The effect of nitrogen and the method of application on yield and quality of white cabbage

Everaarts, A.P.; Moel, C.P. de

doi:10.1016/s1161-0301(98)00038-0

Cited by 34 publications

(36 citation statements)

References 11 publications

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“…Da mesma forma, Everaarts & Moel (1995) não constataram aumento no tamanho das inflorescências de couve-flor com a aplicação de N, em solo com quantidade elevada de N mineral. Em Batal et al (1997), a produção total e a massa média de inflorescências de couve-flor não foram influenciadas pelas aplicações de 2,2; 4,4 e 8,8 kg ha , os autores obtiveram aumento nos valores dessas características com a aplicação de 4,4 kg ha -1 de B, mostrando a influência da fertilidade do solo na resposta da planta à adição de boro.…”

Section: Resultsunclassified

Adubação com nitrogênio e boro na incidência de hastes ocas e na produção de couve-flor

Kojoi¹,

Mello

Camargo³

et al. 2009

Ciênc. agrotec.

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RESUMOO aparecimento de caule oco em couve-flor causa prejuízos aos produtores. O boro e o nitrogênio estão associados a essa desordem fisiológica, mas poucos estudos foram feitos em condições tropicais. Objetivou-se, no trabalho, avaliar os efeitos da adubação com N e B e da interação entre esses nutrientes na produção e na ocorrência de hastes ocas em couve-flor 'Shiromaru III', cultivada em solo da região de Ribeirão Preto (SP), durante o período de julho a setembro de 2003. O experimento foi conduzido em blocos inteiramente casualizados em esquema fatorial (3 x 3), com três doses de N (120, 180 e 240 kg ha -1 ) e três doses de B (2, 4 e 6 kg ha -1 ) e 4 repetições. A produção total e a massa média de inflorescências não foram influenciadas pelas doses de N e de B. A incidência de hastes ocas foi influenciada pela adubação com N, sendo que as aplicações de 180 e 240 kg ha -1 reduziram o aparecimento dessa anomalia em 9,03% e 11,72%, respectivamente. Termos para indexação:Brassica oleracea, solo, desordem nutricional. ABSTRACTThe hollow stem in cauliflower causes damages to producers. Nitrogen and boron are related to this physiological disorder but few studies were performed at tropical conditions. The aim of the experiment was to evaluate the effects of N and B applications and interaction between these nutrients on yield and hollow stem on cauliflower Shiromaru III, cultivated on soil of Ribeirão Preto region during the period from July to September of 2003. The experiment was carried out in a completely randomized design in a factorial scheme (3 x 3) with three rates of nitrogen (120, 180 and 240 kg ha -1 N) and three rates of boron (2, 4 and 6 kg ha -1 B) and four replicates. The total yield and head weight were not influenced by B and N applications. Hollow stem incidence was influenced by N fertilization, where applications of 180 and 240 kg ha -1 reduced the disorder in 9.03 and 11.72%, respectively. Index terms: Brassica oleracea, soil, nutritional disorder. INTRODUÇÃOO boro (B) é importante para a produção de hortaliças, pois sua deficiência causa mudanças fisiológicas, bioquímicas e anatômicas nas plantas, incluindo alterações na estrutura da parede celular, no funcionamento e na integridade das membranas, nas atividades enzimáticas e na produção de compostos metabólitos (GOLDBACK, 1997).Em couve-flor (Brassica oleracea var. botrytis ), os sintomas visuais de deficiência de B são conhecidos pelo aparecimento de pontuações escuras na inflorescência e cavidade na parte interna da haste. Essas desordens estão relacionadas à distribuição e mobilidade do B na planta e por fatores que afetam esses mecanismos e a disponibilidade do elemento no solo. O transporte do B é realizado via xilema, cuja distribuição depende da perda de água por transpiração pelos órgãos vegetais. Como os sítios de maior transpiração são as folhas desenvolvidas, o fluxo de B é mais intenso para esses tecidos que não são os de maior demanda por B, como as inflorescências. O B, dependendo da espécie, é considerado um elemento imóvel...

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Section: Resultsunclassified

Adubação com nitrogênio e boro na incidência de hastes ocas e na produção de couve-flor

Kojoi¹,

Mello

Camargo³

et al. 2009

Ciênc. agrotec.

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“…(1 (Zebarth et al 1995;Everaarts and De Willigen 1999b;Thompson et al 2002;Yoldas et al 2008;Bakker et al 2009b). Thus applications of 400 to 500 kg N ha…”

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confidence: 99%

Broccoli residue-derived nitrogen immobilization following amendments of organic carbon: An incubation study

et al. 2013

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Congreves, K. A., Voroney, R. P., O'Halloran, I. P. and Van Eerd, L. L. 2013. Broccoli residue-derived nitrogen immobilization following amendments of organic carbon: An incubation study. Can. J. Soil Sci. 93: 23Á31. Cole crops, compared with many other crops, can pose a high risk of N losses after harvest due to substantial quantities of readily mineralizable N in crop residues. Organic C amendments (OCA) may reduce N losses via immobilization; however, the synchrony of OCA decomposition and cole crop residue N mineralization is crucial. A soil incubation study evaluated net N and C mineralization of broccoli residue-derived N or fertilizer-derived N with three OCAs: wheat straw, yard waste, or used cooking oil, to predict N immobilization and the potential to mitigate post-harvest N losses. By the 56th d of incubation, broccoli residue mineralized 67.0 mg N kg (1 . In the broccoli residue-derived N treatments, wheat straw, yard waste, and used cooking oil significantly reduced the quantity of net N mineralization by 16.9, 12.3, and 86.0 mg N kg (1 , respectively. The net N mineralization data were fitted to a first-order exponential model, and the overall trend of OCA was negative, indicating immobilization, whether N was derived from broccoli residue or fertilizer. The order of effect from OCAs on N immobilization corresponded to the order of effect on net C mineralization, where wheat straw and yard waste were lower than used cooking oil. In broccoli residue treatments, compared with fertilizer, higher N immobilization occurred for used cooking oil, and higher net C mineralization occurred for used cooking oil and yard waste. The higher N immobilization and net C mineralization suggest that broccoli residue produced a synergistic effect on the decomposition of used cooking oil. Additionally, both broccoli residue and used cooking oil treatments had synchronous peaks of net C mineralization at 4 d. This study provides evidence to warrant field studies to confirm that the application of organic C, especially used cooking oil, after cole crop harvest may be a beneficial management practice to minimize soil N losses.Key words: Post-harvest, cole crops, wheat straw, yard waste, used cooking oil, nitrogen and carbon dynamics Congreves, K. A., Voroney, R. P., O'Halloran, I. P. et Van Eerd, L. L. 2013. Immobilisation de l'azote issu des re´sidus de brocoli apre`s amendement avec du carbone organique : e´tude d'incubation. Can. J. Soil Sci. 93: 23Á31. Comparativement a`de nombreuses autres cultures, les crucife`res peuvent entraıˆner une perte conside´rable de N apre`s la re´colte, car les de´chets de culture renferment une importante quantite´de N se mine´ralisant facilement. Une application de C organique (ACO) pourrait atte´nuer ces pertes par immobilisation, cependant, pour cela, il est capital de synchroniser les ACO avec la mine´ralisation du N des re´sidus de crucife`res. Les auteurs ont recouru a`une e´tude d'incubation du sol pour e´valuer la mine´ralisation nette du N et du C du N issu des re´sidus de bro...

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“…(1 was identified for a late storage cultivar, and included both applied N and compensation for residual mineral N in the soil (Everaarts and De Moel 1998). In Ontario, 265 kg ha…”

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confidence: 99%

Nitrogen and water requirements of fertigated cabbage in Ontario

McKeown¹,

Westerveld²,

Bakker³

2010

Can. J. Plant Sci.

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. 2010. Nitrogen and water requirements of fertigated cabbage in Ontario. Can. J. Plant Sci. 90: 101Á109. Increasing nutrient and water regulations have necessitated development of best management practices for application of nitrogen (N) and water. This study was conducted to determine if there was an optimal balance of N and water applied for late storage cabbage (Brassica oleracea L. var. capitata). Five rates of N and five irrigation rates arranged in a response surface design replicated three times were supplied to Huron cabbage grown on sandy loam soil to study the interaction of N and water applied. Plots were located at the University of Guelph, Simcoe Research Station, Ontario, Canada from 2003 to 2005. Total and marketable yields were maximized from a low of 278 kg ha(1 N in 2005 to above the highest rate tested (400 kg ha (1 N) in the other 2 yr. In 2005, there were 29 d above 308C and marketable yield was 49% lower than 2004, which had only 1 d above 308C. A target soil water value of 100% of field capacity was required to maximize yield in all 3 yr. More N is required as the water supply increases. The main influence of irrigation and N application was on head volume. Head density based on fresh weight was not influenced by irrigation or N application, but head density based on dry weight decreased with increased N application. Irrigation and N application should be managed concurrently to maximize yield and quality and N and irrigation efficiency for late storage cabbage. However, N and water will not prevent lost yield due to hot days, which suggests that late-cabbage yields are very sensitive to high air temperatures. , anne´e où la tempe´rature n'a de´passe´308C qu'une seule fois. Une teneur en eau e´gale a`100 % de la capacite´du terrain s'est ave´re´e ne´cessaire pour maximiser le rendement chaque anne´e. La quantite´de N requise augmente avec l'approvisionnement d'eau. L'irrigation et les applications de N influent principalement sur le volume des pommes de chou. La densite´des pommes selon le poids frais n'est pas affecte´e par l'irrigation ni les applications de N, mais en poids sec, elle diminue avec les applications de N. On devrait ge´rer simultane´ment l'irrigation et les applications de N pour maximiser le rendement du chou tardif de longue conservation et l'efficacite´des deux amendements. Cependant, les applications de N et l'eau n'empeˆcheront pas les pertes re´sultant de la chaleur, ce qui laisse croire que le rendement du chou est tre`s sensible aux tempe´ratures ambiantes e´leve´es.

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The effect of nitrogen and the method of application on yield and quality of white cabbage

Cited by 34 publications

References 11 publications

Adubação com nitrogênio e boro na incidência de hastes ocas e na produção de couve-flor

Adubação com nitrogênio e boro na incidência de hastes ocas e na produção de couve-flor

Broccoli residue-derived nitrogen immobilization following amendments of organic carbon: An incubation study

Nitrogen and water requirements of fertigated cabbage in Ontario

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