摘要
[目的]分析长江中下游水稻生育期内日最高温度历史资料，研究该地区水稻遭受高温热害的时空分布规律。[方法]采用Marr小波分析各等级高温热害的时间分布特点，采用ArcGIS9.2绘制各等级高温热害地域分布特点。[结果]小波分析高温热害的时间分布后，发现在大于16年时间尺度上，各等级高温热害均处于偏多期，在8年时间尺度上，45年内呈现偏多-偏少-偏多的周期变化，在4年时间尺度上1971年之前及2000年之后处于高发时段，在1971～2000年代处于偏多偏少的动荡期。根据周期分析认为，2005年后的6-8年各等级高温热害仍将偏多发生；地域分析认为，长江中下游各地均有程度不同的高温热害发生，但各地之间发生等级及各等级发生频率存在较大差异。受高温热害影响较小的为江苏全省及安徽省的局部地区，这些区域高温热害发生程度低，频率也低；受高温热害影响最大的是江西及浙江南部的部分地区，这些地区高温热害具有程度高，频率也高的双高特点。[结论]该研究结果对宏观把握长江中下游水稻生长遭受高温热害概况及对水稻育种、生产管理、种植结构调整也具有一定的参考价值。
[ Objective ] The laws of spatial and temporal distribution of the high temperature thermal damage to rice in the middle and lower reaches of the Yangtze River was studied through the analysis of the historical information on the maximum day temperature during the period of rice growth. [ Method] The distribution characteristics of the high temperature thermal damage to rice at different levels was analyzed with Marr Wavelet Method and mapped with ArcGIS 9.2 [ Results] It was found that on the scale of over 16 years, there were many more periods of high-temperature thermal damage to rice at different levels. On the scale of 8 years, the variation cycle of it was showed with many-fewmany in the period of 45 years; on the scale of 4 years, the maximum period of it appeared before 1971 and after 2000. From 1971 to 2000, it was in often variation period. It was thought based on the analysis of its cycle that in the 6 - 8 years after 2005, the high-temperature thermal damage to rice would often happen and based on the geographical analysis that the high-temperature thermal damage to rice would happen in the middle and lower reaches of the Yangtze River in varying degrees, but its level among regions and the frequency among levels were with a big difference. Subjected to less high-temperature thermal damage to rice was the whole Jiangsu and partial areas of Anhui province with low happening frequency. Subjected to the biggest victim was the Jiangxi and southern parts of Zhejiang province with both high damaging degree and high happening frequency. [ Conclusion ] The results was with the reference value for the macro-understanding of the high-temperature thermal damage to rice, rice breeding and production, and the adjustment of plantation structure in the middle and lower reaches of the Yangtze River.
出处
《安徽农业科学》
CAS
北大核心
2009年第14期6454-6457,共4页
Journal of Anhui Agricultural Sciences
基金
科技部十一五科技支撑项目(2006BAD04B09)
