Banca de QUALIFICAÇÃO: MARRY SUELLY FERREIRA DE JESUS

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : MARRY SUELLY FERREIRA DE JESUS
DATA : 06/07/2023
HORA: 08:30
LOCAL: Embrapa Agrossilvipastoril
TÍTULO:

SELECTION OF COWPEA BEAN LINES IN RESPECT TO THE APPLICATION OF FERTILIZERS

PALAVRAS-CHAVES:

Plant breeding; Vigna unguiculata L.; Agronomic performance

PÁGINAS: 28
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
SUBÁREA: Fitotecnia
ESPECIALIDADE: Melhoramento Vegetal
RESUMO:

In cowpea culture, in some situations, the application of fertilizers can cause the plants to vegetate excessively, culminating in low productivity and plant lodging. In this case, the application of fertilizers can increase the cost without the expected increase in production. Considering the need for rational use of fertilizers and that there is variability regarding the efficiency and response in the use of fertilizers, the selection of more efficient cowpea lines to be used as parents in the breeding program will contribute to the development of new cultivars . This work was carried out with the objective of selecting cowpea lines that were efficient and responsive to the application of the formulated fertilizer NPK 00-20-20 in the sowing furrow. The genotypes were evaluated in Sorriso-MT in the years 2019 and 2020 and in Sinop-MT in 2020. Two experiments were installed in each location/year, one with fertilizer application and the other without application, totaling six experiments. In all locations, before sowing, composite samples of the soil layer from 0 to 0.20 m were collected and sent for analysis in the laboratory, aiming at physical and chemical characterization, for interpretation of the edaphic conditions of the experimental area. The trials were composed of twenty treatments, with 14 promising lines and six commercial cultivars. The experimental design used was complete randomized blocks (DBC), with three replications, plots of 2 rows of 4 meters in length and spacing of 0.5m between rows. Data were subjected to analysis of variance and means grouped by Scott & Knott's (1974) test. Genotypes were classified according to efficiency and response to fertilizer application according to methodology adapted from Fageria & Kluthcouski (1980). The G6 lineage (MNC11-1021E-17) showed the highest grain yield averages observed with and without fertilizer application. The average response to fertilization of the G6 line was 306 kg ha-1 (5.1 bags), being classified as efficient and responsive. The G6 lineage also showed a low lodging index and a 100-grain mass above 20 grams, being superior to the BRS Pajeú cultivar.

MEMBROS DA BANCA:
Presidente - 055.314.176-75 - JOSE ANGELO NOGUEIRA DE MENEZES JUNIOR - UFV
Interno - 607.835.671-20 - EULÁLIA SOLER SOBREIRA HOOGERHEIDE - USP
Externo à Instituição - ISABELA VOLPI FURTINI - EMBRAPA