Improving growth, yield and fruit quality of strawberry by foliar and soil drench applications of humic acid

Document Type: Research Paper


Department of Horticultural Science, College of Agriculture, Shiraz University, Shiraz, I.R. Iran


Organic compounds including seaweed extract were applied in organic production system and sustainable agriculture. One of these compounds is humic acid that was used widely in research and commercial programs. Humic acid is an organic acid obtained from humus and other natural resources with hormonal effects and improving nutrient absorption, increasing root and shoot biomass. In order to investigate the effect of foliar and soil drench applications of humic acid on growth responses of strawberry, this research was conducted as a completely randomized design. Well-rooted daughter strawberry cv. Paros plants were potted in 3 liter plastic pots filled with leaf mold, field soil and sand (1:1:1 v:v:v). After the establishment of plants, Greenhum (13.5% humic acid) was sprayed at 300, 600, 900, and 1200 mg L-1 and soil drench was applied at 300, 450, 600, and 750 mg L-1 (250 ml pot-1). Results showed that foliar application at 600 and 900 mg L-1 produced the highest dry mass of shoot and root. Total acid of fruit in 750 mg L-1 soil application and in 300 mg L-1 foliar application were significantly higher than untreated control plants. The greatest vitamin C and TSS were obtained from 900 and 600 mg L-1 foliar application treatments, respectively. The highest flower numbers and yield were produced in 900 mg L-1 foliar application. In general, foliar application of Greenhum, especially at 600 and 900 mg L-1, significantly increased most evaluated parameters.


Main Subjects

Article Title [Persian]

بهبود رشد رویشی و زایشی توت فرنگی رقم پاروس با محلول پاشی و کاربرد خاکی هیومیک اسید

Authors [Persian]

  • سعید عشقی
  • مهدی گاراژیان
بخش علوم باغبانی، دانشکده کشاورزی، دانشگاه شیراز، شیراز، ج. ا. ایران
Abstract [Persian]

ترکیبات آلی از جمله عصاره جلبک های دریایی در کشاورزی ارگانیک و پایدار به کار برده می شوند. یکی از این ترکیبات هیومیک اسید است که به طور گسترده در پروژه های پژوهشی و تجاری کاربرد دارد. هیومیک اسید یک اسید آلی است که از هوموس و ترکیبات طبیعی به دست می آید و اثرات هورمونی داشته و باعث افزایش جذب عناصر غذایی و زیست توده ریشه و اندام هوایی می شود. به منظور بررسی اثر محلول پاشی و کاربرد خاکی هیومیک اسید بر پاسخ های توت فرنگی، پژوهش حاضر به صورت طرح کاملاً تصادفی انجام شد. گیاهان دختری ریشه دار شده توت فرنگی رقم پاروس در گلدان های پلاستیکی 3 لیتری پر شده با خاک برگ، خاک مزرعه و ماسه، (1:1:1 حجمی) کاشته شدند. پس از استقرار گیاهان ترکیب Greenhum (حاوی 5/13% هیومیک اسید به عنوان ماده موثره) با غلظت های 0، 300، 600، 900 و 1200 میلی گرم در لیتر به صورت محلول پاشی و 0، 300، 450، 600 و 750 میلی گرم در لیتر به صورت خاکی به کاربرده شدند. نتایج نشان داد که محلول پاشی این ترکیب در غلظت های 600 و 900 میلی گرم در لیتر بالاترین وزن خشک ریشه و شاخساره را ایجاد کرد. اسید کل میوه در کاربرد خاکی هیومیک اسید به میزان 750 میلی گرم در لیتر و محلول پاشی 300 میلی گرم در لیتر به طور معنی دار بیشتر از گیاهان شاهد بود. بالاترین ویتامین ث و TSS میوه به ترتیب از گیاهان محلول پاشی شده با 900 و 600 میلی گرم در لیتر به دست آمد. بالاترین تعداد گل و عملکرد را گیاهان تیمار شده با محلول پاشی 900 میلی گرم در لیتر تولید کردند. به طور کلی کاربرد گرین هام به ویژه در غلظت های 600 و 900 میلی گرم در لیتر به صورت محلول پاشی بیشتر پارامترهای بررسی شده را به طور معنی دار افزایش دادند.

Keywords [Persian]

  • Fragaria ananassa
  • هیومیک اسید
  • عصاره جلبک دریایی
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