Banca de QUALIFICAÇÃO: JÉSSICA MOTA PIMENTA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : JÉSSICA MOTA PIMENTA
DATE: 29/06/2022
TIME: 10:00
LOCAL: Ambiente virtual
TITLE:

Soil water availability and its relationship with sugarcane yield in rainfed and irrigated cultivation in Rio Largo, AL.

KEY WORDS:

Transpiration, dual Kc, Thornthwaite, Crop Modelling

PAGES: 52
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Agrometeorologia
SUMMARY:

Knowing the variations in soil water availability and the amount of water required by the crop is important for agricultural planning and yield estimates. Some models have been used to determine variations in soil water availability, such as: Thornthwaite & Mather and Kc dual (FAO56), but these models do not directly relate the water available for the crop to its final yield. Thus, it is necessary to combine these models with indices that relate productivity to water availability. This project aims to evaluate the impact of water availability on the productivity of sugarcane under rainfed and irrigated conditions in the coastal plateau region of Alagoas. Agrometeorological, crop and soil data were obtained in experiments carried out in the experimental area of the Agricultural Sciences Center of the Federal University of Alagoas, AL. Thornthewaite & Mather and Kcdual (FAO56) soil water balance models were used to determine water availability. The optimization of crop coefficients (Kc), basal crop coefficient (Kcb) and permanent wilting point will be performed by the estimate tool of the OpenModel software. The model optimization will be made from the statistical analysis between the estimated and observed data of evapotranspiration and volumetric soil moisture. The accuracy and precision of the estimates will be evaluated by the agreement index of Willmott and Mastura (2006) and coefficient of determination (r2). Based on the Water Satisfaction Index (WSI) and Yield Reduction (YR) indices, the relationship between productivity and water availability will be evaluated. It is expected to obtain the BAS model that best represents the variation of soil water storage in sugarcane crop in the region and the optimized indices to estimate the real yield of the crop in rainfed and irrigated regimes.

BANKING MEMBERS:
Interno - 1574025 - GUSTAVO BASTOS LYRA
Externa à Instituição - MARIANA DE OLIVEIRA PEREIRA
Externo à Instituição - Guilherme Bastos Lyra