【摘要】 气候变化背景下我国玉米种植界限北移且气象灾害频发。为给内蒙古武川地区在合理调整品种布局和优化利用农业气候资源上提供科学参考,本研究利用武川地区1961-2018年逐日气象观测数据,对该地区春玉米生长季水热资源和安全播期变化特征进行分析。研究结果表明:武川地区稳定通过10℃的持续日数为99～156d,≥10℃的活动积温值为2051.4℃·d,并以66.0℃·d·（10a）^-1的速率显著增加,5、9月活动积温稳定性较差。春玉米始播期显著提前、最迟播期显著推迟,各年代可播种成熟的年份数增加。全生长季降水量为299.8mm,5月降水量年际波动较大,8月降水量显著减少。玉米全生长季中旱灾达到"十年七旱",8月干旱灾害不断加重。更多还原

【Abstract】 Under the background of climate change, China’s corn planting boundaries have moved northward and meteorological disasters have occurred move frequently.In order to provide a scientific reference for rationally adjusting the variety layout and optimizing the utilization of agricultural climate resources in Wuchuan, Inner Mongolia, this study used the daily meteorological observation data of 1961-2018 in Wuchuan area to research the variation characteristics of hydrothermal resources and safe sowing date of the spring maize growing season.The results show that the stable duration at 10 ℃ in Wuchuan area is between 99 and 156 days, and the active accumulated temperature(≥ 10 ℃) is2051.4℃ ·d, which increases significantly at the rate of 66.0℃ ·d·(10 a)-1; the stability of active accumulated temperature in May and September is not ideal.The initial sowing date of spring maize is significantly advanced while the latest sowing date is significantly delayed, and the number of years in which sowing maturity in each decade increases. The precipitation in the whole growing season is 299.8 mm. The precipitation in May fluctuates greatly, and the precipitation in August decreases significantly. The drought disaster in the whole growing season of maize has reached "seven droughts in ten years", and the drought disaster has been aggravated continuously in August.更多还原