PRODUCTION AND QUALITY OF MINI WATERMELON UNDER DRIP IRRIGATION WITH BRACKISH WATER

Ó, LAÍS MONIQUE GOMES DO; COVA, ALIDE MITSUE WATANABE; GHEYI, HANS RAJ; SILVA, NEILON DUARTE DA; AZEVEDO NETO, ANDRÉ DIAS DE

doi:10.1590/1983-21252020v33n320rc

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Agricultural Engineering • Rev. Caatinga 33 (3) • Jul-Sep 2020 • https://doi.org/10.1590/1983-21252020v33n320rc copy

PRODUCTION AND QUALITY OF MINI WATERMELON UNDER DRIP IRRIGATION WITH BRACKISH WATER

PRODUÇÃO E QUALIDADE DE MINIMELANCIA SOB IRRIGAÇÃO POR PULSOS COM ÁGUA SALOBRA

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Watermelon plays an important role in Brazilian agribusiness. The objective of present study was to evaluate the effect of different irrigation managements and water salinity levels, on the main productive and postharvest characteristics of mini-watermelon (Citrullus lanatus) cv. ‘Sugar Baby’. The experiment was conducted in a greenhouse in a completely randomized design, arranged in a 2 x 4 factorial scheme, with four replicates. The treatments consisted of two types of irrigation management (conventional and pulse) and four saline levels of nutrient solution of fertigation (2.5; 4.5; 5.5; 6.5 dS m^-1). The control treatment corresponded to the electrical conductivity of the nutrient solution prepared with local supply water. The irrigation depth was calculated by the product of reference evapotranspiration and crop coefficient. The number of pulses were defined and fractionated according to the atmospheric demand. The salinity of the fertigation solution affects some variables of the production, but does not reduce the quality of the mini-fruit cv. ‘Sugar Baby’. The management of pulse irrigation shows better results in low salinity, while conventional drip management is more suitable for high salinity (6.5 dS m^-1).

Keywords:
Citrullus lanatus ; Irrigation management; Salinity; Maturity index

	Test F
SV	DF	FM	PM	RM	PY	PD	TC	LC	FSI	TSS	pH	TTA	MI
Management	1	ns	ns	ns	ns	ns	ns	ns	ns	ns	ns	^ significant at p ≤ 0.01.	^ significant at p ≤ 0.01.
Salinity	3	^* * significant at p ≤ 0.05;	ns	^ significant at p ≤ 0.01.	ns	ns	ns	^ significant at p ≤ 0.01.	ns	ns	^ significant at p ≤ 0.01.	^* * significant at p ≤ 0.05;	^ significant at p ≤ 0.01.
Linear	1	^ significant at p ≤ 0.01.	ns	^ significant at p ≤ 0.01.	ns	^ significant at p ≤ 0.01.	^ significant at p ≤ 0.01.	^ significant at p ≤ 0.01.	ns	ns	ns	ns	^ significant at p ≤ 0.01.
Quadratic	1	ns	ns	^ significant at p ≤ 0.01.	ns	ns	ns	ns	ns	ns	ns	^ significant at p ≤ 0.01.	ns
Interaction	3	ns	ns	ns	ns	^ significant at p ≤ 0.01.	^ significant at p ≤ 0.01.	ns	ns	ns	ns	ns	ns
Residue	24
Mean		1.32	0.81	0.51	60.63	0.13	0.55	0.57	1.01	11.00	5.37	0.24	48.17
CV%		16.8	19.2	20.3	9.8	6.4	5.5	5.4	6.3	8,14	3.0	18.0	21.7

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