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１９８６～１９８７年度在洛川旱塬进行了田间油菜施肥技术试验，建立了旱塬油菜的氮磷和有机肥施肥模式。研究结果表明：洛川旱塬油菜生长和产量形成要求以Ｎ肥为主，肥效反应次序是Ｎ肥＞有机肥＞磷肥。提出低肥力和较高肥力条件下油菜产量１００～１５０ｋｇ／亩的Ｎ，Ｐ和有机肥施用量及配合比例，并分析了各因素的影响及交互作用。较低肥力地最佳施肥水平：Ｎ肥为１２．５０～１３．０６ｋｇＮ／亩，田肥５．８８～８．５５ｋｇＰ＿２Ｏ＿５／亩，有机肥为０．５８～０．６８万ｋｇ／亩；较高肥力地最佳施肥水平：Ｎ肥３．３６～４．２１ｋｇＮ／亩，Ｐ肥为５．４８～６．８５ｋｇＰ＿２Ｏ＿５／亩，有机肥为０．２６～０．３３万ｋｇ／亩。
In 1986 ~ 1987 in Luochuan dryland field rape fertilization technology trials to establish a dry-up rape N, P and organic manure fertilization mode. The results showed that N fertilizer was the main factor for the growth and yield formation of rapeseed in Luochuan upland. The order of fertilizer effect was N fertilizer> organic fertilizer> P fertilizer. The application rate and proportion of N, P and organic manure with rapeseed yield 100 ~ 150kg / acre under low fertility and high fertility were put forward, and the influence and interaction of each factor were analyzed. The best fertilization level with lower fertility was 12.50 ~ 13.06kgN / mu for fertilizer N, 5.88 ~ 8.55kgP_2O_5 / mu for field fertilizer and 0.58 ~ 0.68kg / mu for organic fertilizer. The best fertilization level of high fertility: N fertilizer 3.36 ~ 4.21kgN / mu, P fertilizer 5.48 ~ 6.85kgP_2O_5 / acre, organic fertilizer 0.26 ~ 0.33 kg / acre.