Yield performance of taro (Colocasia esculenta L.) cultivated with topdressing nitrogen rates at the Zona da Mata region of Minas Gerais
Palabras clave:
Colocasia esculenta L., fertilização, produtividade, uréiaResumen
Response of taro to amount of nitrogen applied and time of application has been the subject of discussion. The
objective of this study was to evaluate the effect of nitrogen topdressing on taro yield. Two experiments were conducted
in Oratórios - MG from September 2010 to July 2011 (Year 1) and from September 2011 to July 2012 (Year 2). Both
experiments were arranged in a randomized block design, with four replications. The treatments consisted of five N rates
(0; 40; 60; 80 and 160 kg ha-1) applied as topdressing at urea form. The corms of Japanese clone (BGH 5925) were planted
in the 0.90 x 0.30 m spacing. In the two experimental years, yield increased in almost all corm classes with the increase in
N rates. The estimated maximum yields of marketable corms were 22.23 Mg ha-1 in Year 1 and 9.81 Mg ha-1 in Year 2, with
109 and 118 kg ha-1 of N, respectively. The total number of corms per plant was similar in both years (16.45 corms/plant
in Year 1 and 17.76 corms/plant in Year 2). Unmarketable corms represented 35.32 and 46.51% of the total per plant, in Year
1 and Year 2, respectively, indicating less corm growth in Year 2. The curve of taro response to topdressing N rates was
similar in the two years and, the estimates were influenced by the difference in rainfall between the years. With the
management of nitrogen fertilization, the maximum yield of marketable taro corms was achieved with N rates varying from
109 to 118 kg ha-1.
Citas
Heredia Zarate NA, Vieira MC& Bratti R (2004). Produção dos tarôs ‘Chinês’ e ‘Macaquinho’ em função de diferentes doses de uréia. Ciência e agrotecnologia, 28:552-560.
Heredia Zarate NA, Vieira MC, Graciano JD, Giuliani AR, Helmich M & Gomes HE (2009). Produção e renda bruta de quatro clones de taro cultivados em Dourados, Estado do mato Grosso do Sul. Acta Scientiarum Agronomy, 31:301-305.
Oliveira FL, Guerra JGM, Almeida DL, Ribeiro RLD, Silva EE, Silva VV & Espindola JAA (2008). Desempenho de taro em função de doses de cama de aviário, sob sistema orgânico de produção. Horticultura Brasileira, 26: 149-153.
