ISO 3631:2019 柑橘系の果物—保管のガイドライン | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee SC 3, Fruits and vegetables and their derived products.

This second edition cancels and replaces the first edition (ISO 3631:1978), which has been technically revised. The main changes compared with the previous edition relate to storage temperatures, durations and cultivars.

Introduction

Citrus fruits are divided into five major groups from different species which differ from each other in their behaviour during transport and should therefore be considered separately from the point of view of storage conditions. The groups are the following:

• oranges;
• mandarins, tangerines and their hybrids;
• lemons;
• grapefruits and their hybrids;
• limes.

Citrus fruits undergo little change after harvesting. They have no climacteric phase, and should therefore be harvested ready for consumption.

Peel colour is not always an indication of maturity; there is not necessarily a direct relation between colour and degree of ripeness.

The keeping life of the fruit depends on several factors, including the following:

• growing climate conditions;
• agrotechnical factors (nature of rootstock, size of fruits, method of pruning, etc.);
• harvesting conditions (time of picking, condition of fruit at harvest);
• degree of maturity and treatments during storage; keeping temperature;
• relative humidity of the store.

The longer the fruits remain on the trees after they have reached edible condition, the shorter the time they can be kept after harvest. However, growth regulators can be used to enhance the keeping quality of late harvest fruit.

1 Scope

This document specifies the conditions required for good keeping of the following groups of citrus fruits during their storage with or without refrigeration, in stores or in various transport equipment (such as containers, railway cars, trucks or ships):

• oranges: Citrus sinensis (Linnaeus) Osbeck;
• mandarins: Citrus reticulata Blanco;
• lemons: Citrus limon (Linnaeus) N. L. Burman;
• grapefruits: Citrus paradisi Macfadyen;
• limes:
  • Citrus aurantifolia (Christmann) Swingle;
  • Citrus latifolia Tanaka.

2 Normative references

There are no normative references in this document.

3 Terms and definitions

No terms and definitions are listed in this document.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

Bibliography