Substratos fertilizados com uréia revestida e o crescimento e estado nutricional da muda de citros

Azevedo, Eduardo Buchaul de; Marinho, Cláudia Sales; Muniz, Rodrigo de Almeida; Carvalho, Almy Júnior Cordeiro de

doi:10.4025/actasciagron.v31i1.6639

Cited by 8 publications

(7 citation statements)

References 24 publications

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“…Some trials conducted in Brazil have indicated that filter cake mixed with bagasse could be an adequate substrate for the production of eucalyptus [47] and citrus seedlings [14]. Citrus plants cultivated in this substrate were ready for grafting 120 days after transplanting, whilst plants growing in commercial substrate were not ready at this time.…”

Section: Other Applications Of Filter Cakementioning

confidence: 99%

“…Citrus plants cultivated in this substrate were ready for grafting 120 days after transplanting, whilst plants growing in commercial substrate were not ready at this time. The addition of 18 g k −1 N to plants growing in substrate containing filter cake resulted in taller plants with more leaves, greater leaf area, and larger aerial dry matter than plants grown in commercial substrate [14].…”

Section: Other Applications Of Filter Cakementioning

confidence: 99%

“…It has been used as a complete or partial substitute for mineral fertilizers in sugar cane cultivation [3,4], in the cultivation of other crops [5][6][7][8][9][10], in composting [11], in vermicomposting [12], and as a substrate in the production of seedlings [13,14].…”

Section: Introductionmentioning

confidence: 99%

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Filter Cake and Vinasse as Fertilizers Contributing to Conservation Agriculture

Prado

Caione

Campos

2013

Applied and Environmental Soil Science

189

113

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Utilising organic residues in agriculture contributes to the conservation of natural resources by recycling carbon and mineral elements. Organic residues produced by the sugar and alcohol agroindustries have great potential for use in conservation agriculture. The production of sugar and alcohol generates large quantities of byproducts, such as filter cake and vinasse, which can be used as soil improvers and substitutes for inorganic phosphorus and potassium fertilizers. However, the use of these residues in agriculture requires specific recommendations for each pedoclimatic condition to prevent environmental damage.

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Section: Other Applications Of Filter Cakementioning

confidence: 99%

Section: Other Applications Of Filter Cakementioning

confidence: 99%

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Filter Cake and Vinasse as Fertilizers Contributing to Conservation Agriculture

Prado

Caione

Campos

2013

Applied and Environmental Soil Science

189

113

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“…Por outro lado, o baixo aproveitamento do N pode ocorrer por causa da rápida liberação do nutriente dos fertilizantes, como a ureia, o que contribui para diminuir o sincronismo entre a liberação e a sua absorção pelas plantas e potencializa a sua perda para o ambiente (Brunetto et al, 2009). Assim, o uso de fertilizantes orgânicos, como o composto orgânico (Bertran et al, 2004), bem como de fertilizantes nitrogenados revestidos com polímeros, como a ureia revestida (Almeida et al, 2005;Azevedo et al, 2009), pode ser uma estratégia mais adequada para promover a liberação gradual de N, o que tende a aumentar o seu aproveitamento pela videira, mas, por outro lado, a quantidade mineralizada pode ser inferior à demandada pela planta.…”

Section: Introductionunclassified

Disponibilidade de nitrogênio de fontes minerais e orgânicas aplicadas em um Argissolo cultivado com videira

et al. 2014

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Nitrogen availability of organic and mineral sources applied in Sandy Typic cultivated with vineThe objective of this study was to evaluate the nitrogen (N) availability in a soil with history of growing vines and submitted to application of mineral and organic sources of nutrients. In October 2010, samples of a Sandy Typic Hapludalf soil were collected in a vineyard and in a natural pasture soil, in the municipality of Rosario do Sul (RS). The treatments consisted of: natural pasture and vineyard soil as control; vineyard soil + organic compost; vineyard soil + polymer coated urea and vineyard soil + urea. The soils were incubated and subsamples were taken at 0, 38, 70, 102 and 141 days of incubation to determine N-NH 4 + and N-NO 3 -contents. Concentrations of mineral N, net mineralization, N mineralization in relation to the total N and mineral buildup were calculated. In vineyard soils submitted to application of the polymer coated urea and urea, most N mineralization occurred in the initial period. Nitrogen release from the organic compound has better synchronicity with the vine requirements. The soil reserves of total nitrogen potentially mineralized may supply the vine demand for N.

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“…Therefore, as a strategy to minimize the availability of nitrate (N-NO 3 -) through leaching in the soil profile and ammonia (N-NH 3 ) through volatilization, mineral sources with controlled N release, such as polymer-coated urea, have been used, from which it is possible to increase the synchronization between N release from the fertilizer and its absorption by plants, compared with the use of conventional urea (Azevedo et al, 2009). According to Morgan et al (2009), urea granules are coated with three layers of polymers and the outmost layer comprises a low-solubility additive, which requires a greater volume of water to dissolve (10 to 20 mm), while the other layers remain in the solution along with ammonium (NH 4 + ), thus compromising their recognition by nitrifying bacteria and reducing losses through leaching.…”

Section: Introductionmentioning

confidence: 99%

Nutritional status and fruit production of Carica papaya as a function of coated and conventional urea

Júnior

Santos

Silva

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TAs a strategy to minimize N losses in the soil, mineral N sources, such as polymer-coated urea, have been studied as possibility to increase the synchronization of N release by the fertilizer and its absorption by plants. Thus, this study aimed to evaluate the contents of macronutrients and the production of Formosa papaya as a function of sources and doses of N fertilizer applied as top-dressing in the region of Bom Jesus-PI, Brazil. The treatments were arranged in a 2 x 4 factorial scheme corresponding to N sources (coated urea and conventional urea) and N doses (350, 440, 530 and 620 g plant -1 of N), with four replicates and four plants per plot. The contents of macronutrients in the leaf dry matter and fruit production were evaluated. The sources and doses of top-dressing N fertilization incremented the leaf contents of macronutrients and the production of Formosa papaya hybrid Caliman 01. Under the experimental conditions and based on the macronutrient contents considered as adequate for crop nutrition, associated with maximum fruit production (8.08 kg plant -1 ), the supply of 525 g of N plant -1 is recommended in the form of coated urea.Estado nutricional e produção do mamoeiro Formosa em função da aplicação de ureia protegida e convencional R E S U M O Como estratégia para minimizar as perdas de N no solo tem-se estudado fontes minerais de N-fertilizantes protegidas com polímeros a partir das quais é possível aumentar o sincronismo entre a liberação do nutriente pelo fertilizante e sua absorção pela planta. Neste sentido teve-se, como objetivo, avaliar os teores dos macronutrientes e a produção do mamoeiro Formosa em função de fontes e doses de N-fertilizante aplicadas em cobertura na região de Bom Jesus, PI. Os tratamentos foram dispostos em esquema fatorial 2 x 4 correspondentes a fontes de nitrogênio (ureia protegida e ureia convencional) e doses de nitrogênio (350, 440, 530 e 620 g planta -1 de N) com quatro repetições e quatro plantas por parcela. Avaliaram-se os teores de macronutrientes na massa seca foliar e a produção de frutos. As fontes e doses de adubação nitrogenada em cobertura incrementam as concentrações foliares de macronutrientes e a produção do mamoeiro Formosa híbrido Caliman 01. Nas condições em que o experimento foi desenvolvido e considerando os teores de macronutrientes admitidos como adequados para a nutrição da cultura associada à produção máxima de frutos (8,08 kg planta -1 ) recomenda-se o fornecimento de 525 g planta -1 de N na forma de ureia protegida.

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Substratos fertilizados com uréia revestida e o crescimento e estado nutricional da muda de citros

Cited by 8 publications

References 24 publications

Filter Cake and Vinasse as Fertilizers Contributing to Conservation Agriculture

Filter Cake and Vinasse as Fertilizers Contributing to Conservation Agriculture

Disponibilidade de nitrogênio de fontes minerais e orgânicas aplicadas em um Argissolo cultivado com videira

Nutritional status and fruit production of Carica papaya as a function of coated and conventional urea

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