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Streck,Nereu Augusto. |
Response functions used in crop simulation models are usually different for different physiological processes and cultivars, resulting in many unknown coefficients in the response functions. This is the case of African violet (Saintpaulia ionantha Wendl.), where a generalized temperature response for leaf growth and development has not been developed yet. The objective of this study was to develop a generalized nonlinear temperature response function for leaf appearance rate and leaf elongation rate in African violet. The nonlinear function has three coefficients, which are the cardinal temperatures (minimum, optimum, and maximum temperatures). These coefficients were defined as 10, 24, and 33ºC, based on the cardinal temperatures of other tropical... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Temperature; Model; Leaf growth; Leaf development; African violet. |
Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000100009 |
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Tafoya,Felipe Ayala; Juárez,Moisés Gilberto Yáñez; Orona,Carlos Alfonso López; López,Raymundo Medina; Alcaraz,Teresa de Jesús Velázquez; Valdés,Tomás Díaz. |
ABSTRACT: Black shading nets are widely used in the protected cultivation of vegetables as a technique for controlling light and temperature, while the colored shading nets, with special optical properties to improve the use of solar radiation, appeared recently in the agricultural plastics market. Light quality transmitted by gray, aluminized, pearl, blue, red and black (control) nets with 30% shade was evaluated, as well as its effects on photosynthetic properties and fruits production of cucumber plants. Treatments (shade nets) were established under a randomized complete block design with four repetitions. The red net transmitted 23.7 and 40.3% more photosynthetic photon flux density (400 to 700nm) and red light (600 to 700nm) and the blue net... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis sativus L.; Light transmission; Photosynthetic responses; Leaf growth; Fruit production.. |
Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000900200 |
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