FERTIGATION OF SUNFLOWER CROPS USING LANDFILL LEACHATE

Coelho, Daniela da Costa Leite; Medeiros Júnior, Antonio Osmar; Silva, Ketson Bruno da; Dias, Nildo da Silva; Batista, Rafael Oliveira

doi:10.1590/1983-21252018v31n417rc

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ENGENHARIA AGRÍCOLA • Rev. Caatinga 31 (04) • Oct-Dec 2018 • https://doi.org/10.1590/1983-21252018v31n417rc copy

FERTIGATION OF SUNFLOWER CROPS USING LANDFILL LEACHATE¹ 1 Paper extracted from first author's doctoral dissertation.

PRODUÇÃO DE GIRASSOL FERTIRRIGADO COM PERCOLADO DE ATERRO SANITÁRIO

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The use of landfill leachate (LL) to produce biomass for energy and biofuel purposes is an alternative that minimizes environmental degradation. In this context, the objective of this work was to evaluate the effect of using different rates of LL in the fertigation of sunflower (Helianthus annuus L.) crops. The experiment was conducted in a randomized block design with five treatments and four replications-20 experimental plots. The treatments consisted of control with 100% water from the water supply (WWS) (T₁); 80% WWS + 20% LL (T₂); 60% WWS + 40% LL (T₃); 40% WWS + 60% LL (T₄); and 20% WWS + 80% LL (T₅). The sunflower crops were grown in a eutrophic Red-Yellow Argisol for 81 days, in Mossoró RN, Brazil. The plant characteristics evaluated-plant height, number of leaves, steam diameter and capitulum diameter-was determined. All variables evaluated presented statistical differences between treatments. In general, plants in the treatment 60% WWS + 40% LL presented better performance regarding the characteristics evaluated.

Keywords:
Helianthus annuus L.; Urban wastewater; Biomass; Biofuel

	Soil density	Sand	Silt	Clay	Gravimetric moisture
Layer (m)	g cm^-3	g kg-1			%
0.00-0.20	1.81	660	230	100	12.10
0.20-0.40	1.63	620	130	250	8.66

		Layer (m)				Layer (m)
Characteristics		0.00-0.20	0.20-0.40	Characteristics		0.00-0.20	0.20-0.40
pH		7.47	6.99
EC_1:2,5	dS m^-1	0.2	0.09	Fe		25.93	30.02
OM	dag kg^-1	0.69	0.55
N	g kg^-1	0.36	0.4	Mn		107.4	75.5
P		12.18	5.97
K⁺	mg dm^-3	145.7	194.31	Cu		0.17	0.18
Na⁺		78.52	71.5
Ca²⁺		2.54	2.32	Zn		1.94	0.65
Mg²⁺		1.53	1.74		mg dm^-3
Al³⁺		0.00	0.00	Ni		0.05	0.06
H + Al	cmol_c dm^-3	0.35	0.37
SB		4.77	4.86	Pb		0.17	0.15
CEC		5.12	5.24
T		4.77	4.86	Cd		0.01	0.00
V		93.47	92.84
M	%	0.00	0.00
PES		7.13	6.52

		Mean Square (MS)
Source of Variation (SV)	Degree of freedom (DF)	PH	NL	SD	CD
		(m)	(unidades)	(cm)	(cm)
Treatments	4	0.1381^**	21.6213^**	0.2114^**	5.0072^**
Time	4	2.0652^**	702.5876^**	2.3050^**	458.1548^**
Treatments x Time	16	0.0185^*	5.3939^n.s.	0.0235^n.s.	2.2809^**
Block	3	0.0394^**	7.7784^n.s.	0.1045^**	3.1728^*
Error	72	0.0083	39.377	0.0178	0.9963
Coefficient of variation (CV) (%)	-	17.92	12.61	18.77	27.89

Characteristics	Regression equations
PH	$\hat{H} =0.624390- 0.03873 0^{**} Rates R^{2} =0.54$
SD	$S \hat{D} =0.836685- 0.04169 5^{**} Rates R^{2} =0.4 1$
CD	$C \hat{D} =4.177840- 0.19981 0^{**} Rates R^{2} =0.40$

Universidade Federal Rural do Semi-Árido Avenida Francisco Mota, número 572, Bairro Presidente Costa e Silva, Cep: 5962-5900, Telefone: 55 (84) 3317-8297 - Mossoró - RN - Brazil
E-mail: caatinga@ufersa.edu.br

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[1] * Corresponding author.

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FERTIGATION OF SUNFLOWER CROPS USING LANDFILL LEACHATE1 1 Paper extracted from first author's doctoral dissertation.

PRODUÇÃO DE GIRASSOL FERTIRRIGADO COM PERCOLADO DE ATERRO SANITÁRIO

ABSTRACT

FERTIGATION OF SUNFLOWER CROPS USING LANDFILL LEACHATE¹ 1 Paper extracted from first author's doctoral dissertation.