Produção de aquênio do girassol irrigado com água salobra

Travassos, Kaline Dantas; Soares, Frederico Antônio Loureiro; Gheyi, Hans Raj; Silva, Débora R. S.; Nascimento, Ana Kelliane Silva do; Dias, Nildo da Silva

doi:10.1590/s1415-43662011000400007

Cited by 22 publications

(26 citation statements)

References 15 publications

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“…Under saline conditions, water availability was reduced due to the decrease in the osmotic potential of the soil solution, forcing the plant to invest more vital reserves, such as sugars and carbohydrates, to absorb water and nutrients for growth and production (MUNNS; TESTER, 2008). A similar situation was reported by Travassos et al (2011), who observed losses of 9.64% per unit increase in water salinity, using the same sunflower cultivar under irrigation with water of salinity ranging from 0.5 to 5.0 dS m -1 . In contrast to the factor irrigation water salinity, N levels linearly stimulated the production of achenes, with an increment of 4.46 achenes per unit increase in N levels ( Figure 1B), i.e.…”

Section: Resultssupporting

confidence: 86%

Irrigation With Saline Water and Nitrogen in Production Components and Yield of Sunflower

et al. 2016

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-Due to the quantitative and qualitative limitation of water resources, saline water irrigation and nitrogen (N) fertilisation can contribute positively to the expansion of sunflower cultivation in the semiarid region of Northeast Brazil. Thus, this study aimed to evaluate production components and yield of sunflower, cv. "Embrapa 122-V2000", irrigated with waters of different salinity levels (electrical conductivity -ECw) and fertilised with varying amounts of N in a field experiment in an eutrophic Quartzarenic Neosol from November 2012 to February 2013. The experiment was performed in a completely randomised block design in split plots, in a 5 x 4 factorial scheme, which corresponded to five ECw levels (0.15, 1.5, 2.5, 3.5 and 4.5 dS m -1 ) and four N levels (60, 80, 100 and 120 kg ha -1 ), with three replicates and 30 plants per plot. The interaction between water salinity levels and N did not have significant effects on the studied variables; irrigation water salinity had isolated negative effects on the total number of achenes, number of viable achenes, productivity and oil yield of achenes. The increase in N levels stimulated the total number and the number of viable achenes, the mass of 1,000 achenes, capitulum diameter and productivity of achenes of sunflower, cv. "Embrapa 122-V2000", but had no effect on the oil content of achenes. N levels of up to 100 kg ha -1 promoted adequate oil content in the achenes of sunflower, cv "Embrapa 122-V2000".

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Section: Resultssupporting

confidence: 86%

Irrigation With Saline Water and Nitrogen in Production Components and Yield of Sunflower

et al. 2016

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“…No final do ensaio, aos 120 DAS, estimou-se a condutividade elétrica do extrato de saturação do solo (CEes) em base de condutividade elétrica da água de drenagem (CEad), utilizando a relação (CEes = 0,5 x CEad) recomendada por AYERS & WESTCOT (1999) e confirmada em estudo anterior em condições semelhantes às deste experimento (TRAVASSOS et al, 2011).…”

Section: Methodsunclassified

Crescimento e componentes de produção da mamoneira sob estresse salino e adubação nitrogenada

Lima¹,

Nobre²,

Gheyi

et al. 2014

Eng. Agríc.

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RESUMO:Esta pesquisa foi realizada com o propósito de avaliar o crescimento e os componentes de produção da mamoneira cv. BRS Energia sob diferentes níveis de salinidade da água de irrigação e de doses de nitrogênio em condições de campo, no Neossolo Regolítico eutrófico típico de textura franco-arenosa, no município de Pombal -PB, em delineamento de blocos ao acaso, testando-se cinco níveis de salinidade da água de irrigação-CEa (0,4-controle, 1,4; 2,4; 3,4 e 4,4 dS m -1 ) e cinco doses de N (50; 75; 100; 125 e 150 mg kg -1 ), em esquema fatorial 5 x 5, com três repetições. O aumento da CEa, a partir de 0,4 dS m -1 , promoveu redução do número de folhas (NF), da altura de planta (AP), do diâmetro de caule (DC), da massa seca da parte aérea (MSPA), do comprimento do racemo (CRP), do comprimento efetivamente ocupado pelas flores femininas (CREFF), do número de sementes (NSRP) no racemo primário e da produção total de sementes (PSemT) da cultivar estudada. A interação entre salinidade da água e doses de nitrogênio foi significativa para NF, DC, MSPA, CRP e CE do extrato de saturação do solo (CEes), tendo as doses crescentes de nitrogênio atenuado o efeito negativo da salinidade, até o nível de 2,4 dS m -1 . A CEes aumentou em função da CEa e das doses de N. PALAVRAS-CHAVE:Ricinus communis, água salina, nitrogênio. GROWTH AND COMPONENTS OF PRODUCTION OF CASTOR BEAN UNDER SALINE STRESS AND NITROGEN FERTILIZATION ABSTRACT:The research was carried out to evaluate the growth and components of production of the castor bean cv. BRS Energia under different levels of salinity of the irrigation water (CEa) and nitrogen doses under field conditions in an eutrophic Usthorthent of sandy loam texture in the municipality of Pombal, PB. The experimental design consisted of randomized blocks, testing five levels of salinity of irrigation water -CEa (0.4-control, 1.4, 2.4, 3.4 and 4.4 dS m -1 ) and five N doses (50, 75, 100, 125 and 150 mg kg -1 ) in a 5 x 5 factorial scheme with three replications. The increase of CEa from 0.4 dS m -1 reduced the number of leaves (NF), plant height (AP), stem diameter (DC), dry mass of the shoots (MSPA), cluster length (CRP), effective cluster length occupied by female flowers (CREFF), total number of seeds in primary cluster (NSRP) and total seed production (PSemT) of the studied castor bean cultivar. The interaction between water salinity and nitrogen dose for NF, DC, MSPA, CRP and CEes -electrical conductivity of the saturation extract of the soil was significant while the increase of nitrogen doses reduced the negative effects of salinity up to the level of 2.4 dS m -1 . The CEes increased with increase in CEa and nitrogen doses.

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“…Farmers in many parts of the world have attempted to use low quality water resources, such as saline and wastewater, however, the use of these water sources, particularly in the case of irrigated agriculture, depends on long-term strategies that ensure socioeconomic and environmental sustainability of the agricultural systems (MALASH et al, 2005;MURTAZA et al, 2006;TRAVASSOS et al, 2011;OSTER et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Growth and yield of cowpea/sunflower crop rotation under different irrigationm anagement strategies with saline water

et al. 2015

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Produção de aquênio do girassol irrigado com água salobra

Cited by 22 publications

References 15 publications

Irrigation With Saline Water and Nitrogen in Production Components and Yield of Sunflower

Irrigation With Saline Water and Nitrogen in Production Components and Yield of Sunflower

Crescimento e componentes de produção da mamoneira sob estresse salino e adubação nitrogenada

Growth and yield of cowpea/sunflower crop rotation under different irrigationm anagement strategies with saline water

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