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Calcium and Magnesium Released from Residues in an Integrated Crop-Livestock System under Different Grazing Intensities

Joice Mari Assmann, Amanda Posselt Martins, Ibanor Anghinoni, Sergio Ely Valadão Gigante de Andrade Costa, Alan Joseph Franzluebbers, Paulo César de Faccio Carvalho, [...]

01/Apr/2017

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 […]

Soil Fertility and Electrical Conductivity Affected by Organic Waste Rates and Nutrient Inputs

Davi Lopes do Carmo, Laís Botelho de Lima, Carlos Alberto Silva

01/Aug/2016

ABSTRACT The composition of organic waste (OW) and its effect on soil processes may change soil fertility and electrical conductivity (EC). The side effects of waste use in crop fertilization are poorly understood for Brazilian soils. This study examined the effect of the addition of 15 different organic wastes to Oxisols and a Neosol on pH, base saturation, EC, cation exchange capacity (CEC at pH 7), and the availability of Al, macro (P, K, Ca2+, Mg2+ and S) and micronutrients […]

Cover Crops Effects on Soil Chemical Properties and Onion Yield

Rodolfo Assis de Oliveira, Gustavo Brunetto, Arcângelo Loss, Luciano Colpo Gatiboni, Claudinei Kürtz, Vilmar Müller, [...]

06/Jun/2016

ABSTRACT Cover crops contribute to nutrient cycling and may improve soil chemical properties and, consequently, increase crop yield. The aim of this study was to evaluate cover crop residue decomposition and nutrient release, and the effects of these plants on soil chemical properties and on onion (Allium cepa L.) yield in a no-tillage system. The experiment was carried out in an Inceptisol in southern Brazil, where cover crops were sown in April 2012 and 2013. In July 2013, shoots of […]

CROP RESIDUE DECOMPOSITION AND NUTRIENT MINERALIZATION IN SOIL WITH DIFFERENT TEXTURES

Henrique José Guimarães Moreira Maluf, Emanuelle Mercês Barros Soares, Ivo Ribeiro da Silva, Júlio César Lima Neves, Lucas de Oliveira Guimarães Silva

01/Dec/2015

ABSTRACT The sustainability of conservation farming systems is closely linked to return of nutrients to the soil through decomposition of crop residues. The aim of this study was to evaluate decomposition of crop residues and nutrient mineralization in soils with different textures over a 175-day incubation period. The experimental design consisted of a 6 × 4 × 5 factorial arrangement – six treatments, composed of four crop residues (corn, brachiaria, common bean, and Stylosanthes) and two controls, both without residues, […]

NUTRIENT AVAILABILITY AND RECOVERY FROM CROP RESIDUES IN SOIL WITH DIFFERENT TEXTURES

Henrique José Guimarães Moreira Maluf, Emanuelle Mercês Barros Soares, Ivo Ribeiro da Silva, Júlio César Lima Neves, Mailson Félix de Oliveira Silva

01/Dec/2015

ABSTRACT Crop residues on the soil surface not only provide physical protection but may release significant amounts of nutrients to the soil through decomposition. However, the availability of these nutrients to plants has not been sufficiently studied. The aim of this study was to evaluate the total contents of organic C and N, pH, and the availability and recovery rate of P, K, Ca, Mg, and S from the biogeochemical cycling of different crop residues over time in built soils […]

Nitrogen Supply For Summer Crops Through Early Application In Ryegrass Grazed By Sheep

Rubens Cherubini Alves, Carolina Bremm, Cleist Luiz Ribeiro Nunes, Raquel Santiago Barro, Armindo Barth, Radael Marinho Tres Schons, [...]

01/Sep/2015

ABSTRACT Greater nitrogen (N) cycling is sought through Integrated Crop-Livestock Systems (ICLS). The aim of this study was to evaluate the effect of early fertilization of nitrogen applied to ryegrass grazed by sheep on the nitrogen nutrition index (NNI) of summer crops in ICLS. This study was carried out in a long-term protocol managed in the winter under two stocking methods, continuous and rotational, and two grazing intensities, moderate and low, with four replications. In summer, the area was divided […]

Sustainability of Wood Productivity of Pinus Taeda Based on Nutrient Export and Stocks in the Biomass and in the Soil

Ricardo Michael de Melo Sixel, José Carlos Arthur, José Leonardo de Moraes Gonçalves, Clayton Alcarde Alvares, Gabriel Ramatis Pugliese Andrade, Antonio Carlos Azevedo, [...]

01/Sep/2015

ABSTRACT The impact of intensive management practices on the sustainability of forest production depends on maintenance of soil fertility. The contribution of forest residues and nutrient cycling in this process is critical. A 16-year-old stand of Pinus taeda in a Cambissolo Húmico Alumínico léptico (Humic Endo-lithic Dystrudept) in the south of Brazil was studied. A total of 10 trees were sampled distributed in five diameter classes according to diameter at breast height. The biomass of the needles, twigs, bark, wood, […]

NUTRIENT RELEASE FROM FORAGE STRAW INTERCROPPED WITH MAIZE AND FOLLOWED BY SOYBEAN

Veridiana Zocoler de Mendonça, Luiz Malcolm Mano de Mello, Marcelo Andreotti, Cristiano Magalhães Pariz, Élcio Hiroyoshi Yano, Francisco Cezar Belchor Lages Pereira

01/Jan/2015

In tropical regions there is rapid decomposition of plant material deposited on the soil, and the ability to recycle nutrients through this decomposition is one of the most important aspects of cover crops. The aim of this study was to evaluate the yield and nutrient release from forage crops intercropped with maize for silage, and soybean in succession. The study was conducted in the experimental area of Universidade Estadual Paulista, Ilha Solteira campus, Brazil. The experiment consisted of maize for […]