不同氮磷钾配比对湘杂油753生长和养分吸收的影响

采用大田小区试验研究不同氮磷钾配比对湘杂油753生长和养分吸收的影响。结果表明,在其他肥料用量一致的情况下,较高的施氮或施磷比例处理,能够提高油菜的株高、有效分枝数、角果数和每角果粒数,各处理间差异显著,分枝位、千粒重差异不显著;而施钾对油菜农艺性状的影响没有一致规律;收获期植株的氮素和磷素积累量分别随着氮肥或磷肥施用的增加而增加,而钾素积累量没有显示出以上规律。总之,施肥对油菜生长与养分积累的影响规律基本一致,氮肥影响最大,磷肥其次,钾肥影响最小;其中,油菜生长和养分吸收表现较好的是N∶P2O5∶K2O为18.2∶9.1∶16、18.2∶9.1∶1.5、20∶5∶8.8的3个处理。

Effects of Different NPK Ratios on Growth and Nutrient Absorption of Rapeseed Variety Xiangzayou 753

Field experiments were conducted to investigate the effects of different NPK ratios on growth and NPK uptake of rapeseed variety Xiangzayou 753.The results showed that under the same amount of other fertilizers,either with the higher N ratio or higher P ratio treatments could improve height of rape plant,numbers of branch,siliques per and seeds per pod and there were significant differences among treatments;while the proportion of K application had no regular consensus under the same amount of other fertilizers,but differences of branch and 1000-seeds weight among treatments were not significant.The accumulative amount of NPK in plant were correspondingly increased as the proportion of N or P fertilizer increased,while the accumulation of K was not as that.All in all,effect of fertilization on laws of rape growth and the nutrient accumulation regularity was consistent,the most impact was from N fertilizer,then P fertilizer and K fertilizer.Among all the 15 treatments,rape growth and nutrient accumulation of 1,2 and 9 treatments(the ratios of N∶P2O5∶K2O were 18.2∶9.1∶16,18.2∶9.1∶1.5 and 20∶5∶8.8,respectively) had better performance.