油菜适期追肥,是实现高产、稳产、低成本的重要措施。为了进一步探索高产油菜适宜的施肥时期,于1980～1983年作了高产油菜追施氮肥时期试验。现将试验结果报告如下。一、经过与方法试验地分别设在农科所豆村基地、黄甫万阳科研室和太白乡农科站,前茬均为小麦休闲地。土壤养分:碱解氮51.6ppm、速效磷6.2ppm,有机质1.02％(本所豆村基地试验数据)。底肥1981年亩施油渣和过磷酸钙各100斤,其他两年分别亩施土粪1.5万斤,过磷酸 Appropriate rapeseed top dressing, is to achieve high yield, stable yield, low cost important measures. In order to further explore the suitable fertilization period of high-yielding rapeseed, the high-yield rapeseed topdressing nitrogen fertilizer period experiment was made from 1980 to 1983. The test results are reported below. First, after the method and experiment were located in the base of the Institute of Peasants, Huang Fu Wan Yang and Taibai agricultural research station, the former crop are wheat fallow. Soil nutrients: 51.6ppm of alkaline nitrogen, available phosphorus 6.2ppm, organic matter 1.02% (based on the test of this village beans base data). Base fertilizer In 1981 acres of oil residue and superphosphate 100 pounds each, the other two years were 15,000 kg of soil manure Shi, superphosphate