Photosynthesis and Water use Efficiency of Important Species of Cold Desert Of Himachal Pradesh, India

2017 ◽  
Vol 40 (1) ◽  
pp. 41-46
Author(s):  
Poonam . ◽  
◽  
R. Bawa ◽  
Avnish Sharma ◽  
H.P. Sankhyan ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Forest Ecosystem ◽  
Himachal Pradesh ◽  
Salix Alba ◽  
Cold Desert ◽  
Dry Land ◽  
Important Species ◽  
Land Cultivation ◽  
Use Efficiency

The present study was conducted in Goshal, one of the largest villages of cold desert district of Lahaul in Himachal Pradesh, India, during 2010 to 2013 to carry out photosynthetic study and water use efficiency of various species growing in the cold deserts. We classified the study area into three major ecosystems viz; Forest Ecosystem, Alpine Pasture Ecosystem and Agro- ecosystem and found that in Forest Ecosystem Salix alba was most water use efficient tree with maximum photosynthetic rate of 36.61µ mol/m2/sec However in case of Alpine Ecosystem Podophyllum peltatum (0.014534) and Artemisia brevifolia in Agroecosystem was most water use efficient species. Thus we recommend these species for Agroforestry and aforestation purpose in the cold desert area as dry land cultivation is not possible in Agro-ecosystem and for cultivated area the only source of water is through glacial melts from the upper mountain reaches.

scholarly journals Effects of heavy metal soil pollution and acid rain on growth and water use efficiency of a young model forest ecosystem

2007 ◽  
Vol 297 (1-2) ◽  
pp. 171-183 ◽  
Author(s):  
Manoj Menon ◽  
Sandra Hermle ◽  
Madeleine S. Günthardt-Goerg ◽  
Rainer Schulin
Keyword(s):  
Heavy Metal ◽  
Water Use Efficiency ◽  
Acid Rain ◽  
Soil Pollution ◽  
Water Use ◽  
Forest Ecosystem ◽  
Use Efficiency

Studies on forest ecosystem physiology: marginal water-use efficiency of a tropical, seasonal, evergreen forest in Thailand

2018 ◽  
Vol 30 (6) ◽  
pp. 2163-2173 ◽  
Author(s):  
Mengping Chen ◽  
Guanze Wang ◽  
Shuangxi Zhou ◽  
Junfu Zhao ◽  
Xiang Zhang ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Forest Ecosystem ◽  
Evergreen Forest ◽  
Use Efficiency ◽  
Tropical Seasonal Evergreen Forest

scholarly journals Analysis on water use efficiency of Populus euphratica forest ecosystem in arid area

2021 ◽  
Author(s):  
Lianqing Xue ◽  
Fangbing Fu ◽  
Xinfang Chen ◽  
Yuanhong Liu ◽  
Qiang Han ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Forest Ecosystem ◽  
Populus Euphratica ◽  
Arid Area ◽  
Use Efficiency

scholarly journals Soil and Crop management relation with water use efficiency in Dryland agriculture

2020 ◽  
Vol 5 (01) ◽  
pp. 75-89
Author(s):  
Attia El Gayar
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Crop Production ◽  
Management Practices ◽  
Production Systems ◽  
Crop Management ◽  
Sub Saharan Africa ◽  
Future Research ◽  
Dry Land ◽  
Use Efficiency

The problem of shortage of water to crops can be resolved by increasing total water supply available to plants, increasing water use relative to other losses and efficient management of scarce water. Biophysically, solutions to many of the problems will require the improvement of soil, water, and crop management at the field, plot, and farm level: first, to increase the capture and retention of incoming (rain) water; and second, to maximize the proportion of that water productively transpired by the crop. Dry land agriculture under rain fed conditions is found mainly in Africa, the Middle East, Asia, and Latin America. In the harsh environments of Sub-Saharan Africa (SSA) and West Asia and North Africa (WANA), water is the principal factor limiting crop yield. A review has been carried out on soil and crop management research that can increase the water use efficiency. The WANA production systems are dominated by cereals, primarily wheat in the wetter and barley in the drier areas, in rotation with mainly food legumes such as chickpea, lentil and forage legumes. The SSA production systems are generally characterized by cereal/legume mixed-cropping dominated by maize, millet, sorghum, and wheat. The major constraints in both regions to crop production are low soil fertility, insecure rainfall, and low-productive genotypes, low adoption of improved soil and crop management practices, and lack of appropriate institutional support. Different cropping systems and accompanying technologies are discussed. Results indicate that there is an advantage to apply these technologies but being function of socio-economic and bio-physical conditions. It is recommended that future research focuses on integrated technology development while taking into account also different levels of scale such as field, village, and watershed.

scholarly journals Analysis on Water use Efficiency of Populus Euphratica Forest Ecosystem in Arid Area

2021 ◽  
Author(s):  
Xue Lianqing ◽  
Fu Fangbing ◽  
Chen Xinfang ◽  
Liu Yuanhong ◽  
Han Qiang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Water Use Efficiency ◽  
Water Use ◽  
Forest Ecosystem ◽  
Populus Euphratica ◽  
Carbon Dioxide Concentration ◽  
Arid Area ◽  
Carbon Gain ◽  
Energy Fluxes ◽  
Use Efficiency

Abstract Water use efficiency (WUE, the ratio of gross primary productivity (GPP) to evapotranspiration (ET)) reflects the coupled relationship between water loss and carbon gain in the process of plant photosynthetic carbon assimilation. As a dominant tree species in arid area, Populus euphratica plays an important ecological role in slowing desertification. Here, continuous observations of carbon, water and energy fluxes were carried out in Populus euphratica forest with eddy covariance (EC) technique in 2018. We systematically explained the variation characteristics of energy fluxes and WUE at different time scales, and explored the main controlling factors of WUE in drought-stressed environment based on the synchronous meteorological data. Results showed that the carbon exchange of the Populus euphratica forest ecosystem occurred mainly during the growing seasons (April–October). During this period, the entire ecosystem appeared as a carbon sink with the potential to sequester atmospheric carbon dioxide. The average daily WUE was 2.2 g C/kg H2O, which was lower than other temperate forests (2.57–6.07 g C/kg H2O) but higher than grassland, wetland and cropland. We also concluded that an increase in carbon dioxide concentration (CCO2) and air relative humidity (RH) could promote the increase of WUE. Nevertheless, WUE was negatively correlated with air temperature (Ta), photosynthetically active radiation (PAR), and normalized difference vegetation index (NDVI). Additionally, WUE increased under moderate soil water content (SWC), but decreased due to the continuously rising SWC. WUE was more strongly affected by factors affecting water consumption than carbon uptake. Under the conditions of high temperature, strong radiation and low humidity in the summer, the growth rate of ET was much larger than that of GPP. This study not only contributes to our understanding of the carbon, water and energy dynamics of the Populus euphratica forest ecosystem but also provides an important reference for ecological conservation and ecological restoration in arid regions.

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