Effect Of Nitrogen And Phosphorus On Yield And Quality Of The Double Low Hybrid Oilseed Rape

Since 1974, the double low oilseed rape was cultivated, it was expanded quicklybecause of its high yield and good quality in nourishment.As a result it got people'sapprobation in short time. In that condition a great deal of fertilizer was used in order to attainmuch more higher yield continuously. When increasing the input to the rape the yield andquality was descend and the environment at the same time was polluted in view of thisunreasonable way of fertilizering. Therefore it is necessary to control or lower the dosage offertilizer and raise fertilizer utilization efficiency. To study and expand the rape species ofsuperior quality and high-efficient is the most effectively and basically path of boostproduction.Field and greenhouse experiment in Yueyang City,San He country, Er Wang villages in2005-2006. Studying the effect of different level of nitrogen and phosphorus on yield andquality of the double low oilseed hybrid rape 753 and zhong you 821 in the paddy soil, mainthe results were as follows:At the same applying fertilizer level in rape's different periods of growth Za 753 isstronger than zhong you 821. The growth of Za 753 is:E＞C,D＞B＞A. The growth of zhongyou 821 is D＞C, B＞E＞A.. The growth of Za 753 is stronger than zhong you 821 under thepoor condition.The content of nitrogen in the plant's shoot and root are consistent with each otherunder different fertilizer level in two kinds of rape in different growth of periods. The contentof nitrogen and phosphorus in the plant's shoot and root are different under the same fertilizerlevel in two kinds of rape's different growth periods.Under different fertilizer level of rape, the production of seeds of Za 753 is:E＞C＞B＞D＞A, the production of seeds of zhong you 821is:D＞C＞E＞B＞A.The production of seeds of Za 753 is higher than zhong you 821 under the same fertilizer level for example indeficient or lowered fertilizer level conditions. The production of seeds of Za 753 is higherthan zhong you 821 under high fertilizer level except the way of D fertilizering. We canconcluded that applying fertilizer in the economic reasonable premise, The production ofseeds of Za 753 is higher than zhong you 821.Except the way D fertilizering, nitrogen efficiency of Za 735 is 3.04,2.23,1.22,3.50times to Zhong you 821 from A～E, it is said that nitrogen efficiency of Za 753 is higher toZhong you 821,it is virtues. Except seed stage, in the same stage, nitrogen efficiency of twocultivars is lower when raise fertilizer. At the same applying Zhong you 821 is highter to Za753,the rules is much more obvious. At the different fertilizer level in rape's same periods,phosphorus efficiency of Za 753 is obviously higher to Zhong you 821,the rules is much moreobvious.The content of zhong you 821's C211 and Ghccessino is much more higher thanothers,but other indexes have no obvious rules compared different fertilizer level in thethe moderate level of fertilizer contrition. The content of Za 753's C211 and Ghccessinois much more lower than zhong you 821 under any experimental disposal..