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تأثیر هرس تابستانه و محلول‌پاشی کلرید کلسیم قبل از برداشت بر انبارمانی میوه کیوی (رقم هایوارد)

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانش‌آموخته کارشناسی ارشد علوم باغبانی

2 دانشیار، گروه علوم باغبانی، دانشکده تولیدات گیاهی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان

3 دانشیار، گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه زنجان

4 کارشناس ارشد، مدیریت جهاد کشاورزی شهرستان چالوس (محقق کیوی)

چکیده

به‌منظور بررسی اثر هرس تابستانه و محلول‌پاشی کلرید کلسیم و زمان انبارداری بر برخی صفات کیفی کیوی فروت، آزمایشی به‌صورت فاکتوریل بر پایه طرح بلوک‌های کامل تصادفی در چهار تکرار در سال 90- 1389 در باغی خصوصی در شهرستان چالوس به اجرا درآمد. فاکتورها شامل:کلرید کلسیم در چهار سطح (0، 0/5، 1 و 1/5 درصد) و هرس تابستانه در چهار سطح (بدون هرس و باقی گذاشتن 2، 4 و 8 برگ پس از آخرین میوه) و زمان نگهداری در سردخانه درچهار سطح دو الی شش ماه بود.نتایج نشان داد که هرس میزان کلسیم گوشت میوه را افزایش و میزان مواد جامد محلول را کاهش و بر دیگر صفات کمی‌تأثیر معنی‌داری نداشت. محلول‌پاشی کلرید کلسیم بر میزان گوشت میوه در سطح 1 درصد معنی‌دار گردید. اثر متقابل تأثیر کلرید کلسیم و زمان بر میزان سفتی، مواد جامد محلول، ویتامین ث و pH معنی‌دار بوده به‌طوری‌که حداکثر اسید (1/118 گرم در صد میلی‌لیتر) و ویتامین ث (111/60 میلی‌گرم در صد میلی‌لیتر) با غلظت یک درصد وکمترین pH (3/445) و مواد جامد محلول (12/7 درصد) و حداکثر میزان سفتی گوشت (1/475 کیلوگرم بر سانتی‌متر مربع)، با غلظت 1/5 درصد در پایان شش ماه انبارداری ایجاد شده بود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Summer-Pruning and Preharvest Calcium Chloride Sprays Affect Storability in Kiwifruit cv. Hayward

نویسندگان [English]

  • Z Nazari 1
  • KH Hemmati 2
  • Rabiei Rabiei 3
  • M Alhzadeh 2
  • Y.Gh Khazayipol 4

1

2

3

4

چکیده [English]

Background and objectives
Kiwifruit is a good source of natural antioxidant substances, in particular vitamin C. The studies on kiwifruit post harvest handling and storability would be helpful in marketability of high quality fruits and indeed it would be beneficial to our country’s economy. In order to examine the effects of summer pruning combined with calcium chloride spray and duration of storage on some quality features of kiwifruit, the present research was undertaken as a complete block design in factorial arrangement with four replications.
Materials and methods
The project was conducted during 2008-9 in a commercial orchard in Chalos, Iran. The CaCl2 was applied in four concentrations (0, 0.5, 1.0 and 1.5 %) and pruning was carried out in four levels including no pruning, leaving 2, 4, 8 leaves after the last fruit. Storage period included four levels between two to six months.
Result
It was found that, summer pruning could increase calcium content of pulp. The total soluble solids decreased by pruning treatments but no significant changes were recorded for other quantitative traits. Calcium chloride applications significantly enhanced calcium content of pulp section (p<0.001). Furthermore, the interaction of calcium chloride and time may significantly influence firmness, vitamin C content, pH, total acidity and total soluble solids. Maximum total acidity (1.118 g/100 ml), vitamin C content (60.111 mg/100 ml) was observed following spraying 1% CaCl2. Also, the lowest pH (3.445) and total soluble solids (12.7%) and maximum firmness (1.475) were recorded following application of 1.5% CaCl2, six months after storage.
Discussions
The results showed that the treatments had a significant effect on some traits and summer pruning improves fruit calcium's. Absolute increasing on fruit calcium density means sprayed calcium can penetrate in fruit epiderm and it can be because of weakness in cell membrane during development that can simplify calcium penetration. Also, summer pruning can increase fruit quality and improving antioxidant system and vitamin C by effect on light and air circulate in tree canopy and can increase calcium density in fruit texture by enhancing transpiration in fruits, because cutting the end part of developing shoots make reduction in competition between element absorption especially calcium element and make it flowed to set fruit.
 
 
 

کلیدواژه‌ها [English]

  • Calcium chloride
  • Summer pruning
  • Kiwifruit
  • Storage
مراجع
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تولیدات گیاهی
دوره 39، شماره 3 - شماره پیاپی 3
آذر 1395
صفحه 77-90
فایل ها
هم رسانی
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