【摘要】 为研究立丰灵对不同施氮量下机插秧水稻抗倒性及产量的影响,以弱抗倒性品种‘荃优华占’(Oryza sativa L. cv. Quanyouhuazhan)、强抗倒性品种‘全两优681’(O.sativa L. cv. Quanliangyou681)和常规优质品种‘绿银占’(O.sativa L. cv. Lvyinzhan)为材料进行试验,比较了当地常规施氮水平(纯氮165kg/hm~2,N11)和当地偏高施氮水平(纯氮240kg/hm~2,N16)下施用立丰灵对株高、倒伏指数及产量的影响。结果表明,不同施氮水平下,施用立丰灵能矮化水稻株高,但不降低水稻产量水平;弱抗倒伏性品种‘荃优华占’在N11水平下的倒伏指数显著降低,在N16水平下,倒伏指数降低,但差异不显著;对于强抗倒性品种‘全两优681’和常规品种‘绿银占’,在N11和N16水平下,施用立丰灵后,水稻的抗倒伏能力均显著增强;在N16水平下,水稻产量显著高于N11水平,主要原因是有效穗数显著增加。更多还原

【Abstract】 In order to investigate the effect of Lifengling on lodging resistance and grain yield of mechanical transplanting rice under different nitrogen fertilizer levels, the experiment was conducted using the weak lodging resistance variety "Oryza sativa L.cv.Quanyouhuazhan",the strong lodging resistance variety "O. sativa L.cv.Quanliangyou681" and the conventional high quality variety "O. sativa L.cv.Lvyinzhan".The effects of Lifengling on plant height, lodging index and yield were compared under the local normal nitrogen fertilizer level(pure nitrogen 165 kg/hm~2,N11) and the local high nitrogen fertilizer level(pure nitrogen 240 kg/hm~2,N16).The results show that under different nitrogen fertilizer levels, the rice plant height is shortened but the grain yield is not affected after application of Lifengling.The lodging index of the weak lodging resistance variety "Oryza sativa L.cv.Quanyouhuazhan" significantly decreases under the N11 level, but decreases with no significant difference under the N16 level.For the strong lodging resistance variety "O. sativa L.cv.Quanliangyou681" and the conventional high quality variety "O. sativa L.cv.Lvyinzhan",under the N11 and N16 levels, the lodging resistance of rice is significantly enhanced after application of Lifengling; under the N16 level, the rice yield is significantly higher than that under the N11 level, which is attributable to the significant increase of effective panicle number.更多还原