Araméndiz Tatis, HermesGuerrero Muñoz, EstefanyÁlvarez Guerrero, José Armando2023-07-122023-07-122023-07-10https://repositorio.unicordoba.edu.co/handle/ucordoba/7418This research was carried out with rice seeds from the Mojana region, which is characterized as a large producer of rice by small, medium and large producers. The aim of our project was to evaluate the effect of temperature oscillations on the physiological quality of the seeds of the creole variety LV, for which a completely randomized design with a 2x3 factorial arrangement + a seed control was applied. The first factor corresponds to day temperature: 30°C, 35°C and 40°C. And the second factor to night temperature: 20°C and 25°C and the seed control without temperature oscillations; with four replications; the seeds of each treatment were maintained for 12 hours at a day temperature and subsequently, a night temperature was applied for 12 hours and this cycle was repeated for 48 hours. The analysis of variance recorded significant and highly significant differences for plant height, root length and dry mass for the effects of day temperature. Whereas, for night temperature, there was no significance for plant height. The interaction of daytime and nighttime temperature showed significant differences for germination speed index and highly significant for dry mass. Emergence was not affected by temperature variations. However, it can be concluded that under temperature oscillations rice seed quality was affected in its vigor and this can have consequences in the establishment of a crop.RESUMEN ............................................................................................................... 9ABSTRAC .............................................................................................................. 10INTRODUCCIÓN ................................................................................................... 111. FORMULCIÓN DEL PROBLEMA ...................................................................... 132. JUSTIFICACIÓN ................................................................................................ 153. MARCO TEORICO ............................................................................................ 173.1 DEFINICIÓN DE SEMILLA .............................................................................. 173.2 ALMACENAMIENTO DE SEMILLA ................................................................. 173.3 CATEGORÍAS DE SEMILLAS DE ACUERDO CON SU COMPORTAMIENTO AL ALMACENAMIENTO ........................................................................................ 183.3.1 Semillas ortodoxas. ....................................................................................... 193.3.2 Semillas recalcitrantes. ................................................................................. 193.3.3 Semillas intermedias. .................................................................................... 193.4 MÉTODOS DE ALMACENAMIENTO DE SEMILLAS ...................................... 203.4.1 Almacenamiento abierto. .............................................................................. 203.4.2 Almacenamiento cálido con control de humedad. ......................................... 203.4.3 Almacenamiento en frío. ............................................................................... 213.4.4 Almacenamiento frio-húmedo. ...................................................................... 213.5 RECIPIENTES UTILIZADOS CONVENCIONALMENTE PARA ALMACENAR SEMILLAS ............................................................................................................. 213.5.1 Materiales plenamente permeables a la humedad y los gases. .................... 213.5.2 Materiales completamente impermeables, cuando están cerrados herméticamente, a la humedad y los gases. .......................................................... 223.5.3 Materiales resistentes a la humedad, pero no totalmente impermeables. .... 223.6 FACTORES AMBIENTALES QUE INFLUYEN EN LA VIABILIDAD DE LA SEMILLA ALMACENADA. ..................................................................................... 233.6.1 Temperatura y humedad. .............................................................................. 233.6.3 Condición del grano. ..................................................................................... 244.OBJETIVOS ........................................................................................................ 254.1 OBJETIVO GENERAL ..................................................................................... 254.2 OBJETIVOS ESPECIFICOS ............................................................................ 255. HIPOTESIS ........................................................................................................ 266. METODOLOGÍA ................................................................................................ 276.1 LOCALIZACIÓN ............................................................................................... 276.2 TIPO DE INVESTIGACIÓN.............................................................................. 276.3 POBLACIÓN Y MUESTRA .............................................................................. 276.4 VARIABLES ..................................................................................................... 286.4.1 Variables independientes .............................................................................. 286.4.2 Variables dependientes ................................................................................. 286.5 DISEÑO EXPERIMENTAL............................................................................... 296.6 PROCEDIMIENTO ........................................................................................... 296.7 TECNICAS E INSTRUMENTO DE PROCESAMIENTO DE DATOS ............... 317. RESULTADOS Y DISCUSIÓN ........................................................................... 327.1 EFECTOS DE LAS OSCILACIONES DE TEMPERATURA EN LA CALIDAD FISIOLÓGICA DE LA SEMILLA ............................................................................. 327.1.1 Índice de Velocidad de Germinación (IVG). .................................................. 337.1.2 Emergencia (EM). ......................................................................................... 367.1.3 Altura de planta (AP). .................................................................................... 377.1.4 Longitud de raíz (LR). ................................................................................... 387.1.5 Masa seca (MS). ........................................................................................... 398. CONCLUSIONES ........................................................................................ 41REFERENCIAS ..................................................................................................... 42application/pdfspaCopyright Universidad de Córdoba, 2023Trabajo de grado - Pregradoinfo:eu-repo/semantics/openAccessAtribución-NoComercial-SinDerivadas 4.0 Internacional (CC BY-NC-ND 4.0)Calidad de plántulaEmergenciaFisiología de semillasVigor de semillasSeedling qualityEmergenceSeed physiologySeed vigor