Tasa de crecimiento y rendimiento de genotipos de pasto guinea sometidos a estrés hídrico

The main objective of the work was to evaluate the growth rate and yield of guinea grass genotypes subjected to water stress. The treatments were made up of three genotypes (Mombaza, Zuri and Criollo) and four states of water stress that were E1 (water stress until the plants show leaf wilting and then normal irrigation), E2 (water stress until the plants show yellowing in 50% of the foliage and then normal watering), E3 (hydric stress until the plants stop growing and then normal watering) and E4 (irrigation at field capacity throughout the experiment cycle). A completely randomized design was used with an A x B factorial arrangement, with 12 treatments, three replicates and 36 experimental units. The main variables recorded were plant dry weight (PDW), number of tillers (NT), leaf area (LA) and daily growth rate (DGR). The data were analyzed through ANOVA and the separation of means with Tukey's test (α ≤ 0.05). The results detected significant statistical differences (p<0.05) for the factors genotype and stress states, while the interaction between genotypes x water stress states was not statistically influenced (p>0.05) by the evaluated treatments. The Criollo genotype was more tolerant to water stress in relation to the Mombaza and Zuri genotypes, presenting better PDW, NT, LA and DGR under these conditions. On the contrary, the Mombaza and Zuri cultivars under irrigation conditions show higher PDW, NT, LA and DGR in contrast to the Criollo cultivar. Regardless of the cultivar, the treatment with normal irrigation (E4) achieved the highest averages of PDW, NT, LA and DGR, followed by the state of less severe water stress (E1). On the contrary, the most intense water stress states (E2 and E3) were more affected by the soil moisture deficit, presenting the lowest averages for PDW, NT, LA and DGR.

• Үндсэн зохиолч: Carbo Pacheco, Gema Jossenka (author)
• Бусад зохиолчид: Cedeño Ganchozo, Álvaro Joel (author)
• Формат: bachelorThesis
• Хэл сонгох: spa
• Хэвлэсэн: 2023
• Нөхцлүүд: Megathyrsus maximus; Cultivares; Agobio hídrico; Crecimiento; Productividad
• Онлайн хандалт: http://repositorio.espam.edu.ec/handle/42000/2071