| 摘要: |
| 【目的】筛选烤烟优质高产、节水节肥的水氮耦合方案。【方法】以烤烟K326为材料，设计灌溉量(400，500，600 mm)与施氮量(以15N同位素标记，90，120，150 kg/hm2)2个因素，共计9个水氮耦合处理，测定不同水氮耦合条件下烤烟的品质、产量、灌溉水利用效率与肥料氮素利用率，并采用主成分分析和熵权系数评价模型，对不同水氮耦合方案进行评价。【结果】不同水氮耦合处理对烤烟品质和产量影响明显。主成分分析结果显示，T5方案(500 mm灌溉量+120 kg/hm2施氮量)烟叶品质最优，T4方案(400 mm灌溉量+120 kg/hm2施氮量)次之，T7方案(400 mm灌溉量+150 kg/hm2施氮量)烟叶品质最差。熵权系数评价模型分析结果表明，T4方案的熵权系数评价值最高，该方案下烤烟的产量为2 511.5 kg/hm2，灌溉水利用效率为0.63 kg/m3，肥料氮素利用率为40.49%，品质综合主成分为2.59。【结论】T4处理为烤烟优质高产的最佳水氮耦合方案。 |
| 关键词: 水氮耦合 熵权系数 示踪技术 烤烟 |
| DOI： |
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| 基金项目:公益性行业（农业）科研专项“盐碱地农业高效利用共性与特色关键技术研究与示范”（200903001） |
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| 15N tracing technique based evaluation of entropy weight coefficients of water and nitrogen coupling schemes for flue cured tobacco |
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YAN Jian-wen
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| Abstract: |
| 【Objective】This study aimed to select the best water and nitrogen coupling scheme for high quality and high yield,water-saving and fertilizer-saving tobacco production.【Method】Using K326 as target,two factors including irrigation amount (400,500,and 600 mm) and fertilizer amount (15N labeled 90,120,and 150 kg/hm2) were designed,and quality and yield of tobacco,irrigation water use efficiency and fertilizer N use efficiency under different water-nitrogen treatments were determined.Then,principle component analysis (PCA) and entropy weight coefficient evaluation model were used to evaluate different schemes.【Result】Different water and nitrogen coupling treatments had significant effects on tobacco quality and yield.PCA shows that tobacco quality of T5 treatment (500 mm irrigation amount+120 kg/hm2 fertilizer N amount) was the optimal,followed by T4 (400 mm irrigation amount+120 kg/hm2 fertilizer N amount),while tobacco quality of T7 treatment (400 mm irrigation amount+150 kg/hm2 fertilizer N amount) was the worst.Entropy weight coefficient method shows that the entropy weight coefficient value of T4 was the highest with the yield of 2 511.5 kg/hm2,the irrigation water use efficiency of 0.63 kg/m3,the fertilizer N use efficiency of 40.49%,and the comprehensive quality index of 2.59.【Conclusion】T4 was the best water and nitrogen coupling scheme for high quality and high yield flue-cured tobacco production. |
| Key words: water and nitrogen coupling entropy weight coefficient tracing technique flue-cured tobacco |
