SciELO - Scientific Electronic Library Online

 
vol.26 issue1The effect of auxins on rooting of Andean blueberry (Vaccinium meridionale Swartz) cuttings in different substratesComparative quantification of abscisic acid and cytokinins on tuberization process in Solanum tuberosum L. and Solanum phureja Juz. et Buk. author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Article

Indicators

Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google

Share


Agronomía Colombiana

Print version ISSN 0120-9965

Abstract

CARRANZA, Carlos et al. A simple simulation model of dry matter distribution in broccoli (Brassica sp.) variety Coronado and cabbage (Brassica oleracea) hibrid Delus cultivated in Bogotá plateau. Agron. colomb. [online]. 2008, vol.26, n.1, pp.23-31. ISSN 0120-9965.

The experiment was carried out in the Agricultural Center Marengo of the National University of Colombia located on the km 12 route Bogotá-Mosquera with coordinates 4° 42’ N 74° 12’ W, at 2,516 m a.s.l. 13.7 ºC average temperature, 669.9 mm/year precipitation, 4.2 h daily light. Three plots with 300 m2 each one, with 8.3 and 11.1 plants/m2 for broccoli and cabbage, respectively, were applied with water of the district The Ramada. The samplings were realized every 8 days with 7 and 8 samplings for broccoli and cabbage, respectively. Leaf area, dry weight, hours of light and average temperature were measured. The light hours were transformed in photosynthetically active radiation (PAR). Deterministic multiplicative mathematical model was used taking into account the following components: Photosynthetic active radiation (PAR), fraction of intercepted light (FLINT), which depends on the leaf area index and, the coefficient of extinction parameter k, and the parameter light use efficiency (LUE). The entire plant dry weight and its partition among the plant organs were simulated by the method of integration of Euler. Parameters k as 0.5120 and 0.5052, and LUE as 0.2289 and 0.1181 g·MJ-1 were estimated for broccoli and cabbage, respectively. The percentage of dry weight distributed during the vegetative and reproductive stages were 32.72 and 30% in the stem, 45.28 and 30% in the leaves, and 22 and 17.83% in the root. In cabbage, the dry weight distribution was 28.41% in the stem, 65.28% in the leaves, and 6.31% in the root.

Keywords : simulation; extinction coefficient; light use efficiency.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License