Existe poca información sobre láminas de riego y de sustratos adecuados para la propagación de romero bajo invernadero, que permitan al productor aprovechar la capacidad productiva total de la planta. Bajo condiciones de estrés, el romero limita la producción de biomasa seca y fresca. Se evaluó el efecto de dos sustratos y diferentes láminas de riego en la propagación del romero. Se realizó un diseño experimental completamente al azar con diez tratamientos, producto de la combinación de cinco láminas de riego (coeficientes multiplicadores de la evapotranspiración 0,6; 0,8; 1; 1,2 y 1,4) y dos sustratos: suelo negro (SN) y mezcla de suelo negro y cascarilla de arroz quemada (ME); cada tratamiento tuvo cuatro repeticiones para un total de 40 unidades experimentales (UE). El mejor coeficiente (lámina) para la propagación de esquejes de romero fue uno. El mejor sustrato para la propagación de romero es ME en proporción 1:1 en volumen. El sustrato ME presentó una mayor eficiencia en el uso del agua (EUA) que el suelo negro de páramo. Una mayor cantidad de agua generó mayor longitud de ramas. La mayor producción de biomasa fresca y seca, se obtuvo con la aplicación del coeficiente de riego de uno y el sustrato ME.

The present study aimed to establish the preliminary diagnosis and recommendation integrated system (DRIS) norms for the rubber tree clone FX3864 (Hevea brasiliensis) under the conditions of the Colombian Eastern Plains for the elements N, P, K, Ca, Mg, Na, S, Fe, Cu, Zn and B. For this purpose, 77 foliar samples were taken from a 10-to 12-year-old commercial crop. The element ratios that contributed the greatest variance between high-and low-productivity populations were selected for conversion into norms. Of the 132 possible ratios, 66 were selected, with ratios including P/N, N/K and NXCa proving most important. The most limiting nutrients were K and N when deficient and Ca and S when in excess.

Rosemary seedlings are obtained by vegetative propagation because the seeds present low viability. Despite being an expanding crop, there is little information on water consumption during the propagation stage. Water levels and irrigation frequencies were therefore applied using a completely randomised design having a 4 x 2 factorial arrangement. The first factor concerned irrigation frequency (4 and 8 days) and the second concerned water level (0.6, 0.8, 1.0 and 1.2 evaporation inside the greenhouse). A 1.0 coefficient combined with 4-day irrigation frequency presented the best results regarding height (39.3 cm), fresh weight, dry weight and branch length (146 cm). Water level affected the fresh and dry weight of leaves regardless of frequency. Relative water content in leaves did not present differences due to environmental conditions minimising treatment effect. Rooting percenttage showed no significant differences regarding irrigation frequency or water level. Irrigation frequency did not affect rosemary growing pattern because sphagnum retains high moisture content. The best branch number (34) was obtained with 1.0 coefficient and 4-day frequency, this being important from the production point of view because this is the material which is sold. Water management changes photoassimilate distribution in rosemary plants.