Banca de DEFESA: TEREZA THAINÁ MONTEIRO DO CARMO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : TEREZA THAINÁ MONTEIRO DO CARMO
DATE: 29/11/2023
TIME: 09:00
LOCAL: google meet
TITLE:

AGRICULTURE WITHOUT BURNING: THE USE OF MEDIUM-SIZED SHREDDER IN FAMILY FARMING AREA PREPARATION

KEY WORDS:

Secondary vegetation; Family farming; Capoeira biomass; Northeast region of Pará.

PAGES: 50
BIG AREA: Ciências Agrárias
AREA: Recursos Florestais e Engenharia Florestal
SUMMARY:

The crisis linked to climate change and global warming, persisting for years and particularly at present, demands the implementation of measures that address societal concerns. Among these measures, there is a highlighted need to reassess the management of natural resources. In this context, the practice of Agriculture without Burning emerges as a crucial alternative to avoid the use of fire in family farming, where this practice still persists. The use of fire to improve soil properties in nutritional terms and prepare the area for cultivation is a harmful practice, both for farmers and the environment. The Tipitamba project engages in technical-scientific cooperation to conduct studies that make family farming area preparation in the Northeast region of Pará less environmentally aggressive, with a focus on sustainable management of the capoeira, using shredders. Thus, the aim of this work was to assess the performance of a medium-sized shredder in the crushing of capoeira biomass, evaluating the biomass crushing yield, material quality, and cultivation performance. Experiments were conducted in Igarapé-Açu, in the northeastern part of Pará, a municipality known for agricultural production and support for small producers and family farming. For capoeira shredding, the medium-sized Ecotritus HL240 tractor from Himev was used. The evaluation of crushing yield was obtained by collecting aerial biomass on family farmers' properties, varying in size and conditions. Material crushing quality was assessed through a screening system using three sieves: 7mm, 25mm, and 35mm. To evaluate agricultural cultivation performance, a crop of corn, cowpea, and cassava was analyzed, simulating the production of these crops in an area prepared with the medium-sized shredder. The crops were planted in an area of approximately 0.5 hectares, divided into 3 blocks with 9 plots measuring approximately 16x33m, with spacings of 1x0.5m for corn and cowpea, and 1x1m for cassava. Three treatments were applied: T1 - corn, T2 – corn + cassava, T3 – corn + cowpea + cassava. As a result, an average biomass aerial yield of approximately 19.79 tons per hectare and consumption of 79.89 liters per hectare were obtained. The results for material quality indicated that the total amount of dry shredded biomass was approximately 17.08 tons per hectare. When using sieves, larger quantities of material were found in the <7mm class, followed by material >35mm. Larger-sized materials are important as long-term nutrient sources, while smaller-sized materials (<7mm) are absorbed more quickly. Average results were obtained for corn: T1 - 2.02 tons/ha, T2 - 1.87 tons/ha, T3 - 2.14 tons/ha; for cowpea: 1.59 tons/ha; for cassava, T2 presented 10,065.28 tons/ha and T3: 8,081.389 tons/ha. With the presented results, we can conclude the efficient functioning of the Ecotritus HL240 shredder, good efficiency in crushing, and possibilities to serve family farmers with capoeiras up to 5 years old.

BANKING MEMBERS:
Externo à Instituição - DIEGO MARTINS STANGERLIN - UFMT
Externa à Instituição - DÉBORA VEIGA DE ARAGÃO - EMBRAPA
Presidente - 094.373.632-34 - OSVALDO RYOHEI KATO - UFRA
Externo à Instituição - PAULO CELSO SANTIAGO BITTENCOURT - UFPA
Externa ao Programa - 1741033 - THAIS YURI RODRIGUES NAGAISHI