摘要
以中引6号冬小麦为观测对象,大田利用Unispec-SC型单通道便携式光谱仪观测不同灌水处理条件小麦冠层光谱特征,并结合相应遥感指数,筛选对干旱响应敏感的指数。结果表明,宁南山区冬小麦灌浆期与乳熟期的冠层光谱特征存在差异;虽然不同干旱胁迫下的冬小麦冠层光谱反射率曲线形式基本类似,但在大多数波段,反射率值的大小明显不同;在应用各种遥感指数监测宁南山区冬小麦干旱时,根据具体情况可优先在RVI和NDVI中选择,其次可以考虑选用EVI。
The canopy spectrum characters were observed,by Unispec-SC mono channel portable spectrograph,in the Zhongyin-16 winter wheat fields under different water supply treatments arranged at Longde county.According to many vegetation index methods calculated by MODIS data,the vegetation indexes by canopy spectrum observation data were calculated and selected which responded to drought sensitively.The result shows that the canopy spectrum difference between various drought treatments is in evidence in the period of milky and filling.Although the spectrum curves are similar,the reflection rate in most of spectrum band is different.We should select RVI and NDVI first,and EVI second,to monitor winter wheat drought in south Ningxia.
出处
《干旱地区农业研究》
CSCD
北大核心
2010年第2期12-16,共5页
Agricultural Research in the Arid Areas
基金
科技部农业科技成果转化资金项目"宁夏重大农业气象灾害监测预警
损失评估及防控技术"(2006GB24160429)
科技部科研院所社会公益研究专项"气候变化背景下宁夏干旱监测预警系统研究"(2005DIB3J103)
关键词
宁南山区
冬小麦
光谱特征
干旱
mountainous region of south Ningxia
winter wheat
spectrum character
drought
作者简介
张磊（1974-），男，宁夏永宁人，硕士，高级工程师，主要从事农业气象、生态学等方面的研究。E-mail：zhle．131@163．com。
