| 不同施氮量条件下烤烟叶面积系数与冠层光谱参数的相关性 |
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| 引用本文： | 王建伟,李树人,周汉平,张仕祥,魏春阳,薛超群. 不同施氮量条件下烤烟叶面积系数与冠层光谱参数的相关性[J]. 烟草科技, 2011, 0(3) |
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| 作者姓名： | 王建伟 李树人 周汉平 张仕祥 魏春阳 薛超群 |
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| 作者单位： | 1. 中国烟草总公司郑州烟草研究院,郑州高新技术产业开发区枫杨街2号,450001
2. 河南省南阳市烟草公司方城县公司,河南省方城县城关镇文化路233号,473200 |
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| 基金项目： | 中国烟草总公司郑州烟草研究院院长基金"基于冠层光谱烤烟氮素营养相关信息提取(112008CA0380)"资助 |
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| 摘 要： | 为明确氮肥施用量对烤烟叶面积系数(LAI)和冠层光谱参数的影响,测定了不同氮肥施用量条件下烤烟不同生育期的冠层光谱特征和LAI,对二者随施氮量的变化进行了分析,并利用相关分析和回归分析确定了二者的相关性.结果表明:在一定的施氮量范围内,施氮量增加对烤烟LAI有明显的促进效应,但在打顶期的效应不及团棵期和旺长期明显;一定范围内随施氮量增加,烤烟冠层光谱中可见光波段的反射率降低,而近红外波段的反射率提高;可见光范围内500,550,600,650和670 nm处反射率与LAI呈极显著负相关,近红外区域内780和800 nm处反射率与LAI呈显著正相关,1050和1100 nm处反射率与LAI呈极显著正相关,与LAI相关性最强的植被指数为NDVI(1050,550),用其构建的回归模型预测效果较好.
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| 关 键 词： | 烤烟 叶面积系数 冠层光谱 施氮量 |
Correlation of Leaf Area Index with Canopy Reflectance Spectrum of Flue-cured Tobacco Under Different Nitrogen Application Rate |
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| WANG JIAN-WEI,LI SHU-REN,ZHOU HAN-PING,ZHANG SHI-XIANG,WEI CHUN-YANG,XUE CHAO-QUN. Correlation of Leaf Area Index with Canopy Reflectance Spectrum of Flue-cured Tobacco Under Different Nitrogen Application Rate[J]. Tobacco Science & Technology, 2011, 0(3) |
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| Authors: | WANG JIAN-WEI LI SHU-REN ZHOU HAN-PING ZHANG SHI-XIANG WEI CHUN-YANG XUE CHAO-QUN |
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| Affiliation: | WANG JIAN-WEI(1),LI SHU-REN(2),ZHOU HAN-PING(1),ZHANG SHI-XIANG(1),WEI CHUN-YANG(1),and XUE CHAO-QUN(1) 1.Zhengzhou Tobacco Research Institute of CNTC,Zhengzhou 450001,China 2.Fangcheng County Branch of Henan Province Nanyang Tobacco Company,Fangcheng 473200,Henan,China |
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| Abstract: | To confirm the effects of different nitrogen application rate on leaf area index(LAI) and canopy reflectance spectrum of flue-cured tobacco,the canopy reflectance spectrum and LAI in spherical plant stage,fast growing stage and topping stage were determined,and the correlation between them was analyzed.The results showed that: within a certain range of nitrogen application rates,LAI was promoted obviously with the increase of nitrogen fertilizer application rate during the three growing stages,while the pro... |
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| Keywords: | Flue-cured tobacco Leaf area index Canopy reflectance spectrum Nitrogen application rate |
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