Banca de DEFESA: HELANE CRISTINA AGUIAR SANTOS
Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.STUDENT : HELANE CRISTINA AGUIAR SANTOS
DATE: 24/02/2023
TIME: 08:30
LOCAL: Sala Virtual - google.meet
TITLE:
Productive performance of black pepper cultivars under irrigation management conditions in the northeast of Pará
KEY WORDS:
Piper nigrum L., physiology, water status, tensiometry.
PAGES: 175
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUMMARY:
Black pepper is the most important spice traded in the world and is widely used as a condiment. Brazil is among the largest producers in the world, with the states of Pará and Espírito Santo being the main responsible for the cultivation and production. In view of the economic and social importance of black pepper for the Northeast of Pará and the scarcity of studies in the Amazon, it is necessary to know its behavior in these edaphoclimatic conditions, the potentiating and limiting effect of water in the soil on its agronomic variables, defining the amount of water needed, as well as water monitoring, understanding its relationship in the soil-plant-atmosphere system. The experiment is being conducted in the area of Empresa de Produtos Tropicais de Castanhal LTDA (TROPOC) located in the municipality of Castanhal - PA. The experimental design is in randomized blocks (DBC) in a factorial scheme in subdivided plots, 5 x 2, using 10 treatments and three replications. Where, each plot consisted of 16 plants, in a double row, with a spacing of 2.2 x 2.2 m between plants. The treatments consist of five soil water tensions (15, 25, 35, 45 and 55 kPa) as an indication of the time to irrigate – critical tension, and two black pepper cultivars (cloned and uthirankotta). The characteristics evaluated were characterized by cultivars such as leaf area, anatomy, gas exchange and water status. To verify the effect of treatments, gaseous exchanges and water relationship was performed. In addition, production, productivity and efficiency in water use was also evaluated. For the characterization of cultivars there was a significant difference for anatomy variavies and gas exchanges with cloned cultivar showing better efficiency than uthirankotta. While for the variables corresponding to growth and water status, uthirankotta was more efficient than cloned. There was interaction between the factors of water voltage in the soil and cultivars for the AN/E and water potential relationship before. For the variables stomatic conductance, internal carbon concentration, Ci/Ca ratio there was interaction between soil water tensions and evaluation period. Transpiration was significant for soil water tensions, cultivars and evaluation period. In productive variables there was interaction between soil water tensions and evaluation period and cultivars and evaluation period. With the exception of black pepper production and productivity that was significant for soil water tensions, cultivars and evaluation period. The cultivar uthirankotta was the one that presented, in these two years of production cycle, the largest production of green and dry pepper (6.55 and 3.05 kg plant-1, respectively).
BANKING MEMBERS:
Presidente - 2747716 - JOAQUIM ALVES DE LIMA JUNIOR
Externo ao Programa - 3158799 - JANNAYLTON EVERTON OLIVEIRA SANTOS
Externo à Instituição - EDUARDO CEZAR MEDEIROS SALDANHA - YARA
Externo à Instituição - LUCAS CAVALCANTE DA COSTA - NENHUMA
Externo à Instituição - ORIEL FILGUEIRA DE LEMOS - EMBRAPA