河南农业科学2012，Vol.41Issue(7)：21-26,6.
河南省夏玉米生长季农业气候资源变化分析
Changes of Agricultural Climate Resources in Henan Province during Summer Maize Growing Season
摘要
Abstract
To fully and reasonably use climate resources and assess possible effects of future climate, the interannual change trend and spatial distribution differentiation of light, temperature and precipitation during summer maize season were analyzed using the weather data from 1961 to 2008 of 118 meteorological stations in Henan province. Possible effects of agro-climate resource changes on summer maize production were further discussed. Results showed that light resource reduced from north to south spatially, and presented obviously decreasing trend: the solar radiation and sunshine hour every 10 years decreased by 50. 2 MJ/m2 and 37. 6 h,respectively. Heat resource had a slight improvement, so the sowing date significantly advanced with 2 d earlier and possible growing duration significantly prolonged with 2. 85 d increasing every 10 years, respectively. Suitable growing duration had no obvious variation trend but with increasing annual fluctuations. Accumulated temperature during summer maize season indicated an overall reducing trend during the past 50 years,but an increasing trend was dominated during mid and late 1980s in most areas of Henan province. Spatially, the accumulated temperature significantly decreased in west and southwest areas with a climate tendency of above 20℃ · d every 10 years. Rainfall had large annual fluctuations and showed an increasing trend but not significantly. Overall, light resource decreased, annual fluctuation of heat increased, and spatial and temporal distribution of rainfall was further uneven,which increased the occurrence possibilities of multi-disasters and climate risks of summer maizi jiroduction. Measures such as variety screening,sowing time adjustment and management improving should be taken to avoid disadvantages,to protect the high and stable maize production.关键词
气候资源/夏玉米/气候变化/界限温度Key words
climate resources/summer maize/climate change/critical temperature分类
农业科技引用本文复制引用
李树岩,方文松,马志红..河南省夏玉米生长季农业气候资源变化分析[J].河南农业科学,2012,41(7):21-26,6.基金项目
公益性行业(气象)科研专项(GYHY201006041) （气象）
