Anthurium (Anthurium andraeanum Lind.) is one of the important cut flowers in the global tropical cut flower market (Pizano, 2005). Recently it has become a popular cut flower in Taiwan, and its cultivation acreage and yield have increased steadily (Chang et al., 2010; Peng, 2003). Nutrient supply is one of the key factors affecting the growth and yield of Anthurium cut flowers (Chang et al., 2010; Dufour and Guérin, 2005; Higaki et al., 1992; van Herk et al., 1998). The optimal nutrient supply depends on a number of factors including medium composition, species, growing stage, and climate (Cardarelli et al., 2010; Gómez-López et al., 2006; Mengel and Kirkby, 2001). Higaki and Poole (1978) and Higaki et al. (1992) studied fertilization effects on A. andraeanum Lind. ‘Ozaki’ with different media in Hawaii and found that the optimal nutrient supply for Anthurium depended on the medium. The nutrient solution formulae recommended by Dufour and Guérin (2005) and van Herk et al. (1998) for the cultivation of Anthurium were different. Dufour and Guérin (2005) and Higaki et al. (1992) also found that the effects of various nutrient solutions on Anthurium flower yield were different, although the observed difference in flower yield was less than one flower per year (Higaki et al., 1992) or two flowers per year (Dufour and Guérin, 2005).
Development and growth of Anthurium were significantly affected by seasonal fluctuations (Klapwijk and van der Spek, 1988; van Herk et al., 1998) and the nutrient requirements were dependent on climatic conditions (Fallovo et al., 2009; Mirdehghan and Rahemi, 2007; Rouphael et al., 2008). However, the interaction between fertilization management and seasonal fluctuations on growth, flower yield, and nutrient uptake of Anthurium during year-round cultivation is not clear.
Coir is an important substrate for economical horticultural cultivation and is used around the world as a result of its availability, low cost, and environmentally friendly characteristics (Handreck, 1993; Merrow, 1994; Noguera et al., 2000). Coir is used as a medium in the hydroponic cultivation of Anthurium in Taiwan (Chang et al., 2010) and is a new source for cut flower production around the world. However, no information is available concerning the nutrient requirements of Anthurium cultivated in coir under seasonal fluctuations. The objective of this study was to determine the influences of various N concentrations on the growth and nutrient uptake of Anthurium cultivated in coir under subtropical seasonal fluctuations.
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