Banca de DEFESA: RENATO MACHADO FERREIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : RENATO MACHADO FERREIRA
DATE: 19/08/2022
TIME: 16:00
LOCAL: plataforma digital
TITLE:

Alternative substrates for minicuttings of ornamental plants.

KEY WORDS:

 cuttings; substrate; propagation.

PAGES: 56
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Floricultura, Parques e Jardins
SPECIALTY: Parques e Jardins
SUMMARY:

With the decline in citrus production, real estate speculation and lack of policy for the fruit growing sector, the productive arrangement in the region changed, especially in the municipality of Itaboraí. Known as a dormitory city for being very close to the capital, the rural area, the large properties, gave way to small properties and other production models were installed. Among them, family farming with fruit and annual crops and floriculture, this has also gained strength and has already placed the municipality as the second producer of forage flowers in the State, however the activity still suffers from the lack of technology, technical assistance, knowledge of the reality and potential of the sector by the financing agents, do not allow the activity to advance. Having knowledge of some practices used for the production of seedlings by local producers, we observed the possibility of setting up an experiment to evaluate the development of three plant species – Ixora coccinea L. var. compact, Lantana camará and Bougainvillea spectabillis, in three rooting beds: phenolic foam, organic substrate and clay, the latter commonly used in the region, so that the final result is a product that offers greater optimization of the production of seedlings of sustainable way. The experiment was carried out at Horto Estação Verde, located on the road from Montevidiu, Pacheco – Itaboraí/RJ. The species were chosen due to the common characteristics presented among them, such as rusticity, fast growth, color varieties, which gives these plants a high ornamental value, being widely used in landscape projects. Semi-woody mini cuttings of 15 cm were used, with 3 to 6 buds with a bevel cut at the top and bottom. The cuttings of “mini ixora”, “lantana camará” and “bougainvillea”, were disinfected in a sanitizing solution of hypochlorite at a dilution of 1:4 and the leaves were removed. The experiment was carried out in a greenhouse, using a randomized block design, with three experimental units with 10 cuttings per experimental unit X 3 species, X 3 substrates, totaling 270 cuttings. No growth regulators were used. Irrigation was by microsprinkler, in 4 shifts of 3 minutes each, with a volume of 8 mm/day. The mini cuttings were collected at two different locations. After 92 days after planting, the variables were evaluated - the number of live cuttings, number of cuttings with sprouting, number of rooted cuttings, number of roots per cuttings, length of the largest root and number of sprouting of each cutting. The plant species used in the experiment presented different performances in relation to the types of substrates used for rooting. It was observed for the parameter “rooted cuttings”, that the treatments related to the Ixora species, on any of the substrates tested, did not achieve rooting success. This fact may be associated with the physiology of the ixora variety used in the assay. However, the “rooted cuttings” results of Lantana camara; and Bougainvillea spectabillis, indicate the possibility that organomineral and phenolic foam substrates are alternatives to clay, as they do not differ statistically. Considering that the use of clay has environmental consequences in view of its mineral extraction, alternative sustainable substrates should gain more incentives in research.

 

 

 

BANKING MEMBERS:
Presidente - 2186690 - JOAO SEBASTIAO DE PAULA ARAUJO
Externo ao Programa - 385682 - RICARDO MOTTA MIRANDA - UFRRJExterno à Instituição - TARCISIO RANGEL DO COUTO - UFF