Memoria para optar al Título Profesional de Ingeniero Agrónomo Mención fruticultura / Con el propósito de mantener la producción de vides "Red Globe" que han disminuido sus rendimientos progresivamente en el tiempo, se realizó un estudio en la temporada 2010-2011, en un parronal ubicado en la localidad el Tránsito, Región de Atacama, III Región. Para los pequeños y medianos productores, con dificultades para acceder a financiamiento para realizar replantar la unidad productiva, la generación de nuevo material productivo desde los brazos podría ser una alternativa de mejorar la condición de las plantas. El estudio consistió en la realización de 3 tipos de injertos en los brazos de la vid, para así permitir una renovación de material vegetativo y evitar las replantaciones, que obligan a un periodo improductivo. Para esto, se seleccionaron 30 plantas al azar que recibieron el mismo manejo técnico durante la temporada, y se procedió a injertar con tres técnicas: hendidura y astilla, realizados durante el receso invernal, y T-leñoso, ejecutado en el periodo de plena floración. Cada tipo de injerto constituye un tratamiento. Se evaluó el prendimiento de los injertos, brotación inicial y largo de brotes al final de la temporada. En todos los tratamientos sólo se observó formación de callo, ya que no hubo prendimiento ni brotación de éstos. Al fracaso de los injertos se puede atribuir varios factores, tales como haber sido realizados en plantas muy adultas (mayores a 15 años), díficiles condiciones ambientales del lugar, y realización inadecuada de las labores post injertación. De acuerdo a las condiciones en que se realizó el ensayo, se puede concluir que la ejecución de injertos, como técnica de renovación de material en plantas adultas de vid no es factible en el lugar de estudio, debido a las características de las plantas y condiciones climáticas del lugar. / A study was done on a table grapes vineyard during the 2010-2011 season, in El Tránsito, Región de Atacama III Region of Chile, with the aim of keeping of "Red Globe" vines whose yield has progressively decreased throughout the years. For small and medium growers, with financy difficulties for a complete replanting of the production unit, the generation of new vegetation from the branches could be a faster alternative for improving the plant condition. Three types of grafting were done on the branches vine. Thirty plants were random chosen a which received the same treatment and technical management during the season, and assigned 3 types of graft: cleft grafting and chip budding, done during dormancy and Tbudding, done in the middle of the flowering period. Grafting success, bud break and asoots length by the end of the season were evoluted. It only was observed callus formation was observed in all treatments, and no shoots or sign from grafts. Several factors could explain grafting failure, plants were too old (aged more than fifteen), environmental conditions extremely day and post grafting management not properly properly. Under the conditions in which this test was done, it can be concluded that grafting on adult plants are not feasible in the locality of the study, as a technique to renew the plant material, due to the plant characteristics and the weather conditions of the geography area.

Memoria para optar al título profesional de Ingeniero Agrónomo / Two grafting techniques, the hole insertion (or terminal) and one cotyledon (or slant) grafting methods, were evaluated in two watermelon (Citrulluslamatus Thunb,) Mansf.) cultivars grafted on two commercial roootstocks (Lagenaria spp. Ser. and Cucurbitamaxima x C. moschata) through the survival of plants obtained 30 days following grafting and under simulated commercial nursery conditions so as to determine which of the techniques was more suitable for such conditions. A completely randomized design with two treatments which included the above grafting methods was used. Four independent experiments were carried out, each of them made up of a different rootstockcultivar combination. The Delta and Santa Amalia cvs. were used as scions and a Lagenaria spp. cultivar, known as Aurora, and a Cucurbitamaxima x C. moschata hybrid, called Tetsukabuto, were used as rootstocks. Mean survival rates for the four experiments were 58, 74, 60 and 36% for the plants grafted with hole insertion and 3, 0, 2 and 5% for those grafted with the one cotyledon graft technique. It was concluded that, for the conditions studied in the four experiments, plant survival depends on the grafting technique used, the hole insertion technique being more successful in the number of surviving plants. / Two grafting techniques, the hole insertion (or terminal) and one cotyledon (or slant) grafting methods, were evaluated in two watermelon (Citrulluslamatus Thunb,) Mansf.) cultivars grafted on two commercial roootstocks (Lagenaria spp. Ser. and Cucurbitamaxima x C. moschata) through the survival of plants obtained 30 days following grafting and under simulated commercial nursery conditions so as to determine which of the techniques was more suitable for such conditions. A completely randomized design with two treatments which included the above grafting methods was used. Four independent experiments were carried out, each of them made up of a different rootstockcultivar combination. The Delta and Santa Amalia cvs. were used as scions and a Lagenaria spp. cultivar, known as Aurora, and a Cucurbitamaxima x C. moschata hybrid, called Tetsukabuto, were used as rootstocks. Mean survival rates for the four experiments were 58, 74, 60 and 36% for the plants grafted with hole insertion and 3, 0, 2 and 5% for those grafted with the one cotyledon graft technique. It was concluded that, for the conditions studied in the four experiments, plant survival depends on the grafting technique used, the hole insertion technique being more successful in the number of surviving plants.