Dataset of in Situ SPAD Readings, in Vitro Chlorophyll Concentration Measuring, and Their Relationship: Quercus variabilis bl. in Mt. Funiu, China

WANG Zhengxing1LI Fang1

1 State Key Laboratory of Resources and Environmental Information System，Institute of Geographic Sciences and Natural Resources Research，Chinese Academy of Sciences，Beijing 100101，China

DOI:10.3974/geodb.2018.07.16.V1

Published:Nov. 2018

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Key Words：

Mt. Funiu,Quercus variabilis bl.,Chlorophyll,in situ,SPAD

Abstract：

Chlorophyll concentration (Chl.) in plant leaves is a key indicator for monitoring plant health and dynamics. But direct chlorophyll concentration measuring (Chl.) in laboratory (in vitro) is both expensive and laborious, which makes it prohibitive to conduct large scale Chl. studies. An alternative approach is to develop a statistical relationship by measuring optical readings in field (in situ) and meanwhile measuring Chl. in laboratory (in vitro). On 19 September 2018, 31 samples were collected from Quercus variabilis bl., a dominant species in the Mt. Funiu, Luanchuan, Henan province, China. Firstly, in situ SPAD readings were taken in oak leaves, using an optical measure with Minolta SPAD-502 meter. Special care has been taken to avoid major leaf veins in order to minimize uncertainties. Secondly, in vitro chlorophyll concentration measurement (Chl.) of the same oak leaves were test, with a two-step extraction and determination method for chlorophyll presented by Qiu et al (2016). Totally, there are 31 samples for in situ SPAD readings, and 93 measurements for in vitro Chl. (three Chl. for each SPAD). Finally, these 93 SPAD-Chl. pairs data are used to develop various statistical relationships and the best-fit correlation goes to an exponential correlation, with R²= 0.927. The dataset includes: 1) geolocation data of sample site; 2) data of in situ SPAD readings, in vitro chlorophyll concentration measuring: Quercus variabilis bl. in Mt. Funiu, China and the relation between them. The dataset is archived in .kmz, .shp and .xlsx data formats, consist of 8 data files with data size of 31.6 KB (Compressed to 2 files with data size of 28.4 KB).

Foundation Item：

Ministry of Science and Technology of P. R. China (2016YFA0600201)

Data Citation：

WANG Zhengxing, LI Fang. Dataset of in Situ SPAD Readings, in Vitro Chlorophyll Concentration Measuring, and Their Relationship: Quercus variabilis bl. in Mt. Funiu, China[J/DB/OL]. Digital Journal of Global Change Data Repository, 2018. https://doi.org/10.3974/geodb.2018.07.16.V1.

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