Banca de DEFESA: JENNIFER ALVES CAMILO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JENNIFER ALVES CAMILO
DATE: 13/03/2023
TIME: 09:00
LOCAL: Sala de Videoconferência do Campus Sete Lagoas (prédio principal)
TITLE:

AGRONOMIC PERFORMANCE OF WHEAT CULTIVARS UNDER DIFFERENT IRRIGATION LEVELS IN CERRADO MINEIRO

KEY WORDS:

Irrigated agriculture, Water déficit, Triticum aestivum L.

PAGES: 60
BIG AREA: Ciências Agrárias
AREA: Engenharia Agrícola
SUBÁREA: Engenharia de Água e Solo
SPECIALTY: Irrigação e Drenagem
SUMMARY:

In Brazil, wheat (Triticum aestivum L.) is one of the few commodities in which the country is not self-sufficient. A prominent alternative to reduce external dependence from other countries would be to encourage the expansion of culture to non-traditional regions, such as the Brazilian Cerrado. In this region, one of the main limitations to wheat cultivation is the occurrence of dry periods that can result in variability in crop productivity. Irrigation is one management option that can be adopted to solve this problem. However, due to water has become an increasingly limited resource, the biggest challenge for irrigated agriculture is to reach high production levels with high efficiency in water use. Therefore, the objective of the study is to evaluate the agronomic performance of wheat cultivars under different irrigation depths, in the Cerrado region of Minas Gerais. The experiment was conducted in randomized blocks, in a 2 x 5 factorial scheme: two cultivars (BRS 404 and ORS Feroz) in combination with 5 levels of crop evapotranspiration replacement (120%, 100%, 80%, 60%, and 40%), a total of 10 treatments with 4 replications each. Development (flowering, maturation, and plant height), wheat yield (shoot dry and fresh mass, number of spikes per unit area, number of grains per spike, weight of 1000 grains, and yield) and water productivity were evaluated. Data were submitted to analysis of variance, with qualitative variables submitted to Tukey's test (p<0.05) and quantitative variables submitted to regression analysis (p<0.05). The cultivar and irrigation depth interaction was significant only for the maturation variable. Cultivar BRS 404 showed greater plant height, shoot green mass and thousand-grain weight, and also a high susceptibility to lodging. ORS Feroz had the highest number of ears/m². Water and grain yields, as well as most of their components, differed significantly depending on the water regime. The 40% reduction in the water level received by the crop causes a 22.7% reduction in wheat yield, but provides a 57.7% increase in water productivity, which makes the adoption of reduced irrigation a viable strategy when the focus is on prioritizing water savings.

BANKING MEMBERS:
Presidente - 1508525 - JOAO CARLOS FERREIRA BORGES JUNIOR
Interna - 1583887 - NADIA NARDELY LACERDA DURAES PARRELLA
Externo à Instituição - PAULO EMÍLIO PEREIRA DE ALBUQUERQUE