论文部分内容阅读
以四川省大面积推广玉米品种成单30为试验材料,通过氮、磷、钾配比施肥的田间试验,研究不同施肥水平对抽雄吐丝期淹涝胁迫下玉米植株根系、茎秆、株高及产量的影响。结果表明,不同施肥水平下玉米植株根长、根数、根体积、根生物量、茎粗、茎强度、基部节间长、株高、穗位高和籽粒产量差异极显著,施肥处理结果优于对照;淹涝胁迫后,施肥处理的根体积、根生物量、茎秆强度、基部前3节平均节间长、顶部倒数3张叶平均叶长、株高较对照差异极显著,耐涝性强于对照;N_(20)+P_5+K_(15)、N_(10)+P_(15)+K_(15)、N_(15)+P_(15)+K_(15)、N_(20)+P_5+K_5、N_(20)+P_(15)+K_(15)处理5种配比施肥玉米产量极显著高于对照,分别较对照增产17.39%、10.03%、8.90%、3.39%、3.37%。生产上合理配施氮、磷、钾肥有助于减轻洪涝灾害对玉米产量的影响。
Taking the large-scale popularization of maize variety Chengdan 30 as the experimental material in Sichuan province, the effects of different fertilization levels on the root system, stalk, plant height And the impact of production. The results showed that there were significant differences in root length, root number, root volume, root biomass, stem diameter, stem intensity, base internode length, plant height, ear height and grain yield of maize at different fertilization levels. After the submergence stress, the root volume, root biomass, stalk strength, mean internode length of the first three nodes and average leaf length at the top of the last three submerges under flooding stress were significantly different from those of the control (20) + P_5 + K_ (15), N_ (10) + P_ (15) + K_ (15), N_ (15) + P_ (15) + K_ (15), N_ (20) ) + P_5 + K_5, N_ (20) + P_ (15) + K_ (15) increased significantly by 17.39%, 10.03%, 8.90% and 3.39% 3.37%. Rational allocation of nitrogen, phosphorus and potassium fertilizer in production helps to reduce the impact of flood disasters on corn production.