Initial growth characteristics of two coffee cultivars under different water regimes and levels of NPK fertilization
DOI:
https://doi.org/10.5433/1679-0359.2013v34n6Supl1p3141Keywords:
Coffea Arabica, Localized irrigation, Chemigation, Formation phase.Abstract
The experiment objectified to evaluate the effects of water regimes (irrigation and no irrigation) and fertigation, combined with fertilizer doses for N, P and K, during the initial growth phase of two coffee cultivars, Obatã and IAPAR-59, in the north-western region of the state of Paraná, Brazil. The experimental design was the completely randomized in a split-plot arrangement. The main plots were represented by fertilizer doses, corresponding to 15, 30, 45 and 60 g m-1, for N and K, and to 3, 6, 9 and 12 g m-1, for P, which are equivalent, respectively, to percentages of 50%, 100%, 150% and 200% of the dose recommended for each nutrient. The sub-plots were constituted by lines of plants that received the water regimes. Were evaluated stalk diameter, length of the first plagiotropic branch and its number of inter-knots. The treatments were analyzed separately for each cultivar of coffee. Fertigation and irrigation favored the initial growth of both coffee cultivars. For the IAPAR-59 cultivar, the number of inter-knots was upper only with fertigation. The number of inter-knots increased with irrigation and decreased in no irrigation regime, linearly, for IAPAR-59 and Obatã, respectively, in function of the NPK doses increasing. In fertigation, it was observed reduction of stalk diameter at doses higher than the lowest dose tested, for IAPAR-59, while the largest number of inter-knots was obtained with the highest dose used, for Obatã.
Downloads
Published
How to Cite
Issue
Section
License
Semina: Ciências Agrárias adopts the CC-BY-NC license for its publications, the copyright being held by the author, in cases of republication we recommend that authors indicate first publication in this journal.
This license allows you to copy and redistribute the material in any medium or format, remix, transform and develop the material, as long as it is not for commercial purposes. And due credit must be given to the creator.
The opinions expressed by the authors of the articles are their sole responsibility.
The magazine reserves the right to make normative, orthographic and grammatical changes to the originals in order to maintain the cultured standard of the language and the credibility of the vehicle. However, it will respect the writing style of the authors. Changes, corrections or suggestions of a conceptual nature will be sent to the authors when necessary.
