Determinación del crecimiento radicular de Coriandrum sativum en relación con sus niveles de competencia

Abstract

The present work of investigation innovation generated new data that revealed the true nature on the relations of interaction between the different vegetal individuals that inhabit in an ecosystem, the relation of importance for this work is the competition, this relation is present interspecifically and intraspecifies, is generated and regulated by the availability of resources in the substrate, competition is generated against rival plants, but studies show that this competition must be limited when the rival species are of the same genetic lineage (Falik, O 2003); This research is based on recognizing: the variation of root growth between plants of the same genus, the root growth of individuals who share resources when planted in the same container and compare them with the average root growth of individuals sown in isolation (the methodology used is modified from the work of Dudley, S. in 2007 using isolated and shared masetas), to analyze these levels of competence were planted in the greenhouse of the Francisco José De Caldas District University in the Faculty of natural resources and environment individuals of the genus coriandrum sativum as our study plant, and competing plants of the same Apiaceae taxonomic family were selected seeds of celery (Apium graveolens), parsley (Petroselinum crispum) and carrot (Daucus carota), as competing plants of different family, lettuce (Lactuca sativa) belonging to the family Asteraceae and spinach (Spinacia oleracea) of the Chenopodiaceae family, the sowing of control individuals was carried out in individual seedbeds and the sowing of the treatment of an individual of coriandrum sativum, in competition with an individual of each species to be compared; 30 repetitions of each treatment were planted, the controls and the treatments were organized in 10 blocks with a random distribution, the variable to analyze is the increase or decrease of the radicular mass in accordance with the presence of competitors. All the treatments remained in growth for a period of 77 days with a constant irrigation as it was considered necessary due to the temperature conditions of the environment, an analysis of the Kaplan-Meier test was made and allowed to recognize that there is a greater survival in the sown individuals with their relatives of the same genus and species Coriandrum sativum, followed by the survival of the treatments that competed with their same family, the lowest survival rates were obtained in the treatments that subjected the plants of Coriandrum sativum to a competition with individuals of different taxonomic family, although these results are inclined to appreciate a recognition of discrimination of close relatives, the statistical analysis of root weights show that there is no significant variation of the treatments (Dudley, 2007, O'Brien, 2005). Of the surviving treatments, 5 repetitions were randomly selected in each treatment; the samples were obtained by making a cut at ground level, the size measurements were taken (stem and leaves) and number of leaves, the root samples were dried in an oven at 80 ° C for 24 hours, the dried root biomass was Weighed in an analytical balance, the obtained data were analyzed by means of the Excel statistical tool and statistical IBM SPSS Statistics Viewer, the evidence shows that statistically there is no significant variation in the root growth of the plants subjected to the different treatments and it is concluded that aspects such as the spatial arrangement of the root zone of each plant should be reviewed (Cahill, J, 2003), as well as the time to achieve a complete development of the vegetative organs.