Title:	Leaching runoff fraction for nitrate and herbicides on sugarcane fields: implications for grey water footprint.
Authors:	SCARPARE, F. V. ZOTELLI, L. do C. BARIZON, R. R. M. CASTRO, S. G. Q. de BEZERRA, A. H. F.
Affiliation:	FABIO VALE SCARPARE, WASHINGTON STATE UNIVERSITY; LUCIANA DO CARMO ZOTELLI, UNIVERSIDADE ESTADUAL DE CAMPINAS; ROBSON ROLLAND MONTICELLI BARIZON, CNPMA; SERGIO GUSTAVO QUASSI DE CASTRO, CENTRO NACIONAL DE PESQUISA EM ENERGIA E MATERIAIS; ANDRE HERMAN FREIRE BEZERRA, UNIVERSIDADE FEDERAL DO RIO GRANDE DO NORTE.
Date Issued:	2023
Citation:	Sustainability, v. 15, n. 8, article 6990, 2023.
Description:	Abstract: Sugarcane cultivation uses many chemical inputs to ensure good yields, which puts local water resources under pressure. Grey water footprint (GWF) is a widely used indicator of the volume needed to assimilate a pollutant load in a water body. However, the GWF relies on leaching runoff fractions, which are empirically determined. We hypothesize that these fractions might not represent the true magnitude of the Brazilian sugarcane environment and that management practices can further reduce this fraction loaded into the environment. In two field trials, we measure the herbicides and nitrate loaded into the environment through in situ measurements, determine their loss fractions, compare them with some empirical models, calculate the GWF, and estimate the potential for nitrate pollution attenuation with the adoption of split and incorporated nitrogen application. Both hypotheses are confirmed. For nitrate, our results suggest that the leaching runoff fraction used in most GWF studies is overestimated by about two times, impacting the GWF estimation for the Brazilian sugarcane environment. However, the same conclusion was not possible for herbicides due to the low diversity of the analyzed molecules. In addition, the fertilizer management application reduced the nitrate load on the environment, which the GWF did not necessarily detect.
Thesagro:	Cana de Açúcar Herbicida Nitrato Impacto Ambiental Recurso Hídrico Poluição da Água
NAL Thesaurus:	Herbicides Diuron Hexazinone Nitrates Environmental impact Water quality Water quality standards Water pollution
Keywords:	Grey water footprint
ISSN:	2071-1050
DOI:	https://doi.org/10.3390/su15086990
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPMA)