Organic compost and wastewater on the initial growth of oilseed plants

Júlia S Pereira,Maria S S De Farias,Vera L A De Lima,Riuzuani M B P Lopes,Jean P Guimarães,Carlos A V De Azevedo

doi:10.1590/1807-1929/agriambi.v20n6p501-506

Abstract

ABSTRACT The study was conducted in two experiments in greenhouse of the CTRN/UFCG, aiming to evaluate the use of organic compost from household garbage and irrigation with treated domestic wastewater on the growth of castor bean 'BRS-188/Paraguaçu' and sunflower 'Embrapa 122-V2000'. Both experiments were conducted a randomized block design in 6 x 2 factorial scheme, with three replicates, which corresponded to six doses of organic compost (0, 1.2, 2.0, 2.8, 3.6 and 4.4 kg pot-1, equivalent to 0, 60, 100, 140, 180 and 220 kg N ha-1) and two types of water (freshwater and wastewater). It was found that the organic compost doses significantly influenced the growth of sunflower and castor bean in all evaluations, except for stem diameter. The maximum plant heights were 91.7 cm for castor bean and 85.2 cm for sunflower at the doses of 180 and 220 kg N ha-1, respectively. The highest values of number of leaves were obtained for the N dose of 220 kg ha-1 in both crops. The influence of wastewater on growth variables was only observed in the final evaluations, for both sunflower and castor bean.

Highlights

The accelerated population growth increases the search for natural resources and, as a consequence, causes the increment in waste generation
Urban solid wastes are inadequately disposed in the environment, either through clandestine garbage deposits or in public landfills that do not have any technical study on environmental impacts
This study aimed to evaluate the cultivation of castor bean and sunflower irrigated with treated domestic wastewater associated with fertilization using urban solid waste compost and, according to the results, contribute to the development of a sustainable agriculture

Summary

Introduction

The accelerated population growth increases the search for natural resources and, as a consequence, causes the increment in waste generation. Urban solid wastes are inadequately disposed in the environment, either through clandestine garbage deposits or in public landfills that do not have any technical study on environmental impacts. It is evident the need for promoting an adequate management of the areas of solid waste disposal in order to avoid or reduce the possible negative effects on the environment and public health. Agriculture has been considered as one of the activities that cause environmental impacts This activity has peculiarities that allow the recycling of products considered as of no importance, which include the recycling of urban garbage, generating an organic compost that can be used with great agronomic potential, for showing high concentration of nutrients in its composition. Studies have shown that the use of organic compost in the soil has improved its physical, chemical and biological properties, becoming an important alternative for being obtained and low-cost (Lopes, 2013)

Objectives

Methods

Results