Initial growth characteristics of two coffee cultivars under different water regimes and levels of NPK fertilization

Semina: Ciências Agrárias

Celso Helbel Júnior¹  Renan Soares de Souza²  Rafael Verri Tavore²  André Maller²  André Ribeiro da Costa²  Paulo Sérgio Lourenço de Freitas²  Roberto Rezende² 

[1] Instituto Agronômico do Paraná;Universidade Estadual de Maringá;

关键词: Coffea Arabica;    Localized irrigation;    Chemigation;    Formation phase;   

DOI  :  10.5433/1679-0359.2013v34n6Supl1p3141

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown