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Campinas, Brazil

Ghini R.,Embrapa Meio Ambiente | Hamada E.,Embrapa Meio Ambiente | Pedro Jr. M.J.,IAC APTA SAA | Goncalves R.R.V.,University of Campinas
Summa Phytopathologica | Year: 2011

Risk analysis of climate change on plant diseases has great importance for agriculture since it allows the evaluation of management strategies to minimize future damages. This work aimed to simulate future scenarios of coffee rust (Hemileia vastatrix) epidemics by elaborating geographic distribution maps using a model that estimates the pathogen incubation period and the output from three General Circulation Models (CSIRO-Mk3.0, INM-CM3.0, and MIROC3.2.medres). The climatological normal from 1961-1990 was compared with that of the decades 2020s, 2050s and 2080s using scenarios A2 and B1 from the IPCC. Maps were prepared with a spatial resolution of 0.5 × 0.5 degrees of lat itude and longitude for ten producing states in Brazil. The climate variables used were maximum and minimum monthly temperatures. The maps obtained in scenario A2 showed a tendency towards a reduction in the incubation period when future scenarios are compared with the climatological normal from 1961-1990. A reduction in the period was also observed in scenario B1, although smaller than that in scenario A2. Source


Barbosa E.A.A.,University of Campinas | Arruda F.B.,IAC APTA SAA | Pires R.C.M.,IAC APTA SAA | da Silva T.J.A.,ICAT UFMT | Sakai E.,IAC APTA SAA
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2013

The objective of this study was evaluate the effect of irrigation and fertigation with mineral fertilizer and vinasse applied by subsurface drip irrigation, in the number of tiller, stem yield, technological quality of sugarcane and yield of recoverable sugar in first three cycles of ratoon cane. The treatments were: T1NI - cultivation without irrigation with mineral fertilization; T2I - cultivation fertigated with mineral fertilizers; T3Iv - cultivation fertigated with the vinasse supplying K and complementation of NP with mineral fertilizer; T4IV - cultivation fertigated with the vinasse supplying NPK. In the cycle of the first ratoon cane, there was no effect of treatments on the variables, already in the subsequent cycles, the T2I and T3Iv showed higher numbers of tillers, 17.4 and 17.2 tiller m-1, in the second ratoon cane and 16.6 and 16.0 tiller m-1 in the third ratoon cane, respectively. The stem yield was amended with the T4IV obtaining the higher yield, 179.6 Mg ha-1, in the second ratoon cane, and the T2I and T3Iv in the third ratoon cane, 151.5 and 151.0 Mg ha-1, respectively. There was no treatment effect on the technological quality and in the second ratoon cane the T3Iv and T4IV showed higher yield of sugar, 25 and 25.9 Mg ha-1, respectively. Source


Barbosa E.A.A.,University of Campinas | Arruda F.B.,IAC APTA SAA | Pires R.C.M.,IAC APTA SAA | da Silva T.J.A.,ICAT UFMT | Sakai E.,IAC APTA SAA
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2012

This study aimed to evaluate the effect of subsurface drip irrigation and the application of stillage and nutrients in some agronomic parameters, stem yield, technological characteristics of sugarcane and yield of theoretical recoverable sugar. The experiment was carried out in completely randomized block design with four treatments and five replications. The treatments were: mineral fertilizers without irrigation; irrigation and fertigation with NPK using mineral fertilizers; irrigation and fertigation with stillage supplying the K and complementation of N and P with mineral fertilizers; and irrigation and fertigation with stillage supplying the NK and complementation of P with mineral fertilizer. The system of irrigation adopted was the subsurface drip irrigation. The irrigated treatments showed higher number of tillers and leaf área index, when compared to rainfed cultivation. The fertigation with stillage supplying the K promoted higher Brix and stem yield when compared to non-irrigated cultivation. The irrigation and fertigation with stillage supplying the NK promoted higher yield of theoretical recoverable sugar, when compared the cultivation without irrigation. Source

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