Correlación de la productividad de un forraje con las propiedades físicas de un Ultisol en Aquidauana

Montanari, Rafael; Lima, Eduardo do Valle; Lovera, Lenon Henrique; Godoy, Luis Tadeu Rios; Henrique, Andre Felipe; Dalchiavon, Flávio Carlos

doi:10.1590/s0034-737x2013000100015

Cited by 8 publications

(14 citation statements)

References 15 publications

(36 reference statements)

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“…In contrast, Lima et al (2010a) found data with low to medium variability. Montanari et al (2013), studying Ultisols under signalgrass pasture, found CV values for gravimetric moisture from 10.9 to 13.8 %, which corroborates our study.…”

Section: Resultssupporting

confidence: 91%

“…With respect to SPR (Table 1), the mean values at depths were ranked by Arshad et al (1996) as high (SRP1) and very high (SRP2), and were thus in agreement with the values observed by Montanari et al (2013) at the second depth. Since the soil surface layer has intense water loss through evaporation and sand content is high in the assessed soil, low values for gravimetric moisture (GM) were expected and proved to be similar to those found by Montanari et al (2013).…”

Section: Resultssupporting

confidence: 71%

“…Since the soil surface layer has intense water loss through evaporation and sand content is high in the assessed soil, low values for gravimetric moisture (GM) were expected and proved to be similar to those found by Montanari et al (2013).…”

Section: Resultsmentioning

confidence: 54%

“…In Brazil, soil degradation and low yield indices of grazing areas merit special attention from agronomists and farmers (Montanari et al, 2013). In the Cerrado (Brazilian tropical savanna), grazing areas under inadequate management have led to soil degradation by compaction and loss of fertility.…”

Section: Introductionmentioning

confidence: 99%

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Aspects of the Silvopastoral System Correlated With Properties of a Typic Quartzipsamment (Entisol) in Mato Grosso Do Sul, Brazil

Corrêa

Montanari

Laura

et al. 2015

Rev. Bras. Ciênc. Solo

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In Brazil, grazing mismanagement may lead to soil and pasture degradation. To impede this process, integrated cropping systems such as silvopasture have been an effective alternative, allied with precision agriculture based on soil mapping for site-specific management. In this study, we aimed to define the soil property that best sheds light on the variability of eucalyptus and forage yield. The experiment was conducted in the 2011/12 crop year in Ribas do Rio Pardo, Mato Grosso do Sul State, Brazil. We analyzed linear and spatial correlations between eucalyptus traits and physical properties of a Typic Quartzipsamment at two depths (0.00-0.10 and 0.10-0.20 m). For that purpose, we set up a geostatistical grid for collection at 72 points. Gravimetric moisture in the 0.00-0.10 m layer is an important index of soil physical quality, showing correlation to eucalyptus circumference at breast height (CBH) in a Typic Quartzipsamment. With an increase in resistance to penetration in the soil surface layer, there is an increase in eucalyptus height and in neutral detergent fiber content in the forage crop. From a spatial point of view, the height of eucalyptus and the neutral detergent fiber of forage can be estimated by co-kriging analysis with soil resistance to penetration. Resistance to penetration values above 2.3 MPa indicated higher yielding sites.

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Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 71%

Section: Resultsmentioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

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Aspects of the Silvopastoral System Correlated With Properties of a Typic Quartzipsamment (Entisol) in Mato Grosso Do Sul, Brazil

Corrêa

Montanari

Laura

et al. 2015

Rev. Bras. Ciênc. Solo

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“…O Brasil possui 220 milhões de hectares de pastagens, sendo a gramínea predominante a do gênero Brachiaria, com 55% de B. decumbens, que apresenta boa adaptação, principalmente às áreas de Cerrado, bioma no qual a qualidade química do solo é mais deficiente (Montanari et al, 2013). Contudo, com o tempo, nem mesmo essas forrageiras rústi-cas têm conseguido bom desenvolvimento nesses solos, pois o consumo da massa verde pelo animal, a falta de reposição dos nutrientes, a acidificação do solo, a perda da maté-ria orgânica e a compactação do solo diminuem a eficiência das pastagens (Moreira et al, 2005;Pariz et al, 2011).…”

Section: Introductionunclassified

Produção de matéria seca da braquiária de acordo com os atributos químicos de um Latossolo em Selvíria, Mato Grosso do Sul

et al. 2013

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Dry matter production of braquiaria due to the chemical properties of an oxisol in Selvíria, Mato Grosso do Sul, BrazilRustic forages as the signal-grass are predominant in areas of Cerrado in extensive livestock systems that favor soil degradation. However, with time, not even these forages can have a good development in those areas. The objective of this study was to analyze the variability of plant and soil attributes; to define the linear and spatial correlations between signal-grass yield and the chemical attributes of the studied soil, and to evaluate, among the chemical attributes of the soil, which one that best explain the variability in this forage yield. The experiment was conducted in an area that had been under pasture for more than 30 years, belonging to UNESP -Ilha Solteira Campus, located in Selvíria -MS. A geostatistical grid was installed in an oxisol, for soil and plant data collection, with 121 sampling stations, consisted of eleven transections with 160 m width in the direction of the Cartesian axes. The dry mass yield Forrageiras rústicas, como as braquiárias, são predominantes na região do Cerrado, no sistema de pecuária extensiva, que favorece a degradação do solo. Entretanto, com o tempo, nem mesmo essas forrageiras conseguem bom desenvolvimento nessas áreas. O objetivo deste trabalho foi analisar a variabilidade dos atributos estudados da planta e do solo; definir as correlações lineares e espaciais entre a produtividade do capim-braquiária com os atributos químicos do solo pesquisado, e pesquisar, dentre os atributos químicos do solo, aquele que melhor se apresente para explicar a variabilidade da produtividade dessa forrageira. A pesquisa foi desenvolvida em uma área manejada com pastagem há 30 anos, na Fazenda de Ensino, Pesquisa e Extensão (FEPE) da Faculdade de Engenharia de Ilha Solteira -UNESP, em Selvíria -MS. Foi instalada a malha geoestatística num Latossolo Vermelho aluminoférrico, para a coleta de dados do solo e da planta, contendo 121 pontos amostrais, constituídos de 11 transeções, com 160 m de largura, na direção dos eixos cartesianos. A produção de massa de matéria seca de capim-braquiária foi baixa, apresentando alta variação. Os atributos MSr, N, PB, MO1, MO2, pHa1, pHa2, pHk1 e pHk2 não variaram aleatoriamente e apresentaram variabilidade dos dados entre baixa e alta, e seguiram padrões espaciais bem definidos, com alcances entre 17,7 e 162,9 m. Houve correlação linear significativa a 1% entre a MSr e o N, e entre MSr e a PB. A existência dos semivariogramas cruzados MSr=f(N) e MSr=f(PB) atestou que essa matéria seca pode ser estimada a partir dos dados do teor de nitrogênio foliar e proteína bruta dessa forrageira.Palavras-chave: fertilidade do solo, teor de N foliar, proteína bruta, agricultura de precisão, krigagem, Brachiaria decumbens.

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Optimization of somatic embryogenesis and in vitro plant regeneration of Urochloa species using picloram

Takamori

Neto

Vieira

et al. 2015

In Vitro Cell.Dev.Biol.-Plant

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The establishment of an efficient methodology for regeneration in Urochloa spp. via somatic embryogenesis is an essential component of genetic engineering technology. The aim of this study was to evaluate different concentrations of growth regulators on callus induction, somatic embryogenesis, and plant regeneration of Urochloa spp. using mature seeds as the initial explant. Firstly, different concentrations (1, 2, 4, and 8 mg/L) of 2,4-D or picloram were tested using U. brizantha cv. Marandu. In a second step, the above concentrations of picloram were also used to evaluate its effect on the morphogenetic potential in different genotypes: U. brizantha cvs. Xaraés and Piatã, U. decumbens cv. Basilisk, U. humidicola cv. Llanero, and U. ruziziensis cv. Ruziziensis. There was no significant difference between concentrations of 2,4-D or picloram for the production of primary calluses in U. brizantha cv. Marandu, ranging from 58.5 to 69.2%. However, embryogenic calluses induced under picloram showed higher percentage of shoot formation after transferring to MS medium with 2 mg/L BA. A higher number of shoots were produced in mature seed cultures of U. decumbens cv. Basilisk and U. brizantha cvs. Marandu and Xaraés supplemented with 1 mg/L picloram. No albino plants were regenerated using picloram. The successful regeneration of green and morphologically normal plants opens the possibility of using this protocol to obtain transgenic plants in Urochloa spp.

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Correlación de la productividad de un forraje con las propiedades físicas de un Ultisol en Aquidauana

Cited by 8 publications

References 15 publications

Aspects of the Silvopastoral System Correlated With Properties of a Typic Quartzipsamment (Entisol) in Mato Grosso Do Sul, Brazil

Aspects of the Silvopastoral System Correlated With Properties of a Typic Quartzipsamment (Entisol) in Mato Grosso Do Sul, Brazil

Produção de matéria seca da braquiária de acordo com os atributos químicos de um Latossolo em Selvíria, Mato Grosso do Sul

Optimization of somatic embryogenesis and in vitro plant regeneration of Urochloa species using picloram

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