摘要
为了研究气候变暖背景下0℃界限温度的变化特征,分析陕西宝鸡市1961—2010年日平均气温稳定通过0℃的初日、终日、间隔日数及其积温、降水量的变化特征。结果表明:陕西宝鸡市日平均气温≥0℃的初日呈显著提早趋势,终日呈波动推迟趋势。初终日之间间隔日数显著增加。≥0℃期间的积温以73.86℃·a/10 a显著增加,降水量以13.706 mm/10 a缓慢减少。积温年代际波动增加,冷暖交替频繁。气候变化影响冬小麦种植品种特性转变,适宜播种期推迟,主要发育期提前,有效生长期明显延长,对提高作物产量有重要意义。
In order to study under the background of climate warming, 0℃ temperature variation characteristics, analyze Baoji City in Shaanxi Province from 1961 to 2010, the average temperature stability by 0℃ at the beginning of the day, all day long, interval number and its change characteristics of accumulated temperature, precipitation. The results showed that： Baoji Shaanxi, the average temperature of 0℃ or more significant early trend in the early days, all showed a trend of fluctuations delay. Early all day long interval between days increased significantly. During the acuity 0℃ accumulated temperature of 73.86℃/10 a significantly increased, rainfall 13.706 mm/10 a slow decreased. Accumulated decadal fluctuations increased, frequently alternating cold and warm. Effects of climate change varieties of winter wheat planting characteristics change, appropriate seeding time delayed, main development period, early growth period significantly prolonged, had important significance to improve crop yield.
出处
《中国农学通报》
CSCD
2014年第14期289-293,共5页
Chinese Agricultural Science Bulletin
基金
陕西省气象局科技创新基金项目"宝鸡主要农作物对气候变化的响应研究"(2010M-28)
关键词
≥0℃初(终)日
间隔日数
积温
降水量
分析
≥0℃ at the beginning of （end） date
gap date number
accumulated temperature
precipitation
analysis
