Water use efficiency of coriander produced in a low-cost hydroponic system

Santos Júnior, José A.; Gheyi, Hans R.; Cavalcante, Antônio R.; Medeiros, Salomão de S.; Dias, Nildo da S.; Santos, Delfran B. dos

doi:10.1590/1807-1929/agriambi.v19n12p1152-1158

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Manejo de Solo, Água e Planta • Rev. bras. eng. agríc. ambient. 19 (12) • Dec 2015 • https://doi.org/10.1590/1807-1929/agriambi.v19n12p1152-1158 copy

Water use efficiency of coriander produced in a low-cost hydroponic system

Eficiência do uso da água na produção do coentro em hidroponia de baixo custo

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The increase of water use efficiency in crop production is a clear need in areas with restricted access to this resource and, in these cases, the adoption of forms of cultivation contextualized to local conditions are essential. Thus, the implications of the variation in the amount of seeds per cell (0.5, 1.0, 1.5 and 2.0 g) and spacing between cells (7.0, 10.0 and 15.0 cm) on variables related to consumption and water use efficiency for the production of coriander (cv. Tabocas) in a low-cost hydroponic system, an alternative for semiarid regions, were evaluated. A completely randomized experimental design, analysed in 4 x 3 factorial scheme with three replicates, was adopted, and the data were subjected to analysis of variance at 0.05 probability level. It was found that the reduction in the spacing between cells has a better cost-benefit ratio with respect to water consumption, biomass produced and cost of seeds. Therefore, it is recommended the adoption of a spacing of 7.0 cm between cells and the use of 1.0 g seeds per cell; this configuration promoted efficiency of 81.59 g L^-1 in shoot green mass production and total mass of 62.4 g coriander bunches.

Key words:
brazilian semiarid region; Coriandrum sativum L.; prototype validation

Parameters	Results
pH	7.06
EC_W (dS m^-1)	0.85
Ca (mg L^-1)	29.00
Mg (mg L^-1)	29.40
Na (mg L^-1)	274.62
K (mg L^-1)	7.02
Chloride (mg L^-1)	273.67
Sulfate (mg L^-1)	46.66
Bicarbonate (mg L^-1)	114.68
Carbonate (mg L^-1)	0.00
Iron (mg L^-1)	0.15
Dissolved oxygen (mg L^-1)	3.30
Alkalinity in carbonate - C0₃(mg L^-1)	0.00
Alkalinity in bicarbonate - HC0₃ (mg L^-1)	94.00
Total alkalinity - CaC0₃(mg L^-1)	94.00
Total hardness - CaC0₃ (mg L^-1)	195.00
Dry residue (mg L^-1)	545.28
Free ammonia - NH₃ (mg L^-1)	Absence
Nitrites - N0₂^- (mg L^-1)	Presence
Nitrates - N0₃^- (mg L^-1)	Absence

Compartimento	Estatística
Compartimento	RQMEn (%)	BIAS	dw	r	c
	Ano agrícola 2011/12
Parte aérea	34,7	-0,068	0,9987	0,9403	0,9390
Folhas	29,5	-0,106	0,9985	0,9381	0,9367
Colmos	35,3	-0,294	0,9968	0,9523	0,9492
Panículas	29,5	-0,267	0,9990	0,8537	0,8508
Biomassa senescida	63,6	-0,308	0,9961	0,8253	0,8222
	Ano agrícola 2012/13
MS de colmos e folhas	16,64	-0,13	0,9946	0,9591	0,9539
Panículas	22,77	-0,04	0,9899	0,9031	0,8939

Regiões orizicolas	Estatística
Regiões orizicolas	RQME (kg ha^-1)	BIAS	dw	r	c
Depressão Central	1778	0,0273	0,9817	0,3734	0,3666
Fronteira Oeste	1422	-0,005	0,9874	0,7300	0,7208
PCI à Lagoa dos Patos	1165	0,0443	0,9910	0,6538	0,6479
PCE à Lagoa dos Patos	1022	-0,051	0,9336	0,6791	0,6340
Zona Sul	2134	-0,158	0,8411	0,5066	0,4252
Todas Regiões	1541	0,021	0,9960	0,5513	0,5491

Source of variation	DF	Mean square
Source of variation	DF	WCP	wcs	WCR	ISBP	R/S¹ 1 Values transformed by the equation (X + 0.5)0.5
Amount of seeds (A)	3	3.502^ ,*** Significant at 0.05 and 0.01 probability levels, respectively; *	3.404^ ,*** Significant at 0.05 and 0.01 probability levels, respectively;	3.600^ns ns Not significant F test; DF – Degrees of freedom; CV – Coefficient of variation;	0.0009^ns ns Not significant F test; DF – Degrees of freedom; CV – Coefficient of variation;	0.0007^ns ns Not significant F test; DF – Degrees of freedom; CV – Coefficient of variation;
Linear regression	1	4.179^ ,*** Significant at 0.05 and 0.01 probability levels, respectively;	5.088^ ,*** Significant at 0.05 and 0.01 probability levels, respectively;	3.596^ns ns Not significant F test; DF – Degrees of freedom; CV – Coefficient of variation;	0.0022^ ,*** Significant at 0.05 and 0.01 probability levels, respectively;	0.0016^ ,*** Significant at 0.05 and 0.01 probability levels, respectively;
Quadratic regression	1	0.524	0.021^ns ns Not significant F test; DF – Degrees of freedom; CV – Coefficient of variation;	4.197^ns ns Not significant F test; DF – Degrees of freedom; CV – Coefficient of variation;	0.00008^ns ns Not significant F test; DF – Degrees of freedom; CV – Coefficient of variation;	0.00006^ns ns Not significant F test; DF – Degrees of freedom; CV – Coefficient of variation;
Spacing (S)	2	9.514^ ,*** Significant at 0.05 and 0.01 probability levels, respectively;	15.157^ ,*** Significant at 0.05 and 0.01 probability levels, respectively;	1.222^ns ns Not significant F test; DF – Degrees of freedom; CV – Coefficient of variation;	0.00003^ns ns Not significant F test; DF – Degrees of freedom; CV – Coefficient of variation;	0.00002^ns ns Not significant F test; DF – Degrees of freedom; CV – Coefficient of variation;
Interaction A x S	6	2.732^ ,*** Significant at 0.05 and 0.01 probability levels, respectively;	3.554^ ,*** Significant at 0.05 and 0.01 probability levels, respectively;	2.791^ns ns Not significant F test; DF – Degrees of freedom; CV – Coefficient of variation;	0.0006	0.0005^ns ns Not significant F test; DF – Degrees of freedom; CV – Coefficient of variation;
Residue	24	0.725	0.730	1.103	0.0003	0.0002
CV	(%)	0.94	0.95	1.14	2.24	1.93

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[1] jose.amilton@pq.cnpq.br(Corresponding author)