Ruzigrass affecting soil-phosphorus availability

The objective of this work was to evaluate the effectiveness of ruzigrass (Urochloaruziziensis) in enhancing soil-P availability in areas fertilized with soluble or reactive rock phosphates. The area had been cropped for five years under no-till, in a system involving soybean, triticale/black-oat, and pearl millet. Previously to the five-year cultivation period, corrective phosphorus fertilization was applied once on soil surface, at 0.0 and 80 kg ha-1 P2O5, as triple superphosphate or Arad rock phosphate. After this five-year period, plots received the same corrective P fertilization as before and ruzigrass was introduced to the cropping system in the stead of the other cover crops. Soil samples were taken (0-10 cm) after ruzigrass cultivation and subjected to soil-P fractionation. Soybean was grown thereafter without P application to seed furrow. Phosphorus availability in plots with ruzigrass was compared to the ones with spontaneous vegetation for two years. Ruzigrass cultivation increased inorganic (resin-extracted) and organic (NaHCO3) soil P, as well as P concentration in soybean leaves, regardless of the P source. However, soybean yield did not increase significantly due to ruzigrass introduction to the cropping system. Soil-P availability did not differ between soluble and reactive P sources. Ruzigrass increases soil-P availability, especially where corrective P fertilization is performed.

Soil nitrogen dynamics after Brachiaria desiccation

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Manejo do pasto de capim-marandu e suplementação com diferentes fontes de energia na recria de tourinhos Nelore

Pós-graduação em Zootecnia - FCAV

Efeito da cobertura do solo com palhiço de cana-de-açúcar na emergência de monocotiledôneas infestantes em campo

Pós-graduação em Agronomia (Agricultura) - FCA

Desempenho técnico e econômico da produção de milho e sorgo para silagem e soja em sucessão em sistema irrigado de integração lavoura-pecuária no cerrado

Pós-graduação em Agronomia - FEIS

Acúmulo e desaparecimento de forragem e variações na estrutura de pastos de capim-xaraés submetidos a intensidades de pastejo em lotação intermitente

The aim of this study was to evaluate the effects of residual leaf area index (rLAI), years of evaluation and grazing cycles on the accumulation and disappearance of forage, and changes in the pasture structure of xaraes palisadegrass submitted to grazing intensities and intermittent stocking in two summers. The experiment was carried out at the Faculdade de Ciencias Agrarias e Veterinaria of Unesp, Campus of Jaboticabal, SP and the intensities of grazing were defined by four rLAI: 0.8, 1.3, 1.8 and 2.3. When the canopy intercepted 95% of incident light, the animals were placed on the pasture for grazing and kept until the rLAI target has been reached. Pastures were grazed by non-lactating Holstein cows (Bos Taurus Taurus L.), using the technique of mob-stocking. It was evaluated the canopy height, accumulation, disappearance and morphological components of forage and rest period. Residual leaf area index from 1.3 to 1.8 are the best in the accumulation and disappearance of forage and pasture structure. It is observed variability of the accumulation and disappearance of forage and pasture structure for years of assessment and grazing cycles within each year.

Upland rice under no-tillage preceded by crops for soil cover and nitrogen fertilization

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Nitrogen budget in a soil-plant system after brachiaria grass desiccation

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Análise isotópica (Delta15N) e química do capim-marandu adubado com ureia e cama de frango e diferido

Pós-graduação em Zootecnia - FMVZ

Corn production for silage intercropped with forage in the farming-cattle breeding integration

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Composição específica e distribuição da comunidade de macrófitas aquáticas no reservatório de aimorés

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Plantas de cobertura para o noroeste do estado de São Paulo

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Análise isotópica (delta 15N), produtividade e composição química do capim-marandu adubado com uréia e cama de frango

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Methane emission by Nellore cattle subjected to different nutritional plans

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Reproductive site selection in the leaf-frog Phyllomedusa azurea Cope, 1862 (Anura: Hylidae) in altered areas of the Brazilian Cerrado

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)