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| Streck,Nereu A.; Uhlmann,Lilian O.; Zanon,Alencar J.; Bisognin,Dilson A.. |
| The objective of this study was to simulate the impact of elevated temperature scenarios on leaf development of potato in Santa Maria, RS, Brazil. Leaf appearance was estimated using a multiplicative model that has a non-linear temperature response function which calculates the daily leaf appearance rate (LAR, leaves day-1) and the accumulated number of leaves (LN) from crop emergence to the appearance of the upper last leaf. Leaf appearance was estimated during 100 years in the following scenarios: current climate, +1 °C, +2 °C, +3 °C, +4 °C e +5 °C. The LAR model was estimated with coefficients of the Asterix cultivar in five emergence dates and in two growing seasons (Fall and Spring). Variable of interest was the duration (days) of the crop emergence... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solanum tuberosum; Global warming; Leaf appearance; Agricultural crops; Food security. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000400008 |
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| Ribas,Giovana G.; Streck,Nereu A.; Duarte Junior,Ary J.; Nascimento,Moises F. do; Zanon,Alencar J.; Silva,Michel R. da. |
| ABSTRACT Process-based-models can predict leaf and reproductive development of agricultural crops. The objective of this study was to calibrate and evaluate the SimulArroz model in simulating the number of leaves on the main culm and the phenology of three hybrid rice cultivars in Rio Grande do Sul, Brazil. Field experiments were conducted in Santa Maria, Cachoeirinha, Uruguaiana and Santa Vitória do Palmar, in Rio Grande do Sul state, in two growing seasons. Observations were made to determine the number of leaves in the main culm through the Haun scale and the phenology of three hybrid cultivars (PRIME CL, INOV CL and QM 1010 CL) and a conventional rice cultivar used as a control (IRGA 424). The calibration of the SimulArroz model was efficient for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Haun stage; Thermal time. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000400221 |
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| Langner,Josana A.; Zanon,Alencar J.; Streck,Nereu A.; Reiniger,Lia R. S.; Kaufmann,Marielen P.; Alves,Alexandre F.. |
| ABSTRACT The objective in this review was to discuss the importance of maize currently and the crucial role it may play in the future for food production in scenarios of water shortage, as well as the importance of conserving its landrace cultivars, which have a considerable portion of the reserve of genetic variability. Maize plants, when exposed to water deficit, may develop physiological, morphological, biochemical and anatomical adaptation mechanisms. With the aid of genetic improvement, characteristics that impart tolerance are fixed in plants through conventional methods. In this context, ‘Tuxpeño Sequia’ cultivars were developed in Mexico, while in Africa, one of the most important strategies was the development of ‘DT’ (Drought-tolerant) cultivars.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Foods; Landrace cultivars; Climate change. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000900648 |
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