不同施肥处理对油菜品种产量的影响

Effect on seed production with gradient fertilization of rape varieties

利用正交试验设计研究了氮磷肥配合施用对不同油菜品种的种子产量的影响。结果表明随着氮肥施用量的增加,产量相应增加且差异显著(P<0.05);在不施氮肥的情况下,施加磷肥可以显著增产;在较低的施氮(N1,即施肥量为65 kg/hm2)条件下,施磷处理较不施磷处理有增产趋势,且偏高水平磷施肥量(即P3:726.5 kg/hm2)使产量显著增加(P<0.05);在较高氮肥(N3:施氮肥量为321 kg/hm2)条件下,施用低量磷肥(P1:198 kg/hm2),增产8.4%。氮、磷肥的配合施用总体可以达到增产效果。综合比较品种、氮、磷肥配施的产量情况,施肥、品种组合:N2、陇油5号、P3的种子产量最高,可达2 900 kg/hm2。

In this experiment, the effect of nitrogen and phosphorus fertihzer on the yield of different rape varieties was studied by orthogonal experiment design. With the increase of nitrogen fertilizer application, yield increased and showed significant difference （P〈0.05）; under no nitrogen fertilizer, the yield can significantly increase with the application of phosphate fertilizer; under low nitrogen conditions （N1, that fertilizer is 65 kg/hm~）, phosphorus treatment compare with no P treatment had an yield increasing trend, and high levels of phosphorus fertilization amount （i.e.P3：726.5 kg/hm~） production increased significantly（P〈0.05）; at higher nitrogen conditions （N3：nitrogenous fertilizer quantity is 321 kg/hmZ）, the application of low phosphorus （Pl ： 198 kg/hm2）, yield increasing 8.4%. The combined application of nitrogen and phosphorus fertilizer can achieve increasing yield. Comprehensive comparison of varieties, nitrogen and phosphorus fertilizer production, fertilization, variety combination： N2 and Long-you No.5, P3 has the highest seed yield, reaching at 2 900 kg/hm2.