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| Fagundes,Joelma Dutra; Streck,Nereu Augusto; Bisognin,Dilson Antônio; Schwantes,Ana Paula; Alberto,Cleber Maus. |
| The objective of this study was to simulate potato (Solanum tuberosum) tuber yield in different climate change scenarios of increased carbon dioxide concentration [CO2] and air temperature, considering symmetric and asymmetric increases in minimum and maximum daily air temperatures. Spitters model was used to simulate Asterix cultivar tuber yield considering two growing seasons (spring and fall) recommended for Santa Maria, state of Rio Grande do Sul, Brazil. In each growing season, five planting dates were evaluated in climate scenarios of a hundred years with no increase in [CO2] and temperature (current scenario), and in scenarios with doubling [CO2] and temperature increases of 0, 1, 2, 3, 4, 5 and 6ºC. A symmetric increase of 4ºC and an asymmetric... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solanum tuberosum; Global warming; Carbon dioxide concentration; Phenology; Climate risk simulation. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010000400002 |
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| Streck,Nereu Augusto; Lago,Isabel; Bosco,Leosane Cristina; Paula,Gizelli Moiano de; Oliveira,Felipe Brendler; Gabriel,Luana Fernandes; Schwantes,Ana Paula. |
| Panicle differentiation (DP) is a key developmental stage in rice (Oryza sativa L.) because at this stage plant switches from vegetative to reproductive development and source-sink relation changes to allocate part of the photoassimilates for growing spikelets and kernels. The objective of this study was to determine the main stem Haun Stage (HS) and the number of leaves that still have to emerge until flag leaf at PD in several cultivated rice genotypes and red rice biotypes in different sowing dates. A two-year field experiment was conducted in Santa Maria, Rio Grande do Sul State, Brazil, during the 2005-2006 and 2006-2007 growing seasons, and three sowing dates each year. Nine cultivated rice genotypes and two red rice biotypes were used. PD was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa L.; COUNCE scale; Haun Stage; Crop management; Flag leaf. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000200008 |
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| Streck,Nereu Augusto; Gabriel,Luana Fernandes; Samboranha,Flavia Kaufmann; Lago,Isabel; Schwantes,Ana Paula; Schons,Alfredo. |
| The Wang and Engel (WE) model simulates crop development considering the non-linear response of plant development to temperature. Daily air temperature is the input for the temperature response function [f(T)] in the WE model, and because there are several approaches for computing daily temperatures, there are several ways to calculate the f(T). The objective of this study was to compare two versions of the WE model for simulating leaf number and developmental stages in maize, considering two approaches for imputing daily air temperature (daily mean air temperature and daily minimum/maximum air temperature). A two-year field experiment with the maize variety BRS Missões sown in several sowing dates was conducted in Santa Maria, Rio Grande do Sul State,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crop models; Zea mays; Leaf number; Phenology. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000300003 |
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| Streck,Nereu Augusto; Lago,Isabel; Samboranha,Flávia Kaufmann; Gabriel,Luana Fernandes; Schwantes,Ana Paula; Schons,Alfredo. |
| O objetivo deste trabalho foi estimar a temperatura base para aparecimento de folhas e o filocrono em uma variedade de milho em várias datas de semeadura e dois anos de cultivo. Um experimento de campo foi realizado em Santa Maria, Rio Grande do Sul (RS), com sete datas de semeadura. Foi utilizada a variedade BRS Missões em dois anos agrícolas consecutivos (2005-06 e 2006-07). O delineamento experimental foi blocos ao acaso com seis repetições. A parcela foi composta por três linhas de 5m de comprimento no espaçamento 0,8m x 0,21m. Em cada parcela, foram marcadas ao acaso três plantas na linha central nas quais foi realizada semanalmente a contagem do número de folhas completamente expandidas (NFE) e o total (NFT). A temperatura base variou entre épocas de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Desenvolvimento; Fenologia; Soma térmica; Graus-dia. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000100035 |
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