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

2018 ◽  
Vol 22 (11) ◽  
pp. 776-781 ◽  
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.

scholarly journals Photosynthetic Pigments and Photochemical Efficiency in Soursop under Saline Water Irrigation and Nitrogen Sources

2017 ◽  
Vol 9 (12) ◽  
pp. 325
Author(s):  
Evandro M. da Silva ◽  
Geovani S. de Lima ◽  
Hans R. Gheyi ◽  
Reginaldo G. Nobre ◽  
Francisco Vanies Da Silva Sá ◽  
...  
Keyword(s):  
Photosynthetic Pigments ◽  
Saline Water ◽  
Block Design ◽  
Photochemical Efficiency ◽  
Calcium Nitrate ◽  
Nitrogen Sources ◽  
Potassium Nitrate ◽  
Water Salinity ◽  
Saline Stress ◽  
Four Levels

The Studies have shown that nitrogen fertilization can mitigate the effects of saline stress on plants, however, the efficiency may vary according to the source of nitrogen used, specifically on the photosynthetic activity. In this context, the objective of this work was to evaluate the effect of different nitrogen sources on photosynthetic pigments and photochemical efficiency in soursop plants irrigated with distinct salinities. A randomized complete block design was used in a 4 × 4 factorial scheme, with the treatments corresponding to four levels of irrigation water salinity - ECw (0.5, 1.5, 2.5 and 3.5 dS m-1) and four sources of nitrogen (urea, ammonium sulfate, calcium nitrate and potassium nitrate), with three replications. The irrigation with saline water from 0.5 dS m-1 inhibits the concentration of photosynthetic pigments and promotes damages in the photochemical efficiency of photosynthesis at 110 days after transplanting. The different sources of nitrogen do not cause changes in the levels of photosynthetic pigments, however, the fertilization with potassium nitrate mitigates the effect of saline stress on the photochemical efficiency, mainly in the water salinity of 3.5 dS m-1.

scholarly journals Water Relations and Gas Exchanges of West Indian Cherry under Salt Stress and Nitrogen and Phosphorus Doses

2017 ◽  
Vol 9 (10) ◽  
pp. 168 ◽  
Author(s):  
Francisco V. da S. Sá ◽  
Hans R. Gheyi ◽  
Geovani S. de Lima ◽  
Emanoela P. de Paiva ◽  
Pedro D. Fernandes ◽  
...  
Keyword(s):  
Chlorophyll A ◽  
Water Relations ◽  
Irrigation Water ◽  
Chlorophyll A Fluorescence ◽  
Saline Water ◽  
Block Design ◽  
West Indian ◽  
N Fertilization ◽  
Nitrogen And Phosphorus ◽  
Gas Exchanges

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.

scholarly journals Gas exchanges and growth of cotton cultivars under water salinity

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.

scholarly journals Morphophysiology of guava under saline water irrigation and nitrogen fertilization

2018 ◽  
Vol 22 (1) ◽  
pp. 32-37 ◽  
Author(s):  
Idelfonso L. Bezerra ◽  
Reginaldo G. Nobre ◽  
Hans R. Gheyi ◽  
Leandro de P. Souza ◽  
Francisco W. A. Pinheiro ◽  
...  
Keyword(s):  
Leaf Area ◽  
Irrigation Water ◽  
Saline Water ◽  
Block Design ◽  
N Fertilization ◽  
Water Salinity ◽  
Randomized Block Design ◽  
Irrigation Water Salinity ◽  
N Dose ◽  
Number Of Leaves

ABSTRACT The aim of this study was to evaluate the growth of grafted guava cv. ‘Paluma’ subjected to different concentrations of salts in irrigation water and nitrogen (N) fertilization. The plants were transplanted to 150 L lysimeters and under field conditions at the Science and Agri-food Technology Center of the Federal University of Campina Grande, in the municipality of Pombal - PB. The experiment was conducted in randomized block design in a 5 x 4 factorial scheme, with three replicates, and the treatments corresponded to five levels of electrical conductivity of irrigation water - ECw (0.3; 1.1; 1.9; 2.7 and 3.5 dS m-1) and four N doses (70, 100, 130 and 160% of the N dose recommended for the crop). The doses equivalent to 100% corresponded to 541.1 mg of N dm-3 of soil. Irrigation water salinity above 0.3 dS m-1 negatively affects the number of leaves, leaf area, stem diameter, dry phytomass of leaves, branches and shoots . A significant interaction between irrigation water salinity and N fertilization was observed only for the number of leaves and leaf area at 120 days after transplanting. N dose above 70% of the recommendation (378.7 mg N dm-3 soil) did not mitigate the deleterious effects caused by salt stress on plant growth.

scholarly journals Saline water irrigation managements on growth of ornamental plants

2017 ◽  
Vol 21 (11) ◽  
pp. 739-745
Author(s):  
Francisco I. F. Oliveira ◽  
Wiliana J. F. de Medeiros ◽  
Claudivan F. de Lacerda ◽  
Antônia L. R. Neves ◽  
Davi R. Oliveira
Keyword(s):  
Saline Water ◽  
Leaf Growth ◽  
Ornamental Plants ◽  
Sprinkler Irrigation ◽  
Water Salinity ◽  
Water Application ◽  
Salinity Levels ◽  
Ixora Coccinea ◽  
Ideal Method ◽  
Ornamental Species

ABSTRACT Biosaline agriculture is an option for using waters with lower quality. Thus, the objective of this study was to evaluate the growth of ornamental species under irrigation with increasing water salinity levels in two methods of water application. The study was conducted in a greenhouse, in the municipality of Fortaleza, Ceará, Brazil. The treatments were distributed in randomized blocks in split plots, with six levels of water salinity in the plots (0.6 - control, 1.2, 1.8, 2.4, 3.0 and 3.6 dS m-1), two methods of water application in the subplots (localized and sprinkler irrigation) and four ornamental species in the sub-subplots (Catharanthus roseus, Allamanda cathartica, Ixora coccinea and Duranta erecta), with four replicates. Increase in irrigation water electrical conductivity reduced the growth of the studied ornamental species. It was not possible to establish an ideal method for irrigation of ornamental species. Effects of non-localized irrigation on leaf growth were more evident in the species C. roseus and D. erecta, which showed higher specific leaf area.

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

2019 ◽  
Vol 23 (12) ◽  
pp. 945-951 ◽  
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.

scholarly journals Water potential and gas exchanges in sugarcane irrigated with saline waters

2018 ◽  
Vol 22 (10) ◽  
pp. 679-682 ◽  
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.

scholarly journals Irrigation with saline water in soybean (Glycine max (L.) Merr.) in a soil with bovine biofertilizer

2018 ◽  
Vol 22 (9) ◽  
pp. 604-609 ◽  
Author(s):  
Geocleber G. de Sousa ◽  
Valdécio dos S. Rodrigues ◽  
Stallone da C. Soares ◽  
Ítalo N. Damasceno ◽  
Jamili N. Fiusa ◽  
...  
Keyword(s):  
Stomatal Conductance ◽  
Irrigation Water ◽  
Saline Water ◽  
Water Salinity ◽  
Saline Stress ◽  
Initial Growth ◽  
Gas Exchanges ◽  
Irrigation Water Salinity ◽  
Glycine Max L ◽  
Soybean Plants

ABSTRACT Salinity is a complex phenomenon that affects the metabolic processes of the plant, changing the physiological and biochemical parameters. In this context, the objective of this study was to evaluate the effect of irrigation water salinity on growth, biomass and gas exchanges in soybean crop in soil with and without biofertilizer. The experiment was carried out in a greenhouse at the experimental area of the Agrometeorological Station of the UFC, Fortaleza, CE, Brazil, from May to June 2016. The treatments were distributed in randomized blocks in a 5 × 2 factorial scheme, corresponding to the levels of irrigation water salinity: 0.8; 1.6; 2.4; 3.2 and 4.0 dS m-1, in soil without and with bovine biofertilizer, in five replicates. The following variables were evaluated: growth (plant height, number of leaves, stem diameter, and leaf area), biomass (leaf, root and total dry matter) and gas exchanges (photosynthesis, stomatal conductance and transpiration). Irrigation water salinity reduced photosynthesis, stomatal conductance and transpiration, but with less intensity in the plants that received bovine biofertilizer. The aerobically fermented bovine biofertilizer attenuates saline stress on the initial growth and biomass of soybean plants.

scholarly journals BIOMASS AND CHLOROPLAST PIGMENTS IN JACKFRUIT SEEDLINGS UNDER SALINE STRESS AND NITROGEN FERTILIZATION

2018 ◽  
Vol 31 (3) ◽  
pp. 622-631
Author(s):  
FRANCISCO ÍTALO FERNANDES DE OLIVEIRA ◽  
ANTÔNIO GUSTAVO DE LUNA SOUTO ◽  
LOURIVAL FERREIRA CAVALCANTE ◽  
WILIANA JÚLIA FERREIRA DE MEDEIROS ◽  
SHERLY APARECIDA DA SILVA MEDEIROS ◽  
...  
Keyword(s):  
Ammonium Sulfate ◽  
Nitrogen Fertilization ◽  
Saline Water ◽  
Nitrogen Sources ◽  
Nitrogen Fertilizers ◽  
Saline Stress ◽  
Chloroplast Pigments ◽  
Matter Production ◽  
Salinity Levels ◽  
Chlorophyll A And B

ABSTRACT Irrigation with saline water is a worldwide necessity an excess of salts in water or in soil causes growth inhibition, and negatively affects the productivity of many crops. Application of nitrogen fertilizers may be a way of mitigating the effects of salts on plants. The aim of this study was to evaluate the accumulation of biomass and the chlorophyll pigment content in jackfruit seedlings irrigated with water of increasing salinity level in soil with nitrogen sources. The treatments were distributed in randomized blocks with four replicates and three plants per plot, arranged in a 5 × 3 factorial scheme, related to electrical conductivity levels of the irrigation water of 0.3, 1.0, 2.0, 3.0 and 4.0 dS m-1, in soil without nitrogen, with ammonium sulfate and with urea, in a split application 60 and 75 days after sowing. An increase in the salinity of the water increased the salinity levels of soil, which was intensified by a dose of 150 mg of N, mainly when applied in the form of ammonium sulfate, inhibiting dry matter production and chlorophyll content in jackfruit seedlings. The greatest reductions in chlorophyll a and b content occurred in jackfruit seedlings irrigated with water of 4.0 dS m-1 conductivity in the soil without nitrogen fertilization. Urea is the most suitable nitrogen source for the production of seedlings under conditions of high salinity.

scholarly journals Physiological Indicators in Two Lettuce Cultivars Under Saline Stress

2021 ◽  
Vol 13 (4) ◽  
pp. 52
Author(s):  
Marcos Antonio Dantas de Oliveira ◽  
Paulo Torres Carneiro ◽  
Maria Claudjane Jerônimo Leite Alves ◽  
Thayse Valéria e Silva ◽  
Gilberto da Cruz Gouveia Neto ◽  
...  
Keyword(s):  
Stomatal Conductance ◽  
Saline Water ◽  
Net Photosynthesis ◽  
Water Salinity ◽  
Saline Stress ◽  
Physiological Indicators ◽  
Osmotic Effect ◽  
Randomized Design ◽  
Salinity Levels ◽  
Green Index

Lettuce (Lactuca sativa L.) is considered as the main leafy vegetable in Brazil. In the last decades, there had been many changes in the predominant varietal types in the country, however, issues regarding the use of saline water inhibit the growth by the osmotic effect. The aim of this study is avaliate the effect of water salinity on physiological in lettuce cultivars. The experiment was carried out at the Alagoas Federal University, Arapiraca Campus, in a completely randomized design and with a 5 × 2 factorial scheme, with six replications. Five treatments of water salinity levels were analyzed (ECw: 0.14, 1.54, 2.94, 4.34, and 5.74 dS m-1 at 25 °C) in two types of lettuce crops (Saia Véia and Vitoria Verdinha). Stomatal conductance, net photosynthesis, transpiration rate, water use efficiency, leaf temperature, and green index were assessed at 10, 20, and 30 days after the application of the treatments. The saline stress caused by the increase in saline concentrations decreased the photosynthesis and transpiration rates, which were associated with the reduction of stomatal conductance in both cultivars. Nevertheless, Saia Véia cultivar was higher tolerance in all tested saline levels compared to Vitória Verdinha. The green index for Vitoria Verdinha was seven times higher when compared to Saia Véia from the lowest to the highest saline levels. The cultivars differ in salt sensitivity, which could be useful for producers to choose the cultivar that is most adapted to the region and breeders regarding improvement prospects for adaptation of the lettuce under saline stress. In addition to osmotic stress, which is the first to happen, there are others.

Sign in / Sign up

Export Citation Format

Share Document