|
|
|
| Registros recuperados: 56 | |
|
|
| Silva,Carlos Henrique Corrêa da; Rocha,Fernanda Cipriano; Silva,Lusimar Lamarte Gonzaga Galindo da. |
| ABSTRACT Plant waste generated in a properly treated arboretum promotes nutrient cycling, reducing the volume of the residue. The aim of this study was to evaluate the potential of plant waste generated in the management of the Botanical Gardens of Rio de Janeiro, Brazil, for the production of organic composts. An experiment was carried out over 110 days to compost leaves, shredded twigs and leaves, shredded twigs and leaves plus manure, blades of grass, and aquatic plants, to determine influence factors and the levels of N, P and K. The experimental design was completely randomised with five treatments and four replications. The manure had an influence on the decomposition of the shredded plant waste. The shredded waste plus manure, blades of grass and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Composting; Green waste; Nutrient cycling. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000400558 |
| |
|
| |
|
| |
|
|
| Leal,Rafael Marques Pereira; Firme,Lilian Pittol; Montes,Célia Regina; Melfi,Adolpho José; Piedade,Sonia Maria De Stefano. |
| Wastewater irrigation may benefit agricultural crops with water and essential nutrients (mainly nitrogen), also affecting soil chemistry. The effects of effluent irrigation on yield, stalk nutrient uptake and on soil chemistry over 16 months were studied in a sugarcane (Saccharum spp.) crop growing on an Oxisol in Lins, State of São Paulo, Brazil. Irrigated plots received 50% of the recommended mineral-N fertilization and 100, 125, 150 or 200% of the crop water demand, while control plots received neither additional N nor water. The high sodium content of effluent resulted in Na inputs as high as 6.2 t ha-1, along with 1497 kg N ha-1 and 628 kg K ha-1. All the effluent plots except the T125 treatment had higher yields (up to 247 t ha-1) than the control... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum spp.; Water reuse; Land disposal; Nutrient cycling. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000200014 |
| |
|
|
| Domingues Lima.,Juliana; de Souza Bravo.,Natália; Rozane.,Danilo Eduardo; Nomura.,Edson Shigueaki; Gorla da Silva.,Silvia Helena Modenese; Gomes,Eduardo Nardini. |
| Abstract Pseudostem is an abundant residue after harvesting of the banana bunch, serving as a source of water, nutrients and organic substances. The present study aimed to evaluate the effect of pseudostem waste on ‘Nanica’ banana (Musa spp. AAA) cultivar in greenhouse under contrasting environmental conditions. For this, an experiment was carried out in in the Sao Paulo State University -UNESP in a randomized block design in a 2 x 2 factorial scheme (presence or absence of waste and two seasons), consisting of four replicates of three experimental plots with two pots per plant. One season was early November/2018 (Summer) and the other half of May/2019 (Winter). A 40 cm portion of the pseudostem collected from of a freshly harvested plant was sectioned... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vegetables residues; Nutrient cycling; Growth promoting substances. |
| Ano: 2020 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122020000300228 |
| |
|
|
| ALMEIDA,Everton José; LUIZÃO,Flávio; RODRIGUES,Domingos de Jesus. |
| Nutrient recycling in the forest is linked to the production and decomposition of litter, which are essential processes for forest maintenance, especially in regions of nutritionally poor soils. Human interventions in forest such as selecttive logging may have strong impacts on these processes. The objectives of this study were to estimate litterfall production and evaluate the influence of environmental factors (basal area of vegetation, plant density, canopy cover, and soil physicochemical properties) and anthropogenic factors (post-management age and exploited basal area) on this production, in areas of intact and exploited forest in southern Amazonia, located in the northern parts of Mato Grosso state. This study was conducted at five locations and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Transition forest; Nutrient cycling; Selective logging; Forest management. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672015000200157 |
| |
|
| |
|
|
| Balota, Elcio Liborio; Instituto Agronômico do Paraná; Machineski, Oswaldo; Instituto Agronômico do Paraná; Truber, Priscila Viviane; Instituto Agronômico do Paraná. |
| The objective of this work was to evaluate the changes in soil enzyme activities due to application of pig slurry under different soil tillage systems. The experiment was conducted in a clayey Oxisol in Palotina, PR, using different quantities of pig slurry (0, 30, 60 and 120 m3 ha-1 year-1) applied to the soil prior to the summer and winter crop season under conventional tillage (CT) and no tillage (NT), with three replicates. The areas were cultivated with soybean (Glycine max L.) and maize (Zea mays L.) in the summers of 1998 and 1999, respectively, and with wheat (Triticum sativum Lam.) in the winters of both years. The soil samples were collected in March and October of 1998 and 1999 at depths of 0-5, 5-10 and 10-20 cm. The pig slurry application and... |
| Tipo: Pesquisa de Campo |
Palavras-chave: Agrárias Microbiologia e Bioquimica do Solo Arylsulfatase; Acid phosphatase; Swine manure; No-tillage systems; Nutrient cycling Arylsulfatase; Acid phosphatase; Swine manure; No-tillage systems; Nutrient cycling. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/9816 |
| |
|
|
| Teixeira, Cícero Monti; EPAMIG; Carvalho, Gabriel José de; UFLA; Andrade, Messias José Bastos de; UFLA; Furtini Neto, Antônio Eduardo; UFLA. |
| O consórcio entre gramíneas e leguminosas para produção de palha, no sistema plantio direto, visa conciliar a proteção do solo, por meio da maior durabilidade da gramínea, com a fixação de N e disponibilização mais rápida de nutrientes pela decomposição da leguminosa. Diante disso, instalou-se um experimento para determinar a produção de fitomassa e o teor e acúmulo de micronutrientes do milheto, feijão-de-porco e guandu-anão, em cultivo solteiro e nos consórcios da gramínea com as leguminosas, para a produção de palha no plantio direto. O trabalho foi conduzido no campo experimental do Departamento de Agricultura da Universidade Federal de Lavras – Lavras, Estado de Minas Gerais. O delineamento foi o de blocos casualizados, com sete tratamentos, para os... |
|
Palavras-chave: 5.01.00.00-9 Agronomia plantio direto; Adubação verde; Micronutrientes; Ciclagem de nutrientes. no-tillage; Green manuring; Micronutrients; Nutrient cycling. |
| Ano: 2008 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5314 |
| |
|
|
| Machado, Murilo Rezende; Sampaio, Paulo de Tarso Barbosa; Ferraz, João; Camara, Rodrigo; Pereira, Marcos Gervasio. |
| Internal retranslocation is an important mechanism for nutrient conservation in plants, which depends on different factors. However, there are little data about this subject, especially on tropical forest species. This study aimed to evaluate the macronutrient retranslocation dynamic and the influence of ecological (P: pioneer x NP: non-pioneer) and phenological (ND: non-deciduous x D: semideciduous / deciduous) characteristics on the macronutrient content of leaves of five tree species on monospecific plantations in the Brazilian Amazon: Acacia mangium Willd., Parkia decussata Ducke, Dipteryx odorata (Aublet) Willd., Jacaranda copaia (Aubl.) D. Don and Swietenia macrophylla King. Photosynthetically active green leaves and senescent leaves (leaf litter)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.00.00.00-4 ecological groups; Litterfall; Nutrient cycling; Phenological groups; Plant nutrition Fertilidade do Solo e Adubação. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/26805 |
| |
|
| |
|
| |
|
|
| Brito,Letícia da Silva; Irmler,Ulrich; Forte,Bruno Vasconcelos Guimarães; Xavier,Tatiane Pereira; Martins,Rodrigo Lemes. |
| Abstract: Restingas are sandy areas spread along the Brazilian coast made up of a mosaic of forest and open woodland vegetation adapted to varying conditions of aridity, oligotrophy and salinity. Two vegetation types are very common in southeast Brazilian restingas, open Clusia formations and seasonally dry forest formation. Litter production and nutrient (C and N) turnover were studied comparatively in forest formations and Clusia formations, in vegetation patches with and without Clusia hilariana. The results showed that the breakdown process is extremely retarded in Clusia formations, with or without C. hilariana, leading to C accumulation in the soil. Microbial and soil fauna activity is lower in Clusia formations in comparison to forest formations;... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coastal ecosystem; Decomposition litterfall; Nutrient cycling; Nurse plant. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000400208 |
| |
|
|
| THOMAZ,S. M.; PEREIRA,G.; PAGIORO,T. A.. |
| Four size fractions of the sediment of six environments of the upper Paraná River floodplain were analyzed for carbon, nitrogen, and phosphorus contents and microbial respiration (oxygen consumption). Particle size did not affect nitrogen and phosphorus content or microbial activity, but did affect carbon content (F = 4.274, df = 3; 20, p = 0.020). The carbon concentration of ultra-fine particles was significantly lower than that of other sizes of sediment particles. Microbial respiration values were well predicted by sediment chemical composition, as shown by multiple regression (microbial respiration = -0.39 - 0.210C + 0.108N + 0.796P; F = 7.0495, p = 0.0022). However, phosphorus was the element which best explained the microbial respiration (partial... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microbial respiration; Nutrient cycling; Floodplain; Sediment fractions; Paraná River. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000200010 |
| |
|
|
| Tedesco,Marino José; Lauschner,Márcio Henrique; Gianello,Clesio; Bortolon,Leandro; Kray,Claudio Henrique. |
| Brazil is one of the leaders in the production and trading of tobacco leaves in the global market, which results in a large amount of residues that would be recycled and used as soil fertilizers in agriculture. This research aimed to study the land disposal potential and agricultural use of tobacco processing residues (TPRs), their mineralization and the nutrient supply to the plants. The study was carried out in an open area using pots with 32dm³ of a sandy soil (Paleudult), provided with water drainage collectors and tilled with three corn plants each. Eighteen treatments were tested with mineral fertilization, poultry manure (PM), earthworm compost (EC) and increasing rates (0, 7.5, 15, 30 e 60t ha-1) of TPR D (dust) and TPR S (stem fibers).Treatments... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nutrient cycling; Nitrogen; Water quality. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011000200009 |
| |
|
|
| Pereira,Natanael Santiago; Soares,Ismail; Miranda,Fábio Rodrigues de. |
| ABSTRACT: The use of leguminous green manure can be an alternative for the region agricultural systems due to its ability to incorporate significant amounts of nutrients into the soil through decomposition and nutrient release from biomass. This study aimed to evaluate the decomposition rates and nutrient release of six leguminous green manure species ( Crotalaria juncea , Canavalia ensiformes , Cajanus cajan , Crotalaria spectabilis , Dolichos lablab and Mucuna deeringiana ) in an area of the Jaguaribe-Apodi agricultural region, Brazil. Experiment was carried out under field conditions in a randomized block design with five replications. Decomposition and nutrient release from leguminous biomass were monitored by sampling at 30, 60, 90, 120, 150 and 180... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mineralization; Nutrient cycling; Plant residues. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000600970 |
| |
| Registros recuperados: 56 | |
|
|
|
