一、湘南油菜发展潜力大 湘南(指零陵、郴州两地区,下同)地处中亚热带到南亚热带的过渡区域,热量丰富,无霜期长,为一年两熟或三熟提供了优越条件。在油菜生育期间,自10月至翌年5月上旬的累计积温为2726℃,其中 3 ℃的有效积温为2200℃左右,分别高于湘油5号全生育期间2443℃的 First, Shonan rape has great potential for development Shonan (referring to both Lingling and Chenzhou, the same below) is located in the transitional zone from the Central Asia subtropics to the South Subtropics. It is rich in heat and has a long frost-free period and provides favorable conditions for two crops or three crops a year. During the rapeseed growth period, the accumulative accumulated temperature was 2726 ℃ from October to early May next year, of which the effective accumulated temperature at 3 ℃ was about 2200 ℃, which was higher than 2443 ℃ during the whole growth period of Xiangyou 5