Studies On The Effect Of Cultivation Factors On The Oil-content Of Rape

The oil-content variation is smaller than the variation of oil-seedyield in the rape-productivity. So, it is more economic and obvious tochoose high oil-content cultivar species and adoption a forerunnercultivate technique to raise seed oil-content than raising seed yield tosome extent. The Quadratic-Orthogonal-Rotation-Combination is used to analysis the effect of Nitrogen, Phosphate,Kainite, Sulphur, Lemon acid and BR in this study. In the single factoranalyzes, It shows a negative related line to Nitrogen dosage andoil-content. The relation of Phosphate dosage and oil-content is curverelated. To some extent, the using of Phosphate will raise the oil-contentof rape, but it will be lower if Phosphate is too much. The Kainite dosageand oil-content is curve related. The relation of Sulphur dosage andoil-content is related to the experiment place. The oil-content is higherwhen the Nitrogen dosage at low level, the Phosphate dosage at middle level,the Kainite dosage at middle level in this condition. At the firstexperiment, when the Nitrogen valid content is 0kg/hm~2, the Phosphatevalid content is 112.5 kg/hm~2, the Kainite valid content is 112.5 kg/hm~2,the Sulphur valid content is 60 kg/hm~2, we can acquire the highestoil-content 45.87%. At the second experiment, when the nitrogen validcontent is 0kg/hm~2, the Phosphate valid content is 112.5 kg/hm~2, theKainite valid content is 112.5 kg/hm~2, we can acquire the highestoil-content 44.08%. BR and lemon acid didn't show significant effect,probably they are related to the using period and the dosage. The oleicacid content increases constantly with the times go on. The linoleic acid content will reach the max value at around 22 days after flower, then itdecrease slowly. The linolenic acid content will be at the lowest levelin 15d after flower, and then it will reach the highest level at the 22dafter flower. But it will reach a low level since 30d after flower, andthe change is small. The activities of phosphatidate phosphatase andgluose-6-phosphate dehydrogenase are at a low level in former time, a highpeak appears in the metaphase, and then it will descend gradually. Theactivities of the two enzymes show a positive curve relation with theoil-content, and the relativity is significant.