scholarly journals ESTRESSE SALINO E BIORREGULADOR VEGETAL EM FEIJÃO CAUPI

Irriga ◽  
2017 ◽  
Vol 22 (2) ◽  
pp. 314-329 ◽  
Author(s):  
Francisco De Assis de Oliveira ◽  
Mychelle Karla Teixeira de Oliveira ◽  
Luan Alves Lima ◽  
Rita De Cássia Alves ◽  
Lúcia Regina de Lima Régis ◽  
...  
Keyword(s):  
Vigna Unguiculata ◽  
Saline Water ◽  
Dry Mass ◽  
Commercial Plant ◽  
Severe Effect ◽  
Irrigation Water Salinity ◽  
Number Of Leaves ◽  
Four Levels ◽  
High Doses ◽  
E Mail

ESTRESSE SALINO E BIORREGULADOR VEGETAL EM FEIJÃO CAUPI  FRANCISCO DE ASSIS DE OLIVEIRA1; MYCHELLE KARLA TEIXEIRA DE OLIVEIRA1; LUAN ALVES LIMA1; RITA DE CÁSSIA ALVES1; LÚCIA REGINA DE LIMA RÉGIS1 E SANDY THOMAZ DOS SANTOS1 ¹ Departamento de Ciências Ambientais e Tecnológicas, UFERSA; Avenida Francisco Mota, 572, 59625-900, Bairro Costa e Silva, Mossoró, RN, Brasil, e-mail: [email protected]; [email protected]; [email protected]; [email protected]; [email protected]; [email protected]  1 RESUMO O uso de água salina para a irrigação depende da adoção de tecnologias que reduzam o efeito da salinidade nas plantas. O presente trabalho foi desenvolvido em Universidade Federal Rural do Semi-Árido, em Mossoró, RN, com o objetivo de avaliar o efeito de bioestimulante sobre o feijão caupi irrigado com águas salinizadas. Utilizou-se o delineamento em blocos casualizado, em esquema fatorial 4 x 4, com quatro repetições, sendo quatro níveis de salinidade da água de irrigação (S1-0,5; S2-2,0; S3-3,5 e S4-5,0 dS m-1) e quatro doses de bioestimulante via pulverização foliar [B1-0 (água destilada), B2-5, B3-10 e B4-15 mL L-1], utilizando o fitorregulador comercial Stimulate®. Foram avaliadas as seguintes variáveis: número de folhas, área foliar, diâmetro do caule, massa seca de folhas, caule, vagens e massa seca total. Houve efeito significativo da interação entre os fatores em todas as variáveis analisadas. O uso de água com condutividade acima de 3,5 dS m-1 reduz o crescimento e a produção de grãos do feijão caupi, com efeito mais severo em doses elevadas de bioestimulante. O uso de bioestimulante favorece o crescimento e produção de biomassa, mas só é eficiente na ausência do estresse salino. O uso de Stimulate® não reduziu o efeito deletério da salinidade na cultura do feijão caupi, e quando utilizado em doses elevadas potencializou o efeito da salinidade. Palavras-chave: Vigna unguiculata L., salinidade, fitorreguladores  OLIVEIRA,F. A.; OLIVEIRA, M. K. T.; LIMA, L. A.; ALVES, R. C.; RÉGIS, L. R. L.; SANTOS, S. T.SALT STRESS AND PLANT BIOREGULATORS IN COWPEA CROP  2 ABSTRACT The use of saline water for irrigation depends on the adoption of technologies to reduce the effect of salinity in the plants. This study was conducted in Mossoró, RN/Brazil, in order to evaluate the effect of plant growth regulator application on cowpea irrigated with salted water. The study design was randomized blocks in a factorial 4 x 4, with four replications, with four levels of irrigation water salinity (S1-0.5, S2-2.0, S3-3.5 and S4-5.0 dS m-1) and four levels of foliar biostimulant spray [B1-0 (distilled water), B2-5, B3-10 and B4-5 mL L-1] using the commercial plant regulator Stimulate®. the following variables were evaluated: Number of leaves, leaf area, diameter stem, dry mass of leaves, stem, pods and total dry mass There was a significant interaction between the factors in all variables. The use of water with a conductivity of above 3.5 dS m-1 reduces the growth and production of cowpea grains with more severe effect in high doses of biostimulant. The use of biostimulant favors the growth and biomass, but is only efficient in the absence of salt stress. The use of Stimulate®  does not reduce the deleterious effect of salinity on the cowpea culture, and when used in high doses potentiated the effect of salinity. Keywords: Vigna unguiculata L., salinity, plant regulators

scholarly journals The Influence of H2O2 Application Methods on Melon Plants Submitted to Saline Stress

2019 ◽  
Vol 11 (11) ◽  
pp. 245
Author(s):  
Adriana Silva Santos ◽  
Juliana Formiga Almeida ◽  
Marcio Santos da Silva ◽  
Jackson Silva Nóbrega ◽  
Thais Batista de Queiroga ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Irrigation Water ◽  
Biomass Accumulation ◽  
Dry Mass ◽  
Cultivated Plants ◽  
Saline Stress ◽  
Defense System ◽  
Biotic And Abiotic Stresses ◽  
Irrigation Water Salinity ◽  
Number Of Leaves

The salinity in irrigation water is one of the most important causes to decline cultivated plants yield. The H2O2 application has shown efficiency as a stimulator and activator for antioxidative defense system in plants submitted to biotic and abiotic stresses. The objective of this study was to evaluate methods for hydrogen peroxide application as a strategy to minimize the effects of saline stress on melon plants. The experiment was designed in complete randomized blocks and set in 2 × 4 factorial scheme, consisting two levels for irrigation water salinity (S1 = 0.3 and S2 = 2.0 dS m-1) and four methods for hydrogen peroxide application (15 mM), (T1 = no peroxide application, T2= imbibition of seeds, T3 = at sowing, T4 = Foliar spraying), with five repetitions. It was evaluated the following variables at 58 days after transplanting: plant height, stem diameter, number of leaves, number of flowers, shoot dry mass, root dry mass and total dry mass. The results showed that salinity affected the growth, biomass accumulation and plant quality severely, with the highest losses promoted by the electrical conductivity of 2.0 dS m-1.

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 Performance of colored cotton under irrigation water salinity and organic matter dosages

2019 ◽  
Vol 14 (5) ◽  
pp. 1
Author(s):  
Patrícia Dos Santos Nascimento ◽  
Lucylia Suzart Alves ◽  
Vital Pedro da Silva Paz
Keyword(s):  
Organic Matter ◽  
Plant Height ◽  
Irrigation Water ◽  
Stem Diameter ◽  
Water Salinity ◽  
Irrigation Water Salinity ◽  
Colored Cotton ◽  
Number Of Leaves ◽  
Four Levels ◽  
Shoot Mass

This work evaluated the development of colored cotton submitted to irrigation water of different salinity levels and organic matter doses from tanned manure. The experimental design was completely randomized in a 4 x 4 factorial scheme with 3 replications, totaling 48 experimental plots. The factors studied were 4 doses of organic matter (1, 4, 7 and 10%) and four levels of irrigation water salinity (0.26; 1, 2 and 4 dS m-1). The variables analyzed were plant height, stem diameter, number of leaves, number of fruits and fresh shoot mass. Significant effect of organic matter was observed on all studied variables, with a positive response on the increase of all variables as a function of increasing doses of organic matter. The isolated effect of salinity was significant for all parameters evaluated, except for the number of leaves, with significant reductions of 6.03; 3.27; 5.23; 6.94% in the parameters: plant height, stem diameter, number of fruits and shoot fresh weight respectively, for each unit increase of irrigation water salinity. The interaction between the variation sources studied had a significant effect only for fresh shoot mass, where the highest average for this parameter was observed at 10% organic matter dosage at irrigation water salinity level of 1.0 dS m-1.

scholarly journals Physiological Responses of Cowpea (Vigna unguiculata) Under Irrigation With Saline Water and Biostimulant Treatment

2018 ◽  
Vol 10 (12) ◽  
pp. 24
Author(s):  
Leonardo Vieira de Sousa ◽  
Rayanne Maria Paula Ribeiro ◽  
Manoel Galdino dos Santos ◽  
Fernando Sarmento de Oliveira ◽  
Hugo Ferreira ◽  
...  
Keyword(s):  
Vigna Unguiculata ◽  
Saline Water ◽  
Net Photosynthesis ◽  
Co2 Concentration ◽  
Dry Mass ◽  
Saline Stress ◽  
Stress Effect ◽  
Negative Effects ◽  
Shoot Height ◽  
Cowpea Cultivars

Cowpea (Vigna unguiculata) is one of the world’s main crops, and it is a fundamental source of protein for semiarid regions population. In these regions, the use of high salts concentration water in irrigation systems is one of the major factors that contributes to reduced cowpea yield. One way to alleviate the negative effects of salinity is through the biostimulants application, which is a product that has beneficial substances to the plants metabolism. The aim of this study was to evaluate the application of biostimulant in cowpea cultivars under irrigation with saline water. The study was carried out in the Agrarian Sciences Center, of the Department of Agronomic and Forest Sciences of the Federal Rural University of the Semi-Arid, in the city of Mossoró, RN. The experimental design was completely randomized, with four replications. The treatments were arranged in 5 × 2 × 2 factorial scheme, with five doses of biostimulant (0, 15, 30, 45 and 60 mL L-1), two electrical conductivities of the irrigation water (0.5 and 5.0 dS m-1), and two cowpea cultivars (IPA-206 and BRS Guariba). The evaluated characteristics were: chlorophyll content index, stomatal conductance, net photosynthesis, internal CO2 concentration, transpiration rate, shoot height, stem diameter and shoot dry mass. The biostimulant application was not efficient in attenuating the salinity stress effect on the development of cowpea cultivars. The higher biostimulant concentrations along with the use of saline water increased the negative effects of salinity on the cowpea plants physiology. There was no difference between the cultivars regarding the tolerance to saline stress and the application of biostimulant.

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 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 Growth and chlorophyll in noni seedlings irrigated with saline water in substrate with vermicompost

2019 ◽  
Vol 23 (8) ◽  
pp. 586-590 ◽  
Author(s):  
Daiane G. dos Santos ◽  
Belísia L. M. T. Diniz ◽  
Manoel A. Diniz Neto ◽  
João H. C. S. Silva ◽  
William N. de Oliveira Filho ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Irrigation Water ◽  
Saline Water ◽  
Stem Diameter ◽  
Morinda Citrifolia ◽  
Limiting Factor ◽  
Negative Effects ◽  
Randomized Design ◽  
Number Of Leaves ◽  
Four Levels

ABSTRACT Irrigation is a limiting factor for the development of crops, and all water sources contain salts, which can accumulate in the soil and in the plant, compromising its development. The use of vermicompost is one of the alternatives to mitigate the negative effects of salts on plants. This organic compost is a soil conditioner and a nutrient source for plants. Thus, this study aimed to evaluate the growth and chorophyll of noni (Morinda citrifolia L.) in response to the salinity of irrigation water in substrates with and without vermicompost. A completely randomized design in a 4 × 3 factorial scheme was used, corresponding to four levels of electrical conductivity of the irrigation water (0.5, 1.5, 3.0 and 4.5 dS m-1), in three soil substrates (without humus, with 33.33 and 66.66% of humus). Three months after germination, the following variables were evaluated: plant height; stem diameter; number of leaves; chlorophyll index (a, b and total) in the leaves; and fresh and dry matter of shoots and roots. The increase of salinity in irrigation water negatively influences growth in height, stem diameter, biomass production and chlorophyll a and total indexes, but with lower intensity in substrates with humus, that improves the fertility of the substrate and favors the growth of noni plants, regardless of the salinity of the irrigation water; however, its beneficial effect decreases with the intensification of electrical conductivity of irrigation water.

Saline Water Irrigation Through Drip for Groundnut-Wheat Cropping Sequence in Hyper Arid-Region of Rajasthan

2021 ◽  
Vol 58 (1) ◽  
pp. 50-61
Author(s):  
A. K. Singh ◽  
Ranjeet Singh ◽  
S. R. Yadav ◽  
A. S. Godara ◽  
S. P. Singh ◽  
...  
Keyword(s):  
Irrigation Water ◽  
Arid Region ◽  
Crop Yields ◽  
Saline Water ◽  
Water Salinity ◽  
Yield Attributes ◽  
Cropping Sequence ◽  
Irrigation Water Salinity ◽  
Biological Yield ◽  
Four Levels

A field experiment was conducted to assess the suitability of saline water for irrigation, and to know the irrigation water requirement of groundnut-wheat cropping sequence in hyper-arid region of Rajasthan. In this split-plot experiment, the main plots had four levels of irrigation water salinity (ECiw0.25 (Best available water, BAW), 4, 8 and 12dS.m-1); and the sub-plots had combinations of two treatments on drip lateral spacing of 0.60 m and 0.90 m with 0.30 m emitter spacing, and three levels of irrigation water application (0.6, 0.8 and 1.0 times of pan evaporation (PE)). The highest biological yield (grain + straw) of groundnut and wheat recorded in BAW was statistically at par with irrigation water salinity level of 4 dS.m-1. Higher irrigation water salinity levels (8 and 12 dS.m-1) and placement of laterals at 0.90 m led to significant reduction in biological yield. In monetary terms, use of BAW resulted in highest B:C ratio of 1.73 for groundnut-wheat cropping sequence, while ECiw 4 dS.m-1 showed B:C ratio of 1.70. Highest crop yields, gross return and B:C ratio were observed under 0.60 m lateral spacing and irrigation application at 1.0 PE. Interaction effect of salinity of irrigation water and lateral spacing on yield and yield attributes was significant for both crops. Study demonstrated that the salinity limit of 4 dS.m-1 can be considered as threshold irrigation water salinity for drip irrigated groundnut and wheat crops in hyper-arid region of Rajasthan

scholarly journals CULTIVO DO MILHETO IRRIGADO COM ÁGUA SALINA EM DIFERENTES COBERTURAS MORTAS

Irriga ◽  
2020 ◽  
Vol 25 (2) ◽  
pp. 347-360
Author(s):  
Amitair Ferreira Lima ◽  
Geocleber Gomes De Sousa ◽  
Maria Vanessa Pires De Souza ◽  
Francisco Barroso Da Silva Junior ◽  
Silas Primola Gomes ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Irrigation Water ◽  
Dry Matter ◽  
Saline Water ◽  
Soil Protection ◽  
Saline Stress ◽  
Saturation Extract ◽  
Soil Saturation ◽  
Number Of Leaves ◽  
E Mail

CULTIVO DO MILHETO IRRIGADO COM ÁGUA SALINA EM DIFERENTES COBERTURAS MORTAS     AMITAIR FERREIRA LIMA1; GEOCLEBER GOMES DE SOUSA2; MARIA VANESSA PIRES DE SOUZA3; FRANCISCO BARROSO DA SILVA JUNIOR4; SILAS PRIMOLA GOMES2 E CLARISSA LIMA MAGALHÃES5   1 Engenheira agrônoma formada pela Universidade da Integração Internacional da Lusofonia Afro-Brasileira (Avenida da abolição, 3, Centro, 62.790-000, Redenção/Ce, Brasil). E-mail: [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], [email protected] 3 Mestranda pelo programa de pós graduação em fitotecnia da Universidade Federal Rural do Semiárido, Campus Mossoró (Av. Francisco Mota, 572, Bairro Costa e Silva, CEP: 59.625-900, Mossoró/RN, Brasil). E-mail: [email protected] 4 Mestrando pelo programa de pós graduação em ciência do solo da Universidade Federal do Ceará, Campus do Pici (Av. Mister Hull, 2977, Pici, 60.021-970, Fortaleza/Ce, Brasil). E-mail: [email protected] 5 Discente 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]     1 RESUMO   Objetivou-se com o presente trabalho, avaliar o crescimento e acúmulo de biomassa de plantas de milheto irrigadas com água salina em solo com diferentes coberturas. O experimento foi realizado em agosto de 2018, a pleno sol na horta didática da Universidade da integração internacional da Lusofonia Afro-Brasileira (UNILAB), Redenção, Ceará. O delineamento experimental foi inteiramente casualizado (DIC), em esquema fatorial 5x4, com 4 repetições. O primeiro fator referente aos valores de condutividade elétrica da água de irrigação - CEa: A1 (1,0 dS m-1), A2 (2,0 dS m-1), A3 (3,0 dS 11 m-1), A4 (4,0 dS m-1) e A5 (5,0 dS m-1), versus as coberturas adotadas, C1 (sem cobertura-controle), C2 (palha de arroz), C3 (bagana de cana-de-açúcar) e C4 (resíduos vegetais de espontâneas). Aos 35 dias após a semeadura, foram avaliadas: altura das plantas (AP), número de folhas (NF), diâmetro do colmo (DC), comprimento de raiz (CR), área foliar (AF), matéria seca da parte aérea (MSPA), da raiz (MSR) e total (MST), pH do solo e a condutividade elétrica do extrato de saturação do solo (CEes). O aumento da condutividade elétrica na água de irrigação, promoveu aumento da salinidade no extrato de saturação do solo, assim como reduções na emissão do número de folhas no milheto e o uso da cobertura morta amenizou os efeitos da salinidade contida na água, nas variáveis: MSPA, MSR, MST, DC e AP, sendo a cobertura de casca de arroz a alternativa mais eficiente na atenuação desses efeitos.   Palavras-chave: Penissetum glaucum L., estresse salino, proteção do solo     LIMA, A. F.; SOUSA, G. G.; SOUZA, M. V. P.; SILVA JUNIOR, F. B.; GOMES, S. P.; MAGALHÃES, C. L. CULTIVATION OF MILLET IRRIGATED WITH SALINE WATER IN DIFFERENT MULCHES     2 ABSTRACT   The objective of this work was to evaluate the growth and accumulation of dry matter of millet plants irrigated with saline water in soil with different mulches. The experiment was carried out in August 2018, under full sun in the didactic garden of the University of the International Integration of Afro-Brazilian Lusophony (UNILAB), Redenção, Ceará. The experimental design was completely randomized (DIC), in a 5x4 factorial scheme, with four replicates. The first factor referring to the values of electrical conductivity of the irrigation water: A1 (1.0 dS m-1), A2 (2.0 dS m-1), A3 (3.0 dS m-1), A4 (4.0 dS m-1) and A5 (5.0 dS m-1), versus the coverages adopted, C1 (without cover), C2 (rice straw), C3 (sugarcane bagana) and C4 (vegetable spontaneous waste). At 35 days after sowing, plant height (AP), number of leaves emitted (NF), stalk diameter (DC), root length (CR), leaf area (AF), shoot dry matter (MSA), root dry matter (MSR), total dry matter (MST), soil pH and soil saturation extract electrical conductivity (CEs) were assessed. The increase in the electrical conductivity in the irrigation water promoted an increase in salinity in the soil saturation extract, as well as reductions in the number of leaves in the millet, and the use of the mulch reduced the effects of the salinity contained in the water in the following variables: MSPA, MSR, MST, DC and AP, with rice husk coverage being the most efficient alternative to mitigate these effects.   Keywords: Penissetum glaucum L., saline stress, soil protection.

scholarly journals PRODUÇÃO DE MUDAS CÍTRICAS UTILIZANDO ÁGUAS SALINAS

Irriga ◽  
2005 ◽  
Vol 10 (3) ◽  
pp. 288-298 ◽  
Author(s):  
Tales Miler Soares ◽  
Sergio Nascimento Duarte ◽  
Christiano César Dibbern Graf ◽  
Marcelo Zanetti ◽  
Silvio Sandoval Zocchi
Keyword(s):  
Saline Water ◽  
Current System ◽  
Dry Mass ◽  
Sao Paulo ◽  
São Paulo ◽  
Rangpur Lime ◽  
Desalinated Water ◽  
Significant Damage ◽  
Number Of Leaves ◽  
Tree Production

PRODUÇÃO DE MUDAS CÍTRICAS UTILIZANDO ÁGUAS SALINAS  Tales Miler Soares1; Sergio Nascimento Duarte1; Christiano César Dibbern Graf2; Marcelo Zanetti2; Silvio Sandoval Zocchi31Departamento de Engenharia Rural, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de Saõ Paulo, Piracicaba, SP,  [email protected] Mudas.3Departamento de Ciências Exatas, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de Saõ Paulo, Piracicaba, SP  1 RESUMO Considerando que o atual sistema de produção de mudas cítricas no Estado de São Paulo potencializou os riscos de salinização do meio de cultivo, conduziu-se um trabalho objetivando investigar o crescimento da laranjeira ‘Valência’ enxertada em três porta-enxertos (‘Cravo’, ‘Cleópatra’ e ‘Swingle’), utilizando três qualidades de água: natural (1,19 dS m-1), dessalinizada (0,02 dS m-1) e residual (2,11 dS m-1). Também foram estudados dois níveis de Ca(NO3)2: 0 e 2,105 g L-1, conformando um esquema fatorial 3x3x2. As águas salinas e a aplicação de Ca(NO3)2 salinizaram o substrato, a despeito da lixiviação observada. O Ca(NO3)2, além de não incrementar o desenvolvimento das mudas, mostrou-se prejudicial às raízes, devido ao exacerbado estresse osmótico proporcionado. A água natural implicou em prejuízos às raízes, mas proporcionou desenvolvimento da parte aérea compatível à água dessalinizada. A irrigação com água residual promoveu depreciação das raízes, do diâmetro do caule e da massa seca da parte aérea, com reflexo negativo na acumulação de massa seca na planta, quando comparada à água dessalinizada. A altura das plantas e o número de folhas não foram prejudicados pela salinidade das águas. UNITERMOS: Citrus, salinidade, irrigação, mudas, qualidade da água, fertirrigação.  SOARES, T.M.; DUARTE, S.N.; GRAF, C.C.D.; ZANETTI, M.; ZOCCHI, S.S.  CITRUS NURSERY TREE PRODUCTION USING SALINE WATER  2 ABSTRACT Considering that current system for citrus nursery tree production in São Paulo State, Brazil, increased the medium salinisation risk, this experiment was carried out aiming to investigate the growth of ‘Valencia’ sweet orange nursery trees, budded on three rootstocks (‘Rangpur’ lime, ‘Cleopatra’ mandarin and ‘Swingle’ citrumelo), using three water qualities: natural (ECW = 1.19 dS m-1), desalinated (ECW = 0.02 dS m-1) and reject brine (ECW = 2.11 dS m-1). Two Ca (NO3)2 levels were also studied: 0 and 2.105 g L-1, according to a 3 x 3 x 2 factorial scheme. Saline waters and Ca (NO3)2 application increased media growth salinity, despite the registered lixiviation. The Ca (NO3)2 did not enhance plant growth, damaging the roots, due the osmotic stress. Natural water application resulted in significant damage to roots, but provided scion growth (diameter, dry mass) compatible to desalinated water. Irrigation with rejected water, compared to desalinated water, resulted in decrease of stem diameter and roots, and scion dry mass accumulation. Water salinity did not affect the shoot length and the number of leaves. KEYWORDS: Citrus, salinity, irrigation, water quality, fertirrigation

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