Effects of K/Ca ratios of Nutrient Solution on Some Physiological Traits and Cut Flower Vase Life of Rose Cultivars (Capitol and Magic Red)

Document Type : Research Paper

Authors

1 Former MSc student of Horticulture, University of Tabriz, Tabriz, Iran

2 Landscape Engineering Dept., University of Tabriz, Tabriz, Iran

3 Horticulture Dept., University of Shahed, Tehran

4 2Landscape Engineering Dept., University of Tabriz, Tabriz, Iran

Abstract

An experiment was conducted to investigate the effects of K/Ca ratios of nutrient solution on physiological traits, cut flower vase life and postharvest changes of rose. The main experiment was factorial based on completely randomized design with two cvs. of rose (Magic Red and Capitol), five K/Ca ratios in the nutrient solution (4:4, 6:4, 6:3, 8:3, 10:2) and three replications. Increasing the K/Ca ratio in the solution led to accumulation of K in the leaves but decreased the Ca concentration of the leaves. Furthermore, K/Ca ratio of the leaves was affected by K/Ca ratio of the nutrient solution and highest ratio of K/Ca was recorded for the leaves of plants fed with nutrient solution of 10:2 K/Ca ratio and the lowest K/Ca ratio of leaves was observed for plants which supplied with the nutrient solutions of 4:4 and 6:4 K/Ca ratios. The highest chlorophyll index was recorded for Capitol cv. and K/Ca ratios of nutrient solution had significant different effects on chlorophyll fluorescence. It was noted that rising K/Ca ratio caused lower longevity of cut flowers in both cvs. The highest necrosis of petals was occurred at 10:2 ratio of K/Ca and Magic Red cv. was more sensitive with the highest percentage of necrosis. The appropriate K/Ca ratio was obtained in the 6:4 ratio in terms of nutritional balance, reduced antagonistic effects of K and Ca, postharvest quality and more longevity of cut flowers.
 

Keywords


Article Title [فارسی]

تاثیر نسبت‌های پتاسیم به کلسیم محلول غذایی بر برخی صفات فیزیولوژیکی و طول عمر گل بریده ارقام رز (کاپیتول و مجیک رد)

Abstract [فارسی]

این آزمایش به منظور بررسی اثر نسبت ­های مختلف پتاسیم به کلسیم محلول غذایی بر صفات فیزیولوژیکی، طول عمر گل  بریده و تغییرات پس از برداشت رز انجام شد. آزمایش به صورت فاکتوریل بر اساس طرح کاملا تصادفی با دو رقم رز (کاپیتول و مجیک رد)، پنچ نسبت پتاسیم به کلسیم محلول غذایی (4:4، 6:4، 6:3، 8:3 و 10:2) و در سه تکرار پیاده شد. افزایش نسبت پتاسیم به کلسیم محلول غذایی منجر به تجمع پتاسیم ولی کاهش کلسیم در برگ­ها شد. علاوه براین، نسبت پتاسیم به کلسیم برگ­ها تحت تاثیر نسبت پتاسیم به کلسیم محلول غذایی قرار گرفت و بالاترین میزان نسبت پتاسیم به کلسیم برای برگ­های تغذیه شده با محلول غذایی با نسبت 10:2 ثبت شد و پایین ترین میزان نسبت پتاسیم به کلسیم برای برگ­های تغذیه شده با محلول غذایی با نسبت­های پتاسیم به کلسیم 4:4 و 6:4 به دست آمد. بیشترین شاخص کلروفیل برای رقم کاپیتول یادداشت شد و نسبت­های مختلف پتاسیم به کلسیم محلول غذایی اثرات مختلف معنی­داری بر فلورسانس کلروفیل داشتند. افزایش نسبت  پتاسیم به کلسیم موجب کاهش طول عمر گل بریده هر دو رقم شد. بالاترین میزان نکروز گلبرگ­ها در نسبت 10:2 اتفاق افتاد و رقم مجیک رد حساسیت بیشتر و بالاترین درصد نکروز را داشت. مناسبترین نسبت پتاسیم به کلسیم از لحاظ تعادل غذایی، کاهش اثرهای آنتاگونیستی پتاسیم و کلسیم، کیفیت پس از برداشت و طول عمر بیشتر گل­های بریده در نسبت 6:4 اخذ شد.
 
 

Keywords [فارسی]

  • پس از برداشت
  • رز
  • عمر گل-جایی
  • نسبت پتاسیم به کلسیم
  • نکروز
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