论文部分内容阅读
通过19个品种在全国13个点的多播期试验,分析了稻米垩白形成的气象生态基础及我国稻区不同稻作制下水稻气象垩白的分异情况。结果表明,水稻齐穗后15d内的温度状况是稻米垩白形成的主导因子;且自北而南,稻米气象垩白随水稻齐穗后15d内均温的变化由小倒大,气象垩白<5％的稻区为四川盆地以北、淮河以北及云贵高原地区,5％～10％的稻区为四川盆地、滇南及淮南至沿江江南地区,10％～20％(只为双季稻的早稻)的稻区为云贵高原以东长江以南地区。
Through the experiment of 19 varieties in 13 sowing times in China, the meteorological and ecological basis of rice chalky formation and the differentiation of meteorological chalky rice under different rice planting systems were analyzed. The results showed that the temperature within 15 days after heading of rice was the dominant factor in the formation of chalky rice. From the north to the south, the change of meteorological chalky rice from 15 to 100 days after rice panicle initiation varied from small to large, <5% of the rice area is north of Sichuan Basin, north of Huaihe River and Yunnan-Guizhou Plateau. 5% ~ 10% of the rice area is from Sichuan Basin, Southern Yunnan and Huainan to Jiangnan along the Yangtze River. 10% ~ 20% The early rice of the season rice) is the area south of the Yangtze River to the east of the Yunnan-Guizhou Plateau.