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通过对宁夏平罗县不同农田等级小麦套种玉米基础产量的分析研究。结果表明:1)在3等田施用化肥效益高于2等田,亦高于1等田,这说明在施用化肥方面,要多加重视3等田投入;2)不同等级土壤基础肥力对小麦套种玉米产量的贡献率分别是:1等田为54.7%、2等田为47.2%、3等田为38.7%,各等级田(全部)为47.8%。土壤基础肥力对作物产量的贡献率与土壤基础产量成正比,其回归方程式是x/y=0.0009x+0.1375,相关达到极显著水平,相关系数R=0.8573;3)应用当地小麦套种玉米基础产量值计算出其目标产量为779.9kg/667m2。这对于农业生产具有现实指导意义。
Analysis of Basic Yields of Intercropping Maize with Different Farmland Grades in Pingluo County, Ningxia. The results showed as follows: 1) The efficiency of applying chemical fertilizers in field 3 was higher than that of field 2 and also higher than that in field 1, which suggested that more attention should be paid to the input of field 3 in the application of fertilizers; 2) The contribution rates of maize production are: 54.7% for the first and second fields, 47.2% for the second and third fields, 38.7% for the third and third fields, and 47.8% for all fields (all). The contribution rate of soil basic fertility to crop yield was proportional to soil base yield, and the regression equation was x / y = 0.0009x + 0.1375, the correlation reached a significant level, the correlation coefficient R = 0.8573; 3) The application of local wheat intercropping corn base yield The calculated value of its target output is 779.9kg / 667m2. This has realistic guiding significance for agricultural production.