Gas exchanges and mineral content of corn crops irrigated with saline water

This study aimed to evaluate the interaction between the fertilization with nitrogen (N) and phosphorus (P) and irrigation with saline water on the water relations, gas exchanges and chlorophyll a fluorescence in West Indian cherry in the vegetative stage. The study was carried out in protected environment, using lysimeters filled with clay loam Regolithic Neosol, with low P content, installed in a randomized block design, arranged in a factorial scheme with five levels of electrical conductivity of irrigation water (ECw), and four managements of P and N fertilization, with three replicates and one plant per plot. Along the experiment, water relations, gas exchanges and chlorophyll a fluorescence were evaluated in West Indian cherry plants. The increase in irrigation water salinity reduces the gas exchanges of the plants, but the increment of 40% in N supply increases the photosynthetic activity of West Indian cherry at recommendation levels higher than 100:100% of the P/N ratio, when irrigated with ECw of up to 3.0 dS m-1. The combined action of N and P, at doses of 140:140% N/P recommendation, increases leaf turgor in the plants, regardless of the ECw level. The increment of 40% in N dose reduces the effects of salinity on the initial fluorescence of chlorophyll a in West Indian cherry irrigated with up to 2.2 dS m-1.

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Gas exchanges and growth of cotton cultivars under water salinity

Revista Brasileira de Engenharia Agrícola e Ambiental ◽

10.1590/1807-1929/agriambi.v23n6p393-399 ◽

2019 ◽

Vol 23 (6) ◽

pp. 393-399

Author(s):

André A. R. da Silva ◽

Luana L. de S. A. Veloso ◽

Ronaldo do Nascimento ◽

Elka C. S. Nascimento ◽

Carlos V. de C. Bezerra ◽

...

Keyword(s):

Irrigation Water ◽

Sandy Loam ◽

Saline Water ◽

Water Salinity ◽

Gas Exchanges ◽

Randomized Design ◽

Irrigation Water Salinity ◽

Completely Randomized Design ◽

Semi Arid Region ◽

Response To Water

ABSTRACT Indication of salt-tolerant cotton cultivars can make the agricultural exploitation with saline water irrigation feasible in the Brazilian semi-arid region. Thus, this study aimed to evaluate the gas exchanges and growth of cotton cultivars irrigated with saline water. The study was conducted in pots adapted as drainage lysimeters under greenhouse conditions, using a sandy loam Entisols as substrate. Treatments were distributed in completely randomized design, in 5 x 2 factorial arrangement, relative to five levels of irrigation water electrical conductivity - ECw (1.5, 3.0, 4.5, 6.0 and 7.5 dS m-1) and two cotton cultivars (BRS 368 RF and BRS Safira). Increase in irrigation water salinity inhibits the vegetative growth and gas exchanges of the cotton cultivars BRS Safira and BRS 368 RF. Leaf area and instantaneous carboxylation efficiency are the most affected variables. Physiological and growth performance of the cultivar BRS Safira in response to water salinity was higher than that of BRS 368 RF.

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Ecophysiology of cowpea (Vigna unguiculata L.) cultivated under different saline and biofertilizer levels

Australian Journal of Crop Science ◽

10.21475/ajcs.20.14.06.p2048 ◽

2020 ◽

pp. 923-931

Author(s):

Rafael Santiago da Costa ◽

Letícia Kenia Bessa de Oliveira ◽

Aiala Vieira Amorim ◽

Fred Denilson Barbosa Silva ◽

Albanise Barbosa Marinho ◽

...

Keyword(s):

Leaf Area ◽

Seed Weight ◽

Saline Water ◽

Dry Mass ◽

Main Stem ◽

Liquid Form ◽

Gas Exchanges ◽

Growth Physiology ◽

Goat Manure ◽

Total Seed

The objective of this study was to evaluate the growth, physiology, and production of cowpea plants grown under different levels of salinity and doses of mixed biofertilizer. The experiment was set in a completely randomized 3 x 4 factorial design, corresponding to three levels of irrigation with saline water (ECw: 0.5, 2.5 and 4.5 dS m-1) and four doses of biofertilizer (0, 800, 1600 and 2400 milliliters - mL), with five repetitions. The biofertilizer was obtained by means of an aerobic process, using a mixture of water, goat manure, and wood ashes, and it was applied in the liquid form, once a week, and directly into the soil. After 70 days, gaseous exchanges were evaluated, and the length of the main stem, the diameter of the stem, and the leaf area were measured. Furthermore, the number of pods produced, mean pod size, total pod weight, total seed weight, hundred seed weight, and yield were estimated. It was observed that the application of mixed biofertilizer promoted increments of 28.98% in leaf area, 32.78% in length of the main stem, and 21.55% in total dry mass. Weekly doses of 1600 mL promoted significant increases in gas exchanges. The application of weekly doses of 1600 mL of mixed biofertilizer promoted growth increases in physiological and productive parameters when the plants were irrigated with saline water up to 2.5 dS m-1, suggesting that the biofertilizer reduces the deleterious effects of salinity.

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Influence of Nitrogen and Saline Water on the Growth and Partitioning of Mineral Content in Maize

Journal of Plant Nutrition ◽

10.1080/01904160802660768 ◽

2009 ◽

Vol 32 (3) ◽

pp. 458-469 ◽

Cited By ~ 4

Author(s):

Muhammad Irshad ◽

A. Egrinya Eneji ◽

Riaz A. Khattak ◽

Abdullah Khan

Keyword(s):

Mineral Content ◽

Saline Water

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Morphophysiology of Tahiti lime grafted onto Sunki mandarin hybrids under salt stress

Revista Brasileira de Engenharia Agrícola e Ambiental ◽

10.1590/1807-1929/agriambi.v23n8p598-606 ◽

2019 ◽

Vol 23 (8) ◽

pp. 598-606

Author(s):

Luderlândio A. Silva ◽

Marcos E. B. Brito ◽

Pedro D. Fernandes ◽

Francisco V. da S. Sá ◽

Rômulo C. L. Moreira ◽

...

Keyword(s):

Salt Stress ◽

Saline Water ◽

Block Design ◽

Flowering Stage ◽

Gas Exchanges ◽

Rangpur Lime ◽

Randomized Block Design ◽

Irrigation Water Salinity ◽

Electrical Conductivities ◽

One Year

ABSTRACT This study aimed to evaluate the growth and physiology of citrus scion/rootstock combinations irrigated with saline water until the pre-flowering stage. The experiment was conducted in drainage lysimeters with capacity for 150 dm3, in randomized block design in a 2 x 10 factorial scheme, corresponding to two electrical conductivities of water (S1 = 0.3 and S2 = 3.0 dS m-1) and ten scion/rootstock combinations (nine hybrids and one commercial variety) grafted with Tahiti lime, in three repetitions and one plant per plot. Grafted seedlings were transplanted one year after sowing, subjected to salt stress from 15 days after transplanting until the pre-flowering period, and evaluated for gas exchanges and growth. The irrigation with 3.0 dS m-1 saline water did not influence the photosynthetic activity of the studied citrus scion/rootstock combinations until the pre-flowering. The genotype Santa Cruz Rangpur lime (LCRSTC) was more sensitive to irrigation water salinity in terms of growth. The least sensitive combinations to salinity were Tahiti lime grafted onto TSKFL x (LCR x TR) - 018, TSKFL x TRBK - 011 and TSKFL x TRBK - 30.

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Plant development, gas exchanges and pigments of Mesosphaerum suaveolens submitted to osmoconditioning and saline stress

Acta Botanica Croatica ◽

10.37427/botcro-2021-005 ◽

2020 ◽

Vol 80 (1) ◽

Author(s):

Francisco Romário Andrade Figueiredo ◽

Jackson Silva Nóbrega ◽

Reynaldo Teodoro de Fátima ◽

Toshik Iarley da Silva ◽

Rodrigo Garcia da Silva Nascimento ◽

...

Keyword(s):

Irrigation Water ◽

Saline Water ◽

Block Design ◽

Statistical Design ◽

Saline Stress ◽

Negative Effects ◽

Gas Exchanges ◽

Chlorophyll Pigments ◽

Randomized Block Design ◽

Dry Biomass

Salinity is one of the main plant abiotic stresses which affects the establishment and development crops. Hence, the search for technologies that minimize the damage caused by salinity is essential. The aim of the present work was to evaluate the effect of salinity stress and osmotic conditioning of seeds on the biomass, gas exchanges and chlorophyll pigments in Mesosphaerum suaveolens (L.) Kuntze. The statistical design adopted was a randomized block design, combined according to the Central Composite Design, referring to electrical conductivities of irrigation water and osmotic potentials, with minimum (- α) and maximum (α) values of 0.5 and 10.0 dS m-1 and 0.0 and -1.0 MPa, respectively, totaling nine combinations. The characteristics of dry biomass, gas exchange and chlorophyll indices were evaluated at 45 days after irrigation with saline water started. The salinity of irrigation water severely affected the dry biomass and the gas exchanges of M. suaveolens. Irrigation water of electrical conductivity above 3.2 dS m-1 caused reductions in chlorophyll a, b and total contents in M. suaveolens plants. Seed osmoconditioning did not attenuate the negative effects of saline stress on M. suaveolens plants.

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Gas exchanges and growth of passion fruit under saline water irrigation and H2O2 application

Revista Brasileira de Engenharia Agrícola e Ambiental ◽

10.1590/1807-1929/agriambi.v23n12p945-951 ◽

2019 ◽

Vol 23 (12) ◽

pp. 945-951 ◽

Cited By ~ 2

Author(s):

Elysson M. G. Andrade ◽

Geovani S. de Lima ◽

Vera L. A. de Lima ◽

Saulo S. da Silva ◽

Hans R. Gheyi ◽

...

Keyword(s):

Hydrogen Peroxide ◽

Irrigation Water ◽

Saline Water ◽

Co2 Assimilation ◽

Passion Fruit ◽

Water Salinity ◽

Gas Exchanges ◽

Irrigation Water Salinity ◽

Number Of Leaves ◽

Yellow Passion Fruit

ABSTRACT The study was carried out to evaluate the photosynthetic efficiency and growth of yellow passion fruit, cultivated under different levels of irrigation water salinity and exogenous application of hydrogen peroxide. The experiment was carried out in greenhouse of the Universidade Federal de Campina Grande, PB, Brazil, using drainage lysimeters with capacity for 100 dm3, filled with Entisol of sandy texture. The experimental design was randomized blocks using a 4 x 4 factorial scheme, with three repetitions, corresponding to four water salinity (0.7; 1.4; 2.1 and 2.8 dS m-1) and four concentrations of hydrogen peroxide (0, 20, 40 and 60 µM). The different concentrations of hydrogen peroxide were applied by soaking the seed for a period of 24 h and spraying the leaves on the adaxial and abaxial sides. At 35 days after transplanting, the interaction between water salinity and hydrogen peroxide concentrations did not significantly interfere with plant physiology and growth, except for the number of leaves. The hydrogen peroxide did not cause significant effects on any of the evaluated plant variables. Increasing salinity of irrigation water led to reduction in gas exchanges at 61 and 96 days after transplanting. Water salinity inhibited the CO2 assimilation, transpiration, stomatal conductance, instantaneous carboxylation efficiency and stem diameter of passion fruit plants.

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Gas exchanges and production of colored cotton irrigated with saline water at different phenological stages

Revista Ciência Agronômica ◽

10.5935/1806-6690.20180027 ◽

2018 ◽

Vol 49 (2) ◽

Cited By ~ 1

Author(s):

Lauriane Almeida dos Anjos Soares ◽

Pedro Dantas Fernandes ◽

Geovani Soares de Lima ◽

Janivan Fernandes Suassuna ◽

Rennan Fernandes Pereira

Keyword(s):

Saline Water ◽

Phenological Stages ◽

Gas Exchanges ◽

Colored Cotton

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Growth and gas exchanges in soursop under irrigation with saline water and nitrogen sources

Revista Brasileira de Engenharia Agrícola e Ambiental ◽

10.1590/1807-1929/agriambi.v22n11p776-781 ◽

2018 ◽

Vol 22 (11) ◽

pp. 776-781 ◽

Cited By ~ 1

Author(s):

Evandro M. da Silva ◽

Geovani S. de Lima ◽

Hans R. Gheyi ◽

Reginaldo G. Nobre ◽

Francisco V. da S. Sá ◽

...

Keyword(s):

Saline Water ◽

Calcium Nitrate ◽

Nitrogen Sources ◽

Potassium Nitrate ◽

N Fertilization ◽

Water Salinity ◽

Gas Exchanges ◽

N Sources ◽

Salinity Levels ◽

The Individual

ABSTRACT Nitrogen (N) fertilization has been tested for the mitigation of salt stress in some species including fruit crops. However, special attention should be paid to the source of N, due to the different compositions and saline indices of the fertilizers, particularly when irrigation is conducted using waters with salinity levels that are restrictive to agriculture. Thus, this study evaluated the effect of fertilization with N sources on the growth and gas exchanges of soursop irrigated with saline water after transplanting. The experiment was carried out in greenhouse at the Center of Technology and Natural Resources of the Federal University of Campina Grande, and treatments were arranged in randomized blocks, in 4 x 4 factorial scheme, corresponding to electrical conductivity of water - 0.5, 1.1, 2.5 and 3.5 dS m-1, and the N sources urea, ammonia sulfate, calcium nitrate and potassium nitrate, with three replicates. Growth and gas exchanges of soursop at 110 days after transplanting were not influenced by either the interaction between water salinity and N sources or the individual action of N, but were inhibited by the increase in water salinity from 0.5 dS m-1. Increasing water salinity inhibited stomatal opening and carboxylation in the leaves.

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Water potential and gas exchanges in sugarcane irrigated with saline waters

Revista Brasileira de Engenharia Agrícola e Ambiental ◽

10.1590/1807-1929/agriambi.v22n10p679-682 ◽

2018 ◽

Vol 22 (10) ◽

pp. 679-682 ◽

Cited By ~ 2

Author(s):

Raquele M. de Lira ◽

Ênio F. de F. e Silva ◽

Marcone da S. Barros ◽

Leandro C. Gordin ◽

Lilia G. Willadino ◽

...

Keyword(s):

Stomatal Conductance ◽

Water Potential ◽

Irrigation Water ◽

Saline Water ◽

Gas Exchanges ◽

Randomized Design ◽

Irrigation Water Salinity ◽

Local Supply ◽

Salinity Levels ◽

Completely Randomized Design

ABSTRACT In Pernambuco, state in the northeastern region of Brazil, in the coastal areas, due to the intrusion of seawater, the waters used for sugarcane irrigation can have high salt contents and cause serious problems to soil and plant. The present study aimed to evaluate the effects of irrigation with saline water on the physiology of sugarcane, variety RB867515, irrigated under five salinity levels of 0.5; 2.0; 3.5; 5.0 and 6.5 dS m-1 in a completely randomized design, with four replicates in drainage lysimeters. The study was conducted in the period from December 2014 to June 2015, at the Federal Rural University of Pernambuco (UFRPE). Salinity levels were obtained by dissolving NaCl and CaCl2 in water from the local supply system (ECw = 0.5 dS m-1). Leaves were analyzed for stomatal conductance, transpiration and photosynthesis at 140, 229 and 320 days after planting (DAP) and for water potential at 137, 243 and 318 DAP. Increase in irrigation water salinity inhibited all variables at the respective plant ages and with greater intensity in the first evaluations (140 and 229 DAP) for stomatal conductance and transpiration. Photosynthesis and water potential showed the greatest linear reductions at the last data collection (320 and 318 DAP), respectively. Increase in salinity of irrigation water hampered water potential and gas exchange in the leaves of RB867515 sugarcane.

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