%0 Dataset
%T Heihe comprehensive remote sensing joint experiment: observation data set of daily variation of photosynthesis effective radiation ratio (FPAR) in Yingke oasis intensive observation area (2008)
%J National Cryosphere Desert Data Center
%I National Cryosphere Desert Data Center(www.ncdc.ac.cn)
%U http://www.ncdc.ac.cn/portal/metadata/f13190be-5c44-4be2-bde0-c9a1797994cc
%W NCDC
%R 10.12072/ncdc.NIEER.db1748.2022
%A Zhou Mengwei
%K Photosynthesis;Li-6400 photosynthetic apparatus;photosynthetic effective radiation;canopy spectrum;leaf area index;surface feature spectrometer (ASD);vegetation;ground remote sensing
%X This data set is the daily variation data of FPAR measured in the corn field of Yingke oasis.Measurement content and date:(1) On July 5, 2008, in the corn field of Yingke oasis, the change information of the next day was obtained at a fixed point every hour from 10:00 to 20:00 (encrypted once every half an hour after 16:00, and the photosynthetic instrument stopped measuring after 18:30). The corn canopy spectrum was measured by ASD spectrometer and 50% gray board, the SPAD value of the whole corn leaf was measured by SPAD chlorophyll instrument, and the photosynthesis of corn leaf was measured by Li-6400 photosynthetic instrument.Raw data of maize canopy and related data shall be obtained by ASD software; SPAD value of whole maize leaves; Photo: photosynthetic rate of maize leaves (µ mol CO2 m-2 s-1); Cond: stomatal conductance (mol H2O m-2 s-1); CI: intercellular CO2 concentration (µ mol-1); Trmmol: transpiration rate (mmol H2O m-2 s-1); Vpdl: vapor pressure deficit under leaf temperature (kPa); Tleaf: blade temperature (℃); ParIn_ µ M: effective radiation of photosynthesis in leaf chamber (µ mol m-2 s-1); Parout µ M: effective radiation of external photosynthesis (µ mol m-2 s-1).Stored data: spectral data, leaf photosynthetic data, spectral data record sheet.(2) On July 9, 2008, the ASD spectrometer, 50% gray board, Li-6400 photosynthetic instrument and SunScan canopy analyzer of Beijing Academy of agricultural and Forestry Sciences of Yingke oasis were used to observe the daily changes of corn canopy spectrum, leaf photosynthesis and FPAR.It should be noted that in the whole corn canopy spectrum observation, the observation object cannot be guaranteed to be unique due to the rotation of the probe.Spectral preprocessing data source: calibration lamp data matched with spectrometer (No.: 64831). Reference calibration data: radiance spectral data synchronously obtained by 1050 spectrometer of Beijing Academy of agricultural and Forestry Sciences on July 9, 2008. 50%