74 documents found, page 1 of 8
Evaluation of traditional methods for estimating lime requirement in Brazilian ...
Teixeira, Welldy Gonçalves; Alvarez V., Víctor Hugo; Neves, Júlio César Lima; Paulucio, Rodrigo BazzarellaThe optimal soil pH for most annual crops in Brazil varies between 5.7 and 6.0. Numerous methods have been developed for estimating lime requirement (LR), but they vary widely in their predictions and fail to raise pH to desired values for optimum crop production in the highly weathered soils of Brazil. The objectives of this study were to (i) compare seven traditional methods for estimating LR in Brazilian soi...
Clonal teak litter in tropical soil: decomposition, nutrient cycling, and bioch...
Cavalcante, Valéria Santos; Santos, Márcio Luiz dos; Cotta, Luisa Carla; Neves, Júlio César Lima; Soares, Emanuelle Mercês BarrosLitter decomposition dynamics and nutrient release are also dependent on their biochemical composition, and such information is important for adequate nutritional management but is still incipient for plants like teak. This study aimed to evaluate the decomposition dynamics, nutrient release, and biochemical composition of clonal teak litter. The study was conducted in areas of clonal teak stands, in São José d...
New methods for estimating lime requirement to attain desirable pH values in Br...
Teixeira, Welldy Gonçalves; Alvarez V., Víctor Hugo; Neves, Júlio César LimaIn Brazil, empirical models are traditionally used to determine lime requirement (LR), but their reliability is doubtful in most cases, since they can lead to under- or overestimation of LR for different soil types. In this study, the most critical characteristics influencing LR were selected to develop reliable models for predicting LR that raise soil pH to optimum values for crop production in Brazil. Soil sa...
Universality of Kenworthy and DRIS norms for prata and cavendish bananas grown ...
Filho, Vagner Alves Rodrigues; Neves, Júlio César Lima; Donato, Sérgio Luiz Rodrigues; Guimarães, Bruno Vinícius CastroTissue analysis results are interpreted by comparing them with nutrient standards; however, using universal standards may lead to a misleading nutritional diagnosis. This study aimed to evaluate the degree of universality of Kenworthy and DRIS norms for irrigated ‘Prata-Anã’ (AAB) and ‘Grande Naine’ (AAA) banana plants grown in two environments. The study was carried out using a database containing leaf nutrien...
Establishment of critical nutrient levels in soil and plant for eucalyptus
Neto, Antonio João de Lima; Neves, Júlio César Lima; Martinez, Herminia Emilia Prieto; Sousa, Jailson Silva; Fernandes, Loane VazThe adoption of more productive and nutrient-demanding genotypes, in addition soils with low availability of nutrients of soils under forest plantations, lead high fertilizer demand and justify research that seeks to rationalize the use of these inputs. Therefore, we aimed with this research to determine classes of interpretation of soil fertility using boundary line (BL) and estimate macronutrient sufficiency ...
Nutrient partition and nutritional efficiency of mango cv. Palmer as a function...
Silva, Roberto Lustosa; Fontes, Renildes Lucio Ferreira; Neves, Júlio César Lima; Lima, Augusto Miguel Nascimento; Soares, Emanuelle Mercês BarrosKnowing the accumulation of nutrients in mango plants is essential for calibrating fertilization programs aiming to increase yield in nutritionally unbalanced orchards. The work aimed to evaluate mango nutritional efficiency through nutrient accumulation and partitioning in plants of Palmer cultivar grown in sand soils at São Francisco Valley, Northwest Brazil. Commercial orchards located in Bahia and Pernambuc...
Manejo de colheita e adubação fosfatada na cultura da erva-mate (Ilex paraguari...
Santin, Delmar; Benedetti, Eliziane Luiza; Barros, Nairam Félix de; Fontes, Lucas Leandro; Almeida, Igor Carvalho de; Neves, Júlio César LimaAs sucessivas colheitas na base de folhas (FO) e galhos finos (GF), sem a necessária reposição nutricional, têm proporcionado quedas na produtividade brasileira de erva-mate nos últimos 20 anos. Neste sentido, o objetivo do trabalho foi avaliar a influência do intervalo de colheita e da adubação fosfatada na disponibilidade de fósforo (P) no solo, na produtividade e no estado nutricional da erva-mate. O experim...
Linha de fronteira e chance matemática na determinação do estado nutricional de...
Deus, José Aridiano Lima de; Almeida, Edmilson Igor Bernardo; Corrêa, Márcio Cleber de Medeiros; Crisostomo, Lindbergue Araujo; Neves, Júlio César LimaCom o presente trabalho objetivou-se avaliar, através dos métodos linha de fronteira e chance matemática, o estado nutricional de pitaias submetidas a combinações de doses crescentes de nitrogênio-potássio (N-K) e fósforo-zinco (P-Zn). Foram aplicadas cinco doses de N (0; 150; 300; 450 e 600 mg dm-3) e K (0; 75; 150; 225 e 300 mg dm-3) no experimento I, e cinco doses de P (0; 75; 150; 255 e 300 mg dm-3) e Zn (0...
Produtividade de minicepas e enraizamento de miniestacas de híbridos de Eucalyp...
Freitas, Alex Ferreira de; Paiva, Haroldo Nogueira de; Xavier, Aloisio; Neves, Júlio César LimaO objetivo deste trabalho foi avaliar a produtividade de minicepas e o enraizamento de miniestacas de clones híbridos de Eucalyptus globulus em resposta a concentrações de nitrogênio em fertirrigação de minijardim clonal. Para isso, utilizaram-se cinco clones, sendo: dois clones de Eucalyptus urophylla x Eucalyptus globulus (C-04 e C-16); dois clones de Eucalyptus grandis x Eucalyptus globulus (C-26 e C-30) e u...
Nodulation, growth and soybean yield in response to seed coating and split appl...
Soares, Marcos Morais; Sediyama, Tuneo; Neves, Júlio César Lima; Santos Júnior, Hamilton Carvalho dos; Silva, Laércio Junio daO fósforo é um dos nutrientes mais importantes para a soja, porém apresenta uma dinâmica complexa no solo e pode tornar-se indisponível. A aplicação parcelada e localizada desse nutriente pode ser tática eficiente para aumentar sua disponibilidade. Assim, objetivou-se avaliar o efeito do parcelamento da dose de P aplicada ao solo e do recobrimento das sementes com fosfato de sódio monobásico na nodulação, no cr...