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| Figueira, Adriana França; Universidade Federal Rural do Rio de Janeiro; Berbara, Ricardo Luis Louro; Universidade Federal Rural do Rio de Janeiro; Pimentel, João Pedro; Universidade Federal Rural do Rio de Janeiro. |
| Estudou-se a comunidade de nematoides do solo em quatro sistemas de manejo no Sistema Integrado de Produção Agroecológica (SIPA): pasto, capoeira, figo com Paspalum notatum e horta. As amostras de solo foram coletadas a cada quatro meses durante um ano. A comunidade de nematoides foi identificada e descrita com os parâmetros: riqueza de famílias, diversidade de Shannon-Weaner, de dominância de Simpson, além da diversidade trófica e dominância trófica. Os fitoparasitas e bacteriófagos dominaram as comunidades de nematoides nas áreas. Os onívoros foram menos abundantes em todos os sistemas estudados. O sistema pasto apresentou maior diversidade de famílias de nematoides enquanto que, no sistema capoeira se encontraram valores de diversidade baixos, porém... |
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Palavras-chave: Termo1 Solos; Termo2 agronomia Microfauna; Sistemas de cultivo; Diversidade Microfauna; Crop system; Diversity. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4716 |
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| Borghi,Emerson; Crusciol,Carlos Alexandre Costa; Trivelin,Paulo Cesar Ocheuze; Nascente,Adriano Stephan; Costa,Ciniro; Mateus,Gustavo Pavan. |
| Nitrogen is required in large amounts by plants and their dinamics in corn and perennial forages intercropped is little known. This study analyzed the efficiency of nitrogen fertilization (15NH4NO3) applied after corn grain harvest to palisadegrass (Brachiaria brizantha cv. Marandu) in intercrops sown at two times, as well as the N residual effect on the subsequent corn crop. The field experiment was performed in Botucatu, São Paulo State, in southeastern Brazil, on a structured Alfisol under no-tillage. The experiment was arranged in a randomized block design in a split plot scheme with four replications. The main plots consisted of two intercropping systems (corn and palisadegrass sown together and palisadegrass sown later, at corn top-dressing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Brachiaria brizantha; Crop system; Sustainability. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000500011 |
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| Cordeiro,Carlos F. dos S.; Echer,Fábio R.; Pires,Lucas H. T.; Creste,José E.. |
| ABSTRACT Castor bean is an important raw material to produce biofuel in Brazil and can be grown in several regions of the country due to its good adaptation and tolerance to high temperatures and water deficit. The objective of this study was to evaluate the productivity of castor bean plants intercropped at different plant densities with Urochloa ruziziensis. The experiment was conducted in a randomized block design with four replications, using a 4 × 2 factorial arrangement, consisting of four plant densities (13,574, 24,512, 36,816, and 40,723 plants ha-1) of castor bean and two crop systems (single crop, and intercrop with Urochloa ruziziensis). The data were subjected to analyses of variance and regression, and means were compared by the Tukey’s test... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ricinus communis L.; Crop system; Second crop; Soil conservation; Intercrop. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000200109 |
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| Rauber,Luiz Paulo; Andrade,Andréia Patrícia; Friederichs,Augusto; Mafra,Álvaro Luiz; Baretta,Dilmar; Rosa,Márcio Gonçalves da; Mafra,Maria Sueli Heberle; Correa,Juliano Corulli. |
| ABSTRACT Studies of the successive application of manure as fertilizer and its combined effect with long-term soil management systems are important to the identification of the interdependence of physical attributes. The aim of this study was to evaluate changes in the physical properties of a Rhodic Kandiudox under management systems employing successive applications of pig slurry and poultry litter, and select physical indicators that distinguish these systems using canonical discriminant analysis (CDA). The systems consisting of treatments including land use, management and the application time of organic fertilizers are described as follows: silage maize under no-tillage (NT-M7 years); silage maize under conventional tillage (CT-M20 years); annual... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crop system; Organic fertilization; Soil quality. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000400354 |
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