| 郭相平,刘展鹏,王青梅,郝树荣,王为木,褚琳琳.利用投影寻踪分类模型评价玉米旱后生理补偿效应[J].干旱地区农业研究,2007,(6):22~25 |
| 利用投影寻踪分类模型评价玉米旱后生理补偿效应 |
| Comprehensive Evaluation on Compensatory Effects of Rewatering after PEG Stress Based on PPC-RAGA Model |
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| DOI：10.7606/j.issn.1000-7601.2007.06.05 |
| 中文关键词: 投影寻踪分类模型 玉米旱后复水 生理指标 补偿效应 综合评价 |
| 英文关键词:PPC model water recovery after drought compensatory effect physiological properties comprehensive assessment |
| 基金项目:国家自然科学基金(50309003) |
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| 中文摘要: |
| 根据模拟干旱试验结果,建立了作物旱后生理补偿效应的投影寻踪分类模型(PPC Mode)。采用基于实码的加速遗传算法,对旱后复水玉米的多项生理指标的权重进行了优化。通过多维指标的降维处理,得到了不同生理指标的最佳投影方向和投影值。模型结果表明光合速率、气孔导度对补偿效应的影响最大,与传统综合分析法结论一致,表明该模型具有合理性。模型避免了主观因素对评价结果的影响,为节水灌溉条件下作物旱后补偿效应分析和评价提供了一种新的方法。 |
| 英文摘要: |
| A projection pursuit classification model(PPC Model) was suggested in this paper to evaluate the comprehensive compensatory effects of water recovery after drought based on simulation water stress experiments on maize The optimum projection direction and the value of the physiological properties of maize leaves were obtained based on real coded accelerating genetic algorithm(RAGA) and the comprehensive index which synthesized the characteristics of compensatory effects of the physiological properties was also got by projecting high dimensional data to low dimensional space.The results of the model indicated net photosynthetic rate and stomata conductivity had the greatest effect on compensatory effects,which was consistent with the conclusions from traditional comprehensive analysis,indicating the model was reasonable if physiological properties were chosen correctly.The model avoided subjective ingredient influences of investigator on conclusion and could be used to investigate the effects of water stress and water recovery on compensatory effects under water saving irrigation. |
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