Nutrient contents and growth of corn fertigated with human urine and cassava wastewater

Abstract

This study aimed to evaluate the contents of macronutrients (NPK and S) and the growth of ‘Potiguar’ corn fertigated with human urine, cassava wastewater and their associations with NPK. The experiment was set up in greenhouse located on Campus I of Universidade Federal de Campina Grande. A completely randomized experimental design was used, consisting of eight treatments, corresponding to fertigation with mineral fertilizer NPK formula; organic, composed of yellow water, cassava wastewater and human urine associated with cassava wastewater; organomineral, composed of human urine associated with phosphorus and potassium, cassava wastewater associated with nitrogen and phosphorus and human urine associated with cassava wastewater and phosphorus, with five repetitions. At 50 days after sowing (DAS), plants were evaluated for the leaf NPK and S concentrations and growth variables: number of leaves, plant height, stem diameter, leaf area, fresh and dry mass of leaves, mass of stem and shoots. Nitrogen and phosphorus concentrations and the growth variables number of leaves, plant height, fresh and dry mass of leaves, mass of stem and of shoot were influenced by fertigation with human urine, cassava wastewater concentrations and their associations with NPK. In the leaves of corn cultivar Potiguar the accumulated concentrations of N, P and K, at 50 DAS, varied in the sequence N > K > P. Human urine has potential as source of N in fertigation of corn and cassava wastewater can be used if associated with other sources of nutrients.

Fuzzy modeling of the effects of the use of mineral and organic fertilizers on the productivity of second crop corn

“…High productivity is related to several factors, such as applications of technologies, integrated pest and disease management, soil fertility, among others (Araújo et al, 2019). Like any plant, corn requires essential nutrients for its growth, development and production, with the emphasis on macronutrients nitrogen (N), phosphorus (P) and potassium (K) (EMBRAPA, 2009).…”

Features and Applications of Urine Stabilization Methods: A Review

“…The essential way to solve this problem is to continuously increase the productivity under the premise of sustainable consumption of natural resources, ensure the integrity and optimization of all links in the food supply chain, and increase the purchasing power of the disadvantaged groups. Recycling urea from urine wastewater is undoubtedly a sustainable way to turn waste into treasure, effectively reducing the dependence on the Haber-Bosch method for fertilizer production, saving costs, and reducing environmental impact, especially in developing countries (Akpan-Idiok et al, 2012;Andersson, 2015;Araújo et al, 2019). Compared with mineral fertilizers, urine fertilizers reduce the need for energy and the impact on the environment (Medeiros et al, 2020).…”

“…However, only 2.9 billion people (39%) worldwide had access to safely managed sanitation services by 2015 (WHO, 2018). The "World Water Development Report 2019" released by the United Nations emphasized the need to implement the "2030 Agenda for Sustainable Development" and recognize the human rights of safe drinking water and sanitation, both of which are essential for eradicating poverty and building a prosperous society (Andersson, 2015;Araújo et al, 2019; United Nations World Water Assessment Programme (WWAP), 2019).…”