丽江县位于滇西北高原,县城附近的坝子海拔2400公尺,年均温12.6℃,属我国水稻种植海拔较高的高寒稻作区。整个水稻生育期间的自然积温平均仅3443.3℃。坝区一万多亩水稻历来单产仅100～200斤,不少面积收成不足百斤,解放以来,外引品种上千个,都难于在丽江坝“安家落户”,目前大面积上种植的水稻品种仍为历史留下来的老品种～新团黑谷。鉴于丽江特有的自然条 Lijiang County is located in the plateau northwestern Yunnan, Bazi near the county town at an altitude of 2,400 meters, an average annual temperature of 12.6 degrees Celsius, is China’s rice cultivation altitude alpine rice area. The average accumulated temperature during rice growth averaged only 3443.3 ℃. Since the liberation, the introduction of thousands of species, are difficult to Lijiang dam “settled in the home,” the current large area of ​​rice varieties planted on the Still the history of the old varieties left ~ New Valley Black Valley. Given the unique nature of Lijiang