Abstract:

In order to study comprehensive effect of sowing dates, plant densities, nitrogenous fertilizer, phosphorus fertilizer, potassium on quality parameters of high grade hybrid rape. Experiment materials were ‘Youyan 599’ and ‘Sanbei 98’, studied the effects of cultivation factors on quality parameters of high grade hybrid rape were carried out through orthogonal rotational regression combination design in Brassica napus L. The results showed that, there were negative correlations between erucic acid and nitrogenous fertilizer, sowing dates, positively correlated with plant densities. There were negative correlations between glucosinolate and sowing dates, positively correlated with potassium. There were negative correlations between oil content and sowing dates, nitrogenous fertilizer, positively correlated with plant densities, potassium. There were positively correlations between protein and sowing dates, nitrogenous fertilizer, negative correlations with plant densities and potassium. There were negative correlations between oleic acid and phosphorus fertilizer, positively correlations with nitrogenous fertilizer. There were negative correlations between palmitic acid and potassium, negative correlations with sowing dates, plant densities, nitrogenous fertilizer, phosphorus fertilizer in ‘Youyan 599’, positively correlations with sowing dates, plant densities, nitrogenous fertilizer, phosphorus fertilizer in ‘Sanbei98’. There were positively correlations linolenic acid and sowing dates, nitrogenous fertilizer, negative correlations with potassium. There were positively correlations linolenic acid and nitrogenous fertilizer, potassium. There were negative correlations between eicosenoic acid and sowing dates. There were positively correlations and negative correlations among cultivation factor and quality parameters influence of each cultivation factor on quality parameters, positively correlations and negative correlations could be counteract each other. Expression of quality parameter for each treat was comprehensive influence of five cultivation factors on quality parameter. In 50 pairs of simple, there was correlation of five cultivation factors and ten quality parameters. 26 pairs of simple correlation were identity in two varieties, 24 pairs of simple correlation was not. It was bigger for effect of sowing dates, plant densities, nitrogenous fertilizer, phosphorus fertilizer on erucic acid of two varieties, it was smaller for effect of sowing dates, plant densities, nitrogenous fertilizer, potassium on palmitic acid of two varieties, comprehensive influence of five cultivation factors could not improvement quality of high grade hybrid rape essentially.