scholarly journals Evaluation Effects of Different Planting Systems on Water Use Efficiency, Relative Water Content and some Plant Growth Parameters in Onion (Allium cepa L.)

2010 ◽  
Vol 2 (1) ◽  
pp. 88-93 ◽  
Author(s):  
Mousa IZADKHAH ◽  
Mehdi TAJBAKHSH ◽  
Abdollah HASANZADEH GORATTEPH
Keyword(s):  
Plant Growth ◽  
Water Use Efficiency ◽  
Water Content ◽  
Water Use ◽  
Allium Cepa ◽  
Relative Water Content ◽  
Growth Parameters ◽  
Allium Cepa L ◽  
Relative Water ◽  
Use Efficiency

Polyamines in relation to metal concentration, distribution, relative water content and abscisic acid in wheat plants irrigated with waste water heavily polluted with heavy metals

2016 ◽  
Vol 5 (05) ◽  
pp. 4534 ◽  
Author(s):  
Heshmat Soliman Aldesuquy
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Abscisic Acid ◽  
Water Use Efficiency ◽  
Water Content ◽  
Water Use ◽  
Relative Water Content ◽  
Relative Water ◽  
Use Efficiency ◽  
Growth Vigor

Present study was carried out in order to investigate the effect of grain presoaking in spermine (0.15 mM), spermidine (0.3 mM) and their interaction on growth vigor, metal distribution as well as leaf turgidity and abscisic acid in wheat plants. Waste water at concentrations 25%, 50% and 100% caused noticeable decreases in growth vigor of root and shoot, leaf area, relative water content and water use efficiency. On the other hand, waste water stress caused remarkable increases in heavy metals and saturation water deficit as well as abscisic acid content of flag leaf. Exogenous application of Spm, Spd or their interaction could counteract the adverse effects of heavy metals in waste water by improving growth vigor of root and shoot, water use efficiency, retention of leaf turgidity and decreasing abscisic acid in leaves and grains. Furthermore, these polyamines reduced heavy metals translocation from root to leaves till reach to grains.

scholarly journals Effect of relative water content and water use efficiency of Lactuca sativa under different methods of growing

2021 ◽  
Vol 17 (AAEBSSD) ◽  
pp. 126-132
Author(s):  
Marvi Sharma ◽  
Gurdev Chand ◽  
Bhav Kumar Sinha ◽  
Antara Das
Keyword(s):  
Water Use Efficiency ◽  
Water Content ◽  
Water Use ◽  
Conventional Method ◽  
Lactuca Sativa ◽  
Relative Water Content ◽  
Growing Media ◽  
Modern Agriculture ◽  
Relative Water ◽  
Use Efficiency

The present study entitled “Effect of relative water content and water use efficiency of Lactuca sativa under different methods of growing”was conducted to demonstrate water saving techniques and their role in plant growth and sustainable development that given a new dimension to modern agriculture. For experiment, two varities of lettuce was used i.e., Romaine and Grand rapid. The experiment was carried out in hydroponics having growing media and also in pots with equal amount of Farm Yard Manure at the experimental house of the Division of Plant Physiology, SKUAST-J. Growing media was therefore, applied in different ratio i.e., coco peat (100 %), Coco peat + Vermicompost (1:1), coco peat + perlite (1:1), coco peat + vermiculite (1:1), coco peat + perlite + vermiculite (1:1:1), coco peat + perlite + vermiculite + vermicompost (1:1:1:1) as well as with conventional method (soil + Manure). The performance of both varieties under hydroponic treatments was compared with the plants grown by conventional method. The experimental results revealed that among both the varities, treatment T5 performed better as compared to other treatments and should be recommended to other hydroponic growers and farmers in future.

scholarly journals Fertigation Strategies for Improving Water Use Efficiency and Limiting Nutrient Loss in Soilless Hippeastrum Production

HortScience ◽  
2016 ◽  
Vol 51 (6) ◽  
pp. 684-689 ◽  
Author(s):  
Youssef Rouphael ◽  
Giampaolo Raimondi ◽  
Rosanna Caputo ◽  
Stefania De Pascale
Keyword(s):  
Plant Growth ◽  
Water Use Efficiency ◽  
Water Use ◽  
Water Relations ◽  
Nutrient Solution ◽  
Nutrient Management ◽  
Growth Parameters ◽  
Management Strategies ◽  
Nutrient Loss ◽  
Use Efficiency

Implementing nutrient management strategies in soilless culture, which improve water use efficiency (WUE) and limit the loss of eutrophying elements without affecting crop performance, is a priority for the floriculture industry. The aim of the current research was to assess the effect of two nutrient management strategies, based on electrical conductivity (EC) or nitrate-nitrogen (N-NO3−) concentration control on plant growth, ornamental quality, plant–water relations, mineral composition, and WUE of greenhouse Hippeastrum grown in semiclosed soilless system. The recirculating nutrient solution was discharged whenever a threshold EC value of 3.0 dS·m−1 was reached (EC-based strategy), or when N-NO3− concentration decreased below the limit of 1.0 mol·m−3 (nitrate-based strategy). There were no significant differences in terms of plant growth parameters, stomatal resistance, leaf water relations, and macronutrient composition in plant tissues between the two nutrient management strategies. In the EC- and the nitrate-based strategies, the recirculating nutrient solution was flushed 10 and 5 times, respectively. The water loss (WL) and the total water use (Wuse) in the EC-based strategy were significantly higher by 261.1% and 61.5%, respectively, compared with the N-NO3−-based strategy. In contrast with the EC-based strategy, the adoption of the N-NO3−-based strategy significantly minimized the nitrate, phosphate, and potassium emissions to the environment. The effective WUE of the system (WUES) recorded in the N-NO3−-based strategy was higher by 55.9% compared with the one recorded with the EC-based strategy.

scholarly journals Physiological responses to drought of Cnidoscolus quercifolius Pohl in semi-arid conditions

2019 ◽  
Vol 6 (1) ◽  
pp. 493 ◽  
Author(s):  
Fabio Rodrigues Ramos ◽  
Antonio Lucineudo Oliveira Freire
Keyword(s):  
Soil Moisture ◽  
Stomatal Conductance ◽  
Moisture Content ◽  
Water Content ◽  
Water Use ◽  
Transpiration Rate ◽  
Relative Water Content ◽  
Soil Moisture Content ◽  
Relative Water ◽  
Use Efficiency

This study aimed to evaluate the physiological behavior of faveleira (Cnidoscolus quercifolius Pohl) plants grown in the field, in Caatinga, during wet and dry seasons. Adult plants were selected for evaluation in March and April (wet season) and May and June (dry season), during 2016. We evaluated the soil water content, water potential (Ψw), osmotic potential (Ψπ), relative water content (RWC), stomatal conductance (gs), transpiration rate (E), photosynthetic rate (A), intercellular CO2 concentration (Ci), instantaneous water use efficiency (A/E) and carboxylation efficiency (A/Ci). The reduction in water availability in the soil promoted a marked decrease in soil water potential, which was more affected than the relative water content. The opening of the stomata was affected by the decrease in soil moisture content, reducing the stomatal conductance, transpiration rate, photosynthesis rate, instantaneous water use efficiency and carboxylation efficiency. The photosynthesis was more affected than transpiration by the reduction in soil moisture content.

scholarly journals PHOTOSYNTHESIS AND TRANSPIRATION DURING GROWTH AND DEVELOPMENT OF ALLIUM CEPA L.

HortScience ◽  
1993 ◽  
Vol 28 (4) ◽  
pp. 263B-263
Author(s):  
Daniel Warnock ◽  
William Randle ◽  
Mark Rieger
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Allium Cepa ◽  
Growth And Development ◽  
Developmental Stages ◽  
Leaf Conductance ◽  
Short Day ◽  
Allium Cepa L ◽  
Use Efficiency ◽  
Inductive Photoperiod

Photosynthesis is the very essence of agriculture. Previous photosynthetic and transpirational studies of onion (Allium cepa) have been limited to specific developmental stages. Our study measured photosynthesis and transpiration in sixteen plants of a single short-day cultivar over an eleven week period containing both non- and bulb inductive photoperiods. Differences in weekly means for photosynthesis, leaf conductance, water use efficiency, and intercellular CO, were highly significant. Weekly photosynthetic means increased under a non-inductive photoperiod and peaked one week after initiating a bulb inducing photoperiod. A decrease and leveling period occurred as bulbs developed followed by a decrease as foliage lodged. Weekly photosynthetic and leaf conductance means were correlated and highly significant. Water use efficiency and intercellular CO, means remained fairly constant throughout the study suggesting that photosynthesis in unstressed onions was controlled by internal mechanisms instead of stomata.

scholarly journals Clonal Behavior in Response to Soil Water Availability in Tempranillo Grapevine cv: From Plant Growth to Water Use Efficiency

Agronomy ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 862
Author(s):  
Ignacio Tortosa ◽  
Jose M. Escalona ◽  
Guillermo Toro ◽  
Cyril Douthe ◽  
Hipolito Medrano
Keyword(s):  
Plant Growth ◽  
Water Use Efficiency ◽  
Soil Water ◽  
Water Use ◽  
Water Availability ◽  
Growth Parameters ◽  
Biomass Accumulation ◽  
Net Photosynthesis ◽  
Soil Water Availability ◽  
Use Efficiency

Climate change threatens worldwide grapevine production, especially in Mediterranean areas. To assume this challenge, the replacement of plant material to choose one more adapted to the new environmental conditions has been proposed as one of the possible solutions. Thus, the study of genetic variability in water-use efficiency (WUE) is needed to guarantee the survival of viticulture in those critical areas. In this study, the variability of WUE in 23 Tempranillo clones growth in pots and submitted to well-watered conditions and moderate water stress was studied along two consecutive years. Leaf net photosynthesis (AN), stomatal conductance (gs), and plant growth parameters were measured, in addition the instrisic WUE (AN/gs), biomass production, and water consumed were calculated. Results show a clear genotype effect for most of the studied parameters, but, with an important year by year variability. We identified different clonal behavior in response to soil water availability, that permits to classify them as water-savers vs water-spenders. In general, there was no found relationship between leaf and plant WUE, even some genotypes as 232 or 1048 were coincident in higher leaf WUE showed highly productive in terms of biomass accumulation per unit of water applied.

scholarly journals Increased photosynthesis and grain yields in maize grown with less irrigation water combined with density adjustment in semiarid regions

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9959
Author(s):  
Donghua Liu ◽  
Qianmin Jia ◽  
Juan Li ◽  
Peng Zhang ◽  
Xiaolong Ren ◽  
...  
Keyword(s):  
Grain Yield ◽  
Water Use Efficiency ◽  
Water Use ◽  
Relative Water Content ◽  
Photosynthetic Capacity ◽  
Stage Iv ◽  
Planting Density ◽  
Supplementary Irrigation ◽  
Relative Water ◽  
Use Efficiency

In order to design a water-saving and high-yield maize planting model suitable for semiarid areas, we conducted trials by combining supplementary irrigation with different planting densities. Three planting densities (L: 52,500, M: 75,000, and H: 97,500 plants ha–1) and four supplementary irrigation modes (NI: no irrigation; IV: 375 m3 ha–1 during the 11-leaf stage; IS: 375 m3 ha–1 in the silking stage; and IVS: 375 m3 ha–1 during both stages) were tested. The irrigation treatments significantly increased the leaf relative water content, but the high planting density significantly decreased the relative water content during the silking and filling stages. After supplementary irrigation during the 11-leaf stage, IV and IVS significantly increased the photosynthetic capacity, but decreased the leaf water use efficiency. IS and IVS significantly increased the photosynthetic capacity after supplementary irrigation in the silking stage over two years. During the filling stage, IV, IS, and IVS increased the two-year average net photosynthetic rate by 17.0%, 27.2%, and 30.3%, respectively. The intercellular CO2 concentration increased as the density increased, whereas the stomatal conductance, transpiration rate, net photosynthetic rate, and leaf water use efficiency decreased, and the high planting density significantly reduced the leaf photosynthetic capacity. The highest grain yield was obtained using the IVS treatment under the medium planting density, but it did not differ significantly from that with the IS treatment. Furthermore, the IVS treatment used two times more water than the IS treatment. Thus, the medium planting density combined with supplementary irrigation during the silking stage was identified as a suitable water-saving planting model to improve the photosynthetic capacity and grain yield, and to cope with drought and water shortages in semiarid regions.

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