Greenhouse gas balance in the conversion from extensive pasture to other agricultural systems in Andean region of Colombia

Pós-graduação em Agronomia (Ciência do Solo) - FCAV

Desempenho do capim-açú e do capim-canarana em função da adubação com nitrogênio e potássio

Pós-graduação em Agronomia (Ciência do Solo) - FCAV

Parâmetros ruminais e produtivos de cabras alimentadas com raspa de mandioca em substituição ao milho

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

Recuperação de pastagem com estilosantes Campo Grande e adubação Fosfatada

Pós-graduação em Ciência e Tecnologia Animal - FEIS

Desempenho de vacas leiteiras em pastejo de alfafa

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

Retrieval of Trichostrongylus colubriformis infective larvae from grass contaminated in winter and in spring

The survival of infective larvae (L3) of Trichostrongylus colubriformis was evaluated on Brachiaria, Coast-cross and Aruana forage grasses. Feces of sheep parasitized exclusively by T. colubriformis were deposited in winter and spring on experimental plots whose grasses were cut at two heights: 5 cm and 30 cm. One, two, four, eight, 12 and 16 weeks after depositing the feces, fecal and forage samples were collected for the retrieval and quantification of L3. Retrieval of L3 from feces and forage was negligible in winter due to the dry weather, although a few larvae were retrieved in the last larval collections. However, L3 retrieval from fecal samples was greater in spring, especially two weeks after feces were deposited on 30 cm high grasses. At this time, the L3 retrieval rate from the three forage grasses differed significantly (P < 0.05), with Aruana grass showing the highest average L3 retrieval rate, followed by Coast-cross and Brachiaria. In conclusion, the winter drought proved very unfavorable for the presence of L3 in the environment, and the microclimate of Aruana pastureland was generally the most favorable for the retrieval of infective larvae.

Andropogon grass consortium with stylo in two times: the forage response and sources of phosphorus rates

The use of legumes intercropped with forage in the Brazilian savannah (Cerrado) region is an alternative to reverse the process of pasture degradation. The natural phosphorus deficiency in this region and the high retention capacity of this nutrient in the soil are factors that directly affect the sustainability of the production system. The objective of this study was to evaluate the effect of a phosphate with medium solubility (Arad) compared to more soluble sources such as triple superphosphate and mono-ammonium phosphate, on the formation and maintenance of pastures of Andropogon gayanus with or without the introduction of Stylosantes guianensis in pasture already established in the Brazilian savannah. Two experiments were carried out under field conditions in an Oxisol using a randomized block design with split plots, plots with two sources of phosphorus (Arad and super-triple or MAP) and subplots with different levels of phosphorus. The study showed that andropogon grass, even though characterised as forage requiring low fertilization, responded to increased fertilization, especially with the use of more soluble sources of P at planting. From the second year on, with the introduction of Stylosantes guianensis, verified effects were seen on legumes in their efficiency of utilization of residual fertilization from the first year; however, this didn't affect legume dry matter production resulting from the P sources used for the andropogon grass. The mixed stands of andropogon grass and Stylosantes guianensis made it more advantageous to increase the P sources using phosphate fertilizer with lower solubility (Arad), when compared to MAP.

Socio-eco-efficiency of integrated and non-integrated systems of crop, forestry and livestock in the Ipameri city, at brazilian Cerrado

Pós-graduação em Ciências Ambientais - Sorocaba

Estudo de parâmetros climáticos como subsídio à gestão ambiental da vertente paranaense da bacia hidrográfica do rio Itararé

Pós-graduação em Geografia - FCT

Ammonia volatilization losses in Tanzania grass fertilized with urea

Gaseous losses are the main factors affecting the efficiency of nitrogenous fertilizers in pastures. To evaluate NH3-N volatilization losses in Tanzania grass fertilized with urea in autumn, spring and summer, a completely randomized design with repeated measurements over time and fifteen replicates was used. Plots were represented by urea levels (50; 100 and 150 kg ha-1 N) and subplots by time after fertilization (1; 2; 3; 6; 9; 12 and 15 days). The interaction between fertilization leveland time after urea application was significant for the accumulated NH3-N volatilization. Urea application leads to higher percentage N losses in the first three days after application. The average cumulative NH3- N loss for the three occasions (different seasons of the year) was 28%, 20% and 16% of N applied for fertilizer doses of 50; 100 and 150 kg ha-1 of N, respectively. The season of the year influenced NH3-N loss pattern and volume, with the lowest values recorded in spring, followed by summer and autumn. The cumulative NH3-N volatilization loss varies from 78 to 90% up to the third day after application of the total NNH3 loss.

Composições contendo o isolado jab 68 do fungo entomopatogênico metarhizium anisopliae e uso das composições

Essa invenção se refere ao desenvolvimento de composições com o isolado jab 68 do fungo entomopatogânico metarhizium anisopliae, em peletes de alginato de sádio, e em óleo emulsionável e pó molhável. As composições propostas são usadas no controle da mosca-dos-chifres. As composições em óleo emulsionável e pó molhável também podem ser usadas para o controle do carrapato de bovinos rhipicephalus (boophilus) microplus ou do carrapato de cães rhipicephalus sanguineus e para controle da cigarrinha da folha (mahanarva posticata) e da raiz (mahanarva fimbriolata) da cana-de-açúcar e das pastagens (deois flavopicta).

Silagens de milho consorciado com forrageira tropical e leguminosa em dietas para terminação de cordeiros

Pós-graduação em Ciência e Tecnologia Animal - FEIS

Desempenho e bem estar de bovinos Nelore na fase de recria mantidos em sistemas integrados de produção agropecuária

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Altura do pasto e suplementação na recria de tourinhos e efeitos sobre a terminação

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

Greenhouse gas emissions and N2o mitigation in beef cattle production on tropical pasture

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