Temporal variability in carbon and nitrogen stable isotopes of Strobilanthes kunthianus leaf: Its photosynthetic efficacy and water-use efficiency in a warming climate

2021 ◽  
Vol 130 (4) ◽  
Author(s):  
Anjum Farooqui ◽  
Rajesh Agnihotri ◽  
Salman Khan ◽  
S K S Gahlaud ◽  
M U Sharief
Keyword(s):  
Stable Isotopes ◽  
Water Use Efficiency ◽  
Water Use ◽  
Temporal Variability ◽  
Nitrogen Stable Isotopes ◽  
Carbon And Nitrogen ◽  
Warming Climate ◽  
Use Efficiency

scholarly journals Estimating the Root Water Uptake of Surface-Irrigated Apples Using Water Stable Isotopes and the Hydrus-1D Model

Water ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1624 ◽  
Author(s):  
Lijian Zheng ◽  
Juanjuan Ma ◽  
Xihuan Sun ◽  
Xianghong Guo ◽  
Qiyun Cheng ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Water Use Efficiency ◽  
Water Use ◽  
Water Uptake ◽  
Root Water Uptake ◽  
Surface Irrigation ◽  
Apple Trees ◽  
1D Model ◽  
Use Efficiency ◽  
Hydrus 1D

The future production of irrigated fruit orchards in the Loess Plateau of China is threatened by a shortage of freshwater. To improve water use efficiency under conditions where irrigation is limited, it is necessary to quantify the root water uptake (RWU) of apple trees. The RWU of apple trees was estimated under surface irrigation using water stable isotope technology and the Hydrus-1D model. Using the Romero-Saltos and IsoSource models, the stable isotopes of water in stems, different soil depths, and different precipitation were analyzed in a 5-year-old dwarfing apple orchard during two seasons 2016 and 2017. Hydrus-1D model was able to simulate the RWU of apple using the maximum coefficient of determination (0.9), providing a root mean square error of 0.019 cm3 cm−3 and a relative error of 2.25%. The results showed that the main depth of RWU ranged from 0–60 cm during the growth season, with the main contribution occurring in the 0–40 cm depth. These findings indicated that reducing the traditional surface irrigation depth will be important for improving the irrigation water use efficiency.

scholarly journals Temporal Variability of Carbon and Nitrogen Stable Isotopes of Bivalves in Tamagawa River Estuary, Japan

2011 ◽  
Vol 67 (2) ◽  
pp. I_961-I_965
Author(s):  
Masashi KODAMA ◽  
Satoshi WATANABE ◽  
Hiroshi YAGI ◽  
Kazuo NADAOKA ◽  
Noriyoshi SUZUKI ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Temporal Variability ◽  
River Estuary ◽  
Nitrogen Stable Isotopes ◽  
Carbon And Nitrogen

scholarly journals Tree-Ring Stable Isotopes Reveal Twentieth-Century Increases in Water-Use Efficiency of Fagus sylvatica and Nothofagus spp. in Italian and Chilean Mountains

PLoS ONE ◽  
2014 ◽  
Vol 9 (11) ◽  
pp. e113136 ◽  
Author(s):  
Roberto Tognetti ◽  
Fabio Lombardi ◽  
Bruno Lasserre ◽  
Paolo Cherubini ◽  
Marco Marchetti
Keyword(s):  
Twentieth Century ◽  
Stable Isotopes ◽  
Water Use Efficiency ◽  
Water Use ◽  
Tree Ring ◽  
Fagus Sylvatica ◽  
Use Efficiency
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