干旱区生态环境知识资源中心(Arid): 定量遥感反演作物水势的原理及其应用

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	定量遥感反演作物水势的原理及其应用
其他题名	Theory and application of leaf water potential retrieved from remote sensing.
	张杰 1; 张强1 ; 赵宏 1; 张平兰 2
ISSN	1000-4890
出版年	2008
卷号	27 期号:6 页码:916-923
中文摘要	在利用能量平衡原理估算蒸腾速率的基础上，结合大气水势和叶、气阻抗的估算，建立叶水势的遥感估算模型。应用CI-301光合作用仪观测的作物生理参数和气象参数，验证了叶水势的遥感反演精度，分析了叶水势对干旱-半干旱区气候干旱和作物生理干旱的响应敏感程度。结果表明：叶水势是反映作物干旱情况的较好指标，它不仅能够反映作物生理干旱特征，也能够反映气候干旱特征；叶水势反演结果的相对误差为3．2％～17．3％，说明遥感估算的叶水势可以用于干旱监测中，以评估作物水分胁迫。在甘肃省的干旱年份2005年，5月的叶水势为-2～-3MPa，6月的叶水势为-2MPa左右，其反映的干旱程度与植物种类有关。
英文摘要	Based on the estimation of transpiration rate by energy balance theory, and combining the estimations of atmospheric water potential and leaf and atmosphere resistance, a leaf water potential model retrieved from remote sensing was built. Some physiological and meteorological parameters observed by CI-301 apparatus were used for testing the retrieval precision of leaf water potential ; and the sensitivity of the responses of leaf water potential to physiological and climate drought in arid and semi-arid region was analyzed. The results showed that leaf water potential was a good index for reflecting drought, by which, the characteristics of physiological and climate drought could be well expressed. The retrieval error of leaf water potential from remote sensing was between 3.2% and 17.3% , indicating that the leaf water potential estimated by remote sensing could be used for monitoring drought and evaluating water stress. In the dry year of 2005 in Gansu, the leaf water potential was between - 2 and - 3 MPa in May and about - 2 MPa in June, and the drought degree was correlated to crop species.
中文关键词	叶水势 ; 干旱 ; 定量遥感
英文关键词	leaf water potential drought quantitative remote sensing.
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:3296456
来源机构	中国气象局兰州干旱气象研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/222716
作者单位	1.中国气象局兰州干旱气象研究所, 甘肃省干旱气候变化与减灾重点实验室;;干旱气候变化与减灾重点开放实验室, 兰州, 甘肃 730020, 中国; 2.甘肃省气象局气候中心, 兰州, 甘肃 730020, 中国
推荐引用方式 GB/T 7714	张杰,张强,赵宏,等. 定量遥感反演作物水势的原理及其应用[J]. 中国气象局兰州干旱气象研究所,2008,27(6):916-923.
APA	张杰,张强,赵宏,&张平兰.(2008).定量遥感反演作物水势的原理及其应用.,27(6),916-923.
MLA	张杰,et al."定量遥感反演作物水势的原理及其应用".27.6(2008):916-923.