Germinação e morfofisiologia de plântulas de maracujazeiro sob irrigação com água salina

Andrade, Jailma Ribeiro de; Medeiros, Aldair de Sousa; Maia Júnior, Sebastião de Oliveira; Rezende, Leila de Paula; Araújo Neto, João Correia de

doi:10.1590/1983-40632018v4852710

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Scientific Articles • Pesqui. Agropecu. Trop. 48 (3) • Jul-Sep 2018 • https://doi.org/10.1590/1983-40632018v4852710 copiar

Germinação e morfofisiologia de plântulas de maracujazeiro sob irrigação com água salina

Autoria SCIMAGO INSTITUTIONS RANKINGS

RESUMO

O uso de água salina na irrigação provoca redução no crescimento e produtividade de culturas agrícolas. Objetivou-se avaliar a germinação, emergência, fisiologia e crescimento de mudas de duas variedades de maracujazeiro, sob irrigação com água salina. A pesquisa foi conduzida em duas etapas: a primeira em laboratório e a segunda em casa-de-vegetação, sob delineamento em blocos ao acaso, em esquema fatorial 2 x 4, correspondendo a duas variedades de maracujazeiro (BRS RC e BRS GA1) e quatro níveis de condutividade elétrica da água de irrigação (0,2 dS m^-1; 2,2 dS m^-1; 4,2 dS m^-1; e 6,2 dS m^-1), com quatro repetições. A variedade BRS GA1, apesar de ser mais sensível ao nível de salinidade do que a BRS RC, na fase de germinação, apresenta maior índice e porcentagem de germinação. Durante o crescimento das mudas, a variedade BRS GA1 não sofre danos no aparelho fotossintético, como evidenciado pela maior biomassa das folhas que na BRS RC.

PALAVRAS-CHAVE:
Passiflora edulis; crescimento vegetativo; salinidade

Sources of variation	F-test
Sources of variation	GSI	G%	DWs	DWr
Salinity (S)	14.41^* ns and * not significant and significant, respectively, according to the F-test at 5 %.	5.02^* ns and * not significant and significant, respectively, according to the F-test at 5 %.	3.56^* ns and * not significant and significant, respectively, according to the F-test at 5 %.	1.64^ns ns and * not significant and significant, respectively, according to the F-test at 5 %.
Linear regression	25.68^* ns and * not significant and significant, respectively, according to the F-test at 5 %.	1.36^ns ns and * not significant and significant, respectively, according to the F-test at 5 %.	0.03^ns ns and * not significant and significant, respectively, according to the F-test at 5 %.	0.27^ns ns and * not significant and significant, respectively, according to the F-test at 5 %.
Quadratic regression	11.80^* ns and * not significant and significant, respectively, according to the F-test at 5 %.	10.27^* ns and * not significant and significant, respectively, according to the F-test at 5 %.	5.29^* ns and * not significant and significant, respectively, according to the F-test at 5 %.	2.31^ns ns and * not significant and significant, respectively, according to the F-test at 5 %.
Variety (V)	36.69^* ns and * not significant and significant, respectively, according to the F-test at 5 %.	15.32^* ns and * not significant and significant, respectively, according to the F-test at 5 %.	0.04^ns ns and * not significant and significant, respectively, according to the F-test at 5 %.	10.77^* ns and * not significant and significant, respectively, according to the F-test at 5 %.
S x V	3.73^* ns and * not significant and significant, respectively, according to the F-test at 5 %.	3.76^* ns and * not significant and significant, respectively, according to the F-test at 5 %.	5.61^* ns and * not significant and significant, respectively, according to the F-test at 5 %.	1.95^ns ns and * not significant and significant, respectively, according to the F-test at 5 %.
CV(%)	13.30	6.50	18.70	21.30

Sources of variation	F-test
Sources of variation	PH	SD	NL	SPAD	Fv/Fm	LA	LDW	SDW	RDW
Salinity (S)	19.05^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	13.66^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	12.60^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	5.31^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	8.49^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	1.56^ns ns, * not significant and significant, respectively, according to the F-test at 5 %.	1.06^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	7.85^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	5.92^* ns, * not significant and significant, respectively, according to the F-test at 5 %.
Linear regression	56.03^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	37.85^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	36.02^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	243.40^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	25.32^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	1.77^ns ns, * not significant and significant, respectively, according to the F-test at 5 %.	45.19^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	22.12^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	12.07^* ns, * not significant and significant, respectively, according to the F-test at 5 %.
Quadratic regression	1.07^ns ns, * not significant and significant, respectively, according to the F-test at 5 %.	0.09^ns ns, * not significant and significant, respectively, according to the F-test at 5 %.	1.71^ns ns, * not significant and significant, respectively, according to the F-test at 5 %.	6.20^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	0.09^ns ns, * not significant and significant, respectively, according to the F-test at 5 %.	1.99^ns ns, * not significant and significant, respectively, according to the F-test at 5 %.	5.70^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	1.40^ns ns, * not significant and significant, respectively, according to the F-test at 5 %.	0.00^ns ns, * not significant and significant, respectively, according to the F-test at 5 %.
Variety (V)	9.48^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	25.10^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	8.67^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	11.82^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	17.27^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	81.82^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	33.39^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	0.16^ns ns, * not significant and significant, respectively, according to the F-test at 5 %.	0.20^ns ns, * not significant and significant, respectively, according to the F-test at 5 %.
S x V	0.47^ns ns, * not significant and significant, respectively, according to the F-test at 5 %.	1.26^ns ns, * not significant and significant, respectively, according to the F-test at 5 %.	0.17^ns ns, * not significant and significant, respectively, according to the F-test at 5 %.	1.18^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	4.01^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	1.78^ns ns, * not significant and significant, respectively, according to the F-test at 5 %.	0.76^* ns, * not significant and significant, respectively, according to the F-test at 5 %.	0.64^ns ns, * not significant and significant, respectively, according to the F-test at 5 %.	0.96^ns ns, * not significant and significant, respectively, according to the F-test at 5 %.
Block	3.34	0.01	0.30	43.13	0.00	89.00	0.13	0.01	0.01
Residue	0.63	0.04	0.29	2.72	0.00	68.20	0.18	0.04	0.01
CV(%)	7.10	6.00	6.60	10.60	2.20	7.70	15.00	17.90	9.60

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[TFN1] ^{ns and *}
not significant and significant, respectively, according to the F-test at 5 %.