Banca de DEFESA: RICHARD GEREMIAS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : RICHARD GEREMIAS
DATE: 01/11/2023
TIME: 13:00
LOCAL: https://conferenciaweb.rnp.br/sala/jose-guilherme-marinho-guerra
TITLE:

Agronomic performance of intercropped winter cover crops in climatic conditions of Itobi, SP.

KEY WORDS:

Agroecology; soil management; green manure.

PAGES: 32
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitotecnia
SPECIALTY: Manejo e Tratos Culturais
SUMMARY:

Organic production systems integrate principles that valorize sustainable agricultural management. The adopted techniques aim to combine food production while conserving and, as much as possible, improving the biological, physical, and chemical characteristics of the soil, which constitute the concept of fertility in the broad sense. In this context, the use of cover crop species for green manure, in sole crop or intercropped cultivation systems, is an important strategy for atmospheric carbon fixation, utilizing the plant's photosynthetic apparatus that results in the "in situ" production of biomass, which, after management, contributes organic matter to the soil. The objective of this study was to determine the growth and agronomic performance of winter cover crop species cultivated in intercropping systems, as well as to define an optimal proportion of white lupine (Lupinus albus) among the evaluated intercropping combinations. The experimental work was conducted in the municipality of Itobi, in the central region of the state of São Paulo. The adopted statistical design was a randomized complete block design with six treatments formed by the arrangements of winter cover crop species, plus a control treatment represented by spontaneous vegetation (SV). The evaluated winter cover crop species were: black oats (BO); forage radish (FR); buckwheat (BW); and white lupine (WL). The planting arrangements consisted of proportions (%) of mixtures obtained from the quantities used at the time of sowing, as follows: 40BO+20FR+40BW; 30BO+15FR+30BW+25WL; 20BO+10FR+20BW+50WL; 10BO+5FR+10BW+75WL; 100WL; SV. The evaluations included quantification of aboveground biomass production at 30, 51, and 80 days after sowing (DAS). Among the species evaluated in the intercropping systems, forage radish showed the highest potential for aboveground biomass production at different evaluation times, reaching an average productivity of 10.05 Mg ha^-1 at 80 DAS. The intercropping combinations most favorable to WL growth consisted of initial proportions of 50% and 75% of this legume in the mixture, which provided aboveground biomass productivities of 1.38 and 2.47 Mg ha-1, respectively. It can be inferred from the results that intercropped winter species involving different botanical families, aimed at green manure, enable the attainment of productions that simultaneously incorporate unique characteristics of each species, thereby enhancing biodiversity in green manure management.

COMMITTEE MEMBERS:
Presidente - ***.371.857-** - JOSÉ GUILHERME MARINHO GUERRA - EMBRAPA
Interna - 2145575 - ANELISE DIAS
Externo à Instituição - ARISON JOSÉ PEREIRA