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 Yield, Mineral Composition, Water Relations, and Water Use Efficiency of Grafted Mini-watermelon Plants Under Deficit Irrigation

HortScience ◽  
2008 ◽  
Vol 43 (3) ◽  
pp. 730-736 ◽  
Author(s):  
Youssef Rouphael ◽  
Mariateresa Cardarelli ◽  
Giuseppe Colla ◽  
Elvira Rea
Keyword(s):  
Water Stress ◽  
Plant Growth ◽  
Water Use Efficiency ◽  
Water Use ◽  
Water Relations ◽  
Fruit Quality ◽  
Stress Conditions ◽  
Irrigated Agriculture ◽  
Marketable Yield ◽  
Use Efficiency

Limited water supply in the Mediterranean region is a major problem in irrigated agriculture. Grafting may enhance drought resistance, plant water use efficiency, and plant growth. An experiment was conducted in two consecutive growing seasons to determine yield, plant growth, fruit quality, leaf gas exchange, water relations, macroelements content in fruits and leaves, and water use efficiency of mini-watermelon plants [Citrullus lanatus (Thunb.) Matsum. and Nakai cv. Ingrid], either ungrafted or grafted onto the commercial rootstock ‘PS 1313’ (Cucurbita maxima Duchesne × Cucurbita moschata Duchesne), under open field conditions. Irrigation treatments were 1.0, 0.75, and 0.5 evapotranspiration rates. In both years (2006 and 2007), marketable yield decreased linearly in response to an increase in water stress. When averaged over year and irrigation rate, the total and marketable yields were higher by 115% and 61% in grafted than in ungrafted plants, respectively. The fruit quality parameters of grafted mini-watermelons such as fruit dry matter and total soluble solids content were similar in comparison with those of ungrafted plants, whereas titratable acidity, K, and Mg concentrations improved significantly. In both grafting combinations, yield water use efficiency (WUEy) increased under water stress conditions with higher WUE values recorded in grafted than ungrafted plants. The concentration of N, K, and Mg in leaves was higher by 7.4%, 25.6%, and 38.8%, respectively, in grafted than in ungrafted plants. The net assimilation of CO2, stomatal conductance, relative water content, leaf, and osmotic potential decreased under water stress conditions. The sensitivity to water stress was similar between grafted and ungrafted plants, and the higher marketable yield from grafted plants was mainly the result of an improvement in nutritional status and higher CO2 assimilation and water uptake from the soil.

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.

MODIFICATION OF MICROCLIMATE CONDITIONS FOR IMPROVING TOMATO PLANT GROWTH COMPONENTS AND WATER USE EFFICIENCY

2021 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
Wafaa Abd El-Bary ◽  
Mahmoud Hegazi ◽  
Khaled El-Bagoury ◽  
Wael Sultan ◽  
Manal Mubarak
Keyword(s):  
Plant Growth ◽  
Water Use Efficiency ◽  
Water Use ◽  
Tomato Plant ◽  
Use Efficiency ◽  
Microclimate Conditions

scholarly journals Agronomic Biofortification of Cayenne Pepper Cultivars with Plant Growth-Promoting Rhizobacteria and Chili Residue in a Chinese Solar Greenhouse

2021 ◽  
Vol 9 (11) ◽  
pp. 2398
Author(s):  
Ibraheem Olamide Olasupo ◽  
Qiuju Liang ◽  
Chunyi Zhang ◽  
Md Shariful Islam ◽  
Yansu Li ◽  
...  
Keyword(s):  
Plant Growth ◽  
Water Use Efficiency ◽  
Water Use ◽  
Bacillus Amyloliquefaciens ◽  
Net Photosynthesis ◽  
Plant Growth Promoting Rhizobacteria ◽  
Plant Growth Promoting ◽  
Use Efficiency ◽  
Growth Promoting ◽  
Agronomic Biofortification

Agronomic biofortification of horticultural crops using plant growth-promoting rhizobacteria (PGPR) under crop residue incorporation systems remains largely underexploited. Bacillus subtilis (B1), Bacillus laterosporus (B2), or Bacillus amyloliquefaciens (B3) was inoculated on soil containing chili residue, while chili residue without PGPR (NP) served as the control. Two hybrid long cayenne peppers, succeeding a leaf mustard crop were used in the intensive cultivation study. Net photosynthesis, leaf stomatal conductance, transpiration rate, photosynthetic water use efficiency, shoot and root biomass, and fruit yield were evaluated. Derivatives of folate, minerals, and nitrate contents in the pepper fruits were also assessed. B1 elicited higher net photosynthesis and photosynthetic water use efficiency, while B2 and B3 had higher transpiration rates than B1 and NP. B1 and B3 resulted in 27–36% increase in pepper fruit yield compared to other treatments, whereas B3 produced 24–27.5% and 21.9–27.2% higher 5-methyltetrahydrofolate and total folate contents, respectively, compared to B1 and NP. However, chili residue without PGPR inoculation improved fruit calcium, magnesium, and potassium contents than the inoculated treatments. ‘Xin Xian La 8 F1’ cultivar had higher yield and plant biomass, fruit potassium, total soluble solids, and total folate contents compared to ‘La Gao F1.’ Agronomic biofortification through the synergy of Bacillus amyloliquefaciens and chili residue produced better yield and folate contents with a trade-off in the mineral contents of the greenhouse-grown long cayenne pepper.

scholarly journals Improving Agricultural Rain Water Use Efficiency by Land and Nutrient Management and the Intercropping System in Farmers’ Fields in Mali

2017 ◽  
Vol 4 (7) ◽  
pp. 1-8
Author(s):  
Diakalia Sogodogo ◽  
Béjamé Coulibaly ◽  
Bouya Traoré ◽  
Mme Dao Rokia Coulibaly ◽  
Ibrahima Dramé ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Nutrient Management ◽  
Rain Water ◽  
Use Efficiency

scholarly journals Evapotranspiration, crop coefficient and water use efficiency of coriander grown in tropical environment

2018 ◽  
Vol 36 (4) ◽  
pp. 446-452 ◽  
Author(s):  
Vicente de PR da Silva ◽  
Inajá Francisco de Sousa ◽  
Alexandra L Tavares ◽  
Thieres George F da Silva ◽  
Bernardo B da Silva ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Crop Production ◽  
Field Experiments ◽  
Growth Parameters ◽  
Crop Coefficient ◽  
Growing Season ◽  
Tropical Environment ◽  
Mean Values ◽  
Use Efficiency

ABSTRACT The water scarcity is expected to intensify in the future and irrigation becomes an essential component of crop production, especially in arid and semiarid regions, where the available water resources are limited. Four field experiments were carried out at tropical environment in Brazil in 2013 and 2014, in order to evaluate the effect of planting date on crop evapotranspiration (ETc), crop coefficient (Kc), growth parameters and water use efficiency (WUE) of coriander (Coriandrum sativum) plants. The planting dates occurred during winter, spring, summer and autumn growing seasons. ETc was obtained through the soil water balance method and the reference evapotranspiration (ETo) through the Penman-Monteith method, using data collected from an automatic weather station located close to the experimental area. The results of the research showed that the mean values of coriander ETc and Kc were 139.8 mm and 0.87, respectively. Coriander water demand is higher in the summer growing season and lower in the winter; however, its yield is higher in the autumn and lower in the winter. Coriander has higher yield and development of its growth variables in the autumn growing season. The results also indicated that the interannual climate variations had significant effects on most growth variables, as yield, ETc and Kc of coriander grown in tropical environment.

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