Qualidade de sementes de Helianthus annuus L. em função da adubação fosfatada e da localização na inflorescência

Silva, Humberto Pereira da; Brandão, Delacyr da Silva; Neves, José Maria Gomes; Sampaio, Regynaldo Arruda; Duarte, Rômulo Fredson; Oliveira, Ariadne Santos

doi:10.1590/s0103-84782011000700009

Cited by 6 publications

(5 citation statements)

References 10 publications

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“…It is estimated that the highest 1000-grain weight is obtained with the application of maximum doses (120 kg ha -1 ) of N and P 2 O 5 , since the plant response to these nutrients was linear (Y = 53.66 + 0.03711**N + 0.04864**P; R 2 = 0.78 - Figure 4A). Silva et al (2011) observed increments of approximately 9.5% in 1000-grain weight with the application of 70 kg ha -1 of phosphate fertilizer, compared with the control, evidencing the importance of P in the production and quality of sunflower seeds. Maia Filho et al (2013) found 1000-grain weight varying from 18 to 30.70 g with N and P fertilization at doses of 40 and 70 kg ha -1 , respectively, which are much lower than those observed in the present study, 63.94 g.…”

Section: Resultsmentioning

confidence: 78%

“…Alkaline Cambisols in Brazil, in general, exhibit very low contents of available phosphorus, micronutrients and organic matter, requiring fertilizations for adequate crop development (Lemos et al, 1997). In the sunflower crop, N is a crucial element for seed and oil production (Alves et al, 2016), and P is directly related to seed production and quality (Silva et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen and phosphorus fertilization of sunflower crop in alkaline Cambisol

Braga

Oliveira

Santos

et al. 2018

Rev. bras. eng. agríc. ambient.

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A B S T R A C TSunflower is a crop that has aroused the interest of farmers because of its adaptability to wide climatic conditions and for its use in biodiesel production. However, there are only a few studies on sunflower fertilization in alkaline soils. This study aimed to evaluate nitrogen (N) and phosphorus (P) fertilization in sunflower (Helianthus annuus L.) cultivated in alkaline soil. A field experiment was carried out in Baraúnas-RN, Brazil, in a Haplic Cambisol derived from calcareous rock, where the sunflower H-251 hybrid was cultivated. The treatments were a combination of four doses of N (30, 60, 90 and 120 kg ha -1 ) and four doses of P 2 O 5 (30, 60, 90 and 120 kg ha -1 ). Sunflower growth and yield increased with the doses of N and P 2 O 5 . Doses of 30 kg ha -1 of N and 30 kg ha -1 of P 2 O 5 were more economical, corresponding to grain yield of 2378 kg ha -1 . Critical levels associated with these doses of N and P 2 O 5 were 28.2 g kg -1 for N leaf content, 2.84 for P leaf content, and 6.75 mg dm -3 for soil available P extracted by Mehlich-1.Adubação nitrogenada e fosfatada na cultura do girassol em Cambissolo alcalino R E S U M O O girassol é uma cultura que tem despertado o interesse dos produtores por sua adaptabilidade a diferentes condições climáticas e pela possibilidade de produção de biodiesel. Porém, pesquisas sobre adubação de girassol em solos alcalinos são escassas. Neste trabalho, objetivou-se avaliar a resposta da cultura do girassol (Helianthus annuus L.) à adubação nitrogenada e fosfatada em solo alcalino. O experimento de campo foi conduzido no município de Baraúnas, RN, em um Cambissolo Háplico eutrófico, onde se plantou o híbrido de girassol H-251. Os tratamentos resultaram da combinação de quatro doses de N (30, 60, 90 e 120 kg ha -1 ) e quatro doses de P 2 O 5 (30, 60, 90 e 120 kg ha -1 ). O crescimento e a produtividade do girassol aumentaram com o incremento das doses de N e de P 2 O 5 . As doses de 30 kg ha -1 de N e 30 kg ha -1 de P 2 O 5 se mostraram mais econômicas, correspondendo à produtividade de 2.378 kg ha -1 de grãos. Os níveis críticos associados a essas doses econômicas de N e de P 2 O 5 foram 28,2 g kg -1 para o teor de N na folha, 2,84 g kg -1 para o teor de P na folha, e 6,75 mg dm -3 para o P disponível no solo pelo extrator Mehlich-1.

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Section: Resultsmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Nitrogen and phosphorus fertilization of sunflower crop in alkaline Cambisol

Braga

Oliveira

Santos

et al. 2018

Rev. bras. eng. agríc. ambient.

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“…The cultivars presented significant different phosphorus content in T3 ( Figure 4e); the NA 5909 RG cultivar had the lowest content (3.4 mg g -1 ). Approximately 80% of the total phosphorus in the seed is in phytate form, which provides phosphorus during germination (RABOY, 2009), and is related to vital seed functions (SILVA et al 2011). The cultivars BMX VanguardaIPRO presented higher phytate content in T3 ( Figure 4f); however, it was significantly lower in T4.…”

Section: Resultsmentioning

confidence: 99%

Soluble Protein as Indicative of Physiological Quality of Soybean Seeds

2019

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After physiological maturity, the seed is physiologically independent of the plant, and responds to climatic variations that can decrease its vigor, which is dependent on the cultivar. The objective of this work was to evaluate the vigor of soybean cultivars and identify the biochemical components that have the greatest contribution to the maintenance of the physiological quality of the seeds after physiological maturity. The experiment was conducted in Fraiburgo, SC, Brazil, during the 2015/2016 crop season, using four soybean cultivars NA 5909 RG, BMX Ativa RR, BMX VanguardaIPRO, and NS 5959 IPRO. The seed physiological quality and the biochemical composition were evaluated at the phenological stages R7, R7+5 days, R7+10 days (R8), and R7+20 days. The data were subjected to analysis of variance (F test) and the means were compared by the Tukey's test (p<0.01). The seed biochemical composition and physiological quality were correlated using multivariate statistics. The germination of the seeds decreased 6% after physiological maturity up to R7+20 days. This decrease in vigor was dependent on the cultivar; NA 5909 RG decreased 3%, and BMX Ativa RR and NS 5959 IPRO decreased 7%. The biochemical components soluble protein, phytate, soluble sugar, and lipids decreased as a function of the harvest times, indicating the beginning of the process of seed quality loss. The maintenance of seed vigor after physiological maturity was dependent on the cultivar. The soluble protein content can be used as an indicator of the maintenance of physiological quality of soybean seeds after R7.

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“…For the centrifugal waste, plants cultivated using the Dose 2 also showed good development with respect to the parameters height and diameter. According to Silva et al (2011a), sunflower plants develop well in soils with medium fertility, but high productions are only reached when pH and the contents of nutrients available in the soil are adequate. C.…”

Section: Resultsmentioning

confidence: 99%

Barium and sodium in sunflower plants cultivated in soil treated with wastes of drilling of oil well

Sampaio¹,

Amaral

Zonta

et al. 2015

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThis study aimed to evaluate the effects of the application of two types of oil drilling wastes on the development and absorption of barium (Ba) and sodium (Na) by sunflower plants. The waste materials were generated during the drilling of the 7-MGP-98D-BA oil well, located in the state of Bahia, Brazil. The treatments consisted of: Control -without Ba application, comprising only its natural levels in the soil; Corrected control -with fertilization and without wastes; and the Ba doses of 300, 3000 and 6000 mg kg -1 , which were equivalent to the applications of 16.6, 165.9 and 331.8 Mg ha -1 of waste from the dryer, and 2.6, 25.7 and 51.3 Mg ha -1 of waste from the centrifugal. Plants cultivated using the first dose of dryer waste and the second dose of centrifugal waste showed growth and dry matter accumulation equal to those of plants under ideal conditions of cultivation (corrected control). The highest doses of dryer and centrifugal wastes affected the development of the plants. The absorption of Ba by sunflower plants was not affected by the increase in the doses. Na proved to be the most critical element present in the residues, interfering with sunflower development.Bário e sódio em plantas de girassol cultivadas em solos tratados com cascalho de perfuração R E S U M O Objetivou-se, neste trabalho, avaliar os efeitos da aplicação de dois resíduos gerados na perfuração de poços de petróleo no desenvolvimento e absorção de bário e sódio por plantas de girassol. Os resíduos foram gerados durante a perfuração do poço 7-MGP-98D-BA localizado na Bahia. As doses dos resíduos utilizadas foram: Testemunha -sem aplicação de bário; compreendendo apenas os teores naturais do solo; Testemunha -corrigida (com adubação e sem resíduo) e doses de 300, 3000 e 6000 mg kg -1 de bário equivalentes à aplicação de 16,6, 165,9 e 331,8 Mg ha -1 do resíduo do secador e 2,6, 25,7 e 51,3 Mg ha -1 do resíduo da centrífuga. As plantas cultivadas na primeira dose do resíduo do secador e na segunda dose do resíduo da centrífuga, apresentaram crescimento e acúmulo de massa seca iguais aos das plantas sob condições ideais de cultivo (Testemunha corrigida). As maiores doses dos resíduos do secador e da centrífuga afetaram o desenvolvimento das plantas. A absorção de bário pelo girassol não foi afetada com o aumento das doses. O sódio mostrou-se o elemento mais crítico presente nos resíduos, interferindo no desenvolvimento do girassol.

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Qualidade de sementes de Helianthus annuus L. em função da adubação fosfatada e da localização na inflorescência

Cited by 6 publications

References 10 publications

Nitrogen and phosphorus fertilization of sunflower crop in alkaline Cambisol

Nitrogen and phosphorus fertilization of sunflower crop in alkaline Cambisol

Soluble Protein as Indicative of Physiological Quality of Soybean Seeds

Barium and sodium in sunflower plants cultivated in soil treated with wastes of drilling of oil well

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