Efeito de adubos orgânicos provenientes de dejetos de bovinos confinados nos atributos físicos e químicos do solo e na produtividade do milho
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Data
2005-12-16
Autores
Pelá, Adilson [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
O presente trabalho teve como objetivo avaliar o efeito da utilização de adubos orgânicos, produzidos por diferentes processos de reciclagem de dejetos bovinos criados em sistema de confinamento para novilhos superprecoces, nos atributos químicos e físicos de um LATOSSOLO VERMELHO Distrófico e na produtividade da cultura do milho. O experimento foi conduzido por duas safras agrícolas, 2002/2003 e 2003/2004. Utilizou-se o delineamento experimental em blocos casualizados com quatro repetições e seis tratamentos: T1 = efluente de biodigestor; T2 = esterco de esterqueira; T3 = composto orgânico; T4 = vermicomposto; T5 = adubo mineral; T6 = testemunha (sem utilização de adubos). As parcelas possuíam 15 m de comprimento por 8 m de largura, com área total de 120 m2. As quantidades para cada fonte orgânica foram calculadas com base nos seus teores de nitrogênio, para aplicação de 120 kg ha-1 de N. No tratamento T5 utilizou-se uma formulação N-P2O5-K2O, com base na análise do solo para P e K, e também 120 kg ha-1 de N, dos quais 30 kg foram aplicados na base e o restante em cobertura, em uma única aplicação, aos 33 e 37 dias após a emergência das plantas, na primeira e segunda safra, respectivamente. Os adubos orgânicos foram incorporados ao solo por meio de uma gradagem, antes da semeadura. O milho, cv. híbrido DKB 350 foi semeado dia 6 de janeiro de 2003 na primeira safra, e no dia 26 de dezembro de 2003 na segunda safra, com espaçamento de 90 cm entre linhas, e população de 55000 plantas por hectare. Os atributos do solo foram avaliados nas camadas de 0-0,10 e 0,10-0,20 e 0,20-0,30 m. Os atributos físicos avaliados foram o diâmetro médio ponderado, a argila dispersa em água, a resistência à penetração, a condutividade hidráulica saturada, a densidade do solo, porosidade total, macro e microporosidade...
The present work had as its aim to evaluate the effect of cattle manure usage, produced by different processes of bovine dejections recycling raised in pen system for superprecocious steers in the chemical and physical properties of a distrophyc Red Oxisol and in the maize productivity. The experiment was carried out by two crop harvests 2002/2003 and 2003/2004. A completely randomized block design was used with four replications and six treatments: T1 = biodigestor effluent; T2 = cattle manure; T3 = organic composition; T4 = vermicompost; T5 = mineral fertilizer; T6 = witness (without fertilizer application). The parcels were 15 meters long and 8 meters wide, with a total area of 120 square meters. The amounts for each organic source had been calculated based on their nitrogen concentration, for a N application of 120 kg ha-1. In T5 treatment, a N-P2-O5-K2O formula was used, based on the soil analysis for P and K, and also 120 kg ha-1 of N, of which 30 kg were applied in the base and the rest in the covering, in a single application, at 33 and 37 days after the plant emerging, in the first and second harvests, respectively. The organic matter had been incorporated to the soil by grading, before sowing. The maize, cv. Hybrid DKB 350 was sown in January 6th, 2003 in the first harvest and in December 26th, 2003 in the second harvest, with a distance of 90 cm between the lines and a population of 55,000 plants per linear meter. The soil attributes were evaluated in the 0-0,10 and 0,10-0,20 and 0,20-0,30 layers. The evaluated physical attributes were the mean weighed diameter, the water dispersed clay, the penetration resistance, the saturated hydraulic conductivity, the soil bulk density, total porosity, macro and microporosity. Concerning the chemical attributes, the fractioned organic matter, macro and micronutrients, pH... (Complete abstract, click eletronic address below)
The present work had as its aim to evaluate the effect of cattle manure usage, produced by different processes of bovine dejections recycling raised in pen system for superprecocious steers in the chemical and physical properties of a distrophyc Red Oxisol and in the maize productivity. The experiment was carried out by two crop harvests 2002/2003 and 2003/2004. A completely randomized block design was used with four replications and six treatments: T1 = biodigestor effluent; T2 = cattle manure; T3 = organic composition; T4 = vermicompost; T5 = mineral fertilizer; T6 = witness (without fertilizer application). The parcels were 15 meters long and 8 meters wide, with a total area of 120 square meters. The amounts for each organic source had been calculated based on their nitrogen concentration, for a N application of 120 kg ha-1. In T5 treatment, a N-P2-O5-K2O formula was used, based on the soil analysis for P and K, and also 120 kg ha-1 of N, of which 30 kg were applied in the base and the rest in the covering, in a single application, at 33 and 37 days after the plant emerging, in the first and second harvests, respectively. The organic matter had been incorporated to the soil by grading, before sowing. The maize, cv. Hybrid DKB 350 was sown in January 6th, 2003 in the first harvest and in December 26th, 2003 in the second harvest, with a distance of 90 cm between the lines and a population of 55,000 plants per linear meter. The soil attributes were evaluated in the 0-0,10 and 0,10-0,20 and 0,20-0,30 layers. The evaluated physical attributes were the mean weighed diameter, the water dispersed clay, the penetration resistance, the saturated hydraulic conductivity, the soil bulk density, total porosity, macro and microporosity. Concerning the chemical attributes, the fractioned organic matter, macro and micronutrients, pH... (Complete abstract, click eletronic address below)
Descrição
Palavras-chave
Solos - Densidade, Porosidade, Ácido húmico, Ácido fúlvico, Condutividade eletrica, Soil density, Porosity, Resistence to penetration, Aggregates, Hydraulic conductivity, Electric conductivity, Humic acid, Fulvic acid, Humin
Como citar
PELÁ, Adilson. Efeito de adubos orgânicos provenientes de dejetos de bovinos confinados nos atributos físicos e químicos do solo e na produtividade do milho. 2005. ix, 133 f. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Ciências Agronômicas, 2005.