scholarly journals PRODUTIVIDADE DA CULTURA DO AMENDOIM SOB DIFERENTES SUPRESSÕES DA IRRIGAÇÃO COM ÁGUA SALINA

Irriga ◽  
2021 ◽  
Vol 26 (2) ◽  
pp. 210-220
Author(s):  
Geovana Ferreira Goes ◽  
Geocleber Gomes de Sousa ◽  
Samuel de Oliveira Santos ◽  
Francisco Barroso da Silva Júnior ◽  
Emanuel D'Araújo Ribeiro de Ceita ◽  
...  
Keyword(s):  
Water Deficit ◽  
Arachis Hypogaea ◽  
Saline Water ◽  
Salt Water ◽  
Water Suppression ◽  
Saline Stress ◽  
High Salinity Water ◽  
Arachis Hypogaea L ◽  
Salinity Water ◽  
E Mail

PRODUTIVIDADE DA CULTURA DO AMENDOIM SOB DIFERENTES SUPRESSÕES DA IRRIGAÇÃO COM ÁGUA SALINA     GEOVANA FERREIRA GOES1; GEOCLEBER GOMES DE SOUSA2; SAMUEL DE OLIVEIRA SANTOS1; FRANCISCO BARROSO DA SILVA JUNIOR3; EMANUEL D’ ARAÚJO RIBEIRO DE CEITA4 E KELLY NASCIMENTO LEITE5   1 Graduandos no curso de Agronomia da Universidade da Integração Internacional da Lusofonia Afro-Brasileira (Avenida da Abolição, 3, centro, 62.790-000, Redenção/Ce, Brasil). E-mails: [email protected]; [email protected]. 2 Prof. Doutor, Instituto de Desenvolvimento Rural, Universidade da Integração Internacional da Lusofonia Afro-Brasileira (Avenida da Abolição, 3, centro, 62.790-000, Redenção/Ce, Brasil). E-mail:[email protected]. 3Mestrando pelo Programa de Pós-graduação em Ciência do Solo da Universidade Federal do Ceará, Campus do Pici (Avenida Mister Hull, 2977, Pici, 60.021-970, Fortaleza/Ce, Brasil) Email: [email protected]. 4Mestrando pelo Programa de Pós-graduação em Agronomia (Ciência do Solo) da Faculdade de Ciências Agrárias e Veterinárias (Rua: Prof. Paulo Donato Castellane, SN, 14.004-900, Jaboticabal/SP, Brasil)  E-mail: [email protected]. 5Prof. Doutora, Centro Multidisciplinar da Universidade Federal do Acre, Campus Floresta (Rua Estrada da Canela Fina, KM 12 Gleba Formoso - São Francisco, 69.895-000, Cruzeiro do Sul/AC). E-mail: [email protected].     1 RESUMO   O déficit hídrico associada ao estresse salino afetam a produtividade das culturas agrícolas. Objetivou-se avaliar a produtividade da cultura de amendoim irrigado com água de baixa e alta salinidade submetida a diferentes intervalos de supressão. O experimento foi conduzido em condições de campo, no período de agosto a outubro de 2019 na Fazenda Experimental de Piroás, Redenção-CE. O delineamento experimental utilizado foi o de blocos ao acaso em arranjo fatorial, sendo o primeiro fator a salinidade das águas de irrigação (1,0 e 4,0 dS m-¹) e o segundo fator, quatro intervalos de supressões (IS1= 40 a 55 DAS; IS2 = 55 a 70 DAS; IS3 = 70 a 85 DAS e IS4 = sem intervalos de supressão), com quatro repetições. Foram avaliadas as seguintes variáveis: número, massa, comprimento e diâmetro de vagem e a produtividade. O tratamento sem intervalo de supressão hídrica associado a água de menor salinidade proporcionam maior número e diâmetro de vagem.  A água de maior salinidade afeta a massa e comprimento de vagem. A utilização da água de maior ou menor salinidade sem intervalo de supressão da irrigação proporciona maior produtividade da cultura do amendoim.   PALAVRAS CHAVES: Arachis hypogaea L., déficit hídrico, estresse salino     GOES, G. F.; SOUSA, G. G.; SANTOS, S. O.; SILVA JUNIOR, F. B.; CEITA, E. A. R.; LEITE, K. N.PEANUT CULTURE YIELD UNDER DIFFERENT SALT WATER IRRIGATION SUPPRESSIONS    2 ABSTRACT  The water deficit associated with salt stress affects the productivity of agricultural crops. The objective was to evaluate the productivity of peanut culture irrigated with low and high salinity water submitted to different suppression intervals. The experiment was conducted under field conditions, from August to October 2019 at the Experimental Farm of Piroás, Redenção-CE. The experimental design used for the randomized blocks in a factorial arrangement, with the first factor is the salinity of the irrigation water (1.0 and 4.0 dS m-¹) and the second factor, four suppression intervals (IS1 = 40 a 55 DAS; IS2 = 55 to 70 DAS; IS3 = 70 to 85 DAS and IS4 = without suppression intervals), with four repetitions. The following variables were evaluated: number, mass, pod length and diameter and yield. Treatment without water suppression interval associated with less saline water provides a greater number and diameter of pods. Higher salinity water affects pod mass and length. The use of water of greater or lesser salinity without interval of suppression of irrigation offers the highest yield of the peanut culture.  Keywords: Arachis hypogaea L., water déficit, saline stress.

scholarly journals MORFOFISIOLOGIA DE GENÓTIPOS DE GERGELIM SUBMETIDOS A DIFERENTES ESTRATÉGIAS DE USO DE ÁGUA SALINA

Irriga ◽  
2021 ◽  
Vol 1 (1) ◽  
pp. 42-55
Author(s):  
André Alisson Rodrigues da Silva ◽  
Cassiano Nogueira de Lacerda ◽  
Geovani Soares de Lima ◽  
Lauriane Almeida dos Anjos Soares ◽  
Hans Raj Gheyi ◽  
...  
Keyword(s):  
High Salinity ◽  
Saline Water ◽  
Block Design ◽  
Co2 Assimilation ◽  
Sesamum Indicum ◽  
Saline Stress ◽  
High Salinity Water ◽  
Flowering Phase ◽  
Salinity Water ◽  
Sesame Genotypes

MORFOFISIOLOGIA DE GENÓTIPOS DE GERGELIM SUBMETIDOS A DIFERENTES ESTRATÉGIAS DE USO DE ÁGUA SALINA     ANDRÉ ALISSON RODRIGUES DA SILVA1; CASSIANO NOGUEIRA DE LACERDA1; GEOVANI SOARES DE LIMA1; LAURIANE ALMEIDA DOS ANJOS SOARES1; HANS RAJ GHEYI1 E PEDRO DANTAS FERNANDES1   1 Unidade Acadêmica de Engenharia Agrícola, Universidade Federal de Campina Grande, UFCG, Rua Aprígio Veloso, 882 - Universitário, Campina Grande, PB. E-mail: [email protected]; [email protected]; [email protected]; [email protected]; [email protected]; [email protected].     1 RESUMO   Objetivou-se com este trabalho avaliar as trocas gasosas e o acúmulo de fitomassas de genótipos de gergelim sob estratégias de uso de águas salinas. A pesquisa foi conduzida em casa de vegetação, em delineamento de blocos casualizados em arranjo fatorial 6 x 2, sendo seis estratégias de uso de águas salinas aplicadas nas diferentes fases fenológicas das plantas (SE-irrigação com água de baixa salinidade durante todo ciclo de cultivo; VE - irrigação com água de alta salinidade na fase vegetativa; FL - na fase de floração; FR na fase de frutificação; VE/FL - nas fases vegetativa/floração; VE/FR - nas fases vegetativa/frutificação) e dois genótipos de gergelim (BRS Seda e BRS Anahí), com quatro repetições. Foram aplicadas água com alta salinidade (2,7 dS m-1), em alternância com água com baixa concentração de sais (0,3 dS m-1), em fases diferentes do ciclo. A irrigação com água de 2,7 dS m-1 durante a fase de floração, e nas fases vegetativa/floração, não comprometeu a condutância estomática, transpiração e taxa de assimilação de CO2 dos genótipos de gergelim. A salinidade da água de 2,7 dS m-1 quando aplicada nas fases vegetativa/floração prejudicou o acúmulo de fitomassa pelas plantas de gergelim.   Palavras-chave: estresse salino, Sesamum indicum L., qualidade de água.     SILVA, A, A, R. da; LACERDA, C. N. de; LIMA, G. S. de; SOARES, L. A. dos A.; GHEYI, H. R.; FERNANDES, P.D. MORPHOPHYSIOLOGY OF SESAME GENOTYPES SUBMITTED TO DIFFERENT STRATEGIES FOR THE USE OF SALINE WATER     2 ABSTRACT   The objective of this study was to evaluate gas exchange and phytomass accumulation of sesame genotypes under different strategies for the use of saline water. The research was conducted in a greenhouse, in a randomized block design in a 6 x 2 factorial arrangement, with six strategies for the use of saline water applied in the different phenological phases of the plants (SE - irrigation with low salinity water throughout the cultivation cycle; VE - irrigation with high salinity water in the vegetative phase; FL - in the flowering phase; FR - in the fruiting phase; VE/FL - in the vegetative/flowering phase; VE/FR - in the phases vegetative/fruiting) and two sesame genotypes (BRS Seda and BRS Anahí), with four replicates. Water with high salinity (2.7 dS m-1) was used, alternating with water with low salt concentration (0.3 dS m-1), at different stages of the crop cycle. Irrigation with water of 2.7 dS m-1 during the flowering phase, and in the vegetative/flowering phases, did not compromise the stomatal conductance, transpiration and CO2 assimilation rate of sesame genotypes. The water salinity of 2.7 dS m-1 applied in the vegetative/flowering phases impaired the accumulation of phytomass by sesame plants.   Keywords: saline stress, Sesamum indicum L., water quality.  

scholarly journals IRRIGAÇÃO COM ÁGUA SALINA E USO DE SUBSTRATOS NA CULTURA DO FEIJÃO-CAUPI

Nativa ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 86-91
Author(s):  
Bruno Eduardo Lopes Sousa ◽  
Geocleber Gomes de Sousa ◽  
Andreza de Melo Mendonça ◽  
Max Ferreira dos Santos ◽  
Francisco Barroso da Silva Junior ◽  
...  
Keyword(s):  
Rice Husk ◽  
Vigna Unguiculata ◽  
Saline Water ◽  
Saline Stress ◽  
Initial Growth ◽  
Mineral Fertilization ◽  
High Salinity Water ◽  
Salinity Water ◽  
Number Of Leaves ◽  
Bean Crop

Objetivou-se avaliar a interação entre diferentes níveis salinos e substratos sob o crescimento inicial, o acúmulo de biomassa e as trocas gasosas da cultura do feijão-caupi. O experimento foi conduzido na área experimental da Universidade Federal do Ceará, Fortaleza, Ceará. O delineamento utilizado foi inteiramente casualizado em esquema fatorial (5 x 2), com quatro repetições. Os tratamentos foram constituídos por substratos inseridos ao solo (T1- biocarvão + solo na proporção 1:1; T2- solo (testemunha); T3- adubação mineral; T4- casca de arroz carbonizada + carnaúba + solo na proporção 2:1:1 e S5- casca de arroz carbonizada + solo na proporção 1:1), e duas águas de irrigação (1,0 e 4,0 dS m-1). Aos 40 dias após a semeadura (DAS) foram avaliados: número de folhas (NF), altura de planta (AP), diâmetro do caule (DC), área foliar (AF), massa seca da parte aérea (MSPA) e total (MST), fotossíntese (A), transpiração (E) e condutância estomática (gs). A água de alta salinidade afetou negativamente a AP, DC, MSPA e a gs das plantas. Os tratamentos T4 e T5 promoveram maior NF e A quando combinado com água não salina. Os tratamentos T4 e T5 proporcionaram maiores valores de gs e E. Palavras-chave: Vigna unguiculata L. Walp; salinidade; adubação.   Influence of saline stress and fertilizers on caupi bean crop   ABSTRACT: The objective was to evaluate the effects of salt stress on the initial growth, on the accumulation of biomass and on the gas exchange of the cowpea culture submitted to different substrates. The experiment was conducted in the experimental area of the Federal University of Ceará, Fortaleza, Ceará. The design used was completely randomized in a factorial scheme (5 x 2), with four replications. The treatments consisted of substrates inserted in the soil (T1- biochar + soil in the proportion 1: 1; T2- soil (control); T3- mineral fertilization; T4- carbonized rice husk + carnauba + soil in the proportion 2: 1: 1 and S5- carbonized rice husk + soil in a 1: 1 ratio), and two irrigation waters (1.0 and 4.0 dS m-1). At 40 days after sowing (DAS), the following were evaluated: number of leaves (NF), plant height (AP), stem diameter (DC), leaf area (AF), shoot dry matter (MSPA) and total (MST), photosynthesis (A), transpiration (E) and stomatal conductance (gs). High salinity water negatively affected AP, DC, MSPA and plant gas. The treatments T4 and T5 promoted greater NF and A when combined with non-saline water. The treatments T4 and T5 provided higher values of gs and E. Keywords: Vigna unguiculata L. Walp; salinity; fertilization.

scholarly journals USO DE COBERTURA MORTA E ÁGUA SALINA NA PRODUTIVIDADE DA CULTURA DO MILHO

Irriga ◽  
2021 ◽  
Vol 1 (4) ◽  
pp. 730-738
Author(s):  
Geovana Ferreira Goes ◽  
Geocleber Gomes de Sousa ◽  
Carla Ingryd Nojosa Lessa ◽  
Fred Denílson Barbosa da Silva ◽  
Claudivan Feitosa de Lacerda ◽  
...  
Keyword(s):  
Zea Mays ◽  
Irrigation Water ◽  
Zea Mays L ◽  
Saline Water ◽  
Soil Protection ◽  
High Salinity Water ◽  
Low Salinity ◽  
Corn Crop ◽  
Salinity Water ◽  
E Mail

USO DE COBERTURA MORTA E ÁGUA SALINA NA PRODUTIVIDADE DA CULTURA DO MILHO     GEOVANA FERREIRA GOES1, GEOCLEBER GOMES DE SOUSA2, CARLA INGRYD NOJOSA LESSA3, FRED DENILSON BARBOSA DA SILVA2, CLAUDIVAN FEITOSA DE LACERDA4, RAFAELLA DA SILVA NOGUEIRA2   1Graduanda no curso de Agronomia da Universidade da Integração Internacional da Lusofonia Afro-Brasileira (Avenida da Abolição, 3, centro, 62.790-000, Redenção/Ce, Brasil). E-mail: [email protected] 2Professores Doutores, Instituto de Desenvolvimento Rural, Agronomia da Universidade da Integração Internacional da Lusofonia Afro-Brasileira (Avenida da Abolição, 3, centro, 62.790-000, Redenção/Ce, Brasil). E-mail: [email protected]; [email protected]; [email protected] 3Mestranda pelo Programa de Pós-graduação em Engenharia Agrícola da Universidade Federal do Ceará, Campus do Pici (Avenida Mister Hull,2977, Pici, 60.021-970, Fortaleza/Ce, Brasil) Email: [email protected] 4Professor Doutor, DENA/Programa de Pós-graduação em Engenharia Agrícola da Universidade Federal do Ceará, Campus do Pici (Avenida Mister Hull,2977, Pici, 60.021-970, Fortaleza/Ce, Brasil) Email: [email protected]   1 RESUMO   O objetivo do trabalho foi avaliar a produtividade da cultura do milho irrigado com água de maior e menor salinidade em solo com e sem cobertura morta vegetal. A pesquisa foi realizada em campo, na Fazenda experimental da UNILAB, Redenção-CE. O delineamento experimental foi em bloco casualizado, em esquema fatorial 6 × 2, referente a seis estratégias de uso de cobertura morta vegetal: EC1= sem cobertura morta durante todo o ciclo - testemunha; EC2= com cobertura morta durante todo o ciclo; EC3= com cobertura morta até 45 dias após a semeadura (DAS) e sem cobertura morta até o final do ciclo; EC4= sem cobertura morta até aos 45 DAS e com cobertura morta até o final do ciclo; EC5= com cobertura morta até 60 DAS e sem cobertura morta até o final do ciclo e EC6= sem cobertura morta até 60 e com cobertura morta até o final do ciclo e duas condutividade elétrica da água de irrigação (A1=0,8 dS m-1 e A2=3,0 dS m-1), em cinco repetições. Foram analisadas as seguintes variáveis: massa de espiga com e sem palha, de 1000 grãos e a produtividade. O uso da estratégia EC3 possibilitou aumento para massa da espiga com e sem palha e 1000 grãos. A salinidade da água de irrigação foi atenuada pela estratégia EC3 para massa da espiga com e sem palha. As estratégias EC3 e EC5 apresentaram maior produtividade com água de baixa salinidade e com água de maior salinidade quando utilizou-se a estratégia EC3.   Palavras-chave: salinidade, proteção do solo, Zea mays L.   GOES, G. F.; SOUSA, G. G.; LESSA, C. I. N; SILVA, F. D. B; LACERDA, C. F.; NOGUEIRA, R. S. USE OF DEAD COVERAGE AND SALINE WATER IN THE PRODUCTIVITY OF CORN CROP        2 ABSTRACT  This work aimed to evaluate the productivity of the corn crop irrigated with water of greater and lesser salinity in soils with and without mulch. The research was carried out in the field, at the experimental farm at UNILAB, Redenção-CE. The experimental design was a randomized block, in a 6 × 2 factorial scheme, referring to six strategies for using vegetable mulch: EC1= no mulch throughout the cycle - control; EC2= with mulch throughout the cycle; EC3= with mulch up to 45 days after sowing (DAS) and without mulch until the end of the cycle; EC4= no mulch up to 45 DAS and with mulch until the end of the cycle; EC5= with mulch up to 60 DAS and without mulch until the end of the cycle and EC6= without mulch up to 60 and with mulch until the end of the cycle and two electrical conductivity of the irrigation water (A1=0.8 dS m-1 and A2=3.0 dS m-1) in five repetitions. The following variables were analyzed: ear mass with and without straw, 1000 grains and yield. The use of the EC3 strategy allowed an increase in ear mass with and without straw and 1000 grains. The salinity of the irrigation water was attenuated by the EC3 strategy for ear mass with and without straw. Strategies EC3 and EC5 showed higher yields with low salinity water and high salinity water when the EC3 strategy was used.   Keywords: salinity, soil protection, Zea mays L. 

scholarly journals ÁGUA SALINA E ADUBAÇÃO FOSFATADA NA CULTURA DO AMENDOIM

Irriga ◽  
2022 ◽  
Vol 1 (4) ◽  
pp. 704-713
Author(s):  
José Marcelo da Silva Guilherme ◽  
Geocleber Gomes de Sousa ◽  
Samuel de Oliveira Santos ◽  
Krishna Ribeiro Gomes ◽  
Thales Vinicius de Araújo Viana
Keyword(s):  
Salt Stress ◽  
Arachis Hypogaea ◽  
Saline Water ◽  
Phosphorus Fertilization ◽  
Phenological Stages ◽  
Vegetative Phase ◽  
Arachis Hypogaea L ◽  
Phosphate Fertilization ◽  
The University ◽  
E Mail

ÁGUA SALINA E ADUBAÇÃO FOSFATADA NA CULTURA DO AMENDOIM     JOSÉ MARCELO DA SILVA GUILHERME1; GEOCLEBER GOMES DE SOUSA2; SAMUEL DE OLIVEIRA SANTOS3; KRISHNA RIBEIRO GOMES4; THALES VINICIUS DE ARAÚJO VIANA5   1 Mestrando pelo programa de pós graduação em engenharia agrícola da Universidade Federal do Ceará, Campus do Pici (Av. Mister Hull, 2977, Pici, 60.021-970, Fortaleza, Ceará, Brasil). E-mail: [email protected] 2Professor Doutor, Instituto de Desenvolvimento Rural, Universidade da Integração Internacional da Lusofonia Afro-Brasileira (Avenida da abolição, 3, Centro, 62.790-000, Redenção, Ceará, Brasil). E-mail: [email protected] 3 Discente no curso de agronomia da Universidade da Integração Internacional da Lusofonia Afro-Brasileira (Avenida da abolição, 3, Centro, 62.790-000, Redenção, Ceará, Brasil). E-mail: [email protected] 4 Pós doutoranda em engenharia agrícola da Universidade Federal do Ceará, Campus do Pici (Av. Mister Hull, 2977, Pici, 60.021-970, Fortaleza, Ceará, Brasil). E-mail: [email protected] 5 Professor Doutor, Departamento de engenharia agrícola da Universidade Federal do Ceará, Campus do Pici, (Av. Mister Hull, 2977, Pici, 60.021-970, Fortaleza, Ceará, Brasil). E-mail: [email protected]     1 RESUMO   A adubação fosfata poderá mitigar o estresse salino em plantas de amendoim. Diante deste contexto, o objetivo deste trabalho foi avaliar o uso de água salina em diversos estágios fenológicos na produtividade da cultura do amendoim cultivado sob adubação fosfatada. O experimento foi realizado na área experimental da Unidade de Produção de Mudas Auroras, da Universidade da Integração da Lusofonia Afro-Brasileira, Redenção, CE. O delineamento experimental foi inteiramente casualizado, em esquema fatorial 6x2, com 5 repetições, sendo utilizadas seis estratégias de irrigação com água salina com condutividade elétrica de 4,0 dS m-1 aplicadas em diferentes estágios fenológicos da cultura: estresse salino na fase vegetativa (E1); na fase de florescimento (E2); no aparecimento do ginóforo (E3); na frutificação/formação de vagem (E4); no estágio final da floração (E5); sem estresse salino (E6) e duas doses de fósforo 3,1 e 6,2 g vaso-1, correspondendo a 50% e 100% da dose recomendada. As variáveis analisadas foram: vagens formadas, vagens mal formadas, número total de vagens por planta, comprimento de vagem, diâmetro de vagem, massa de vagens e a produtividade. O uso de água de maior salinidade na fase vegetativa evidencia menor diâmetro de vagem.   Palavras-chave: Arachis Hypogaea L.; Estresse Salino; Nutrição de plantas.     GUILHERME, J.M.S; SOUSA, G.G; SANTOS, S.O; GOMES, K.R; VIANA, T.V.A. SALINE WATER AND PHOSPHATE FERTILIZATION IN PEANUT CROPS           2 ABSTRACT   Phosphate fertilization can mitigate salt stress in peanut plants. In this context, this work aimed to evaluate the use of saline water at different phenological stages in the productivity of peanuts cultivated under phosphorus fertilization. The experiment was carried out in the experimental area of ​​the Aurora Seedling Production Unit, at the University of Integration of Lusofonia Afro-Brasileira, Redenção, CE. The experimental design was completely randomized, in a 6x2 factorial scheme, with 5 replications, using six irrigation strategies with saline water with electrical conductivity of 4.0 dS m-1 applied at different phenological stages of the crop: salt stress in the vegetative phase (E1); in the flowering stage (E2); in the appearance of the gynophore (E3); in fruiting/pod formation (E4); in the final stage of flowering (E5); without salt stress (E6) and two doses of phosphorus 3.1 and 6.2 g pot-1, corresponding to 50% and 100% of the recommended dose. The variables analyzed were formed pods, malformed pods, total number of pods per plant, pod length, pod diameter, pod mass and productivity. The use of water with greater salinity in the vegetative phase shows a smaller pod diameter.   Keywords: Arachis hypogaea L., Salt stress, Plant nutrition.

scholarly journals Salt tolerant acrylamide-based quenched polyampholytes for polymer flooding

2020 ◽  
Vol 100 (4) ◽  
pp. 119-127
Author(s):  
N. Mukhametgazy ◽  
◽  
I.Sh. Gussenov ◽  
A.V. Shakhvorostov ◽  
S.E. Kudaibergenov ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Saline Water ◽  
Core Sample ◽  
Polymer Flooding ◽  
Trimethylammonium Chloride ◽  
Salt Tolerant ◽  
High Salinity Water ◽  
Cationic Monomer ◽  
Aqueous Salt Solutions ◽  
Salinity Water

In our previous papers [1, 2] we considered the behavior of linear and crosslinked polyampholytes based on fully charged anionic monomer — 2-acrylamido-2-methyl-1-propanesulfonic acid sodium salt (AMPS) and cationic monomer — (3-acrylamidopropyl)trimethylammonium chloride (APTAC) in aqueous-salt solutions, swelling and mechanical properties. In the present paper we report the applicability of salt tolerant amphoter-ic terpolymers composed of AMPS, APTAC and acrylamide (AAm) in enhanced oil recovery (EOR). The amphoteric terpolymers of different compositions, particularly [AAm]:[AMPS]:[APTAC] = 50:25:25; 60:20:20; 70:15:15; 80:10:10 and 90:5:5 mol.% were prepared by free-radical polymerization, identified and their viscosifying ability with respect to reservoir saline water (salinity is 163 g⋅L-1) at 60 °C was tested. It was found that due to polyampholytic nature, the AAm-AMPS-APTAC terpolymers exhibited improved viscosifying behavior at high salinity water. As a result, the appropriate salt tolerant sample [AAm]:[AMPS]:[APTAC] = 80:10:10 mol.% was selected for polymer flooding experiments. Polymer flood-ing experiments on high permeable sand pack model demonstrated that only 0.5 % oil was recovered by am-photeric terpolymer. While injection of polyampholyte solution into preliminarily water flooded core sample resulted in the increase of oil recovery up to 4.8–5 %. These results show that under certain conditions the amphoteric terpolymers have a decent oil displacement ability.

scholarly journals Growth and gas exchange of corn under salt stress and nitrogen doses

2021 ◽  
Vol 25 (3) ◽  
pp. 174-181
Author(s):  
Henderson C. Sousa ◽  
Geocleber G. de Sousa ◽  
Carla I. N. Lessa ◽  
Antonio F. da S. Lima ◽  
Rute M. R. Ribeiro ◽  
...  
Keyword(s):  
Stomatal Conductance ◽  
Gas Exchange ◽  
Leaf Area ◽  
Plant Height ◽  
Saline Water ◽  
Saline Stress ◽  
Low Salinity ◽  
Salinity Water ◽  
Hybrid Maize ◽  
The University

ABSTRACT The excess of salts can affect several processes in the crops, and nitrogen (N) can attenuate the depressive effect of salinity. The objective was to evaluate the influence of nitrogen doses on the growth and gas exchange of corn crop irrigated with saline water. The experiment was conducted from June to September 2019 at the University of International Integration of Afro-Brazilian Lusophony, Redenção, CE, Brazil. The experimental design was completely randomized, in a 2 x 3 factorial scheme (supply water of 0.3 dS m-1 and saline solution of 3.0 dS m-1) and three nitrogen doses, 0, 80, and 160 kg ha-1, corresponding to 0, 50, and 100% of the recommended dose respectively, with six repetitions. At 30 and 45 days after sowing (DAS), plant height, leaf area, number of leaves, photosynthesis, transpiration, and stomatal conductance were evaluated. Saline stress affects plant height, leaf area, photosynthesis, transpiration, and conductance at 30 DAS. The doses of 80 and 160 kg ha-1 provide greater performance in plant height, leaf area, photosynthesis, transpiration, and conductance at 30 DAS. The use of low salinity water and doses of 80 and 160 kg ha-1 were more efficient in terms of plant height, leaf area, photosynthesis, transpiration, and conductance at 45 DAS. The dose of 160 kg ha-1 of N attenuates the harmful effects of salts in AG 1051 hybrid maize plants, providing higher values of photosynthesis, transpiration, and stomatal conductance at 45 DAS when irrigated with water of 3.0 dS m-1.

Measurements of assimilable organic carbon (AOC) in high saline conditions using P17

2013 ◽  
Vol 13 (2) ◽  
pp. 265-272
Author(s):  
Eunjeong Mun ◽  
Sangyoup Lee ◽  
Inhyuk Kim ◽  
Boksoon Kwon ◽  
Heedueng Park ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Water Samples ◽  
High Salinity ◽  
Saline Water ◽  
Assay Method ◽  
Acetate Concentration ◽  
Cell Production ◽  
High Salinity Water ◽  
Assimilable Organic Carbon ◽  
Salinity Water

Biofouling caused by the deposition or growth of microorganisms on the membrane surface is one of the major concerns in nanofiltration (NF) and reverse osmosis (RO) processes. Assimilable organic carbon (AOC) has been a useful index to assess the growth potential of bacteria. In the case of drinking water, the AOC assay method has been widely applied to estimate growth or regrowth potential of bacteria in distribution and storage systems. However, studies on AOC measurement for high salinity water samples such as brackish water and seawater are rather scarce. The objective of this research is to investigate the influence of water salinity on the conventional AOC assay method. AOC samples with different salt concentrations were prepared by varying NaCl concentration from 0 to 35,000 mg/L, while the acetate concentration was held at 100 μg/L. The number of cells produced in water samples was measured by the heterotrophic plate count (HPC) method using R2A agar. The result showed that the cell production of Pseudomonas fluorescens strain P17 and Spirillum strain NOX decreased with increasing salinity. Especially, the growth of Spirillum strain NOX was noticeably influenced by water salinity. To further observe the relation between acetate concentration and cell production in high salinity water, organic-free saline water samples were prepared by spiking NaCl in deionized (DI) water. The organic-free saline water samples were enriched with acetate of which concentration was varied to be 0–1,000 μg/L (as acetate). Also, P. fluorescens strain P17 was adjusted to high total dissolved solids (TDS) condition prior to being injected into the saline water samples. The result demonstrated that the amount of microorganisms increased with increasing acetate concentration. Although AOC measurement of saline water using Spirillum strain NOX seemed unacceptable, it was suggested that P. fluorescens strain P17 has the possibility to be used in measuring AOC in saline water. Moreover, the yield factor was altered as a result of reflecting salinity impact as the growth number of P. fluorescens strain P17 was unstable with high saline condition.

The Effect of High Salinity Water to the Compressive Strength of Mine Backfill Material

2018 ◽  
Vol 777 ◽  
pp. 554-558
Author(s):  
Vu Hai Dang ◽  
Manoon Masniyom
Keyword(s):  
Compressive Strength ◽  
High Salinity ◽  
Saline Water ◽  
Salt Content ◽  
High Salt ◽  
Mine Backfill ◽  
High Salinity Water ◽  
Solid Ratio ◽  
High Salt Content ◽  
Salinity Water

The effect of the high salinity water on the compressive strength of mine backfill was studied. Two types of salinity water: saturated and unsaturated brines were employed to mix with mine backfill materials, and the results were compared. The one with saturated brine had high salt content of 400 g/l while the other had 200 g/l. The results showed that compressive strength decreased with increasing salt content. The mine backfill with high salt content (saturated brine) exhibited the poorest compressive strength in which its strength decreased to approximately 50-70 % of the original strength gained from the backfill samples based on water without salt. Additionally, the optimal saline water solid ratio was 0.2.

The Origin of Cold High-Salinity Water in Foxe Basin

1964 ◽  
Vol 21 (1) ◽  
pp. 45-55 ◽  
Author(s):  
N. J. Campbell
Keyword(s):  
High Salinity ◽  
Saline Water ◽  
Canadian Arctic ◽  
Cold Saline ◽  
High Salinity Water ◽  
Foxe Basin ◽  
Salinity Water

During the 1955 cruise of HMCS Labrador to the Canadian Arctic an unusual mass of cold saline water was discovered in Foxe Basin and Channel. Temperatures as low as −1.90 °C were observed in association with salinities of the order of 33.75 and 34.00‰.An explanation of the origin of this water is presented and compared with additional studies conducted by the author in the same area in 1956.

scholarly journals Effect of saline water and shading on dragon fruit (‘pitaya’) seedling growth

2021 ◽  
Vol 25 (8) ◽  
pp. 547-552
Author(s):  
Geocleber G. de Sousa ◽  
Sinara B. Sousa ◽  
Ana C. da S. Pereira ◽  
Virna B. Marques ◽  
Maria L. G. da Silva ◽  
...  
Keyword(s):  
Plant Height ◽  
Root Length ◽  
Plant Biomass ◽  
Saline Water ◽  
Semiarid Region ◽  
Saline Stress ◽  
Higher Plant ◽  
Low Salinity ◽  
Dry Biomass ◽  
Salinity Water

ABSTRACT ‘Pitaya’ (Hylocereus undatus) is a fruit-bearing, climbing cactus with great food potential for the semiarid region. This study aimed to evaluate the production of ‘pitaya’ seedlings irrigated with low and high salinity water and grown in different light intensities. The experiment was conducted in a completely randomized design, in a 2 × 2 factorial arrangement, with two electrical conductivities of irrigation water: S1 - 0.3 dS m-1 (low salinity) and S2 - 5.0 dS m-1 (moderate salinity) in two environments: A1 - black net with 50% shading, and A2 - full sun, with ten replicates. The variables evaluated were plant height, main cladode diameter, above-ground biomass, root biomass, total plant biomass, number of secondary cladodes, root length, and length of secondary cladodes. The 50% shading (black net) promoted higher plant height, number of secondary shoots, and root length of the ‘pitaya’ plants. The irrigation with moderate saline water (5.0 dS m-1) reduced the number of secondary cladodes, length of root, and length of secondary cladodes. The ‘pitaya’ seedlings grown under 50% shading (black net) showed greater root dry biomass when irrigated with low-salinity water. Greater values of diameter of the primary cladode, above-ground dry biomass, and total dry biomass were observed under full sunlight and elevated saline stress.

Sign in / Sign up

Export Citation Format

Share Document