Production of parsley in hydroponic conditions under isosmotic brackish nutrient solutions

Martins, Juliana Bezerra; Santos Júnior, José Amilton; Silva Júnior, Fernando José da; Silva, Gerônimo Ferreira da; Medeiros, Salomão de Sousa

doi:10.1590/1413-7054201943023418

Acessibilidade / Reportar erro

Brasil

Español English

sumário « anterior atual seguinte »

Sumário

Agricultural Sciences • Ciênc. agrotec. 43 • 2019 • https://doi.org/10.1590/1413-7054201943023418 copy

Production of parsley in hydroponic conditions under isosmotic brackish nutrient solutions

Produção da salsa em condições hidropônicas sob soluções nutritivas salobras isosmóticas

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Brackish waters may vary in their chemical compositions, interfering with different plant responses to stress; therefore, the present study aimed to evaluate the production components of parsley plants subjected to levels of electrical conductivity in nutrient solutions with an initial ECns of 1.58 dS m^-1, which was solubilized in water with the following water electrical conductivity configurations (ECw): 0.12 (control), 1.12, 2.12, 3.12, 4.12 and 5.12 dS m^-1, resulting in six isosmotic levels (EC_ns = 1.7, 2.7, 3.7, 4.7, 5.7 and 6.7 dS m^-1) in an interaction with four types of salt: NaCl, CaCl₂, MgCl₂ and KCl. The experimental design was completely randomized in a factorial scheme with five replicates. Two strategies were used to restore the volume consumed by the parsley plants, and the replacement was made with municipal-supply water (ECa = 0.12 dS m^-1) in the first strategy and with the respective brackish waters in the second strategy. The total fresh and dry weights of the shoots and roots were evaluated as well as the total dry mass percentage of the shoots and roots. The responses of the plants to the different cationic natures was more evident at the highest levels of electrical conductivity tested, and the use of municipal-supply water to replace the evapotranspired depth mitigated the deleterious effects of salinity. In addition, greater reductions were observed in the fresh and dry mass when the replacement of the volume consumed was with the brackish waters.

Index terms:
Petroselinum crispum; salinity; cationic nature; hydroponics.

Editora da Universidade Federal de Lavras Editora da UFLA, Caixa Postal 3037 - 37200-900 - Lavras - MG - Brasil, Telefone: 35 3829-1115 - Lavras - MG - Brazil
E-mail: revista.ca.editora@ufla.br

Acompanhe os números deste periódico no seu leitor de RSS

[1] *Corresponding author: julianaabmartins@gmail.com

EC of the nutrient solution (dS m^-1)
	1.7	2.7	3.7	4.7	5.7	6.7
¹TFM (g) - Municipal-supply (EC_ns: p<0.05, CN: p<0.05; EC_nsvsCN: p<0.05, CV = 4.63%)
NaCl	69.56a	58.37a	48.69a	38.72a	35.41a	29.84a	y=-7.9271^**x + 80.059, R² = 0.9662
CaCl₂	65.18a	52.43b	44.51bc	34.97bc	25.08b	20.41b	y=-9.0126^**x + 78.283, R² = 0.9875
MgCl₂	62.51a	46.92c	42.83c	34.55c	26.15b	21.93b	y=-7.814^**x + 71.967, R² = 0.9659
KCl	69.20a	54.41b	46.71ab	38.05ab	35.00a	29.89a	y=-7.5269^**x + 77.156, R² = 0.9425
¹SFM (g) - Municipal-supply (EC_ns: p<0.05, CN: p<0.05, EC_nsvsCN: p<0.05, CV = 4.95%)
NaCl	49.58a	42.92a	36.62a	28.83a	26.67a	23.01a	y =-5.4111^**x + 57.332, R² = 0.9701
CaCl₂	47.01a	38.86b	33.08b	27.25a	18.56b	16.33b	y = -6.2894^**x + 56.597, R² = 0.9855
MgCl₂	45.73a	33.94c	32.87b	27.05a	20.61b	18.15b	y = -5.2489^**x + 51.77, R² = 0.949
KCl	49.95a	40.61ab	35.21a	28.45a	26.98a	22.78a	y = -5.2429^**x + 56.017, R² = 0.9515
RFM (g) - Municipal-supply (EC_ns: p<0.05, CN: p<0.05, EC_ns vsCN: p>0.05, CV = 10.88%)
		NaCl	CaCl₂	MgCl₂	KCl		y = 0.9543^**x + 86.048, R² = 0.9727
		11.99a	10.25c	9.42d	11.04b		y = 0.9543^**x + 86.048, R² = 0.9727

EC of the nutrient solution (dS m^-1)
	1.7	2.7	3.7	4.7	5.7	6.7
TFM (g) - Brackish (EC_ns: p<0.05, CN: p<0.05, EC_ns vsCN: p>0.05, CV = 4.46%)							y=-5.0017^**x + 58.511, R² = 0.9932
		NaCl	CaCl₂	MgCl₂	KCl
		38.34a	36.87b	37.44ab	37.35ab
SFM (g) - Brackish (EC_ns: p<0.05, CN: p<0.05, EC_ns vsCN: p>0.05, CV = 5.54%)							y = -4.2546^**x + 48.918, R² = 0.9937
		NaCl	CaCl₂	MgCl₂	KCl
		31.88a	30.47b	31.26ab	30.58b
¹RFM (g) - Brackish (EC_ns: p<0.05, CN: p<0.05, EC_nsvsCN: p<0.05, CV = 4.71%)
NaCl	8.24a	7.37a	6.75a	6.06a	5.33ab	5.00a	y = -0.6574^**x + 9.2195, R² = 0.9888
CaCl₂	8.46a	7.42a	6.39a	5.63a	5.35a	5.17a	y = -0.6691^**x + 9.2137, R² = 0.9227
MgCl₂	8.34a	7.35a	6.47a	5.83a	4.75b	4.29b	y = -0.8197^**x + 9.6145, R² = 0.9917
KCl	9.03a	8.17a	6.86a	6.17a	5.50a	4.86ab	y = -0.8443^**x + 10.311, R² = 0.9825

EC of the nutrient solution (dS m^-1)
	1.7	2.7	3.7	4.7	5.7	6.7
¹TDM (g) - Municipal-supply (EC_ns: p<0.05, CN: p<0.05, EC_nsvsCN: p<0.05, CV = 5.66%)
NaCl	11.78a	9.00a	7.92a	7.34a	6.64a	5.16a	y=-1.1646**x + 12.865, R² = 0.9256
CaCl₂	10.22a	8.71a	7.63a	6.90ab	4.42b	3.64b	y= -1.3286**x + 12.5, R² = 0.9773
MgCl₂	10.43a	8.87a	7.83a	5.50b	4.56b	3.96b	y= -1.3603**x + 12.572, R² = 0.9731
KCl	10.69a	8.94a	7.81a	7.07a	6.50a	5.08a	y=-1.0317**x + 12.015, R² = 0.9707
¹SDM (g) - Municipal-supply (EC_ns: p<0.05, CN: p<0.05, EC_nsvsCN: p<0.05, CV = 5.69%)
NaCl	8.36a	7.53a	6.83a	6.45a	5.85a	4.47a	y =-0.7106**x + 9.5661, R² = 0.9672
CaCl₂	8.14a	7.12a	6.73a	6.25a	4.00b	3.35b	y = -0.9654**x + 9.9865, R² = 0.9361
MgCl₂	8.24a	7.66a	6.86a	4.74b	4.00b	3.53b	y = -1.0471**x + 10.236, R² = 0.9573
KCl	8.56a	7.34a	6.82a	6.34a	5.73a	4.42a	y = -0.7431**x + 9.6562, R² = 0.9675
¹RDM (g) - Municipal-supply (EC_ns: p<0.05, CN: p<0.05, EC_nsvsCN: p<0.05, CV = 5.98%)
NaCl	2.60a	1.77a	1.08a	0.88a	0.79a	0.69a	y = -0.3626**x + 2.8245, R² = 0.8311
CaCl₂	2.07a	1.59ab	0.90a	0.65a	0.41a	0.29b	y = -0.3626**x + 2.5078, R² = 0.9290
MgCl₂	2.18a	1.20b	0.96a	0.76a	0.56a	0.43b	y = -0.3106**x + 2.3194, R² = 0.8403
KCl	2.13a	1.59ab	0.99a	0.82a	0.77a	0.66a	y = -0.2851**x + 2.3576, R² = 0.8508
%TDM (%) - Municipal-supply (EC_ns: p<0.05, CN: p>0.05, EC_ns vsCN: p>0.05, CV = 14.63%)							y = 0.5209**x + 13.547, R² = 0.816
%SDM (%) - Municipal-supply (EC_ns: p<0.05, CN: p<0.05, EC_ns vsCN: p>0.05, CV = 8.06%)							y = 0.9557**x + 13.941, R² = 0.9724
		NaCl	CaCl₂	MgCl₂	KCl
		17.97ab	18.64a	16.35b	18.87a
¹%RDM (%) - Municipal-supply (EC_ns: p<0.05, CN: p<0.05, EC_nsvsCN: p<0.05, CV = 9.74%)
NaCl	13.88a	9.91a	9.03a	9.06a	9.20a	10.15ab	y = 0.5121**x² - 4.8949x + 20.235, R² = 0.9217
CaCl₂	11.43a	11.06a	8.07a	8.54a	7.30b	8.47b	y = 0.2625**x² - 2.9367x + 16.083, R² = 0.8369
MgCl₂	13.17a	9.62a	9.51a	10.29a	10.71a	12.02a	y = 0.4718**x² - 4.0116x + 18.037, R² = 0.8041
KCl	12.42a	11.63a	8.74a	8.64a	9.66a	10.94a	y = 0.4641**x² - 4.2816x + 18.781, R² = 0.8652

EC of the nutrient solution (dS m^-1)
TDM (g) - Brackish (EC_ns: p<0.05, CN: p<0.05, EC_ns vsCN: p>0.05, CV = 7.82%)				y=-0.8089**x + 10.699, R² = 0.9969
NaCl	CaCl₂	MgCl₂	KCl
7.54a	7.27ab	7.31ab	7.10b
SDM (g) - Brackish (EC_ns: p<0.05, NC: p<0.05, EC_ns vsCN: p>0.05, CV = 8.66%)				y = -0.74**x + 9.648, R² = 0.9972
NaCl	CaCl₂	MgCl₂	KCl
6.78a	6.49ab	6.54ab	6.35b
RDM (g) - Brackish (EC_ns: p<0.05, CN: p>0.05, EC_ns vsCN: p>0.05, CV = 6.64%)				y = -0.0689**x + 1.0475, R² = 0.9891
%TDM (%) - Brackish (EC_ns: p<0.05, CN: p>0.05, EC_ns vsCN: p>0.05, CV = 9.43%)				y = 0.4586**x + 17.766, R² = 0.8931
%SDM (%) - Brackish (EC_ns: p<0.05, CN: p>0.05, EC_ns vsCN: p>0.05, CV = 10.87%)				y = 0.5326**x + 19.11, R² = 0.8825
%RDM (%) - Brackish (EC_ns: p<0.05, CN: p<0.05, EC_ns vsCN: p>0.05, CV = 9.53%)				y = 0.332**x + 10.569, R² = 0.9765
NaCl	CaCl₂	MgCl₂	KCl
11.76bc	12.32ab	12.61a	11.15c