اثر هرس تابستانه و محلول‌پاشی با کلسیم بر ترکیبات معدنی و کیفیت میوه‌ی کیوی رقم ’هایوارد‘

نوع مقاله: مقاله کامل

نویسندگان

1 دانشجوی سابق کارشناسی ارشد، دانشکده کشاورزی، دانشگاه گیلان

2 عضو هیات علمی دانشگاه

3 پژوهشگر، مؤسسه تحقیقات مرکبات کشور، رامسر

چکیده

انجام هرس تابستانه و محلول‏پاشی کلسیمی می‏تواند کیفیت میوه‏های کیویرا بهبود بخشد. در این پژوهش، اثر هرس تابستانه در دو زمان، 2 و 15 روز بعد از ریزش گلبرگ‏ها به‌تنهایی یا همراه با محلول‏پاشی کلرید کلسیم 1‌درصد بر کیفیتو مقدار عناصر معدنی میوۀ کیوی رقم ’هایوارد‘ بررسی شده است. محلول‏پاشی کلسیمی 90 روز بعد از ریزش گلبرگ‏ها، با فاصلۀ 15 روز یک بار، جمعاً چهار مرحله انجام شد. نتایج نشان داد که هرس تابستانه، به‌ویژه دو روز بعد از ریزش گلبرگ‏ها قطر و وزن میوه‏ها و میزان مواد جامد محلول (TSS) را به‌طور معنا‏داری افزایش داده است. همین‌طور، درختان شاهد (بدون هرس تابستانه و محلول‏پاشی کلسیمی) کمترین میزان ویتامین ث و مادۀ خشک را داشته‏اند.میزان کلسیم و منیزیم میوه‏ها و همچنین نسبت بین عناصر غذایی به‌طور معنا‏داری تحت‌تأثیر هرس تابستانه و تیمار کلسیم قرار گرفته‏اند، به‌عکس، میزان نیتروژن، فسفر و پتاسیم تحت‌تأثیر آن‌ها قرار نگرفته‏اند. انجام هرس دو روز بعد از ریزش گلبرگ‏ها به‌تنهایی یا همراه با محلول‏پاشی کلسیمی در درختان، بالاترین میزان کلسیم و کمترین میزان منیزیم را نشان دادند. بالاترین نسبت عناصر غذایی، K/Ca، Mg/Ca، N/Ca در درختان شاهد (‌بدون انجام هرس و محلول‏پاشی) دیده شده است. در‌مجموع، انجام هرس تابستانه و محلول‏پاشی با کلسیم با افزایش مقدار کلسیم و کاهش نسبت برخی از عناصر غذایی به کلسیم میوه، کیفیت میوه‏های کیوی را بهبود بخشیده است.‌

کلیدواژه‌ها


عنوان مقاله [English]

Effect of summer pruning and spray with calcium on mineral composition and fruit quality of kiwifruit cv. Hayward

نویسندگان [English]

  • Seyede Masoomeh Heidary Barkadehei1 1
  • Mahmood Ghasemnezhad 2
2 Associate Professor
چکیده [English]

Summer pruning and calcium spray could improve kiwifruits quality. In this study, effect of summer pruning in two times, 2 and 15 days after petal fall alone or in combination with %1 calcium chloride spray on fruit quality and mineral elements contents of ‘Hayward’ kiwifruit was investigated. Calcium sprayed four times 90 days after petal fall with 15 days intervals. The results showed that summer pruning, especially 2 days after petal fall significantly increased fruit diameter, fruit weight and total soluble solid (TSS). Control vine )without summer pruning and calcium spray) had the lowest dry matter and vitamin C content. Fruit calcium and magnesium concentration and also nutrient elements ratios were significantly affected by summer pruning and calcium spray. In contrast, nitrogen, phosphorus and potassium content were not affected by them. The highest calcium and the lowest magnesium content were found in the vines that pruned 2 day after petal fall alone or in combination with calcium spray. The highest nutrient elements ratios, K/Ca, Mg/Ca, N/Ca was found in control vine (without pruning and calcium spray). Overall, summer pruning and calcium spray could ...

کلیدواژه‌ها [English]

  • nutrient elements
  • Calcium Chloride
  • dry matter
  • pruning
  • Correlation
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