Foliar content and visual symptoms of nutritional deficiency in pineapple ‘Vitória’

Yield gap reduction of pineapple (Ananas comosus L.) by site-specific nutrient management

“…Pineapple fruit quality: In Table 7 , degree Brix and vitamin C concentrations in the treatment without fertilizers and in the one without K were lower than those in the other treatments. The findings from the study conducted by Cunha et al [ 51 ] align with this result, indicating that applying 24 g of potassium per plant provoked a significant increment in both the degree of Brix and vitamin C content, reaching levels of 22.5 and 210.3 % respectively, compared to the control group. Chen et al [ 48 ] studied the influences of N, P, K, Ca, and Mg on the quality of pineapple fruit and proved that increasing concentrations of K boosted concentrations of C in pineapple juice.…”

“…On the other hand, pH and total acid content in juice differed insignificantly between treatments at both sites ( Table 7 ). Cunha et al [ 29 , 51 ] also reported that fertilizing with N, P, K, Ca, and Mg did not affect the pH in pineapple juice compared to the no-fertilizer case. In this study, the average pH was from 3.41 to 3.70, providing evidence that fertilizing with N, P, K, Ca, and Mg had slight impacts on the parameters of the fruit quality of pineapple.…”

Cultural treatments in pineapple crop. Management for high yield – Review

“…In terms of nutritional requirement, nitrogen and potassium are the nutrients most required by pineapple (Omotoso & Akinrinde, 2013). Cunha et al (2020) evaluating the effects of nutrient omission in pineapple, cultivar BRS Vitória, found that only plants with nitrogen deficiency demonstrate visual symptoms, with new leaves presenting light green, while the other nutrients, even without visual symptoms, interfere in nutritional contents and vegetative and reproductive characteristics, such as diameter, length and weight of fruits. Bonomo et al (2020) investigated the effect of increasing doses of nitrogen (128, 256, 384 and 512 kg ha -1 of N) applied via fertigation on 'Pérola' pineapple, and four doses of potassium (192,384,576 and 768 kg ha -1 ) of K 2 O) in the edaphoclimatic conditions of São Mateus, Espirito Santo.…”

“…Regarding phosphate fertilization, Cunha et al (2020) observed that the deficiency of this nutrient reduces the diameter and length of the peduncle, causing lateral toppling of the fruits, dormancy of the lateral buds of shoots and reduction in the formation of seedlings, in addition to a reduction in the length and mass of the 'D' leaf in the occasion of floral induction.…”

“…Boron is the main micronutrient required by pineapple, and its deficiency can damage plant development and fruit formation. Cunha et al (2020) observed that plants deficient in Boron occur a reduction of 14% in length and 11% in the diameter of the fruit stalk, causing toppling and exposing the pineapple to sunburn. They also observed reductions in length and thickness of sheet 'D' of 10 and 23%, respectively, and in pulp firmness of 27% when compared to treatments well supplied with this element.…”