| The quatemionic quadratic orthogonal design method is used in this experiment.The influences of Polygonatum sibiricum Red.density,corn density,the capacity of fertilizer and paclobutrazol which are main cultivation measures on Polygonatum sibiricum Red.yield,corn yield and the portfolio value have been syudied under the condition of intercropping corn with Polygonatum sibiricum Red..The mathematica models among Polygonatum sibiricum Red.yield,corn yield and the portfolio value with the four facters have been built,and have been analyzed,analyzed The relationship among agronomic indicators with Polygonatum sibiricum Red.and corn yield;and studied on a series of synthesis beneficial index about different Polygonatum sibiricum Red.harvest period.Thus The suitable comprehensive cultivation measures of intercropping Polygonatum sibiricum Red.with corn have been putforword,the Polygonatum sibiricum Red.harvest date which has better comprehensive efficiency has been sellected,the result showed:(1) The comprenhensive technological programme of Polygonatum sibiricum Red.which has high yield under the condition of intercropping Polygonatum sibiricum Red.with corn are: Polygonatum sibiricum Red.planting density is from 2500 plants/667m2 to 2600 plants/667m2, corn density is from 3450 plants/667m2 to 3550 plants/667m2,fertilizer capacity is from 78.9 kg/667m2 to 81.8 kg/667m2,paclobutrazol capacity is from 0.239 kg/m2 to 0.262 kg/m2.(2) The comprenhensive technological programme of corn which has high yield under the condition of intercropping Polygonatum with corn are:Polygonatum sibiricum Red.planting density is from 2720 plants/667m2 to 2880 plants/667m2,corn density is from 3510 plants/ 667m2 to 4050 plants/667m2,fertilizer capacity is from 85.35 kg/667m2 to 89.24 kg/667m2, paclobutrazol capacity is from 0.357 kg/m2 to 0.378 kg/m2.(3) The comprenhensive technological programme whose portfolio value reach 10000Yuan/ 667m2 under the condition of intercropping Polygonatum sibiricum Red.with corn are: Polygonatum sibiricum Red.planting density is from 2032 plants/667m2 to 2200 plants/667m2, corn density is from 2872 plants/667m2 to 3187 plants/667m2,fertilizer capacity is from 87.3 kg/667m2 to 96.8 kg/667m2,paclobutrazol capacity is from 0.14 kg/m2 to 0.17 kg/m2.(4) The path analysis between Polygonatum sibiricum Red.yield per plant and related agronomic traits showed that:The order of the agronomic traits which have notable influence on Polygonatum yield is:shoot fresh weight＞maximum number of leaf＞flower number＞height.(5) The correlation analysis between corn yield and related agronomic traits showed that:the correlation between corn yield and related agronomic traits are:height(X1) is 0.7272,ear position(X2) i,s 0.7706,ear length(X3) is 0.7584,ear diameter(X4) is 0.795,ear row number(X5) is 0.7443.Relational sequence is X4＞X2＞X3＞X5＞X1.(6) the principal component analysis of the indicaters of Polygonatum sibiricum Red.in different harvest period and corn showed that the cumulative contribution rate of the first three principal components has reached 91.14 percent,so that the first three principal components almost contain the total information of the original 10 indicators.According to the result of comprehensive evaluation function,20 harvest dates are given score,in accordance with the distribution points,the 20 harvesting period surveyed comprehensive benefits is divided into three types:fine,medium,general. |
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