Data/hora: 04/06/2024 17:12:53

Biblioteca(s): 	Embrapa Florestas.	
Data corrente: 	10/12/2021	
Data da última atualização: 	10/12/2021	
Autoria: 	KÖLLN, O. T. K.; GAVA, G. J. de C.; CANTARELLA, H.; SILVA, S. R.; TRIVELIN, P. C. O.	
Afiliação: 	ORIEL TIAGO KÖLLN, Universidade Estadual do Norte do Paraná; GLAUBER JOSÉ DE CASTRO GAVA, IAC; HEITOR CANTARELLA, IAC; SERGIO RICARDO SILVA, CNPF; PAULO CESAR OCHEUZE TRIVELIN, USP.	
Título: 	Sugarcane yield loss due to water and nitrogen deficiencies evaluated by carbon isotopic discrimination method.	
Ano de publicação: 	2021	
Fonte/Imprenta: 	Emirates Journal of Food and Agriculture, v. 33, n. 9, p. 751-763, 2021.	
DOI: 	10.9755/ejfa.2021.v33.i9.2756	
Idioma: 	Inglês	
Conteúdo: 	Water and nitrogen (N) availability are determining factors for crop development and production. Assessments of sugarcane yield loss based on these factors may become more accurate by using the stable carbon (C) isotope technique. The aim of this work was to evaluate the effect of N and water on sugarcane yield, isolating the yield losses (YL) caused by N or by water limitations, and correlating them with the fractionation of C isotopes (&#916;13C). The research was carried out in field conditions in the municipality of Jaú, Brazil. A statistical design in randomized block was used, considering the 2 × 2 × 2 factorial arrangement, composed of two cycles [first (2008/09) and second (2009/10)], two N rates (without and with N) and two water supplies (rainfed and irrigated). These variables were evaluated: biometric features (plant height, stalk diameter and tillering), yield elements [stalk yield (STY), sucrose yield (SUY), and stalk dry matter (SDM)], technological quality parameters [fiber content, sucrose juice content (SJC), and total sucrose recovery (TSR)], stalk N concentration (SNC) and accumulation (SNA), and &#916;13C. The effect of irrigation associated with N fertilization on STY, SUY, and SDM, resulted in average increases of 53.7, 9.0, and 18.6 Mg ha-1, respectively. The average YL for STY in two crop seasons were 40.5%, 35.2%, and 48.2% due to limitations of N or water or N+water, respectively. The SNC was not affected by the water supply, but it was increased by N fertilization. The highest value of &#916;13C was obtained for the treatment without N fertilization in rainfed conditions, and the least &#916;13C was found for the one with N Fertilization and irrigation. The &#916;13C measurement was effective in identifying N and water deficiencies, presenting potential to be used as an indicator of N and water limitations for sugarcane yield.	
Palavras-Chave: 	Deficit hídrico; Loss index of stalk biomass; Water-N interaction.	
Thesagro: 	Cana de Açúcar.	
Thesaurus Nal: 	Saccharum; Soil water deficit; Water supply.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Florestas (CNPF)	
Exemplares: 	CNPF - (57926-1) - UPC - AP - DD -  -  -  - DIS