Growth and gas exchange of purple basil submitted to salinity and foliar nitrogen fertilization

Salinity is one of the modern agriculture major obstacles, causing several physiological disturbances in plants, adversely affecting its growth and development. Therefore, some techniques are required in order to alleviate the negative effects of salinity stress on plants, as for example an adequate nitrogen fertilization. The aim of this study was to assess the ecophysiological responses of sugar apple plants (Annona squamosa L.) submitted to different salinity levels and nitrogen fertilization doses. The experimental design was a randomized block in an incomplete factorial scheme, with five electrical conductivities of the irrigation water (ECw: 0.5, 1.01, 2.25, 3.49 and 4.0 dS m-1) and five nitrogen doses (0, 101, 350, 598.2 and 700 mg dm-3), with four replicates, generated from the Box Central Composite experimental design matrix. Through a daily course, it was observed variations in gas exchange, chlorophyll content and fluorescence parameters. The gas exchange, chlorophyll content and fluorescence parameters were measured on photosynthetically active leaves. There was significant interaction between the salinity levels (ECw) and nitrogen doses for the chlorophyll indexes. The electrical conductivity of the irrigation water caused significant negative effects on chlorophyll fluorescence. Therefore, it can be stated that the sugar apple plants ecophysiology varies through the day and that salinity affects its chlorophyll content and fluorescence.

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Gas exchange in yellow passion fruit under irrigation water salinity and nitrogen fertilization

Revista Brasileira de Engenharia Agrícola e Ambiental ◽

10.1590/1807-1929/agriambi.v26n2p135-141 ◽

2022 ◽

Vol 26 (2) ◽

pp. 135-141

Author(s):

José A. C. Wanderley ◽

Carlos A. V. de Azevedo ◽

Marcos E. B. Brito ◽

Fagner N. Ferreira ◽

Mailson A. Cordão ◽

...

Keyword(s):

Gas Exchange ◽

Irrigation Water ◽

Nitrogen Fertilization ◽

Co2 Concentration ◽

Passion Fruit ◽

Water Salinity ◽

Irrigation Water Salinity ◽

Electrical Conductivities ◽

Salinity Levels ◽

Internal Co2

ABSTRACT The objective of this study was to evaluate the gas exchange of ‘Redondo Amarelo’ passion fruit seedlings under the mitigating action of nitrogen fertilization on the salinity of irrigation water. The experiment was carried out in a greenhouse of the Universidade Federal de Campina Grande (CCTA-UFCG), Campus of Pombal, PB, Brazil, The experimental design was in randomized blocks, split plots, comprising five irrigation water electrical conductivities (plot) (ECw) (0.3; 1.0; 1.7; 2.4 and 3.1 dS m-1) and five doses of nitrogen (subplot) (60; 80; 100; 120 and 140% of 300 mg of N dm-3), in five blocks. Plants were grown in pots (Citropote JKS®) with volume of 3.780 mL, filled with soil, bovine manure, wood shavings in a proportion of 2:1:0.5 (mass basis), respectively. Water with salinity levels was applied in the period from 40 to 85 days after sowing. The internal CO2 concentration, transpiration, stomatal conductance and photosynthesis were measured at 55 and 70 days after sowing. There was an attenuating effect of nitrogen doses at irrigation water electrical conductivities of 1.7 and 2.4 dS m-1 on photosynthesis at 55 DAS. Irrigation water salinity reduces most of the variables evaluated, especially at the highest level studied (3.1 dS m-1).

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Simultaneous Effects of Foliar Nitrogen, Temperature, and Humidity on Gas Exchange in Pinus radiata

Functional Plant Biology ◽

10.1071/pp9950615 ◽

1995 ◽

Vol 22 (4) ◽

pp. 615 ◽

Cited By ~ 6

Author(s):

DW Sheriff ◽

JP Mattay

Keyword(s):

Gas Exchange ◽

Pinus Radiata ◽

Vapour Pressure ◽

Measurement Data ◽

Carbon Assimilation ◽

Vapour Pressure Deficit ◽

Leaf Temperature ◽

Carbon Gain ◽

Foliar Nitrogen ◽

Foliar N

Seedlings of Pinus radiata were grown in a glasshouse in large pots with sand as the potting mix. They were kept well-watered and frequently supplied with nutrient solutions which contained different amounts of nitrogen for different treatments. Carbon assimilation and diffusive conductance of the foliage were measured under steady-state conditions at saturating light in all treatments. Experimental variables were leaf-air vapour pressure difference and leaf temperature at time of measurement. Data were fitted to a non-linear regression equation to examine responses of carbon assimilation, diffusive conductance, transpiration, assimilatory nitrogen-use efficiency, and assimilatory transpiration efficiency to foliar nitrogen concentration expressed on a leaf area basis ([N]), to leaf temperature, and to leaf-air vapour pressure (D). Parameters from the regression have been used to plot three-dimensional surfaces, so that simultaneous effects of experimental variables can be easily visualised. Carbon assimilation increased linearly with foliar [N], declined exponentially as D increased, and had a broad temperature optimum between c. 14 and 38�C. Diffusive conductance increased linearly with foliar [N], was related to the reciprocal of D, and declined as temperature increased. Using climatic vapour pressure deficit and air temperature data for Canberra, ACT, and for Mount Gambier, SA, and with the functions that had been fitted to experimental data, it was found that these regional climatic differences have potential for appreciably affecting carbon gain and water loss in the regions, which have P. radiata plantations. Predicted differences in carbon gain are of the order of reported differences in stem growth in the regions. This shows the need to take into account regional variation in climatic variables that strongly affect gas exchange when investigating regional differences in productivity.

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Growth and Gas Exchange in Castor Bean Plants Under Saline Stress in Different Phenological Phases and Nitrogen Fertilization

10.12702/ii.inovagri.2014-a007 ◽

2014 ◽

Author(s):

G.S. Lima ◽

R.G. Nobre ◽

H.R. Gheyi ◽

L.A.A. Soares ◽

G.S. Lourenço ◽

...

Keyword(s):

Gas Exchange ◽

Nitrogen Fertilization ◽

Castor Bean ◽

Saline Stress ◽

Bean Plants ◽

Phenological Phases

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Managing Late-Season Foliar Nitrogen Fertilization to Increase Grain Protein for Winter Wheat

Agronomy Journal ◽

10.2134/agronj2016.02.0106 ◽

2016 ◽

Vol 108 (6) ◽

pp. 2329-2338 ◽

Cited By ~ 5

Author(s):

Curtis D. Dick ◽

Nathanael M. Thompson ◽

Francis M. Epplin ◽

Daryl B. Arnall

Keyword(s):

Winter Wheat ◽

Nitrogen Fertilization ◽

Grain Protein ◽

Foliar Nitrogen ◽

Late Season

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Creeping Bentgrass Putting Green Response to Foliar Nitrogen Fertilization

Agronomy Journal ◽

10.2134/agronj2012.0157 ◽

2012 ◽

Vol 104 (6) ◽

pp. 1589-1594 ◽

Cited By ~ 6

Author(s):

Qing Zhu ◽

Maxim J. Schlossberg ◽

Ray B. Bryant ◽

John P. Schmidt

Keyword(s):

Nitrogen Fertilization ◽

Creeping Bentgrass ◽

Foliar Nitrogen ◽

Putting Green ◽

Green Response

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Nitrogen Fertilization and Liming Improves Growth, Production, Gas Exchange and Post-Harvest Quality of Yellow Flower Jambu

Journal of Agricultural Studies ◽

10.5296/jas.v8i3.16720 ◽

2020 ◽

Vol 8 (3) ◽

pp. 756

Author(s):

Vivian Christine Nascimento Costa ◽

Mário Lopes da Silva Júnior ◽

Italo Marlone Gomes Sampaio ◽

Ricardo Falesi Palha de Moraes Bittencourt ◽

Stefany Priscila Reis Figueiredo ◽

...

Keyword(s):

Gas Exchange ◽

Nitrogen Fertilization ◽

Physiological Responses ◽

Biomass Accumulation ◽

Titratable Acidity ◽

Production Performance ◽

Soluble Solids ◽

Post Harvest ◽

Growth Production

Jambu is a vegetable, widely consumed in the Brazilian North Region, both in typical foods and medicinal herb. Despite its versatility, there are uncountable challenges in relation to its cultivation, especially with regard to the availability of information on nutritional management, such as the lack of data on the effect of liming associated with the supply of nitrogen (N) on the production performance of the crop. Thus, the effect of nitrogen fertilization and liming on growth, production, physiological responses and post-harvest quality of the yellow-flowered variety jambu was evaluated. The experimental design was randomized in factorial blocks (6 x 2), with five repetitions. The treatments consisted in the combination of six doses of N (0; 60; 90; 120; 150 and 180 kg ha-1) with and without liming application (0 and 70% V). The variables of growth, production, gas exchange and post-harvest quality of jambu were evaluated. Standardly, there was interaction between N-dose and liming factors for most of the analyzed variables, except for titratable acidity and total soluble solids and titratable acidity ratio. In general, the increasing of N doses combined with liming positively affected growth, production, physiological responses and post-harvest quality, and it was observed that in the 170 kg ha-1 dose of N higher response was obtained in the biomass accumulation of the aerial part and in the 180 kg ha-1 dose of N maximum production of inflorescences. Therefore, the use of correctives associated with nitrogen fertilization is recommended to obtain more significant production and quality of jambu.

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Physiological changes of pomegranate seedlings under salt stress and nitrogen fertilization

Revista Brasileira de Engenharia Agrícola e Ambiental ◽

10.1590/1807-1929/agriambi.v25n7p453-459 ◽

2021 ◽

Vol 25 (7) ◽

pp. 453-459

Author(s):

Lauriane A. dos A. Soares ◽

Sabrina G. de Oliveira ◽

Geovani S. de Lima ◽

Pedro D. Fernandes ◽

Railene H. C. R. Araújo ◽

...

Keyword(s):

Salt Stress ◽

Gas Exchange ◽

Photosynthetic Pigments ◽

Irrigation Water ◽

Nitrogen Fertilization ◽

Electrolyte Leakage ◽

Co2 Assimilation ◽

Water Salinity ◽

Physiological Changes ◽

Irrigation Water Salinity

HIGHLIGHTS Irrigation water salinity alters gas exchange and biosynthesis of photosynthetic pigments in po-megranate. The reduction in CO2 assimilation in pomegranate plants under salt stress is related to non-stomatal factors. Increasing nitrogen doses increase electrolyte leakage in pomegranate seedlings.

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