Banca de DEFESA: ISAAC ALVES DA SILVA FREITAS

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : ISAAC ALVES DA SILVA FREITAS
DATE: 03/03/2023
TIME: 14:00
LOCAL: SALA 22, PRÉDIO DA PROPPG
TITLE:

Productivity and economic efficiency of carrot and sweet potato roots under different mixtures of hairy woodrose and roostertree biomass

KEY WORDS:

Caatinga, Daucus carota L., Ipomoea batatas, cultivo orgânico, adubação alternativa.

PAGES: 100
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUMMARY:

The objective of this work was to evaluate agronomically and economically the production of carrot and sweet potato roots, since they are two tuberous crops, when fertilized with different amounts of equitable mixtures of hairy woodrose (Merremia aegyptia) and roostertree (Calotropis procera), which are spontaneous species of the Caatinga biome, in two cultivation cycles. Four experiments were carried out, which were conducted between the years 2020 and 2022, the first being carrot cultivation, with the first cycle being from December 2020 to April 2021, and the second cycle from September 2021 to January 2022; In the sweet potato crop, the first cycle took place from October 2021 to March 2022, and the second cycle was from March 2022 to July 2022. All experiments were carried out at the Rafael Fernandes experimental farm, belonging to the Universidade Federal Rural do Semi-Árido (UFERSA). The experimental design used was given in five randomized blocks with five treatments. The treatments used consisted of equitable mixtures of hairy woodrose and roostertree biomass incorporated into the soil, at doses of 16, 29, 42, 55 and 68 t ha-1 on a dry basis. fertilization (absolute control). The maximum agronomic efficiencies for the carrot crop were 44.96 t ha-1 of total productivity, 40.27 t ha-1 of commercial productivity, 18.71 t ha-1 of long roots productivity and 19.03 t ha-1 in the productivity of medium roots when incorporated the amounts of green manures of 50.69; 48.87, 52.56 and 47.08 t ha-1. For the sweet potato crop the values were 41.11 and 34.57 t ha-1 in the total and commercial productivity of roots in the amounts of fertilizers of 46.32 and 46.97 t ha-1. The values of maximum economic efficiency for carrots and sweet potatoes were R$ 74, 324.27 and R$ 44, 352.89 ha-1 for net income, respectively, and 3.21 and 2.60 for rate of return, respectively, in the biomass values of green manures of 49.64; 41.55; 41.55 and 36.61 t ha-1, respectively. The use of hairy woodrose (Merremia aegyptia) and roostertree (Calotropis procera) biomass from the Caatinga biome proved to be a viable and promising technology for producers who practice carrot and sweet potato monocroping in a semi-arid environment.

BANKING MEMBERS:
Externa ao Programa - 2647268 - ELIZANGELA CABRAL DOS SANTOS
Presidente - 396319 - FRANCISCO BEZERRA NETO
Interna - 2578315 - JAILMA SUERDA SILVA DE LIMA
Externo ao Programa - 396313 - JOSE ESPINOLA SOBRINHO
Externo à Instituição - NATAN MEDEIROS GUERRA - EMATER
Externa ao Programa - 1714179 - VANIA CHRISTINA NASCIMENTO PORTO