We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Temperatura base para aparecimento de folhas e filocrono da variedade de milho BRS Missões.
- Authors
Streck, Nereu Augusto; Lago, Isabel; Samboranha, Flávia Kaufmann; Gabriel, Luana Fernandes; Schwantes, Ana Paula; Schons, Alfredo
- Abstract
The objective of this study was to estimate the base temperature for leaf appearance and the phyllochron of a maize variety in several sowing dates and two growing seasons. A field experiment was conducted in Santa Maria, RS, with seven sowing dates using the BRS Missões variety in two growing seasons (2005-06 and 2006-07). The experimental design was a completely randomized blocks, with six replications. Plots were three 5 m rows in a 0.8m x 0.21m spacing. Three plants in the central row of each plot were randomly tagged, and the number of fully expanded leaves (NFE) and the number of leaf tips (NFT) were counted once a week on the tagged plants. The base temperature varied with sowing date from 4.5 to 12°C and an average of about 8°C was used to calculate thermal time. Phyllochron was higher when calculated on an NFE basis than on a NFT basis, and varied with sowing date from 50.0 to 69.9°C day leaf-1 and from 39.6 to 59.8°C day leaf-1, respectively, with photoperiod being a likely cause to explain the variation in the phyllochron with sowing date.
- Subjects
EXPERIMENTAL design; SCIENTIFIC method; STATISTICAL hypothesis testing; MATHEMATICAL optimization; ANALYSIS of variance; PLANTING; PLANT propagation
- Publication
Ciência Rural, 2009, Vol 39, Issue 1, p224
- ISSN
0103-8478
- Publication type
Article
- DOI
10.1590/S0103-84782009000100035