首页|Soilless cultivation of ‘Ruby Star’ passion fruit: Effects of NO3-N application, pH, and temperature on fruit quality
Soilless cultivation of ‘Ruby Star’ passion fruit: Effects of NO3-N application, pH, and temperature on fruit quality
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NSTL
Elsevier
? 2022This study aimed to develop a nutrient solution management protocol to produce a high quality passion fruit using soilless culture. In this study, a two-year experiment was conducted using three levels of electrical conductivity (EC) (1.6, 2.0, and 2.6 dS m–1) of the nutrient solution in the first year, and three levels of pH (4, 5, 6) of the nutrient solution in the second year. Although no significant differences were detected in the above-ground dry matter weight, yield, and total soluble solids (TSS) of fruit juice of plants cultivated under different EC and pH conditions, dry matter weight tended to increase under pH 4 condition. The total NO3-N absorption increased in plants cultivated in EC 2.6, whereas absorption after pruning back the fruit-bearing vines was not significantly different as affected by EC 2.0 or EC 2.6. A nutrient solution with EC 2.0 and pH 4–5 containing 170 ppm NO3-N was found to be optimal for fruit quality. Higher air temperatures delayed fruit maturity and decreased TSS and titratable acidity of the juice, indicating that the optimal daily mean temperatures after flowering were 27–29°C for reliably producing high-quality fruit with a high sugar/acid ratio (≥6.0).
NSTL
Elsevier
