Resumo

CASTAGNINO, Ana M; SASTRE VASQUEZ, Patricia  e  MENEST, Atoine. Behavior of a green asparagus crop at different densities initiated by the tradiotional system of crowns. Agronomía Trop. [online]. 2006, vol.56, n.1, pp.111-127. ISSN 0002-192X.

For an asparagus bed to be able to reach optimal yield and produce high quality spears, it is essential to perform a good plantation and choose an adequate density. The aim of this paper is to study the effect of two planting densities performed in two plantations using crowns. Planting was done on 12/09/2003 using crowns of about 100 g, with the following densities: D1= 25,000 pl ha^-1 and D2= 17,857 pl ha^-1 corresponding to the following planting frames 1,6 x 0,25 and 1,6 x 0,35, respectively. This paper reports results of the first harvest performed in 2005. Total fresh weight harvested was evaluated, as well as spear number and thickness for each harvest, following USDA norms. The lowest density produced 202 kg ha^-1 harvest^-1, while the highest density produced 167 kg ha^-1 harvest^-1, corresponding 4,844 kg ha^-1 (a) for density 1 and 4,008 kg ha^-1 (b) for density 2. These results may be due to the fact that although it was a young plantation, plants were given the necessary time to develop a good rooting system and therefore in its first year the crop results exhibited competition according to density. Concerning the number of spears produced per plant, the lowest density yielded 13 spears that weighed a total of 225 g, whereas the highest density produced 9 spears that weighed 179 g. A greater proportion of M spears, followed by S and L were obtained.

Palavras-chave : Crowns; planting frame; initiation system.

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