漂浮盘系统种植的新鲜婴儿菠菜品质受氮肥和创新包装处理的影响。

Quality of fresh-cut baby spinach grown under a floating trays system as affected by nitrogen fertilisation and innovative packaging treatments.

机构信息

Postharvest and Refrigeration Group, Department of Food Engineering, Technical University of Cartagena, P. Alfonso XIII 48, 30203 Cartagena, Murcia, Spain.

出版信息

J Sci Food Agric. 2010 Apr 30;90(6):1089-97. doi: 10.1002/jsfa.3926.

DOI:10.1002/jsfa.3926

PMID:20355151

Abstract

BACKGROUND

Alternative techniques for cultivation of leafy vegetables such as a floating tray system and unconventional gas mixtures for post-harvest active modified atmosphere packaging (MAP) could be of interest in the minimally processed vegetable industry.

RESULTS

The combined effect of three pre-harvest fertilisation doses (8, 12 or 16 mmol N L(-1)) and three post-harvest MAP conditions (passive, super-atmospheric or N2O-enriched) on the main quality attributes of fresh-cut baby spinach leaves throughout 10 days at 5 degrees C was studied. After 8 days of shelf life, spinach leaves fertilised with 8 and 16 mmol N L(-1) and stored under N2O-enriched MAP showed the lowest microbial growth, with good sensory quality. Such combined treatments also preserved the total antioxidant capacity sampled at harvest (8 g ascorbic acid equivalent antioxidant capacity kg(-1) f.w.). A decrease of 10-20% in total vitamin C content regardless of N fertilisation and packaging treatment was found during shelf life. Total phenolics content at harvest was 2 g gallic acid equivalents kg(-1) f.w., which was slightly decreased or preserved during shelf life while total chlorophylls were preserved for all treatments assayed around 550 mg kg(-1) f.w.

CONCLUSION

No clear effect of fertilisation doses was observed during post-harvest storage on overall quality of fresh-cut baby spinach leaves, while N2O-enriched atmospheres seems to be a promising alternative to passive MAP for extending shelf life.

摘要

背景

对于叶菜类蔬菜的种植，例如漂浮托盘系统和非传统气体混合物，用于收获后的主动改良气氛包装（MAP），可能在最小加工蔬菜行业中具有吸引力。

结果

研究了三种收获前施肥量（8、12 或 16 mmol N L（-1））和三种收获后 MAP 条件（被动、超大气或 N2O 富集）对新鲜切割婴儿菠菜叶的主要质量属性的综合影响在 5°C 下持续 10 天。在货架寿命 8 天后，用 8 和 16 mmol N L（-1）施肥并在 N2O 富集 MAP 下储存的菠菜叶显示出最低的微生物生长，具有良好的感官质量。这种组合处理还保留了收获时的总抗氧化能力（8 g 抗坏血酸当量抗氧化能力 kg（-1）f.w.）。在货架寿命期间，无论氮施肥和包装处理如何，总维生素 C 含量均下降了 10-20%。收获时的总酚含量为 2 g 没食子酸当量 kg（-1）f.w.，在货架寿命期间略有下降或保留，而总叶绿素在所有处理中均保持在约 550 mg kg（-1）f.w.左右。