Post-harvest characterization of ‘Prata’ banana cultivar grown under different nitrogen and potassium fertilization

Abstract There are several banana cultivars resistant to Black Sigatoka disease and to Panama disease, but due to the lack of information regarding post-harvest characteristics, many are rejected in the market. Nitrogen and potassium fertilization may help to improve the sensory characteristics of ripe banana, but there is lack of studies on its effects on banana cultivation, especially those resistant to diseases. The aim of this study was to evaluate the post-harvest characteristics of ‘Prata-Anã’, ‘BRS Platina’ and ‘PA94-01’ banana cultivars at four N and K2O fertilization levels (NK0: no fertilization, NK1: 175 and 285 kg ha-1 year-1, NK2: 350 and 570 kg ha-1 year-1, NK3: 525 and 855 kg ha-1 year-1, respectively) in three production cycles. It could be concluded that N and K doses adopted in this work did not influence the post-harvest physicochemical characteristics of ‘Prata-Anã’, ‘BRS Platina’ and ‘PA94-01’ banana cultivars. Regardless of N and K doses, ‘Prata-Anã’, ‘BRS Platina’ and PA94-01’ banana cultivars presented differences regarding post-harvest physicochemical characteristics. Production cycles did not influence the physical characteristics but differed in post-harvest chemical characteristics in ‘Prata-Anã’, ‘BRS Platina’ and ‘PA94-01’ banana cultivars.

摘要：目前已有多个抗黑条叶斑病（Black Sigatoka）及巴拿马病（Panama disease）的香蕉品种，但由于缺乏其采后特性（post-harvest characteristics）相关研究数据，多数此类品种在市场中被拒收。氮钾配施或可改善成熟香蕉的感官品质，但目前针对其在香蕉种植中的效应研究仍较为匮乏，尤其是针对抗病品种的相关研究。本研究旨在评估三个种植周期内，‘普拉塔阿纳（Prata-Anã）’、‘BRS普拉蒂纳（BRS Platina）’与‘PA94-01’三个香蕉品种在4个氮（N）与氧化钾（K₂O）配施水平下的采后特性：NK0组为不施肥，NK1组施氮175 kg·ha⁻¹·年⁻¹、氧化钾285 kg·ha⁻¹·年⁻¹，NK2组施氮350 kg·ha⁻¹·年⁻¹、氧化钾570 kg·ha⁻¹·年⁻¹，NK3组施氮525 kg·ha⁻¹·年⁻¹、氧化钾855 kg·ha⁻¹·年⁻¹。本研究结果表明，本次试验所采用的氮钾施用量，对三个香蕉品种的采后理化特性（physicochemical characteristics）无显著影响。无论氮钾施用量如何，三个香蕉品种的采后理化特性均存在显著差异。对于‘普拉塔阿纳’、‘BRS普拉蒂纳’与‘PA94-01’三个香蕉品种而言，种植周期未对其物理特性产生影响，但会显著影响其采后化学特性。