淮河流域双季稻气候适宜度及其变化趋势

选取淮河流域33个县市1961-2005年的逐日气象数据,运用模糊数学和空间插值方法,对淮河流域双季稻的温度、降水、日照和气候适宜度进行了研究.结果表明:温度和降水是淮河流域双季稻生长的关键气候因子,早、晚稻各气候因子适宜度地域差异明显;其中,早稻气候适宜度由中部平原向东部沿海和西部山区递减,晚稻气候适宜度由南向北递减;温度适宜度以0.01(10a)~(-1)的速率上升,说明温度对淮河流域水稻生长发育产生正效应;日照适宜度以>0.02(10a)~(-1)的速率下降,总的气候适宜度呈下降趋势.

Abstract：

Based on the 1961-2005 meteorological data from thirty three stations in Huaihe River basin, and by using fuzzy mathematics and spatial interpolation methods, the climate suitability of double-cropping rice in this basin were studied. Temperature and precipitation were the key climate factors affecting the growth of double-cropping rice, and the climate suitability of both early-and late rice had strong regional characters. The climate suitability of early rice decreased from central plain area to east coast and west mountain area, whereas that of late rice decreased from south area to north area. Temperature suitability increased at a rate of 0. 01 (10a)~(-1), sug-gesting that temperature had positive effects on the growth and development of double-cropping rice in Huaihe River Basin. Sunlight suitability decreased at a rate higher than 0. 02 (10a)~(-1).The overall climate suitability had a decreasing trend.

Climate suitability and its change trend of double-cropping rice in Huaihe River Basin

Based on the 1961-2005 meteorological data from thirty three stations in Huaihe River basin, and by using fuzzy mathematics and spatial interpolation methods, the climate suitability of double-cropping rice in this basin were studied. Temperature and precipitation were the key climate factors affecting the growth of double-cropping rice, and the climate suitability of both early-and late rice had strong regional characters. The climate suitability of early rice decreased from central plain area to east coast and west mountain area, whereas that of late rice decreased from south area to north area. Temperature suitability increased at a rate of 0. 01 (10a)~(-1), sug-gesting that temperature had positive effects on the growth and development of double-cropping rice in Huaihe River Basin. Sunlight suitability decreased at a rate higher than 0. 02 (10a)~(-1).The overall climate suitability had a decreasing trend.