An improved assimilation method with stress factors incorporated in the   WOFOST model for the efficient assessment of heavy metal stress levels   in rice

doi:10.1016/j.jag.2015.04.023

CORC > 北京大学 > 地球与空间科学学院

	An improved assimilation method with stress factors incorporated in the WOFOST model for the efficient assessment of heavy metal stress levels in rice
	Jin, Ming ; Liu, Xiangnan ; Wu, Ling ; Liu, Meiling
刊名	INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION
	2015
关键词	Heavy Metal stress Assimilation Remote sensing Improved WOFOST model Efficiency assessment WINTER-WHEAT YIELD ENSEMBLE KALMAN FILTER LEAF-AREA INDEX HYPERSPECTRAL REFLECTANCE CADMIUM ACCUMULATION HUNAN PROVINCE PLANTS CONTAMINATION CULTIVARS RESPONSES
DOI	10.1016/j.jag.2015.04.023
英文摘要	Heavy metal contamination in crops is a worldwide problem that requires accurate and timely monitoring. This study is aimed at improving the accuracy of monitoring heavy metal stress levels in rice utilizing remote sensing data. An assimilation framework based on remote sensing and improved crop growth model was developed to continuously monitor heavy metal stress levels over the entire period of crop growth based on the growth law of crops and the stress mechanism. Compared with other physiological indices, dry weight of rice roots (WRT) was selected as the best indicator to estimate heavy metal stress levels. The World Food Study (WOFOST) model, widely used for the description of crop growth, was improved by incorporating stress factors with overall consideration for the changes in physiological status under heavy metal stress. Three scenarios were put forward based on the stress factors fDTGA and fcvF, which, respectively, correspond to the daily total gross assimilation of CO2 and carbohydrate-to-dry matter conversion coefficient, and were analyzed for their efficiency of simulating WRT. A method of assimilating the leaf area index (LAI) retrieved from remotely sensed data into the improved WOFOST model was applied to optimize furGA and fc-vF. The results suggested that the scenario using both factors can simulate WRT under heavy metal stress more accurately, with a relative percent error (RPE) lower than 14%. Based on the RS-WOFOST assimilation framework, continuous-spatial-temporal evaluation of heavy metal stress levels based on WRT can be accomplished. (C) 2015 Elsevier B.V. All rights reserved.; National Natural Science Foundation of China [41371407]; SCI(E); ARTICLE; jinming@cugb.edu.cn; liuxn@cugb.edu.en; wl_19830807@sohu.com; liumeiling427@126.com; 118-129; 41
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/416990]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Jin, Ming,Liu, Xiangnan,Wu, Ling,et al. An improved assimilation method with stress factors incorporated in the WOFOST model for the efficient assessment of heavy metal stress levels in rice[J]. INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION,2015.
APA	Jin, Ming,Liu, Xiangnan,Wu, Ling,&Liu, Meiling.(2015).An improved assimilation method with stress factors incorporated in the WOFOST model for the efficient assessment of heavy metal stress levels in rice.INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION.
MLA	Jin, Ming,et al."An improved assimilation method with stress factors incorporated in the WOFOST model for the efficient assessment of heavy metal stress levels in rice".INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION (2015).