{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,28]],"date-time":"2026-02-28T03:32:33Z","timestamp":1772249553124,"version":"3.50.1"},"reference-count":61,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2022,2,22]],"date-time":"2022-02-22T00:00:00Z","timestamp":1645488000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Key-Area Research and Development program of Guangdong Province","award":["No. 2019b020214003"],"award-info":[{"award-number":["No. 2019b020214003"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>To optimize crop water consumption and adopt water-saving measures such as precision irrigation, early identification of plant water status is critical. This study explores the effectiveness of estimating water stress in choy sum (Brassica chinensis var. parachinensis) grown in pots in greenhouse conditions using Crop Water Stress Index (CWSI) and crop vegetation indicators to improve irrigation water management. Data on CWSI and Spectral reflectance were collected from choy sum plants growing in sandy loam soil with four different soil field capacities (FC): 90\u2013100% FC as no water stress (NWS); 80\u201390% FC for light water stress (LWS); 70\u201380% FC for moderate water stress (MWS); and 60\u201370% FC for severe water stress (SWS). With four treatments and three replications, the experiment was set up as a completely randomized design (CRD). Throughout the growing season, plant water stress tracers such as leaf area index (LAI), canopy temperature (Tc), leaf relative water content (LRWC), leaf chlorophyll content, and yield were measured. Furthermore, CWSI estimated from the Workswell Wiris Agro R Infrared Camera (CWSIW) and spectral data acquisition from the Analytical Spectral Device on choy sum plants were studied at each growth stage. NDVI, Photochemical Reflectance Index positioned at 570 nm (PRI570), normalized PRI (PRInorm), Water Index (WI), and NDWI were the Vegetation indices (VIs) used in this study. At each growth stage, the connections between these CWSIW, VIs, and water stress indicators were statistically analyzed with R2 greater than 0.5. The results revealed that all VIs were valuable guides for diagnosing water stress in choy sum. CWSIW obtained from this study showed that Workswell Wiris Agro R Infrared Camera mounted on proximal remote sensing platform for assessing water stress in choy sum plant was rapid, non-destructive, and user friendly. Therefore, integrating CWSIW and VIs approach gives a more rapid and accurate approach for detecting water stress in choy sum grown under greenhouse conditions to optimize yield by reducing water loss and enhancing food security and sustainability.<\/jats:p>","DOI":"10.3390\/s22051695","type":"journal-article","created":{"date-parts":[[2022,2,22]],"date-time":"2022-02-22T22:35:00Z","timestamp":1645569300000},"page":"1695","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Rapid Estimation of Water Stress in Choy Sum (Brassica chinensis var. parachinensis) Using Integrative Approach"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7463-6592","authenticated-orcid":false,"given":"Alaa","family":"AL Aasmi","sequence":"first","affiliation":[{"name":"College of Water Conservancy and Civil Engineering, South China Agriculture University, Wushan Road No. 483, Guangzhou 510642, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6699-8972","authenticated-orcid":false,"given":"Kelvin Edom","family":"Alordzinu","sequence":"additional","affiliation":[{"name":"College of Water Conservancy and Civil Engineering, South China Agriculture University, Wushan Road No. 483, Guangzhou 510642, China"}]},{"given":"Jiuhao","family":"Li","sequence":"additional","affiliation":[{"name":"College of Water Conservancy and Civil Engineering, South China Agriculture University, Wushan Road No. 483, Guangzhou 510642, China"}]},{"given":"Yubin","family":"Lan","sequence":"additional","affiliation":[{"name":"National Center for International Collaboration Research on Precision Agricultural Aviation Pesticides Spraying Technology (NPAAC), College of Engineering, South China Agriculture University, Wushan Road No. 483, Guangzhou 510642, China"}]},{"given":"Sadick Amoakohene","family":"Appiah","sequence":"additional","affiliation":[{"name":"College of Water Conservancy and Civil Engineering, South China Agriculture University, Wushan Road No. 483, Guangzhou 510642, China"}]},{"given":"Songyang","family":"Qiao","sequence":"additional","affiliation":[{"name":"College of Water Conservancy and Civil Engineering, South China Agriculture University, Wushan Road No. 483, Guangzhou 510642, China"}]}],"member":"1968","published-online":{"date-parts":[[2022,2,22]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"205","DOI":"10.1016\/j.agwat.2016.07.022","article-title":"Effects of Water Stress on Processing Tomatoes Yield, Quality and Water Use Efficiency with Plastic Mulched Drip Irrigation in Sandy Soil of the Hetao Irrigation District","volume":"179","author":"Zhang","year":"2017","journal-title":"Agric. water Manag."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Alordzinu, K.E., Li, J., Lan, Y., Appiah, S.A., Al Aasmi, A., and Wang, H. 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