玉溪是云南油菜主要产区之一。1964年和1965年在春和、葫蘆、高仓等三个公社,作了过磷酸鈣对油菜的肥效示范試驗。两年来試驗証明,一般中等和中下等地力的田地上,在配施氮肥的基础上,增施适量的磷肥,油菜增产效果比較显著,幷深受群众欢迎,結果如下:一、磷肥对油菜的增产效果1964年試驗結果,磷肥对油菜籽粒产量 Yuxi is one of the main producing areas of Yunnan rape. 1964 and 1965 in Chunhe, gourd, Takakura and other communes, made of calcium phosphate on rapeseed fertilizer demonstration test. Tests over the past two years proved that, on average, middle and lower soil fertility fields, with the application of nitrogen fertilizer, the application of appropriate amount of phosphate fertilizer increased the yield of rape more significant, and was deeply welcomed by the masses. The results are as follows: Yield effect 1964 test results, phosphorus fertilizer on rapeseed yield