摘要
利用江苏12个地区30年(1981—2010年)水稻关键生育期(8月20日至10月10日)的逐日气温数据,计算该生育期阶段冷积温和连续低于20℃的天数,并运用空间分析方法探讨了上述要素的时空变化特征。结果显示,江苏地区水稻的抽穗开花期冷积温较低,整体呈现从北向南升高的趋势。该阶段除了赣榆、盱眙、徐州3个地区冷积温随年份增加外,其余9个地区冷积温都随着年份减少,温度低于20℃的连续天数主要分布在连续3、4 d。江苏地区水稻的灌浆结实期冷积温较高,江苏整个地区呈现从北到南升高的趋势。灌浆结实期12个地区的冷积温都随着年份而减少,温度低于20℃的连续天数主要分布在连续4、5、6 d。各地每年的水稻年产量总体呈上升趋势,年产量最大的是2010年南通9.3×10^(3)kg/hm^(2)。第二个10年(1991—2000年)与第三个10年(2001—2010年)的年平均产量比较高,达7×10^(3)kg/hm^(2)以上。
Using daily temperature data of the key rice growth period(August 20 th to October 10 th)in 12 regions of Jiangsu province for 30 years(1981—2010),the cold accumulated temperature during the growth period and the number of consecutive days below20℃was calculated,and using spatial analysis methods,the temporal and spatial characteristics of the above elements was explored.The results showed,the cold accumulated temperature during heading and flowering stage of rice in Jiangsu area is relatively low,and the overall trend is increasing from north to south.In this stage,except for Ganyu,Xuyi,and Xuzhou,the cold accumulated temperature increased with the year,and the cold accumulated temperature of the other nine areas decreased with the year.The number of consecutive days with a temperature below 20℃was mainly distributed for three consecutive days and 4 consecutive days.The cold accumulated temperature of rice in the filling stage is relatively high in Jiangsu,and the whole area of Jiangsu shows a trend of increasing from north to south.During the grouting period,the cold accumulated temperature of the 12 regions all decreased with the year,and the consecutive days when the temperature was lower than 20℃were mainly distributed in 4 consecutive days,5 d,and 6 d.The annual rice output in various regions is generally on the rise.The largest annual output was 9.3×10^(3)kg/hm^(2)in Nantong in 2010.The average annual output of the second 10 years(1991—2000)and the third 10 years(2001—2010)was relatively high,reaching more than7×10^(3)kg/hm^(2).
作者
裔传祥
周宏伟
黄维
李新新
高雅
YI Chuan-xiang;ZHOU Hong-wei;HUANG Wei;LI Xin-xin;GAO Ya(Yancheng Meteorological Observatory,Yancheng 224005,Jiangsu,China;Liuzhou Agrometeorological Experimental Station,Liuzhou 545003,Guangxi,China)
出处
《湖北农业科学》
2021年第S01期166-170,共5页
Hubei Agricultural Sciences
关键词
水稻
冷积温
气候特征
江苏省
rice
cold accumulated temperature
climatic characteristics
Jiangsu province
