辽阳地区春季气候变化与农业生产的关系

利用1956~2008年辽阳地区的地面观测资料和1972~2008年粮食产量资料,对该地区春季的气候变化特点及其与农业生产的关系进行了分析。结果表明,1956~2008年辽阳地区春季气候变化年代和世纪间变化明显,大体可分为20世纪90年代前和20世纪末~21世纪以来2个时段,前1个时段的特点是气候要素年际间变化平稳,后1个时段是气候要素变化幅度剧烈并有逐渐变暖的趋势,主要在3、4月;降水分布也逐年发生改变,从20世纪90年代开始3月降水开始逐渐增多,4月逐年减少;日照时数逐年减少;终霜日期显著提前,无霜期日数、有效积温增多。由于无霜期天数增多,热量充足,可选择晚熟品种增加产量和提高粮食品质。根据辽阳地区气候变化特征,播种期可相应提前,选择晚熟品种增加粮食产量和品质。

The Relationship between Climatic Change in Spring and Agricultural Production in Liaoyang

Using ground observation data in Liaoyang during 1956-2008 and grain output data during 1972-2008,climatic variation characteristics in spring in the region and the relation with agricultural production were analyzed.The results indicated that decades and centuries changes of climatic variation in spring in Liaoyang during 1956-2008 were obvious,and generally divided into pre-1990s and end of 20th century-21st century,the characteristics of the first stage were: inter-annual variation of climatic elements w...