Contents of macronutrients and growth of ‘BRS Marataoã’ cowpea fertigated with yellow water and cassava wastewater
Revista Ambiente E Água
Contents of macronutrients and growth of ‘BRS Marataoã’ cowpea fertigated with yellow water and cassava wastewater
Autor Correspondente: Narcísio Cabral de Araújo | [email protected]
Palavras-chave: agricultural use of wastes, human urine, vigna unguiculata (L.) Walp.
Resumos Cadastrados
Resumo Português:
O uso agrícola de águas amarelas associadas à manipueira é uma técnica sustentável, uma vez que possibilita a redução de custos com a aquisição de fertilizantes industrializados e minimiza a poluição ambiental ocasionada pela destinação final inadequada desses efluentes. Neste contexto, objetivou-se com este trabalho avaliar os teores de macronutrientes e o crescimento do feijão vigna fertirrigado com águas amarela associada à manipueira e NPK como fonte de nutrientes. O experimento foi instalado em uma casa de vegetação localizada no Campus I da Universidade Federal de Campina Grande. Utilizou-se delineamento inteiramente casualizado composto por cinco tratamentos caracterizados por fertirrigações com fertilizantes minerais, na forma de NPK; orgânicos compostos por urina humana, manipueira, urina humana mais manipueira e organomineral composto por urina, manipueira e fósforo mineral e quatro repetições. Aos 36 dias após a semeadura foram avaliados os teores de nitrogênio, fósforo, potássio, enxofre e as variáveis: número de folhas, altura de planta, diâmetro caulinar, área foliar, massa fresca e seca da parte aérea. O uso de águas amarelas promove incrementos significativos para os teores de nitrogênio e potássio principalmente, assim como para as variáveis de crescimento e produção. Os teores de nitrogênio, fósforo e potássio apresentam valores superiores aos considerados adequados para o cultivo do feijão vigna. O uso de urina humana e a manipueira apresentam potencialidade para suprir as necessidades dos principais macronutrientes requeridos pela cultura do feijão vigna e a irrigação via fertirrigação com estes biofertilizantes pode influenciar positivamente o desenvolvimento dessa cultura.
Palavras-chave: urina humana, uso agrícola de resíduos, Vigna unguiculata (L.) Walp.
Resumo Inglês:
Agricultural utilization of yellow waters associated with cassava wastewater is a sustainable technique, since it allows reduction of costs related to acquisition of industrialized fertilizers and minimizes the environmental pollution caused by the inadequate disposal of these effluents. In this context, this study evaluated the macronutrient macronutrient content and growth of cowpea fertigated with yellow water associated with cassava wastewater and NPK as source of nutrients. The experiment was set up in a greenhouse located at Campus I of the Federal University of Campina Grande. The experimental design was completely randomized, composed of five treatments characterized by: fertigation with mineral fertilizers, in the form of NPK; organic fertigation composed of human urine, cassava wastewater, human urine plus cassava wastewater; and organo-mineral fertigation composed of urine, cassava wastewater and mineral phosphorus, with four replicates. At 36 days after sowing, the following parameters were determined: contents of nitrogen, phosphorus, potassium, sulfur and the variables number of leaves, plant height, stem diameter, leaf area, shoot fresh matter and shoot dry matter. The use of yellow waters promotes significant increases for growth and production variables for nitrogen and potassium contents mainly, as well as for growth and production variables. The contents of nitrogen, phosphorus and potassium were higher than the levels considered as adequate for the cowpea crop. The use of human urine and cassava wastewater have potential to meet the needs for the main macronutrients required by cowpea and the irrigation via fertigation with these biofertilizers positively influences the development of cowpea.
Resumo Espanhol:
Agricultural utilization of yellow waters associated with cassava wastewater is a sustainable technique, since it allows reduction of costs related to acquisition of industrialized fertilizers and minimizes the environmental pollution caused by the inadequate disposal of these effluents. In this context, this study evaluated the macronutrient macronutrient content and growth of cowpea fertigated with yellow water associated with cassava wastewater and NPK as source of nutrients. The experiment was set up in a greenhouse located at Campus I of the Federal University of Campina Grande. The experimental design was completely randomized, composed of five treatments characterized by: fertigation with mineral fertilizers, in the form of NPK; organic fertigation composed of human urine, cassava wastewater, human urine plus cassava wastewater; and organo-mineral fertigation composed of urine, cassava wastewater and mineral phosphorus, with four replicates. At 36 days after sowing, the following parameters were determined: contents of nitrogen, phosphorus, potassium, sulfur and the variables number of leaves, plant height, stem diameter, leaf area, shoot fresh matter and shoot dry matter. The use of yellow waters promotes significant increases for growth and production variables for nitrogen and potassium contents mainly, as well as for growth and production variables. The contents of nitrogen, phosphorus and potassium were higher than the levels considered as adequate for the cowpea crop. The use of human urine and cassava wastewater have potential to meet the needs for the main macronutrients required by cowpea and the irrigation via fertigation with these biofertilizers positively influences the development of cowpea.
