Mathematical Model And Optimization Scheme Sieving Of Comprehensive Cultural Measure For High-Yield And High-Quality Of Rape

The trial was conducted on the base of other studies. By using the combination design of orthogonal pivoting and quadratic regression equations. Four factors selected in the experiment were the varieties Cultivars, planting densities, sowing dates and nitrogen. Which were the main factors influencing rape yield and quality. The cultural mathematical model was set up by computer. The relations between rape yield and quality and the cultural measure were analyzed by computer. The following conclusion were thus obtained.1 Rape oil content, glucosinolate content, erucic acid content, oleic acid content and linoleic acid content of varieties Cultivars is significant, rape yield, oil content of different planting densities is significant, rape yield of different sowing dates is significant; rape yield, oil content, oleic acid content, linoleic acid content and linolenic acid content of different nitrogen is significant; interactions between planting densities and nitrogen to rape yield is significant, interactions between sowing dates and nitrogen to rape yield is significant.2 In the paper the effect of rape yield, oil content, glucosinolate content, erucic content, oleic content, linoleic content, linolenic content, with four factors have been analyzed. The effect on yield is nitrogen (X4)> sowing dates(X3) > Cultivars (X1)> planting densities (X2). The effect on oil content is (X1)>(X3)> (X2) >(X4).The effect on glucosinolate content is (X1)>(X2)>(X3)>(X4). The effect on erucic acid content is (X1) >(X4)>(X3)>(X2). The effect on oleic acid content is (X1)>(X4)>(X3)>(X2). The effect on is linoleic acid content (X1)>(X4)>(X2)>(X3). The effect on linolenic acidcontent is (X4)>(X1)> (X2) >(X3).3 The optimum cultivate scheme of rape yield =5200kg/666.7m2, oil content≤40%, glucosinolate content<30umol/g, erucic acid content<1% is breed ZhongShuang 6 hao, 9901,HuaShuang 3 hao and HuaZa 4 hao. planting densities 1.1-1.3 ten thousands /666.7m2, sowing dates the end of September to the start of October, N fertilizer 9.00kg/666.7m2 (pure nitrogen).