Banca de DEFESA: MILLENA DE ARAUJO RODRIGUES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MILLENA DE ARAUJO RODRIGUES
DATE: 09/09/2021
TIME: 09:00
LOCAL: Online
TITLE:

PEANUTS IRRIGATED WITH DIFFERENT WATER BLADES UNDER DOSES OF PHOSPHATE AND ORGANIC FERTILIZATION

KEY WORDS:

Water consumption, Irrigation, Phosphor, Chicken bed.

PAGES: 65
BIG AREA: Ciências Agrárias
AREA: Engenharia Agrícola
SUBÁREA: Engenharia de Água e Solo
SPECIALTY: Irrigação e Drenagem
SUMMARY:

Peanuts are the fourth most cultivated oilseed in the world, but in order to obtain high yields in the Semiarid region, irrigation is necessary. The production of this crop is related to soil fertility, and phosphorus is considered the main factor of crop productivity. It is also widely used as a fertilizer for chicken litter, as it presents the main nutrients (nitrogen, phosphorus and potassium). Thus, the objective was to evaluate the response of peanut crops under different irrigation depths and different doses of phosphate and organic fertilization. The experiment was conducted in the experimental area of the IRRIGA Group, at the Federal University of Alagoas, Campus de Arapiraca, with a randomized block design in a 5 x 5 x 4 factorial. The treatments applied consisted of 5 irrigation depths: 50, 75, 100, 125 and 150% of daily crop evapotranspiration (ETc), 5 doses of phosphate fertilization: 0, 50, 100, 150 and 200% of the crop recommendation, and in the other experiment, five levels of fertilization (2, 4, 6, 8 and 10 t/ha), with 4 repetitions. Each experimental plot was composed of 27 plants, distributed in 1.0 m², evaluated only the 10 central plants. The ETc was determined using the SLIMCAP system, used to apply water depths. The variables studied were: plant height (AP), number of pods (NVV) and number of stalks (NHP) per plant, average length (CMV) and average diameter (DMV) of the pod, volume of pod per plot (VVP) , green weight (PVV) and dry weight (PSV) of the pod, and relative chlorophyll index (SPAD). The results concluded were that for phosphate fertilization the variables SPAD, NVP, VVP and PVV respond to the interaction of irrigation depth and doses of phosphate fertilization. AP, NH and PS respond to lamina and phosphate fertilization alone. On the other hand, CM responds significantly only to phosphate fertilization and DM is not influenced by the factors studied. The maximum production points of most variables were obtained with the irrigation depth higher than ETc and fertilization (P2O5) lower than recommended for the crop. The results for the experiment with chicken litter showed that the irrigation depths positively influenced the variables: AP, NHP, NVP, DMV, VVP, PVV, PSV, in which they obtained better performance at 100% ETc; the variables CMV and chlorophyll index (SPAD) had a decreasing influence with the increase of irrigation depths, the greater the irrigation depth, the lower the value obtained; the doses of organic fertilizer had no positive influence, only on the chlorophyll index (SPAD), obtaining higher values in the doses closer to 100% of the recommendation.

BANKING MEMBERS:
Presidente - 1544058 - MARCIO AURELIO LINS DOS SANTOS
Interno - 1543863 - CICERO GOMES DOS SANTOS
Externo à Instituição - GERÔNIMO FERREIRA DA SILVA - UFRPE
Externo à Instituição - MARCELO CAVALCANTE - IFAL