Effect of colored shading nets and fertigation nutrient solutions on gerbera cultivation<sup>1</sup>

Nascimento, Jéssica Garcia; Rodrigues, Paulo Hercílio Viegas; Pacheco, Adriano Bicioni; Moura, Larissa Brêtas; Duarte, Sergio Nascimento

doi:10.1590/1983-40632025v5582248

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Research Article • Pesqui. Agropecu. Trop. 55 • 2025 • https://doi.org/10.1590/1983-40632025v5582248 linkcopy

Effect of colored shading nets and fertigation nutrient solutions on gerbera cultivation¹

Malhas de sombreamento coloridas e soluções nutritivas de fertirrigação no cultivo de gérbera

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The production of gerbera (Gerbera jamesonii) under greenhouse conditions often involves shading techniques to control micrometeorological conditions and fertigation to optimize plant nutrition. This study aimed to evaluate the chlorophyll index, leaf area and yield characteristics of potted gerbera (‘Red with Eye’ cultivar). A randomized complete block design was adopted, in a 4 × 3 factorial arrangement, with four concentrations of the fertigation nutrient solution (50, 75, 100 and 125 %) and three shading net colors (red, blue and black). The chlorophyll indices, leaf area and dry masses of the flower capitula, stem and leaves were evaluated. The highest chlorophyll indices were observed under red and black nets at the highest nutrient concentration. The leaf area followed a quadratic response to the nutrient concentration, with a maximum value of 82.9 %. For the dry masses, there was a significant interaction between the factors. Under the blue net, the greatest dry masses were obtained at nutrient concentrations of 93-98 %, whereas, under the red net, the highest values occurred at the 50 % concentration and was recommended as the most efficient treatment.

KEYWORDS:
Gerbera jamesonii; photoselective netting; plant nutrition; chlorophyll indexes

Solution (%)	EC (dS m^-1)	pH
50	1.44	6.74
75	2.26	6.55
100	2.69	6.41
125	3.30	6.30

Source of variation	DF	^{_____________} 38 DAT ^{_____________}			^{________________} 59 DAT ^{________________}			^{_______________} 99 DAT ^{_______________}
Source of variation	DF	a	b	total	a	b	total	a	b	total
Anova
Nutritive solutions (NS)	3	14.26**	23.60*	73.53*	12.07**	22.02*	59.90**	1.51ns	4.27ns	10.75ns
Colored nets (C)	2	0.83ns	4.82ns	4.66ns	21.76***	35.31**	112.47***	21.67**	34.08**	108.08**
NS x C	6	1.58ns	12.57ns	21.01ns	2.22ns	6.72ns	13.97ns	2.46ns	5.18ns	14.54ns
Block	9	3.29ns	4.97ns	14.71ns	4.47*	11.48ns	26.84ns	1.98ns	3.67ns	8.96ns
Nutritive solutions (NS)
50		39.94 b	16.08 b	56.09 b	41.58 b	18.82 b	60.41 b	37.50 a	19.69 a	57.19 a
75		41.16 ab	17.33 ab	58.49 ab	43.24 ab	20.77 ab	64.01 ab	37.23 a	18.82 a	56.05 a
100		40.63 ab	17.46 ab	58.09 ab	43.63 a	19.90 ab	63.53 ab	37.89 a	19.62 a	57.51 a
125		42.52 a	19.52 a	62.04 a	43.75 a	22.02 a	65.77 a	37.08 a	18.48 a	55.57 a
Colored nets (C)
Red		42.47 a	17.32 a	58.19 a	41.94 b	19.01 b	60.95 b	36.09 b	17.56 b	53.64 b
Blue		41.31 a	17.28 a	58.94 a	42.94 ab	20.17 ab	63.12 ab	38.02 a	19.48 a	57.51 a
Black		41.01 a	18.25 a	59.26 a	44.27 a	21.96 a	66.22 a	38.17 a	20.42 a	58.59 a

Source of variation	DF	Leaf area (cm²)	^{________________________________________} Dry mass (g) ^{________________________________________}
Source of variation	DF	Leaf area (cm²)	Floral capitula	Stems	Leaves	Total
Nutritive solutions (NS)	3	186,056*	0.381ns	0.0478ns	0.187ns	1.225ns
Colored nets (C)	2	3,399ns	9.298***	1.330***	12.643***	59.777***
NS x C	6	28,514ns	6.065ns	0.391*	5.672**	28.354**
Block	9	89,821ns	1.748ns	0.110ns	1.861ns	8.340ns

Colored nets	^{__________________} Nutritive solutions (%) ^{__________________}
Colored nets	50	75	100	125
Floral capitula dry weight (g)
Red	5.2425 aA	4.4175 abA	2.7075 bA	3.7975 abA
Blue	1.055 bB	2.7525 abA	4.4275 aA	2.7475 abA
Black	3.8475 aA	4.2600 aA	3.8225 aA	4.4275 aA
Stem dry weight (g)
Red	1.538 aA	1.518 aA	1.023 aA	1.203 aAB
Blue	0.475 bB	1.178 aA	1.143 abA	0.828 abB
Black	1.695 aA	1.250 aA	1.368 aA	1.528 aA
Leaf dry weight (g)
Red	5.573 aA	5.123 abA	3.003 bA	4.170 abA
Blue	1.423 bB	2.975 abB	4.480 aA	2.838 abA
Black	4.658 aA	4.288 aAB	4.400 aA	4.535 aA
Total dry weight (g)
Red	12.353 aA	11.058 abA	6.733 bA	9.170 abA
Blue	2.953 bB	6.905 abA	10.050 aA	6.413 abA
Black	10.200 aA	9.798 aA	9.590 aA	10.490 aA

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[1] Means followed by the same letter, in the columns, do not differ among themselves by the Tukey test at 5 % of probability.

[TFN1] ^ns
not significant;

[TFN2] ^*
significant at p ≤ 0.05;

[TFN3] ^**
significant at p ≤ 0.01;

[TFN4] ^***
significant at p ≤ 0.001, by the Tukey test.

Effect of colored shading nets and fertigation nutrient solutions on gerbera cultivation1

Malhas de sombreamento coloridas e soluções nutritivas de fertirrigação no cultivo de gérbera

ABSTRACT

Effect of colored shading nets and fertigation nutrient solutions on gerbera cultivation¹