氮肥基施深度对油菜产量和养分吸收利用的影响

Effects of Nitrogen Application Depth on Yield and Nutrient Utilization of Rapeseed

为了进一步合理高效利用氮肥,采用田间试验研究方法,研究了氮肥基施深度(4、8、12、16 cm)对油菜产量、养分吸收和氮肥利用率的影响。结果表明,不同氮肥基施深度处理的油菜产量高低次序为N16>N12>N8>N4。其中处理N16产量最高,达3383 kg/hm2,与N4产量差异达到显著水平。氮肥深施促进了油菜植株对氮、磷、钾养分的吸收利用,氮肥深施处理N16的油菜氮肥吸收利用率和农学利用率均显著高于氮肥浅施处理N4、N8。本研究条件下,氮肥基施深度以16 cm效果最佳。

In order to take full advantage of nitrogen, the field experiment fertilization depth （4, 8, 12, 16 era） on rapeseed yield, nutrient uptake and rapeseed yield decreased in the order of N16〉N12〉N8〉N4. The highest yield was conducted to study effects of N utilization. The results showed that of 3383 kg/hm2 was reached at the treatment N16, and it was significantly higher than that of treatment N4. The increase of N fertilization depth could promote nutrient absorption and utilization of rapeseed significantly. Nitrogen recovery efficiency and agronomic use efficiency of treatment N16 were notably higher than that of treatment N4 and Ns. Under the condition of this experiment, the optimal N fertilizer application depth was 16 cm.