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利用“多因素联合试验的正交设计”在大范围内筛选优良栽培组合,试验结果直现性强,适用性广。试验选用9(3~4)联合试验表中的六个正交表,确定四个因素,三个水平。各试验单位分别进行结果分析和选优。计算产量院整值,在同一尺度上时六个试验单位的54个小区产量进行直接比较,选出最优组合为 A_sB_1C_1D_2,即品种冀豆4号,种植密度2万株/亩,底肥施P_2O_58公斤/亩,初花期追纯 N4公斤/亩,比其他组合增产11.3%～101.8%,因素效应顺序为 C>B>A>D,即 P_2O_5>密度>品种>追 N。
By using “orthogonal design of multi-factor joint test”, the excellent combination of cultivation was screened in a wide range. The test results were straightforward and applicability was wide. Test using 9 (3 ~ 4) joint test table six orthogonal table, to determine the four factors, three levels. The test units were the results of analysis and selection. Calculate the full value of production yard, compare the yields of 54 plots of six test units directly on the same scale, and select the optimal combination A_sB_1C_1D_2, ie the variety Jidou 4, the planting density of 20,000 trees / mu, the base fertilizer of P_2O_58 Kg / mu. The initial flowering period was followed by a recovery of N4 kg / mu and a yield increase of 11.3% -101.8% over other combinations. The order of the effect factors was C> B> A> D, that is, P2O5> density> variety>