzhong City was by 1. 05 ×10~8 kilograms to 3.50 × 10~8 kilograms. In the five disaster years of the whole city, the reduction of maize was to 1. 095 billion kilograms. The drought losses occupied 65 percent to 84 percent in all the city's disaster losses. The frequency of drought was increasing and the intensity of drought was growing, which led to increase of the years of maize yield reduction.