تحقیقات علوم زراعی در مناطق خشک

تحقیقات علوم زراعی در مناطق خشک

تأثیر محلول‎پاشی سیلیکات پتاسیم و نیترات کلسیم بر عملکرد دانه، رنگدانه‎های فتوسنتزی و غلظت عناصر معدنی دانه گلرنگ (Carthamus tinctorius) در شرایط دیم

نوع مقاله : مقاله پژوهشی

نویسندگان
1 دانشجوی کارشناسی ارشد، گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه صنعتی شاهرود، شاهرود، ایران
2 گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه صنعتی شاهرود، شاهرود، ایران
چکیده
به منظور بررسی محلول‎پاشی نیترات کلسیم و سیلیکات پتاسیم بر گیاه گلرنگ در شرایط دیم، آزمایشی بصورت فاکتوریل و در قالب طرح بلوک‎های کامل تصادفی با سه تکرار اجرا گردید. تیمارهای آزمایش شامل سیلیکات پتاسیم و نیترات کلسیم هر یک در سه سطح صفر، 1 و 2 کیلوگرم در هزار لیتر آب بودند. نتایج نشان داد اثر متقابل نیترات کلسیم و سیلیکات پتاسیم تأثیر معنی‎داری بر عملکرد دانه، عملکرد زیستی، تعداد شاخه جانبی و وزن هزار دانه داشت و سبب افزایش آنها شد. بیشترین عملکرد دانه در سطح یک کیلوگرم در هزار لیتر آب سیلیکات پتاسیم و نیترات کلسیم (1034 کیلوگرم در هکتار) بود. بجز فلاونوئید اثر متقابل سیلیکات پتاسیم و نیترات کلسیم تأثیر معنی‎داری بر مقدار کلروفیل a، b، کارتنوئید و آنتوسیانین در برگ داشت. بیشترین مقدار کلروفیل a و کارتنوئید در سطح دو کیلوگرم در هزار لیتر آب نیترات کلسیم و سیلیکات پتاسیم بود. غلظت نیتروژن و پتاسیم دانه همراه با افزایش غلظت سیلیکات پتاسیم و نیترات کلسیم افزایش یافت بطوریکه بیشترین درصد نیتروژن دانه در سطح دو کیلوگرم در هزار لیتر آب سیلیکات پتاسیم و نیترات کلسیم (5/01 درصد) و در مورد پتاسیم دانه در سطح دو و یک کیلوگرم در هزار لیتر آب سیلیکات پتاسیم و نیترات کلسیم (4/97 درصد) حاصل شد. براساس نتایج این آزمایش می‎توان بیان کرد که محلول‎پاشی یک کیلوگرم سیلیکات پتاسیم و دو کیلوگرم نیترات کلسیم در هزار لیتر آب برای گلرنگ در شرایط دیم مناسبتر است.
کلیدواژه‌ها

عنوان مقاله English

Effects of foliar application of potassium silicate and calcium nitrate on grain yield, photosynthetic pigments and concentration of mineral elements of in seed of safflower at a dry condition

نویسندگان English

Ali Shadrooz 1
Mostafa Heidari 2
Mehdi Baradaran Firouzabadi 2
1 Master's student, Agronomy and Plant Breeding Department, Agricultural Collage, Shahrood University of Technology, Shahrood, Iran
2 Agronomy and Plant Breeding Department, Agricultural Collage, Shahrood University of Technology, Shahrood, Iran
چکیده English

Introduction: Water is a limiting factor in agriculture, deficit of water reducing plant development and yield. The need to maintain quality in water scarcity condition, mineral nutrition plays a beneficial role in developing environmental stress tolerance in crop plants. Potassium (K+) is a phyto-beneficial macro-element that performs a pivotal role in organizing physio-biochemical processes to support plant survival against abiotic stresses. Also Silicate fertilization is a promising technology because silicon (Si) has been used as an elicitor of resistance in plants under conditions of abiotic stress, such as saline, heavy metal poisoning or water stress. The accumulation of Si in transpiration organs causes the formation of a double layer of silic, with a subtle decrease in opening of the stomata, reducing leaf transpiration, which restricts the loss of water without influencing growth. Calcium is an essential element for plants, functioning as a second messenger in cells, and can influence aquaporin on membrane structures, helping plants resist many kinds of environmental stress. It is widely accepted that Calcium ions (Ca2+) can facilitate plants resist drought stress. Among exogenous substances discovered to alleviate plant stresses, calcium ion has proven to be more effective and the cost/benefit efficient, not only as an essential nutrient for the plant growth actively involving in a various metabolic activities and as an intracellular messenger for many signal transductions, such as abscise acid (ABA), reactive oxygen species (ROS), nitric oxide.
Materials and Methods: In order to investigate foliar application application of calcium nitrate and potassium silicate on photosynthetic pigments and concentration of mineral elements in seed of safflower in a dry condition, a factorial experiment as randomized complete block design with threereplications, was conducted. The treatments included potassium silicate at three level: (PS): 0, 1, and 2 and calcium nitrate at three level: (CaN): 0, 1, and 2 kg per thousand liters of water. Foliar application was done in two times. The first time at the beginning of the spring growing season. The second foliar application was done two weeks after the first one.
Results and Discussion: The results showed that the interaction between CaN and PS had a significant effect on grain yield and yield components. The highest grain yield was related to the second level of PS and CaN (1034 kg ha-1). Maximum biological yield (31.6%) and the number of branches in per plant (28.1%) were obtained at the second level of PS and the third level of CaN. Except flavonoid, interaction between PS and CaN had a significant effect on the chlorophyll “a”, “b”, carotenoid and anthocyanin in leaves. The highest amount of chlorophyll “a “and carotenoid was in the third level of CaN and PS, and about anthocyanin, it was in the third level of CaN and the second level of PS. The concentration of nitrogen and potassium in the seed were increased by increasing the concentration of PS and CaN. The highest concentration of nitrogen was at the third level of PS and CaN (5.01%), and about potassium, it was 4.97% in the third level of PS and the second level of CaN.
Conclusion:  The use of compounds that help plants in low humidity conditions can partially reduce the adverse effects of dehydration on plants and prevent the reduction of production performance in these conditions. Based on the results obtained in this experiment, it can be stated that calcium nitrate and potassium silicate had a positive role in the safflower plant in dry conditions, so that the use of these two compounds improved the grain yield and grain yield components. This increase was due to the improvement of photosynthetic pigments and physiological parameters.  

کلیدواژه‌ها English

Dry farming
Nutrient elements
Physiological characteristics
Quantitative yield
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  • تاریخ دریافت 21 مهر 1402
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