干旱区生态环境知识资源中心(Arid): In-situ and non-invasive measurement of stem water content of trees using an innovative interdigitated-electrodes dielectric sensor less susceptible to stem diameter variation

Arid

DOI	10.1016/j.agrformet.2021.108473
	In-situ and non-invasive measurement of stem water content of trees using an innovative interdigitated-electrodes dielectric sensor less susceptible to stem diameter variation
	Cheng, Xianglin; Yan, Xiaofei; Grantz, David A.; Xiang, Yang; de Oliveira, Ricardo F.; Huang, Lan; Wang, Zhongyi; Du, Taisheng; Cheng, Qiang
通讯作者	Cheng, Q (corresponding author), China Agr Univ, Coll Informat & Elect Engn, Beijing 100083, Peoples R China.
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
ISSN	0168-1923
EISSN	1873-2240
出版年	2021
卷号	307
英文摘要	Stem water content (StWC) of plants is an important parameter for assessing plant response to drought stress in arid and semi-arid areas and for irrigation scheduling. The measurement accuracies of in-situ non-invasive approaches are degraded by plant growth and by diurnal changes in stem diameter associated with water content. Here we develop a frequency-domain (FD) dielectric sensor operating at 100 MHz with an innovative interdigitated-electrodes (IE) probe design for measuring StWC. We characterize the performance of the IE sensor and compare it with a previously described pair-strap-ring-electrodes (2RE) FD sensor. Simulations and experimental measurements were conducted to assess the electric field distribution and volume of sensitivity (VOS) of each probe, the sensitivity of each probe to stem diameter and the accuracy of each sensor for determining StWC of three apple trees in a greenhouse environment. The simulation analysis and the measurement showed that the IE probe has a smaller but denser VOS than the 2RE probe. The sensitivity test showed that the new IE probe (0.85 mV mm(-1), R-2 = 0.7108) was less susceptible to stem diameter variation in comparison with the 2RE probe (32.83 mV mm(-1), R-2 = 0.9977). The observations in the greenhouse showed that the three apple trees (AT-1, AT-2 and AT-3) experienced a daily dehydration-rehydration cycle and the averaged midnight-to-predawn StWC gradually decreased without irrigation. According to the reference values of the maximum daily trunk shrinkage (MDS) reported by a previous study, both AT-2 and AT-3 may experience water deficit before the irrigation. Besides, the stem diameter variation decreased the measurement accuracy of 2RE sensor to be similar to 0.0410 cm(3) cm(-3) mm(-1). The stronger electric field intensity of the IE probe and its less susceptible to stem diameter variation make the new IE dielectric sensor an improved method for accurate in-situ measurement of diurnal stem water content.
英文关键词	Stem water content Interdigitated-electrodes Dielectric measurement Accuracy improvement Apple tree Water deficit
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000682515100013
WOS关键词	DAILY TRUNK SHRINKAGE ; APPLE-TREES ; FREQUENCY ; PLANT ; STORAGE ; SOIL ; FLUCTUATIONS ; IRRIGATION ; VALUES
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
来源机构	中国农业大学 ; 北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362348
作者单位	[Cheng, Xianglin; Xiang, Yang; Huang, Lan; Wang, Zhongyi; Cheng, Qiang] China Agr Univ, Coll Informat & Elect Engn, Beijing 100083, Peoples R China; [Yan, Xiaofei] Beijing Forestry Univ, Sch Technol, Beijing 100083, Peoples R China; [Grantz, David A.] Univ Calif Riverside, Kearney Agr Ctr, Dept Bot & Plant Sci, Parlier, CA 93648 USA; [de Oliveira, Ricardo F.] Escola Super Agr Luiz Queiroz USP, Dept Ciencias Biol, Piracicaba, SP, Brazil; [Du, Taisheng] China Agr Univ, Ctr Agr Water Res China, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Xianglin,Yan, Xiaofei,Grantz, David A.,et al. In-situ and non-invasive measurement of stem water content of trees using an innovative interdigitated-electrodes dielectric sensor less susceptible to stem diameter variation[J]. 中国农业大学, 北京林业大学,2021,307.
APA	Cheng, Xianglin.,Yan, Xiaofei.,Grantz, David A..,Xiang, Yang.,de Oliveira, Ricardo F..,...&Cheng, Qiang.(2021).In-situ and non-invasive measurement of stem water content of trees using an innovative interdigitated-electrodes dielectric sensor less susceptible to stem diameter variation.AGRICULTURAL AND FOREST METEOROLOGY,307.
MLA	Cheng, Xianglin,et al."In-situ and non-invasive measurement of stem water content of trees using an innovative interdigitated-electrodes dielectric sensor less susceptible to stem diameter variation".AGRICULTURAL AND FOREST METEOROLOGY 307(2021).