不同水氮条件下冬小麦高光谱特征差异性分析

doi:10.3969/j.issn.1001-5485.2015.03.019

长江科学院院报 ›› 2015, Vol. 32 ›› Issue (3): 95-98,111.DOI: 10.3969/j.issn.1001-5485.2015.03.019

不同水氮条件下冬小麦高光谱特征差异性分析

姚付启^1a,2,蔡焕杰²,孙金伟^1b,乔伟^1a

1.长江科学院 a.农业水利研究所;b.水土保持研究所,武汉 430012;
2.西北农林科技大学旱区农业水土工程教育部重点实验室，陕西杨凌 712100

收稿日期:2014-12-30 出版日期:2015-03-01 发布日期:2015-03-06
通讯作者: 蔡焕杰(1962-),男,河北藁城人,教授,博士生导师,主要从事农业节水和水资源高效利用方面的研究,(电话)029-87082233(电子信箱)caihj@nwsuaf.edu.cn。
作者简介:姚付启(1981-),男,山东费县人,工程师,博士,主要从事农业节水与农业信息技术方面的研究,(电话)027-82820495(电子信箱)fuqiyao163@163.com。
基金资助:
国家自然科学基金项目(51309016);中央级公益性科研院所基本科研业务费资助项目(CKSF2014041/NS);农业部作物需水与调控重点实验室基金项目(CWRR201401);湖北省自然科学基金项目(2013CFB401)

Spectral Characteristic of Winter Wheat with Different Water and Nitrogen Conditions

YAO Fu-qi^1,2,CAI Huan-jie²,SUN Jin-wei³,QIAO Wei¹

1.Agricultural Water Conservancy Department, Yangtze River Scientific Research Institute,Wuhan 430012, China;
2. Key Laboratory of Agricultural Soil and Water Engineering in Arid Areas under Ministry of Education, Northwest A & F University, Yangling 712100, China;
3. Soil and Water Conservation Department, Yangtze River Scientific Research Institute, Wuhan 430012, China

Received:2014-12-30 Online:2015-03-01 Published:2015-03-06

摘要/Abstract

摘要： 在2010—2011年冬小麦生长季,通过大田小区试验,利用ASD便携式野外光谱仪实测了不同水氮条件下冬小麦冠层高光谱反射率,并对不同叶面积指数(LAI)、叶绿素含量(SPAD值可以表征叶绿素含量)及不同水氮胁迫下光谱特征进行了分析。结果表明:随着LAI和SPAD值的增大,“绿峰”与“红谷”特征愈加明显;不同水氮胁迫使冬小麦高光谱特征产生差异,在不同灌溉条件下,冬小麦在可见光波段的反射率随氮素含量的减小而升高;而在近红外波段,规律则正好相反。成果可为遥感准确检测冬小麦生长状况与节水灌溉提供科学依据。

关键词: 冬小麦, 光谱特征, 水氮胁迫, 叶面积指数, 叶绿素含量

Abstract: By field experiments, the hyperspectral reflectance of winter wheat canopy with different moisture and nitrogen conditions during growth periods of 2010 and 2011 was measured by portable field spectrometer ASD. The canopy spectral characteristic in the presence of different leaf area index(LAI) , different chlorophyll content(SPAD value) and different water and nitrogen stress was analyzed. Results showed that peak of reflectance (green) and valley of adsorption (red) became more obvious with the increase of LAI and SPAD. The hyperspectral reflectance of winter wheat canopy was different in the presence of different water and nitrogen stresses. In the visible light band, the reflectivity increased with the decrease of nitrogen, but reduced in the near-infrared band.The research result could be a scientific support for winter wheat growth detection and water-saving irrigation.

Key words: winter wheat, spectral characteristic, water and nitrogen stress, leaf area index, chlorophyll content

中图分类号:

S512.11
TP79

姚付启,蔡焕杰,孙金伟,乔伟. 不同水氮条件下冬小麦高光谱特征差异性分析[J]. 长江科学院院报, 2015, 32(3): 95-98,111.

YAO Fu-qi,CAI Huan-jie,SUN Jin-wei,QIAO Wei. Spectral Characteristic of Winter Wheat with Different Water and Nitrogen Conditions[J]. JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI, 2015, 32(3): 95-98,111.

不同水氮条件下冬小麦高光谱特征差异性分析

Spectral Characteristic of Winter Wheat with Different Water and Nitrogen Conditions

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