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University of Zagreb (2019)

Irrigation and fertigation effect on number and quality of flowers of african marigold (Tagetes erecta L.)

Pavlušec Jelena

Titre : Irrigation and fertigation effect on number and quality of flowers of african marigold (Tagetes erecta L.)

Utjecaj navodnjavanja i fertirigacije na broj i kvalitetu cvjetova afričke kadifice (Tagetes erecta L.)

Auteur : Pavlušec Jelena

Université de soutenance : University of Zagreb

Grade : Master’s Thesis (magistar/ magistra inženjer/inženjerka hortikulture) 2019

Résumé
African marigold (Tagetes erecta L.) is native to the hot and dry regions of North and South America and is considered a drought resistant plant. Despite the fact that marigold is considered drought-resistant, the occurrence of climate change increases water demands and therefore the need for irrigation. The aim of the study was to determine the impact of different levels of irrigation and fertigation on growth, development and quality indicators (plant overhead, plant height, number of leaves, buds and inflorescences, fresh inflorescence, dry inflorescence and dry inflorescence) grown in a greenhouse. The study was conducted in a SUZAF greenhouse, with three plants within one irrigation variant, in three replicates (27 plants in total). A Pinova agro-meteorological station and an automated irrigation system have been set up. Via computer application, data from the meteorological station for air temperature, relative humidity and solar radiation were used, with the coefficient applicable for marigold, to calculate daily evapotranspiration for determination of daily need for plant irrigation. The factors observed were irrigation and fertigation, set as 33 %, 66 %, and 100 % of ET and marigold requirement for fertigation (using the Poly-Feed 9-12-39 + 3MgO + ME). Results show that trial variant with irrigation with 100 % ET and 100 % of the fertigation requirements for marigold, is statistically justified due to the development of greater mass of the aboveground part of the plant, more leaves, buds and inflorescences per plant. Therefore, we can conclude that for the cultivation of marigold in a greenhouse, optimal irrigation is 100 % ET and fertigation with 100 % of marigold requirements, in order to achieve optimal flowering quality and higher market value

Présentation : Croatian Digital Theses Repository (CDRT)

Page publiée le 15 mai 2022