نوع مقاله : مقالات پژوهشی
نویسندگان
1 دانشگاه آزاد اسلامی واحد رشت
2 آزاد اسلامی واحد رشت
چکیده
در سالهای اخیر، اسید هیومیک برای ارتقای ویژگیهای کمی و کیفی گیاهان زراعی و باغی استفاده میشود. یک آزمایش گلدانی برای ارزیابی کاربرد برگی اسید هیومیک و بسترهای کشت مختلف روی ویژگیهای مورفولوژیک، گلدهی و میوهدهی توتفرنگی (Fragaria ×ananassa) ارقام ’محلی‘ و ’سلوا‘ در شهرستان رشت انجام شد. غلظتهای مختلف اسید هیومیک (صفر، 300، 600 و 1000 میلیگرم بر لیتر) بهصورت محلولپاشی برگی در دو مرحله (اواخر فروردین در مرحلهی سهبرگی و اواخر اردیبهشت در مرحلهی پنجبرگی) روی دو رقم ’محلی‘ و ’سلوا‘ کاشتهشده در بسترهای مختلف (خاک معمولی و مخلوط خاک معمولی همراه با سبوس برنج، پرلیت و ضایعات چای) بهکار گرفته شدند. این پژوهش بهصورت فاکتوریل بر پایهی بلوک کامل تصادفی در 4 تکرار اجرا شد. کاربرد اسید هیومیک، رشد و بازدهی توتفرنگی را افزایش داد. نتایج نشان داد که بیشترین تعداد شاخه یا استولون (82/14 عدد در بوته) در رقم ’سلوا‘ کاشتهشده در بستر خاک معمولی همراه با ضایعات چای تیمارشده با 1000 میلیگرم بر لیتر اسید هیومیک بهدست آمد. بالاترین وزن میوه (45/35 گرم) و بیشترین تعداد میوه (41/15 عدد در بوته) در رقم ’سلوا‘ کاشتهشده در بستر خاک معمولی همراه با پرلیت تیمارشده با 1000 میلیگرم بر لیتر اسید هیومیک بهدست آمد. این وزن و تعداد میوه حدود چهار برابر وزن و تعداد میوه در شاهد بود. بیشترین تعداد برگ (03/16 عدد در بوته) در رقم ’محلی‘ کاشتهشده در بستر خاک معمولی همراه با سبوس برنج و تیمارشده با 300 گرم بر لیتر اسید هیومیک بهدست آمد. کمترین تعداد (58/3) و وزن (23/8 گرم) میوه در رقم ’محلی‘ کاشتهشده در بستر خاک معمولی بدون تیمار با اسید هیومیک بهدست آمد. این نتایج نشان میدهد که کاربرد برگی اسید هیومیک میتواند برای افزایش ویژگیهای کمی و کیفی میوهی توتفرنگی مفید باشد. در مجموع، با توجه به اهمیت میوه در گیاه توتفرنگی، بهترین تیمار؛ 1000 میلیگرم بر لیتر اسید هیومیک در بستر کشت مخلوط خاک معمولی همراه با پرلیت برای رقم ’سلوا‘ معرفی میگردد.
کلیدواژهها
موضوعات
عنوان مقاله [English]
Leaf Application of Humic Acid on Morphologic, Flowering and Fruit Traits of ‘Local’ and ‘Selva’ Strawberry Cultivars under Different Cultivation Beds
نویسندگان [English]
- Mohammadreza Safari Motlagh 1
- Behzad Kaviani 2
- Jaleh Ashegh 2
1 rasht
2 rasht
چکیده [English]
Introduction: In recent years, applying humic acid has been common in enhancing the quantitative and qualitative characteristics of crops. The use of biofertilizers instead of chemical fertilizers has an effective role in increasing the health of plants, animals, and humans, and reducing environmental pollution. Chemical fertilizers are gradually being replaced by biofertilizers. Strawberry is a fruit with high nutritional value. Choosing the right nutritional conditions such as fertilizers and suitable cultivation beds to achieve high quantitative and qualitative yield in this plant is inevitable. In recent years, the use of humic acid has been common in enhancing the vegetative and generative characteristics of crops. Humic acid is a rich source of potassium, phosphorus and nitrogen. The method of application of humic acid has an effective role in improving the quantitative and qualitative characteristics of plants. Combining some cultivation beds such as perlite, composts, and fertilizers including agricultural waste (such as rice bran and tea wastes) into soil cultivation beds have had an effective role for improving the quantity and quality of plants.
Materials and Methods: A pot experiment was conducted to evaluate the effects of foliar application of humic acid and different cultivation beds on morphology, flowering and fruiting of two strawberry (Fragaria × ananassa) cultivars ‘Local’ and ‘Selva’ in Islamic Azad University, Rasht Unit, on 2016. Different concentrations of humic acid (0, 300, 600, and 1000 mg l−1) were applied as foliar application in two steps (late March containing three leaves and late April containing five leaves) on strawberries cultivated in different beds (usual soil and usual soil with rice bran, or perlite, or tea wastes). The experiment was carried out as factorial based on a randomized complete block design (RCBD) with four replications. Some traits including plant height, root number, root length, leaf length, shoot number, shoot length, shoot diameter, leaf number, node number, flowering time, flower diameter, flower number, fruit number and fruit weight were measured.
Results and Discussion: Analysis of variance showed that the interaction effect of humic acid × cultivation bed ×cultivar on plant height, shoot length, shoot number, leaf number, root length, root number, flower diameter (p≤0.01), fruit weight, and fruit number (p≤0.05) was significant. The interaction effect of these three factors on shoot or stolon diameter, leaf length, flowering time and flower number was not significant. Results of mean comparison showed that the highest shoot or stolon number (14.82) were obtained in ‘Selva’ cultivar treated with 1000 mg l−1 humic acidcultivatedin usual soil with tea wastes. The highest fruit weight (35.45 g) and fruit number (15.41 per plant) were obtained in ‘Selva’ cultivar treated with 1000 mg l−1 humic acidcultivatedin usual soil with perlite. The maximum leaf number (16.03 per plant) was obtained in the treatment of 300 mg l−1 humic acid and the cultivation bed of usual soil and rice bran in ‘Local’ cultivar. Minimum fruit number (3.58) and fruit weight (8.23 g) were obtained in ‘Local’ cultivar cultivated in usual soil bed without humic acid. The highest number of root (19.56) was obtained in the treatment of 600 mg l−1 humic acid and the cultivation bed of usual soil with perlite in ‘Local’ cultivar. The highest amount of flower diameter (7.85 mm) was calculated in the treatment of 1000 mg l−1 humic acid and the cultivation bed of usual soil with tea wastes on ‘Selva’ cultivar. These results suggest that humic acid foliar application might be benefit to enhance fruit characteristics of strawberry. Totally, humic acid application increased growth and yield of strawberry. Since the most important parameters for increasing the quality of strawberry fruit is fruit characteristics, it is recommended to use 1000 mg l−1 of humic acid cultivated in the usual soil mixture with tea wastes. Strawberries are widely cultivated worldwide due to their high nutritional value. Chemical fertilizers have been used as a way to increase crop yields, but have led to problems such as nitrate accumulation, pot life, and poor quality and environmental pollution. Therefore, organic fertilizers have been used. Humic acid can improve quantitative and qualitative production by having properties such as providing more available essential elements and increasing plant resistance to various biological and non-biological stresses. A positive association has been reported between the use of humic acid and the increases in growth, yield and product quality in strawberries and other plants. Proper cultivation bed plays an important role in the optimal growth and development of plants. Salinity increases osmotic stress, ion toxicity, oxidative stress and food imbalance. The use of compost fertilizer and foliar application of humic acid increased the growth, yield and quality of strawberry fruit.
کلیدواژهها [English]
- Humic acid
- Cultivar
- Cultivation beds
- Flowering
- Strawberry
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