تولیدات گیاهی

شماره جاری

بر اساس شماره‌های نشریه

بر اساس نویسندگان

بر اساس موضوعات

نمایه نویسندگان

نمایه کلیدواژه ها

درباره نشریه

اهداف و چشم انداز

بانک ها و نمایه نامه ها

پرسش‌های متداول

اخبار و اعلانات

راهنمای تهیه مقاله

فرم های نشریه

اثر زمان برداشت و طول مدت انبارمانی بر برخی ویژگی‌های فیزیکی و بیوشیمیایی میوه انار رقم ملس پوست زرد ‘Malas Post Zard’) .(Punica granatum L

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانش‌آموخته کارشناسی ارشد باغبانی، دانشگاه علوم کشاورزی و منابع طبیعی خوزستان، ملاثانی، ایران

2 دانشیار، گروه باغبانی، دانشگاه علوم کشاورزی و منابع طبیعی خوزستان، ملاثانی، ایران

چکیده

اطلاعات محدودی در زمینه جنبه‌های قبل از برداشت که می‌تواند فیزیولوژی پس از برداشت میوه انار (Punica granatum L.) را تحت تأثیر قرار دهد وجود دارد. هدف آزمایش حاضر، تعیین تغییرات شاخص‌های کیفی میوه انار در ناحیه باغملک (استان خوزستان، جنوب غربی ایران) تحت تأثیر مرحله بلوغ در زمان برداشت و مدت انبارمانی بود. میوه‌های انار رقم ملس پوست زرد در سه زمان برداشت (بیست و سوم شهریورماه، هفتم مهرماه و بیست و یکم مهرماه 1390) برداشت شده و به مدت 40 و 80 روز در دمای 7+ درجه سانتی‌گراد نگهداری گردید. در هر مرحله برداشت و یا پس از 40 یا 80 روز انبارمانی، برخی شاخص‌های فیزیکی (رنگ سطحی، پوسیدگی و چروکیدگی) و بیوشیمیایی (اسکوربیک اسید، مواد جامد محلول، اسیدیته قابل تیتراسیون، pH، شاخص آنتوسیانین و شاخص‌های رنگ قهوه‌ای آب‌میوه) اندازه‌گیری شدند. نتایج نشان دادند بدون در نظر گرفتن دوره انبارمانی، میوه‌های انار در میزان غلظت مواد جامد محلول، اسیدیته قابل تیتراسیون، pH و شاخص آنتوسیانین در آب‌میوه تفاوت معنی‌داری داشتند. برهمکنش اثرهای زمان برداشت و مدت انبارمانی (40 و 80 روز) بر چگالی، تغییر رنگ و چروکیدگی میوه، ویتامین ث، پ‌هاش، اسیدیته قابل تیتراسیون و رنگ آب‌میوه (شاخص آنتوسیانین و شاخص رنگ قهوه‌ای) معنی‌دار بود. نتایج نشان دادند برداشت میوه‌های انار در زمان‌های مختلف، شاخص‌های کیفیت ظاهری و ویژگی‌های بیوشیمیایی میوه را تحت تأثیر قرار داد و در زمان برداشت اول (بیست و سوم شهریورماه) موجب کاهش کیفیت میوه گردید ولی این میوه‌ها غیرقابل مصرف نبودند.

تازه های تحقیق

 

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effects of Harvest Time and Storage Duration on Some Physical and Biochemical Indices in Pomegranate (Punica granatum L.) Fruits

نویسندگان [English]

  • F. Paimard 1
  • M. Heidari 2

1 M.Sc. Graduate of Horticulture, Khuzestan Agricultural Sciences and Natural Resources University, Mollasani, Iran

2 Associate Professor, Department of Horticulture, Khuzestan Agricultural Sciences and Natural Resources University, Mollasani, Iran

چکیده [English]

Abstract
Background and Objectives
Preharvest and harvest conditions can affect quality and biochemical composition of fruit during storage. Pomegranate (Punica granatum L.) is a non-climactric fruit and there is no clear physiological index to determine the proper harvest time. Lack of standard maturity index results in prolonged period of picking pomegranate fruit within the season. The effects of different physical or chemical treatments on postharvest quality of pomegranate fruit have been investigated in many studies, but our knowledge on the pre-harvest and harvest aspects that influence pomegranate fruit postharvest physiology is scarce. The objective of the present experiment was to determine how qualitative indices of pomegranate fruit in ‘Bagmalek’ (Khuzestan, southwest of Iran) are affected by maturity stages at harvest and storage duration.
Materials and Methods
A factorial design including three harvesting times and three storage durations with three replications was used for statistical analysis. Fruits of ‘Malas Post Zard’ as an important pomegranate cultivar were harvested from a commercial orchard in ‘Bagmalek’ (150 Km Ahwaz, Khuzestan, southwest of Iran). Fruits were harvested at three harvest times at 14-day intervals (14 September, 29 September and 13 October 2011) and stored for 40 and 80 days at +7 oC. Some physical (weight, surface color, decay and shriveling) and biochemical characteristics (ascorbic acid, total soluble solids, titratable acidity, pH, anthocyanin index and browning index) were evaluated. The factors were evaluated at harvest time and after 40 and 80 days.
Results
Regardless of storage durations, pomegranate fruit showed significant variations in total soluble solids, titratable acidity, pH and anthocyanins. Interactions of the harvest time and storage duration (for 40 and 80 days) were significant on gravity, surface color changes, shriveling, ascorbic, acid, pH, titratable acidity and fruit juice pigments (anthocyanin index and browning index). Results showed that the period 29 September until 13 October 2011 and storage duration for 40 days are the best treatments to maintaining postharvest quality of ‘Malas Post Zard’ fruits in ‘Bagmalek’ (Khuzestan, Iran).
Discussion
Results showed that quantity and quality indices of the pomegranate could be improved through the selection of proper harvesting time. Harvest of pomegranate fruit at different maturity stages altered fruit appearance quality indices and biochemical characteristics under ‘Bagmalek’ geographic condition, and at early harvest time (14 September), it reduced fruit quality but did not make its consumption unacceptable. More research needs to assess the effect of different climatic parameters such as temperature and light intensity on the postharvest quality of pomegranate fruits in Khuzestan.

کلیدواژه‌ها [English]

  • Harvest time
  • Fruit
  • Pomegranate (Punica granatum L.)
  • Postharvest quality
  • Storage
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تولیدات گیاهی
دوره 41، شماره 1
خرداد 1397
صفحه 57-68
فایل ها
هم رسانی
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