荒漠植物光合器官水平气体交换测定数据（2011）

2011年7月中旬测定，1、沙拐枣，2、泡泡刺。
利用美国拉哥公司制造的LI-6400便携式光合作用系统（Portable Photosynthesis System, LI-COR, USA）和LI-3100叶面积仪等，对荒漠植物光合生理特性进行了观测。
观测资料中的符号含义如下：
Obs，观测次数； Photo，净光合速率，μmol CO2•m–2•s–1；
Cond，气孔导度，mol H2O•m–2•s–1； Ci，胞间CO2浓度，μmol CO2•mol-1；
Trmmol，蒸腾速率，mmol H2O•m–2•s–1； Vpdl，水蒸气压亏缺，kPa；
Area，叶面积，cm2； Tair，大气温度，℃；
Tleaf，叶面温度，℃； CO2R，参照室CO2浓度，μmol CO2•mol-1；
CO2S，样品室CO2浓度，μmol CO2•mol-1； H2OR，参照室水分，mmol H2O•mol-1；
H2OS，样品室水分，mmol H2O•mol-1； PARo，光量子通量密度，μmol•m–2•s–1；
RH-R，参照室空气相对湿度，%； RH-S，样品室空气相对湿度，%；
PARi，光合作用有效辐射，μmol•m–2•s–1； Press，大气压，kPa；
其它为测定时的仪器状态参数等。

Measured in mid-July 2011, the tested plant materials included 1. *Calligonum mongolicum* and 2. *Nitraria sphaerocarpa*.
Photosynthetic physiological traits of desert plants were measured using the LI-6400 Portable Photosynthesis System (LI-COR, USA) and LI-3100 Leaf Area Meter, as well as other associated instruments.
The meanings of symbols in the observation dataset are as follows:
Obs: Number of observations;
Photo: Net photosynthetic rate, μmol CO₂·m⁻²·s⁻¹;
Cond: Stomatal conductance, mol H₂O·m⁻²·s⁻¹;
Ci: Intercellular CO₂ concentration, μmol CO₂·mol⁻¹;
Trmmol: Transpiration rate, mmol H₂O·m⁻²·s⁻¹;
Vpdl: Vapor pressure deficit, kPa;
Area: Leaf area, cm²;
Tair: Air temperature, ℃;
Tleaf: Leaf temperature, ℃;
CO2R: Reference chamber CO₂ concentration, μmol CO₂·mol⁻¹;
CO2S: Sample chamber CO₂ concentration, μmol CO₂·mol⁻¹;
H2OR: Reference chamber water vapor concentration, mmol H₂O·mol⁻¹;
H2OS: Sample chamber water vapor concentration, mmol H₂O·mol⁻¹;
PARo: Photon flux density, μmol·m⁻²·s⁻¹;
RH-R: Reference chamber air relative humidity, %;
RH-S: Sample chamber air relative humidity, %;
PARi: Photosynthetically active radiation, μmol·m⁻²·s⁻¹;
Press: Atmospheric pressure, kPa;
The remaining items are instrument status parameters and other related parameters recorded during measurement.