ABSTRACT Water resources in the semi-arid region of Northeast Brazil commonly contain high salt concentrations, compromising quality water for agriculture. Thus, adopting techniques that make use these feasible agriculture is fundamental. The present study aimed to evaluate gas exchanges, quantum yield and photosynthetic pigments grafted West Indian cherry subjected stress potassium fertilization under greenhouse conditions municipality Campina Grande, PB, Brazil. Treatments were distributed...

The quantitative and qualitative scarcity of water resources is a frequent problem in the semi-arid region Brazilian Northeast.The availability for irrigation with high content dissolved salts common, affecting growth development crops.Thus, it necessary to adopt strategies that allow establishment irrigated agriculture this region.The objective study was evaluate effect salinity phosphorus/nitrogen combinations on ecophysiology West Indian cherry grafted first year cultivation.The research...

ABSTRACT The problem of the lack adequate water resources for agriculture has intensified in recent years, making it necessary to use waters with relatively high concentration salts irrigation crops all over world. objective this study was evaluate influence potassium (K) fertilization as a salt stress attenuator on gas exchanges and photochemical efficiency West Indian cherry. crop cultivated under greenhouse conditions municipality Campina Grande, PB, lysimeters filled 250 kg sandy loam...

ABSTRACT The success of yellow passion fruit cultivation in the semi-arid region Northeast Brazil is conditioned on ability this crop to develop under salt stress conditions, so it necessary identify techniques capable attenuating deleterious effects caused by irrigation with high-salinity waters. In context, present study aimed evaluate fluorescence, photosynthetic pigments and biomass cultivated foliar application hydrogen peroxide. was conducted a greenhouse, experimental design...

Due to the scarcity of water in semi-arid region Northeast Brazil, both quantitative and qualitative terms, use saline agriculture should be considered as one alternative for irrigated agriculture. This study therefore aimed evaluate photosynthetic pigments, growth production West Indian Cherry a function irrigation using waters with different salinity levels potassium (K) fertilization, after grafting. The was carried out drainage lysimeters under greenhouse conditions, eutrophic Regolithic...

ABSTRACT In Northeast Brazil, the cultivation of colored fiber cotton has stood out as one agricultural activities expressive importance because its various applications in industry and it is a labor-demanding crop. this context, study aimed to evaluate growth, water consumption, use efficiency production cv. ‘BRS Rubi’, function saline irrigation nitrogen (N) doses. The experiment was conducted lysimeters, under greenhouse conditions, eutrophic Regolithic Neosol, with sandy loam texture,...

ABSTRACT The study was carried out from August 2013 to January 2014 evaluate growth and production of cherry tomato cultivated under irrigation with water different salinity levels fertilized nitrogen (N) doses, in experiment conducted drainage lysimeters greenhouse conditions, at the Center for Agrifood Science Technology Federal University Campina Grande. statistical design randomized blocks a 5 x 4 factorial scheme, three replicates, treatments consisted five electrical conductivity (0.3,...

ABSTRACT The objective of this study was to evaluate the growth and gas exchanges white-fiber cotton cv. BRS 368 RF irrigated using waters with increasing levels salinity under nitrogen-potassium combination in a greenhouse municipality Campina Grande-PB, Brazil. treatments were distributed randomized blocks, corresponding five electrical conductivity water - ECw (0.7; 2.2; 3.7; 5.2 6.7 dS m-1) four combinations fertilization N/K2O (70/50, 100/75, 130/100, 160/125% recommended dose for pot...

Salt stress is abiotic that directly affects the gas exchange and redox metabolism of plants. However, some studies claim combination potassium-phosphorus fertilization may increase salt tolerance in In this context, objective study was to evaluate antioxidant enzyme activity responses combined tissues West Indian cherry during fructification phase, 240 days after application treatments (DAT) second year brackish water irrigation production. The were distributed randomized blocks, a 5 × 4...

ABSTRACT In arid and semi-arid regions, the quality of irrigation water varies in geographic terms during year, occurrence with high concentrations salts is common. this context, study aimed to evaluate emergence, growth production sesame, cultivar CNPA G3, irrigated saline fertilized N different carrier proportions by ratio nitrate ammonium ( NO --N NH +-N) an experiment conducted lysimeters arranged a greenhouse municipality Campina Grande-PB, Brazil. The treatments were distributed into...

The objective of this study was to evaluate chloroplast pigments and photochemical efficiency West Indian cherry cv. BRS 366 Jaburu as a function irrigation water salinity potassium-phosphorus fertilization combinations in the second year cultivation. experiment carried out protected environment Campina Grande, Brazil. Treatments were distributed randomized blocks, 5 × 4 factorial scheme, corresponding five levels electrical conductivity ECw (0.6, 1.4, 2.2, 3.0 3.8 dS m-1) four (100/100,...

HIGHLIGHTS Electrical conductivity of water 3.0 dS m-1 reduces the chlorophyll synthesis and production custard-apple. NPK recommendation 100-125-125, 125-125-100 125-125-125% cause more damage to cell membrane. Reduction in quantum efficiency custard-apple under salt stress is indicative photoinhi-bitory damage.

This study was conducted with the objective of evaluating gas exchanges and production components colored-fiber cotton as a function irrigation water different saline levels nitrogen (N) doses.The experiment carried out in drainage lysimeters, filled eutrophic Regolithic Neosol sandy loam texture, municipality Campina Grande-PB, Brazil.The statistical design randomized blocks treatments resulted from combination five electrical conductivity -ECw (5.1, 6.1, 7.1, 8.1 9.1 dS m -1 ) N doses -ND...

ABSTRACT Due to water limitations in terms of both quantity and quality the semi-arid region northeastern Brazil, use waters with high concentrations salts become necessary irrigated agriculture. Thus, this study aimed evaluate growth production grafted West Indian cherry under saline irrigation potassium fertilization. The experiment was carried out drainage lysimeters protected environment conditions, using a Regolithic Neosol sandy loam texture. Treatments resulted from combination two...

West Indian cherry is of great socioeconomic importance to Brazil because its potential keep local workers in rural areas and generate income. It mainly cultivated the Northeast region, where high salt concentrations are common water. This study was conducted evaluate gas exchanges production cultivar (cv.) ‘BRS 366 Jaburu’, as a function irrigation with water different salinity levels, nitrogen fertilization, at post-grafting stage. The experiment carried out pots adapted into drainage...

ABSTRACT This research was conducted in order to evaluate the growth and production of colored-fiber cotton, cv. ‘BRS Rubi’, irrigated with water different salinities nitrogen (N) doses. The experiment carried out drainage lysimeters filled soil material from an eutrophic Regolithic Neosol sandy-loam texture under greenhouse conditions Campina Grande, PB. a randomized block design treatments consisted five levels irrigation salinity following electrical conductivities - ECw (5.1, 6.1, 7.1,...

CRESCIMENTO E PRODUÇÃO DE ALGODOEIRO FIBRA COLORIDA CULTIVADO EM SOLO SALINO-SÓDICO ADUBAÇÃO ORGÂNICA ADAAN SUDÁRIO DIAS1; REGINALDO GOMES NOBRE2; GEOVANI SOARES LIMA3; HANS RAJ GHEYI4 FRANCISCO WESLEY ALVES PINHEIRO5 1Engenheiro Agrônomo – Pós-graduando em Engenharia Agrícola Unidade Acadêmica de Universidade Federal Campina Grande/UFCG, Grande, PB, Brasil, sudario_dias@hotmail.com;2Engenheiro Doutor Ciências Agrárias Pombal, rgomesnobre@yahoo.com.br;3Engenheiro Bolsista do Programa...

Salt stress is a threat to irrigated agriculture, especially in semi-arid regions, as it can cause irreversible damage the photosynthetic apparatus at any stage of plant development, reducing chlorophyll biosynthesis, which compromises photochemical efficiency and process plants. In this respect, phosphorus fertilization stands out an alternative mitigate effects salt on Therefore, present study investigated growth, gas exchange, pigments, sesame cv. BRS Seda with saline water fertilized...

The objective of this study was to evaluate the photochemical efficiency, photoassimilate partition and cotton production (Gossypium hirsutum L.) as a function saline stress nitrogen fertilization, in conducted during 130 days drainage lysimeters using an Eutrophic Regolithic Neosol sandy-loam texture. A randomized complete block design used 5 x factorial arrangement, with three replications, five levels electrical conductivity irrigation water -ECw (5.1, 6.1, 7.1, 8.1 9.1 dS m-1) doses...

The decrease in the availability of water resources, especially semi-arid regions, increases every day need for solutions to supply this deficit demand.Under low good-quality water, generation technologies and research that allow use saline waters is currently an essential activity.Hence, study aimed evaluate effect different levels irrigation nitrogen (N) fertilization doses on emergence, morpho-physiology flowering colored-fiber cotton, cv.'BRS Rubi', experiment conducted lysimeters under...

A agricultura, em várias partes do mundo, está enfrentando problemas devido à diminuição quantitativa e qualitativa dos recursos hídricos, sendo necessário a utilização de águas com concentração sais relativamente alta para irrigação das culturas. Desta forma, torna-se adoção práticas que viabilizem o uso tais recursos. Neste contexto, objetivou-se no presente trabalho avaliar os efeitos da salinas adubação nitrogenada sobre crescimento cultivar algodoeiro BRS Rubi fibra colorida experimento...

This study was conducted to evaluate water status, cell damage and gas exchanges of West Indian cherry grown under saline irrigation nitrogen (N) fertilization in the post-grafting stage. The experiment carried out drainage lysimeters greenhouse conditions Regolithic Neosol with sandy loam texture. Treatments consisted two levels electrical conductivity (ECw) (0.8 4.5 dS m-1) four N doses (70; 85; 100 115% recommendation), arranged randomized blocks, three replicates. dose relative 100%...

ABSTRACT The cultivation of sunflower allows its use as bio-fuel and alternative forage. It is a viable in the semiarid regions. Current study evaluates effect saline water use, sources doses nitrogen fertilization on production experiment conducted drainage lysimeters between May August 2012, under protected conditions, at Pombal - PB Brazil. consisted randomized block design, with 2 x 3 4 factorial arrangement three replications. treatments two levels electrical conductivity ECw (0.3 3.0...

ABSTRACT The study aimed to evaluate the effects of irrigation with saline water and fertilization nitrate (NO3--N) ammonium (NH4+-N) ratios on growth, flowering, consumption use efficiency sesame cv. CNPA G3. treatments were distributed in randomized blocks a 5 x factorial three replicates, referring five levels electrical conductivity - ECw (0.6, 1.2, 1.8, 2.4 3.0 dS m-1) (200/0, 150/50, 100/100, 50/150, 0/200 mg kg-1) ratios. Irrigation above 0.6 m-1 inhibited delayed flowering promoted...

Agricultural exploitation in the semi-arid region of Northeast Brazil depends on use irrigation to guarantee safe production crops.Nevertheless, waters commonly used this have high levels salts and require management strategies that make their possible agriculture.In context, present study aimed evaluate water relations, photosynthetic pigments growth grafted West Indian cherry as a function saline potassium (K) fertilization.The was conducted under greenhouse conditions lysimeters filled...