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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 Fertilizers on Growth and Nutrient Absorption of Xiangzao You 753 in a Field Experiment. The results showed that under the condition of the same amount of other fertilizers, the higher nitrogen or phosphorus ratio could increase the plant height, number of effective branches, the number of pods and the number of pod per ginkgo. The differences among treatments were significant , Branching position and 1000-grain weight did not show significant difference. However, the effect of potassium on agronomic traits of rapeseed was not consistent. The accumulation of nitrogen and phosphorus in harvested plants increased with the increase of N or P fertilizer application, The amount does not show the above law. In conclusion, the effects of fertilization on rapeseed growth and nutrient accumulation were basically the same, nitrogen fertilizer had the greatest impact, phosphate fertilizer followed, and potassium fertilizer had the least impact. Among them, the rape growth and nutrient absorption showed good N: P2O5:K2O 18.2: 9.1: 16, 18.2: 9.1: 1.5, 20: 5: 8.8.