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选影响水稻-二化螟系统产量输出的主要环境要素:氮肥、磷肥、栽插密度、二化螟卵量和幼虫入侵时的叶龄,设计5因子5水平的二次正交旋转组合设计试验。建立了各要素与产量关系的数学模型:Y_Y=0.853-6.77x_1-4.47x_3-13.15x_4+5.92x_1x_3-11.36x_2x_4-5.85x_1~2-3.76x_3~2-4.29x_4~2±0.005;虫口主效应对产量损失的预测模型:Y_L=-13.15x_4-11.36x_2x_4-4.29x_4~2。通过对数学模型的分析得出在中等肥力田块,1m~2施纯氮3.75—7.5g和过磷酸钙75g作底肥,每丛插中苗2株,1m~2有4.05—8.1个卵时能得到0.825kg/m~2以上的高产。也建立了各因素与亩穗数的数学模型,并进行了分析讨论。
The main environmental factors influencing the output of rice stem borer (Sesamia inferens): nitrogen fertilizer, phosphate fertilizer, transplanting density, the amount of eggs of rice stem borer and the leaf age of larvae were designed. The quadratic orthogonal rotation combination design experiment of 5 factors and 5 levels . The mathematical model of the relationship between each factor and yield was established: Y_Y = 0.853-6.77x_1-4.47x_3-13.15x_4 + 5.92x_1x_3-11.36x_2x_4-5.85x_1 ~ 2-3.76x_3 ~ 2-4.29x_4 ~ 2 ± 0.005; main effect of insect population The yield loss prediction model: Y_L = -13.15x_4-11.36x_2x_4-4.29x_4 ~ 2. Through the analysis of mathematical model, it was found that in medium fertility plots, 1m ~ 2 application of pure nitrogen 3.75-7.5g and superphosphate 75g as the base fertilizer, inserted in each bundle of 2 seedlings, 1m ~ 2 have 4.05-8.1 eggs Can get 0.825kg / m ~ 2 or more high yield. The mathematical model of each factor and acreage was also established and analyzed and discussed.