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采用多项式回归分析法，分析了浅山旱地春小麦肥密试验，建立了产量与施肥量和密度二因子的二元二次回归方程。结果表明，在浅山旱地条件下，密度效应大于肥量效应，期望最高产量的密度为每亩基本苗３５．５万株，在施肥量２．７－１７．５ｋｇ／ｍｕ范围内，产量与施肥量呈正相关，最佳施肥量为１５ｋｇ／ｍｕ。
Polynomial regression analysis was used to analyze the fertility and density of spring wheat in shallow dry land. The binary regression equation of two factors of yield, fertilizer amount and density was established. The results showed that under the condition of shallow mountain and dry land, the density effect was greater than the effect of the amount of fertilizer. The density of the highest yield was expected to be 355,000 seedlings per acre. Within the range of 2.7-17.5kg / mu, the yield and fertilization The amount of positive correlation, the optimum amount of fertilizer 15kg / mu.