Consulta: creatorFacets:"Martins,Amanda Posselt"
Registros recuperados: 13
Data/hora: 02/06/2024 02:34:11

Soil moisture and soybean physiology affected by drought in an integrated crop-livestock system
Provedor de dados: 86
Autores: Martins,Amanda Posselt; Costa,Sérgio Ely Valadão Gigante de Andrade; Anghinoni,Ibanor; Kunrath,Taise Robinson; Cecagno,Diego; Reichert,José Miguel; Balerini,Fabrício; Dillenburg,Lúcia Rebello; Carvalho,Paulo César de Faccio.
Abstract: The objective of this work was to evaluate the impact of grazing intensities after 11 years of an integrated crop-livestock system, under no-tillage, on soil moisture and soybean physiological parameters during a summer season affected by drought. The experiment was established in 2001 on a Rhodic Hapludox. Treatments consisted in the succession of soybean (summer) and a mixed pasture of black oat + Italian ryegrass (winter), under different beef-cattle grazing intensities: intensive grazing, with 0.10-m pasture height; moderate grazing, with 0.20-m pasture height; and no grazing. During the soybean cycle, in the 2011/2012 crop season, rainfall was 40% of the climatological normal. The soil moisture was within the limits of available water both...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Leaf temperature; Leaf water potential; Water availability.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000800978

Carbon and nitrogen cycling in an integrated soybean-beef cattle production system under different grazing intensities
Provedor de dados: 86
Autores: Assmann,Joice Mari; Anghinoni,Ibanor; Martins,Amanda Posselt; Costa,Sérgio Ely Valadão Gigante de Andrade; Kunrath,Taise Robinson; Bayer,Cimélio; Carvalho,Paulo Cesar de Faccio; Franzluebbers,Alan Joseph.
Abstract:The objective of this work was to evaluate the effect of grazing intensity on the decomposition of cover crop pasture, dung, and soybean residues, as well as the C and N release rates from these residues in a long-term integrated soybean-beef cattle system under no-tillage. The experiment was initiated in 2001, with soybean cultivated in summer and black oat + Italian ryegrass in winter. The treatments consisted of four sward heights (10, 20, 30, and 40 cm), plus an ungrazed area, as the control. In 2009-2011, residues from pasture, dung, and soybean stems and leaves were placed in nylon-mesh litter bags and allowed to decompose for up to 258 days. With increasing grazing intensity, residual dry matter of the pasture decreased and that of dung...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Avena strigose; Glycine max; Lolium multiflorum; Integrated crop-livestock; Nutrient cycling; Soil organic matter.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015001000967

Crop Response to Gypsum Application to Subtropical Soils Under No-Till in Brazil: a Systematic Review
Provedor de dados: 90
Autores: Tiecher,Tales; Pias,Osmar Henrique de Castro; Bayer,Cimélio; Martins,Amanda Posselt; Denardin,Luiz Gustavo de Oliveira; Anghinoni,Ibanor.
ABSTRACT The use of gypsum to improve the root environment in tropical soils in the southeastern and central-western regions of Brazil is a widespread practice with well-established recommendation criteria. However, only recently gypsum began to be used on subtropical soils in South of Brazil, so available knowledge of its effect on crop yield is incipient and mainly for soils under no-till (NT) systems. Avaiable studies span a wide range of responses, from a substantial increase to a slight reduction in crop yield. Also, the specific conditions leading to a favorable effect of gypsum application on crop yield are yet to be accurately identified. The primary objectives of this study were to examine previously reported results to assess the likelihood of a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phosphogypsum; Aluminum saturation; Subsurface acidity; Base saturation.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100505

Effectiveness of Current Fertilizer Recommendations for Irrigated Rice in Integrated Crop-Livestock Systems
Provedor de dados: 90
Autores: Carmona,Felipe de Campos; Anghinoni,Ibanor; Mezzari,Célito Pescador; Martins,Amanda Posselt; Carvalho,Paulo César de Faccio.
ABSTRACT: Irrigated rice in the state of Rio Grande do Sul (Brazil) has shown significant growth in yield in recent years due to improved management practices, especially in regard to fertilizer use. However, the response curves that led to the current fertilizer recommendations do not consider integrated systems prevailing in rice-producing regions that have adopted the practice of integrated crop-livestock systems. The aim of the present study was to evaluate the effectiveness of current fertilizer recommendations for irrigated rice in lowland soils in Rio Grande do Sul under integrated crop-livestock systems for different periods of time. The experiments were performed in the 2012/2013 growing season on four farms in the state with different forage...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Economic response to fertilization; Lowland soils.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100546

Ciclagem e balanço de potássio e produtividade de soja na integração lavoura-pecuária sob semeadura direta
Provedor de dados: 90
Autores: Ferreira,Eric Victor de Oliveira; Anghinoni,Ibanor; Andrighetti,Marcelo Hoerbe; Martins,Amanda Posselt; Carvalho,Paulo César de Faccio.
A ciclagem e balanço de nutrientes em sistemas de integração lavoura-pecuária (ILP) são processos que envolvem o componente solo, a planta e o animal, além da fertilização, em que o manejo dos animais, por alterar as condições bióticas e abióticas do solo, altera a velocidade de decomposição dos resíduos. Objetivou-se avaliar a ciclagem e o balanço de K em sistema ILP sob semeadura direta, em função da intensidade de pastejo por bovinos em pastagem, no inverno, e sua relação com a produtividade de soja, cultivada no verão. O experimento foi iniciado em maio de 2001 em Latossolo Vermelho distroférrico, em área que vinha sendo cultivada em semeadura direta desde 1991. Os tratamentos constaram de intensidades de pastejo contínuo, por bovinos jovens, em...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Intensidade de pastejo bovino; Aveia-preta + azevém; Glycine max.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000100015

Biomassa microbiana do solo em sistema de integração lavoura-pecuária em plantio direto, submetido a intensidades de pastejo
Provedor de dados: 90
Autores: Souza,Edicarlos Damacena de; Costa,Sérgio Ely Valadão Gigante de Andrade; Anghinoni,Ibanor; Lima,Christina Venzke Simões de; Carvalho,Paulo César de Faccio; Martins,Amanda Posselt.
Em sistemas de integração lavoura-pecuária, boa parte do suprimento de nutrientes para as pastagens provém das excreções dos animais, na forma de esterco e de urina, o que resulta em estímulo à atividade e ao acúmulo de nutrientes nas suas células. Este estudo foi desenvolvido num experimento de integração lavoura-pecuária em plantio direto, iniciado em 2001, e objetivou avaliar o impacto de diferentes intensidades de pastejo da pastagem de inverno (aveia-preta + azevém; 10, 20 e 40 cm, e um tratamento sem pastejo) sobre a atividade microbiana e sobre os teores e estoques de C, N e P na biomassa microbiana na camada de 0-10 cm de um Latossolo Vermelho, no Sul do Brasil, durante o ciclo da pastagem. Os teores e estoques dos nutrientes na biomassa e a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Quociente metabólico; Nitrogênio microbiano; Fósforo microbiano.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000100008

Soil aggregation in a crop-livestock integration system under no-tillage
Provedor de dados: 90
Autores: Souza,Edicarlos Damacena de; Costa,Sérgio Ely Valadão Gigante de Andrade; Anghinoni,Ibanor; Carvalho,Paulo César de Faccio; Oliveira,Eric Victor Ferreira de; Martins,Amanda Posselt; Cao,Eduardo; Andrighetti,Marcelo.
Grazing intensities can influence soil aggregation, which can be temporarily and permanently affected. The objective of this study was to evaluate the aggregate stability in water at the end of a soybean cycle and during pasture development in a crop-livestock integration system under no-tillage and grazing intensities. The experiment was initiated in 2001, in a dystrophic Red Latosol, after soybean harvest. Treatments consisted of pasture (black oat + Italian ryegrass) at heights of 10, 20 and 40 cm, grazed by young cattle, and a control (no grazing), followed by soybean cultivation, in a randomized block design. Soil samples were collected at the end of the soybean cycle (May/2007), during animal grazing (September/2007) and at the end of the grazing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Black oat; Italian ryegrass; Mean weighted diameter; Soil structure.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000400033

Calcium and Magnesium Released from Residues in an Integrated Crop-Livestock System under Different Grazing Intensities
Provedor de dados: 90
Autores: Assmann,Joice Mari; Martins,Amanda Posselt; Anghinoni,Ibanor; Costa,Sergio Ely Valadão Gigante de Andrade; Franzluebbers,Alan Joseph; Carvalho,Paulo César de Faccio; Silva,Francine Damian da; Costa,Álvaro Araujo.
ABSTRACT Under integrated crop-livestock production systems (ICLS), plant and animal residues are important nutrient stocks for plant growth. Grazing management, by affecting the numbers of both plants and animals and the quality of residues, will influence nutrient release rates. The objective of this study was to evaluate the impact of grazing intensity on Ca and Mg release from pasture, dung, and soybean residues in a long-term no-till integrated soybean-cattle system. The experiment was established in May 2001 in a Latossolo Vermelho Distroférrico (Rhodic Hapludox). Treatments were a gradient of grazing intensity, determined by managing a black oat + Italian ryegrass pasture at 10, 20, 30, and 40 cm grazing height and no-grazing (NG), followed by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mixed pasture; Animal residue; Half-life time; Nutrient cycling.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100512

Attributes of irrigated rice as affected by soil sodicity and potassic fertilizer application
Provedor de dados: 90
Autores: Carmona,Felipe de Campos; Anghinoni,Ibanor; Holzschuh,Marquel Jonas; Martins,Amanda Posselt.
Soils of the coastal plains of Rio Grande do Sul, Brazil, are affected by salinization, which can hamper the establishment and development of crops in general, including rice. The application of high doses of KCl may aggravate the crop damage, due to the high saline content of this fertilizer. This study aimed to evaluate the effect of K fertilizer management on some properties of rice plant, grown in soils with different sodicity levels, and determine which attribute is best related to yield. The field study was conducted in four Albaqualfs with exchangeable Na percentages of 5.6, 9.0, 21 and 32 %. The management of KCl fertilizer consisted of the application of 90 kg ha-1 K2O broadcast, 90 kg ha-1 K2O in the row and 45 kg ha-1 K2O in the row + 45 kg ha-1...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sodium; Potassium; Oryza sativa L.; Density; Spikelet sterility; Grain yield.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000300023

Nutrients exportation in mandarin fruits managed in an organic production system in brazilian subtropics
Provedor de dados: 94
Autores: Balerini,Fabrício; Schwarz,Sérgio Francisco; Bertol,Felipe Dalla-Zen; Martins,Amanda Posselt; Kubiszewski,Tamara Silva; Bissani,Carlos Alberto.
Abstract  The knowledge on the amount of nutrients exported by citrus fruit is an adequate tool to estimate nutrient demand reposition and this information about mandarin is very scarce. In this context, the objective of this study was to determine the nutrient content and exportation by mandarin fruits harvest, in an orchard managed under organic production system. An experiment was carried out in an organic orchard of adult mandarin trees (23 years), located in Rio Grande do Sul State (Brazil). The total content of macronutrients and micronutrients was determined in the mandarin fruits and the exportation was estimated by average yields in two seasons (2013/2014 and 2014/2015). The average exportation of macronutrient was 3.3, 2.3, 1.3, 0.4 and 0.3 kg...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Citrus deliciosa; Macronutrients; Micronutrients; Exportation; Recommendation.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000503002

Integrating the pastoral component in agricultural systems
Provedor de dados: 96
Autores: Carvalho,Paulo César de Faccio; Barro,Raquel Santiago; Barth Neto,Armindo; Nunes,Pedro Arthur de Albuquerque; Moraes,Anibal de; Anghinoni,Ibanor; Bredemeier,Christian; Bayer,Cimélio; Martins,Amanda Posselt; Kunrath,Taise Robinson; Santos,Davi Teixeira dos; Carmona,Felipe de Campos; Barros,Thiago; Souza Filho,William de; Almeida,Gleice Menezes de; Caetano,Luis Augusto Martins; Cecagno,Diego; Arnuti,Fernando; Denardin,Luiz Gustavo de Oliveira; Bonetti,João de Andrade; Toni,Cezar Augusto Gama de; Borin,José Bernardo Moraes.
ABSTRACT This paper aims to discuss the impact of the introduction of pastures and grazing animals in agricultural systems. For the purposes of this manuscript, we focus on within-farm integrated crop-livestock systems (ICLS), typical of Southern Brazil. These ICLS are designed to create and enhance the synergisms and emergent properties have arisen from agricultural areas where livestock activities are integrated with crops. We show that the introduction of the crop component will affect less the preceding condition than the introduction of the livestock component. While the introduction of crops in pastoral systems represents increasing diversity of the plant component, the introduction of animals would represent the entry of new flows and interactions...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grazing management; Integrated crop-livestock system; Sustainable intensification.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100300

Long-term nitrogen fertilization in native pasture with Italian ryegrass introduction - Effects on soil health attribute indicators
Provedor de dados: 65
Autores: Cecagno,Diego; Anghinoni,Ibanor; Costa,Sérgio Ely Valadão Gigante de Andrade; Brambilla,Daniel Martins; Martins,Amanda Posselt; Magiero,Emanuelle Cavazini; Bagatini,Tatiane; Assmann,Joice Mari; Nabinger,Carlos.
ABSTRACT: Native pastures are of great importance for cattle and sheep nutrition in the Pampa biome. However, due to its low productivity, the Italian ryegrass introduction and the nitrogen (N) fertilization are alternatives proposed to intensify livestock production in a sustainable manner. The objective of this study was to evaluate the effects of long-term N application on soil health indicators in a native pasture with Italian ryegrass introduction in southern Brazil. The experiment consists of a secondary native pasture under continuous grazing and constant herbage allowance. In 1996 experimental area was broadcast limed and the experiment was initiated, testing three N topdressing rates (0, 100 and 200kg N ha-1 year-1). In 2010 soil of experimental...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carbon and nitrogen stocks; Microbial biomass; Natural pasture.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500252

Adubarroz: a brazilian experience for fertilization and liming recommendation of irrigated rice via computational system
Provedor de dados: 65
Autores: Carmona,Felipe de Campos; Anghinoni,Ibanor; Martins,Amanda Posselt; Boeni,Madalena.
ABSTRACT: Recommendations for fertilizing irrigated rice in southern Brazil have been constantly evolving over years. In this process, the influence of factors such as the development cycle of varieties and sowing period increased. Thus, computational tools that take these and others important aspects into account can potentiate the fertilization response of rice. This study describes the computer program "ADUBARROZ". The software provides recommendations of fertilizer rates and liming requirements of irrigated rice, based on information entered by the user. The system takes various factors that regulate the crop response to fertilization into account. A final report is established with the graphical representation of input management over time.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Software; Fertilizer; Oryza sativa; Lime; Crop yield.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001101959