本文主要研究内容
作者邓来飞,张飞,张海威,张贤龙,袁婕（2019）在《水胁迫下典型盐生植被梭梭光谱特征分析》一文中研究指出：荒漠地区由于气候干燥,降水稀少,水分常成为制约植被生长的因素之一,水分胁迫对植物长势和产量的影响比任何其他胁迫都要大。随着高光谱技术的发展,国内外已有众多学者利用高光谱数据研究植被遭受胁迫作用,然而这些研究对象多集中于甜菜、棉花、玉米、水稻等作物,针对干旱区盐生植被遭受胁迫作用的研究较少。梭梭作为荒漠、半荒漠地区的典型盐生植被之一,具有极高的经济和生态效益。选择梭梭作为研究对象,培育一年生梭梭,并设置三个水分梯度,形成受不同水分量胁迫的梭梭。使用原始光谱、红边位置参数,结合植被指数及二维相关光谱研究其叶片光谱特征,为干旱区利用高光谱遥感监测盐生植被提供借鉴。结果表明:(1)分析梭梭叶片反射光谱曲线发现,在可见光至中红外各波段范围内,受不同水分量胁迫作用的梭梭叶片光谱反射率有显著差异。在可见光(350～610nm)波段,各水分处理的梭梭叶片反射率依次为100mL>500mL>200mL,这是由于100和200mL水分促进梭梭内部叶绿素合成,使该波段反射率降低,而过多的水分(500mL)对梭梭内部的叶绿素合成没有更大的促进作用。在红光区(611～738nm),随着水分量的增多,受不同水分量胁迫的梭梭叶片光谱反射率依次减小。在738～1 181和1 228～1 296nm波段,受不同水分量胁迫作用的梭梭叶片光谱反射率为:200mL>100mL>500mL;在1 182～1 227nm波段,受不同水分量胁迫作用的梭梭叶片光谱反射率为:100mL>200mL>500mL。这是由于植被细胞结构对近红外区域的反射率影响较大,因而受不同水分胁迫作用的梭梭叶片光谱反射率有显著差异。在1 300～1 365和1 392～1 800nm波段,受各水分胁迫作用的梭梭叶片反射率为:100mL>200mL>500mL。这表明在500mL水分胁迫量范围内,水分越多,叶子的细胞液、细胞膜对水分的吸收能力越强,使得反射率下降。通过对原始光谱求取一阶导数并提取红边位置参数发现,各水分处理下的梭梭叶片一阶微分光谱曲线中红边位置未发生移动。这是由于梭梭在长期的干旱环境影响下,形成了特殊的适应机制,水分对其红边位置影响不敏感。(2)选取若干植被指数分析各水分处理下的梭梭光谱指数变化。当水分胁迫量由100mL增至200mL时,WI/NDWI,MSI和NDII指数值变化显著,可用于研究水分胁迫下梭梭的光谱特征。(3)使用二维相关光谱技术分析受各水分胁迫作用的梭梭光谱特征,得出在100mL水分胁迫下,在536,643,1 219和1 653nm波段处,吸收峰对水分的微扰敏感;在200mL水分胁迫下,在846和1 083nm波段处,吸收峰对水分的微扰敏感;在500mL水分胁迫下,在835和1 067nm波段处,吸收峰对水分的微扰敏感。总之,在近红外波段,与100mL水分量相比,梭梭受200和500mL水分量胁迫时,吸收峰对水分的微扰敏感度上升。由100mL水分胁迫下梭梭的二维同步相关谱图可知,1 044和1 665nm,1 072和903nm,903和1 264nm,1 230和1 061nm波段处形成正交叉峰,表明这些波段处光谱强度随水分的干扰同时变化。
Abstract
huang mo de ou you yu qi hou gan zao ,jiang shui xi shao ,shui fen chang cheng wei zhi yao zhi bei sheng chang de yin su zhi yi ,shui fen xie pai dui zhi wu chang shi he chan liang de ying xiang bi ren he ji ta xie pai dou yao da 。sui zhao gao guang pu ji shu de fa zhan ,guo nei wai yi you zhong duo xue zhe li yong gao guang pu shu ju yan jiu zhi bei zao shou xie pai zuo yong ,ran er zhe xie yan jiu dui xiang duo ji zhong yu tian cai 、mian hua 、yu mi 、shui dao deng zuo wu ,zhen dui gan han ou yan sheng zhi bei zao shou xie pai zuo yong de yan jiu jiao shao 。suo suo zuo wei huang mo 、ban huang mo de ou de dian xing yan sheng zhi bei zhi yi ,ju you ji gao de jing ji he sheng tai xiao yi 。shua ze suo suo zuo wei yan jiu dui xiang ,pei yo yi nian sheng suo suo ,bing she zhi san ge shui fen ti du ,xing cheng shou bu tong shui fen liang xie pai de suo suo 。shi yong yuan shi guang pu 、gong bian wei zhi can shu ,jie ge zhi bei zhi shu ji er wei xiang guan guang pu yan jiu ji xie pian guang pu te zheng ,wei gan han ou li yong gao guang pu yao gan jian ce yan sheng zhi bei di gong jie jian 。jie guo biao ming :(1)fen xi suo suo xie pian fan she guang pu qu xian fa xian ,zai ke jian guang zhi zhong gong wai ge bo duan fan wei nei ,shou bu tong shui fen liang xie pai zuo yong de suo suo xie pian guang pu fan she lv you xian zhe cha yi 。zai ke jian guang (350～610nm)bo duan ,ge shui fen chu li de suo suo xie pian fan she lv yi ci wei 100mL>500mL>200mL,zhe shi you yu 100he 200mLshui fen cu jin suo suo nei bu xie lu su ge cheng ,shi gai bo duan fan she lv jiang di ,er guo duo de shui fen (500mL)dui suo suo nei bu de xie lu su ge cheng mei you geng da de cu jin zuo yong 。zai gong guang ou (611～738nm),sui zhao shui fen liang de zeng duo ,shou bu tong shui fen liang xie pai de suo suo xie pian guang pu fan she lv yi ci jian xiao 。zai 738～1 181he 1 228～1 296nmbo duan ,shou bu tong shui fen liang xie pai zuo yong de suo suo xie pian guang pu fan she lv wei :200mL>100mL>500mL;zai 1 182～1 227nmbo duan ,shou bu tong shui fen liang xie pai zuo yong de suo suo xie pian guang pu fan she lv wei :100mL>200mL>500mL。zhe shi you yu zhi bei xi bao jie gou dui jin gong wai ou yu de fan she lv ying xiang jiao da ,yin er shou bu tong shui fen xie pai zuo yong de suo suo xie pian guang pu fan she lv you xian zhe cha yi 。zai 1 300～1 365he 1 392～1 800nmbo duan ,shou ge shui fen xie pai zuo yong de suo suo xie pian fan she lv wei :100mL>200mL>500mL。zhe biao ming zai 500mLshui fen xie pai liang fan wei nei ,shui fen yue duo ,xie zi de xi bao ye 、xi bao mo dui shui fen de xi shou neng li yue jiang ,shi de fan she lv xia jiang 。tong guo dui yuan shi guang pu qiu qu yi jie dao shu bing di qu gong bian wei zhi can shu fa xian ,ge shui fen chu li xia de suo suo xie pian yi jie wei fen guang pu qu xian zhong gong bian wei zhi wei fa sheng yi dong 。zhe shi you yu suo suo zai chang ji de gan han huan jing ying xiang xia ,xing cheng le te shu de kuo ying ji zhi ,shui fen dui ji gong bian wei zhi ying xiang bu min gan 。(2)shua qu re gan zhi bei zhi shu fen xi ge shui fen chu li xia de suo suo guang pu zhi shu bian hua 。dang shui fen xie pai liang you 100mLzeng zhi 200mLshi ,WI/NDWI,MSIhe NDIIzhi shu zhi bian hua xian zhe ,ke yong yu yan jiu shui fen xie pai xia suo suo de guang pu te zheng 。(3)shi yong er wei xiang guan guang pu ji shu fen xi shou ge shui fen xie pai zuo yong de suo suo guang pu te zheng ,de chu zai 100mLshui fen xie pai xia ,zai 536,643,1 219he 1 653nmbo duan chu ,xi shou feng dui shui fen de wei rao min gan ;zai 200mLshui fen xie pai xia ,zai 846he 1 083nmbo duan chu ,xi shou feng dui shui fen de wei rao min gan ;zai 500mLshui fen xie pai xia ,zai 835he 1 067nmbo duan chu ,xi shou feng dui shui fen de wei rao min gan 。zong zhi ,zai jin gong wai bo duan ,yu 100mLshui fen liang xiang bi ,suo suo shou 200he 500mLshui fen liang xie pai shi ,xi shou feng dui shui fen de wei rao min gan du shang sheng 。you 100mLshui fen xie pai xia suo suo de er wei tong bu xiang guan pu tu ke zhi ,1 044he 1 665nm,1 072he 903nm,903he 1 264nm,1 230he 1 061nmbo duan chu xing cheng zheng jiao cha feng ,biao ming zhe xie bo duan chu guang pu jiang du sui shui fen de gan rao tong shi bian hua 。
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论文作者分别是来自光谱学与光谱分析的邓来飞,张飞,张海威,张贤龙,袁婕，发表于刊物光谱学与光谱分析2019年01期论文，是一篇关于梭梭论文,水分胁迫论文,红边位置论文,二维相关光谱论文,光谱指数论文,光谱学与光谱分析2019年01期论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自光谱学与光谱分析2019年01期论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：梭梭论文; 水分胁迫论文; 红边位置论文; 二维相关光谱论文; 光谱指数论文; 光谱学与光谱分析2019年01期论文;