GROWTH AND SEED YIELD OF SUNFLOWER ON SOIL FERTILIZED WITH CASSAVA WASTEWATER

Mara Suyane Marques Dantas,Mario Monteiro Rolim,Manassés Mesquita Da Silva,Daniel Da Costa Dantas,Elvira Maria Regis Pedrosa

doi:10.1590/1983-21252017v30n417rc

Mara Suyane Marques Dantas, Mario Monteiro Rolim + Show 3 more

Open Access

https://doi.org/10.1590/1983-21252017v30n417rc

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Journal: Revista Caatinga	Publication Date: Dec 1, 2017
Citations: 3	License type: cc-by

Affiliation: Universidade Federal Rural de Pernambuco

Abstract

ABSTRACT Cassava wastewater is the liquid residue of the cassava flour processing and its application to the soil as fertilizer for agricultural crops is a good alternative to sources of nutrients for plants. In this context, the objective of this work was to evaluate the growth and seed yield of sunflower on soil fertilized with cassava wastewater. A randomized block experimental design with four replications was used, with six cassava wastewater rates (0, 8.5, 17, 34, 68 and 136 m3 ha-1) and six plant sampling times (15, 30, 45, 60, 75 and 90 days after sowing), using the sunflower cultivar Helio-250. The evaluated variables were total leaf area, leaf area index, leaf area ratio, specific leaf area, leaf weight ratio, shoot dry mass and sunflower seed yield. The use of cassava wastewater rate of 136 m3 ha-1 increases the seed yield, leaf area, leaf area index and shoot dry mass, and results in lower leaf area ratio, specific leaf area and leaf weight ratio of sunflower (cv. Helio-250) crops.

Highlights

Advances in agricultural production systems in recent decades have increased the consumption of inputs and generation of waste by agricultural and agro-industrial activities, aggravating global environmental problems such as the destruction of the ozone layer, greenhouse effect and loss of biodiversity; and local problems caused by the impacts of the generation of liquid and solid waste
The processing for cassava flour production generates solid and liquid residues, from which the cassava wastewater is the most harmful to the environment, due to its high content of organic compounds and of linamarin, which is a cyanogenic glycoside of high toxicity (CAMPOS et al, 2006)
The objective of this work was to evaluate the growth and seed yield of sunflower on soil fertilized with cassava wastewater

Summary

Introduction

Advances in agricultural production systems in recent decades have increased the consumption of inputs and generation of waste by agricultural and agro-industrial activities, aggravating global environmental problems such as the destruction of the ozone layer, greenhouse effect and loss of biodiversity; and local problems caused by the impacts of the generation of liquid and solid waste.The processing for cassava flour production generates solid and liquid residues, from which the cassava wastewater is the most harmful to the environment, due to its high content of organic compounds and of linamarin, which is a cyanogenic glycoside of high toxicity (CAMPOS et al, 2006). The use of cassava wastewater in agriculture can be a viable alternative to source nutrients for plants and reduce environmental impacts, contributing to a low-carbon emission agriculture (DANTAS et al, 2015). Sunflower (Helianthus annuus L.) stands out as one of the four main annual oil producing crops of the world. This oleaginous plant presents important characteristics, such as resistance to drought, cold and heat, adapts to different soil and climate conditions, and can be grown all year round. Its planted area in Brazil has been gradually expanding, generating new income and work opportunities to family agriculture because the use of cassava wastewater as soil fertilizer for this crop

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