| 摘要: |
| 【目的】研究氮（N）、磷（P2O5）、钾K2O 肥配施对烤烟产量的影响，确立合理的施肥配比方案，以提高烤烟产量。【方法】采用三因素五水平二次正交回归设计进行烤烟施肥田间试验，建立以N、P2O5、K2O 施肥量水平为变量因子、烤烟产量为目标函数的三元二次回归模型，通过计算机对所建立的氮、磷、钾肥与烤烟产量的回归模型进行优化。【结果】在低肥水平下，单施K2O的烤烟产量高于单施N和P2O5，随着施肥量的增加，单施P2O5对烤烟产量增产幅度逐渐大于单施N和K2O；因子互作效应分析结果表明，氮肥过高或者过低均不利于烤烟产量的增加，而在高P2O5、K2O水平下，烤烟仍然维持较高的产量；对所建立的N、P2O5、K2O与烤烟产量的回归模型进行优化，得出烤烟高产施肥方案。【结论】氮、磷、钾肥对烤烟产量均有显著影响，本试验条件下，施肥量为N 50.55～62.27 kg/hm2，P2O5 94.13～106.81 kg/hm2，K2O 197.64～209.23 kg/hm2时，烤烟产量可达2 800 kg/hm2以上。 |
| 关键词: 渭北地区 烤烟 氮磷钾肥配施 |
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| 基金项目:中国烟草总公司陕西省分公司科学研究与技术开发项目（ZDKJ-01-2008）；“十一五”国家科技支撑计划项目（2006BAD15B06） |
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| Optimization of high-yielding tobacco fertilization scheme based on quadratic orthogonal regression |
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| Abstract: |
| 【Objective】The paper studied the effects of N , P2O5 and K2O Oapplication on yield of flue-cured tobacco to optimize fertilization program.【Method】The three factors and five levels orthogonal combination was used to design the experiment.A ternary quadratic regression model was established based on collected data,in which N,P2O5 and K2O were independent variables and tobacco yield were dependent variables.【Result】The single-factor effect analysis showed that the yield of flu-cured tobacco fertilized with K2O only was higher than that fertilized with N or P2O5only in low-fertilizer level.With the increase of fertilizer,the yield of flue-cured tobacco fertilized with P2O5 only became the highest.Factor interaction effects showed that either high N or low N reduced the yield of flue-cured tobacco.At high P2O5 or K2O level,the yield remained high.The high-yielding tobacco fertilization scheme was obtained based on N,P2O5 K2O optimization and yield regression.【Conclusion】The model analysis showed that N,P2O5 and K2O significantly influenced tobacco yield.Optimal fertilization scheme obtained was N 50.55-62.27 kg/hm2, P2O5 94.13-106.81 kg/hm2,and K2O 197.64-209.23 kg/hm2,and tobacco yield was 2 800 kg/hm2. |
| Key words: Weibei area tobacco combined application of N,P2O5 and K2O |
