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。
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.
关键词
冬小麦 /
光谱特征 /
水氮胁迫 /
叶面积指数 /
叶绿素含量
Key words
winter wheat /
spectral characteristic /
water and nitrogen stress /
leaf area index /
chlorophyll content
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参考文献
[1] COLWELL J E. Vegetation Canopy Reflectance[J]. Remote Sensing of Environment, 1974, 3(3): 175-183.
[2] 唐延林，黄敬峰，王秀珍，等.水稻,玉米,棉花的高光谱及其红边特征比较 [J].中国农业科学,2004, 37(1): 29-35.(TANG Yan-lin, HUANG Jing-feng, WANG Xiu-zhen, et al. Comparison of the Characteristics of Hyperspectra and the Red Edge in Rice, Corn and Cotton[J]. Scientia Agricultura Sinica, 2004, 37(1): 29-35. (in Chinese))
[3] 方 慧，宋海燕，曹 芳，等, 油菜叶片的光谱特征与叶绿素含量之间的关系研究[J].光谱学与光谱分析, 2007,27(9): 1731-1734. (FANG Hui, SONG Hai-yan, CAO Fang, et al. Study on the Relationship Between Spectral Properties of Oilseed Rape Leaves and Their Chlorophyll Content[J]. Spectroscopy and Spectral Analysis, 2007, 27(9): 1731-1734. (in Chinese))
[4] 孙 红，李民赞，张彦娥，等,不同施氮水平下玉米冠层光谱反射特征分析[J].光谱学与光谱分析, 2010,(1): 715-719. (SUN Hong, LI Min-zan, ZHANG Yan-e, et al. Spectral Characteristics of Corn under Different Nitrogen Treatments[J]. Spectroscopy and Spectral Analysis, 2010, (1): 715-719.(in Chinese))
[5] KANEMASU E T. Seasonal Canopy Reflectance Patterns of Wheat, Sorghum, and Soybean[J]. Remote Sensing of Environment, 1974, 3(1):43-47.
[6] 黄木易，王纪华，黄文江，等,冬小麦条锈病的光谱特征及遥感监测[J].农业工程学报,2004,19(6): 154-158. (HUANG Mu-yi, WANG Ji-hua, HUANG Wen-jiang, et al. Hyperspectral Character of Stripe Rust on Winter Wheat and Monitoring by Remote Sensing[J]. Transactions of the CSAE, 2004,19(6): 154-158. (in Chinese))
[7] 李章成，周清波，吕 新，等,冬小麦拔节期冻害后高光谱特征[J].作物学报, 2008,34(5): 831-837. (LI Zhang-cheng, ZHOU Qing-bo, LV Xin, et al. Hyperspectral Features of Winter Wheat after Frost Street at Jointing Stage[J]. Acta Agronomica Sinica, 2008, 34(5): 831-837.(in Chinese))
[8] 罗菊花，黄木易，赵晋陵，等.冬小麦灌浆期蚜虫危害高光谱特征研究[J].农业工程学报, 2011,27(7): 215-219. (LUO Ju-hua, HUANG Mu-yi, ZHAO Jin-ling, et al. Spectrum Characteristics of Winter Wheat Infected by Aphid in Filling Stage[J]. Transactions of the CSAE, 2011, 27(7): 215-219.(in Chinese))
[9] 王小平，郭 铌，张 凯，等. 黄土高原不同种植密度下春小麦冠层和叶片高光谱反射特征[J].生态学杂志, 2008,27(7): 1109-1114.(WANG Xiao-ping, GUO Ni, ZHANG Kai, et al. Canopy and Leaf Hyperspectral Reflectance of Spring Wheat under Different Planting Densities in Loess Plateau[J]. Chinese Journal of Ecology, 2008, 27(7): 1109-1114. (in Chinese))
[10] 赵春江，黄文江，王纪华，等.不同品种肥水条件下冬小麦光谱红边参数研究[J].中国农业科学, 2002, 35(8): 980-987. (ZHAO Chun-jiang, HUANG Wen-jiang, WANG Ji-hua, et al. Studies on the Red Edge Parameters of Spectrum in Winter Wheat under Different Varieties, Fertilizer and Water Treatments[J]. Scientia Agricultura Sinica, 2002, 35(8): 980-987. (in Chinese))
基金
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)
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