B. Parsa Motlagh; P. Rezvani Moghadam; R. Ghorbani; Zabihollah Azami Sardooei
Abstract
In order to evaluate the effects of different fertilizer systems and irrigation water on some phytochemical characteristics of Roselle (Hibiscus sabdariffa L.), a field experiment was conducted at the University of Jiroft during 2013 and 2014. The study was conducted as split plot based on a randomized ...
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In order to evaluate the effects of different fertilizer systems and irrigation water on some phytochemical characteristics of Roselle (Hibiscus sabdariffa L.), a field experiment was conducted at the University of Jiroft during 2013 and 2014. The study was conducted as split plot based on a randomized complete blocks design with three replications. Three irrigation levels (100%, 80% and 60% of crop water requirement) were assigned as main plot factor. Four fertilizers including mycorrhiza, vermicompost, cow manure, and chemical fertilizer (NPK) were allocated as sub plot factor. The results indicated that fertilizer treatments and different irrigation water levels had significant effect on total phenol, anthocyanin, acidity of calyx, seed protein and seed oil. The highest and lowest anthocyanin (3.05 and 2.78 ml.gr-1), total phenol (12.52 and 12.90 ml.gr-1) and acidity of calyx (0.81 and 0.87 gr.100 gr dry weight) belonged to vermicompost and cow manure. Also, 60% and 100% crop water requirement produced the highest and lowest anthocyanin (3 and 2.19 ml.gr-1), total phenol (13.04 and 10.81 ml.gr-1) and seed protein (20.90% and 20.01%). Furthermore, the interaction effect of fertilizer systems and irrigation levels had a significant effect on anthocyanin content. The interaction effect of irrigation levels and year had a significant effect on oil seed. Vitamin C was not affected by experimental treatments.
F. Abbaspour; H.R. Asghri; P. Rezvani Moghaddam; H. Abbasdokht; J. Shabahang; A. Baig Babaei
Abstract
A field experiment was conducted focusing on the effects of biochar on quantity characteristics of Black Seed (Nigella sativa L.) under water deficit conditions. The experimental design was split plot factorial in a randomized complete block design with three replications. Three levels of irrigation ...
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A field experiment was conducted focusing on the effects of biochar on quantity characteristics of Black Seed (Nigella sativa L.) under water deficit conditions. The experimental design was split plot factorial in a randomized complete block design with three replications. Three levels of irrigation (I1: 100%, I2: 70% and I3: 40% of water irrigation requirement) were assigned as main plots and the combination of three levels of biochar (B1: 0, B2: 10 and B3:20 t.ha-1) and two levels of chemical fertilizers (F1: without and F2: with chemical fertilizer) were allocated as sub plots. Results were shown that seed number per plant and seed weight per plant significantly increased by 10 t.ha-1 biochar application compared with 20 t.ha-1. Chemical fertilizer significantly affected the yield components of black seed except 1000-seed weight. The interaction between biochar, chemical fertilizer and water requirements significantly affected the seed yield and biological yield. The result revealed that the application of 10 t.ha-1 biochar plus 70% water irrigation requirement and using chemical fertilizer (I2B2F2) produced the highest seed yield and biological yield (1365 and 5776 kg.ha-1, respectively). Application of biochar combined with chemical fertilizers could improve soil nutrient and water availability conditions and increased the yield of black seed.
M.B. Amiri; P. Rezvani Moghaddam; M. Jahan; M. Salehabadi; N. Naseri
Abstract
This research was aimed to investigate the effects of plant density and organic and chemical fertilizers on some phytochemical characteristics of Iranian ox-tongue (Echium amoenum Fisch. & Mey.). The study was conducted as a split plot experiment based on RCBD design with three replications, conducted ...
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This research was aimed to investigate the effects of plant density and organic and chemical fertilizers on some phytochemical characteristics of Iranian ox-tongue (Echium amoenum Fisch. & Mey.). The study was conducted as a split plot experiment based on RCBD design with three replications, conducted in 2011-2014, in Ferdowsi University of Mashhad, Iran. The main and sub plots included three plant densities (10, 5 and 3 plants per m2) and three types of organic fertilizers and one type of chemical fertilizer (compost, vermicompost, cow manure, nitrogen chemical fertilizer and control), respectively. The results showed that the highest antioxidant activity was obtained in a density of 10 plants per m2 (79 mg/ml) and the highest total phenols was observed in a density of 5 plants per m2 (51 mg GAE/g flower DW). Compost, vermicompost, cow manure and chemical fertilizer increased total phenols to 51, 35, 40 and 63%, respectively compared to control. Application of vermicompost and cow manure in a density of 3 plants per m2 increased total flavonoid up to 39 and 38%, respectively compared to control. The highest total anthocyanin was obtained in a density of 5 plants per m2. Vermicompost and cow manure increased the seed oil (10 and 13%), and seed protein content (34 and 13%), respectively compared to control. In general, according to the findings of this research, it seems that the use of eco-friendly inputs and determining the optimal density of Iranian ox-tongue could result in improving the quality and health of product and minimizing the damage caused by chemical inputs.
P. Rezvani Moghaddam; A. Ghani; M. Rahmati; S. Mohtashami
Abstract
In order to study the effects of different drying methods including oven, microwave and ambient (shade condition) on drying time, essential oil content, antioxidant activity and phenol compound of two populations of Tarragon (Artemisia dracunculus L.), two separate experiments were carried out on two ...
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In order to study the effects of different drying methods including oven, microwave and ambient (shade condition) on drying time, essential oil content, antioxidant activity and phenol compound of two populations of Tarragon (Artemisia dracunculus L.), two separate experiments were carried out on two populations (Mashhad and Nishabur). The experiment was performed in a completely randomized design with three replications and 13 drying treatments (oven temperatures: 40, 50, 60 and 70 °C, six microwave powers: 100, 180, 300, 450, 600 and 900 w, shade drying and combination of drying with microwave (600 and 900 w) and shade drying). In addition, a comparison was performed between fresh sample and the mentioned treatments. Results showed that moisture content and measured active substances were different between studied populations. In both experiments, the longest drying time (about 30 hours and 32 h for Mashhad and Nishabur population, respectively) and the shortest drying time (about 5 minutes) was obtained at ambient temperature and 900 w microwave power treatments, respectively. In both experiments, the highest essential oil content (2.27 and 3.2% for Mashhad and Nishabur population, respectively) was obtained from fresh samples and then ambient temperature and microwave 900 w treatments. Essential oil content was decreased by increasing drying temperature. Essential oil content was in an average in all combination treatments. The highest antioxidant activity (82.5 and 81.8% in Mashhad and Nishabur population, respectively) was obtained by fresh samples while the lowest amount was obtained for Mashhad (60.7%) and Nishabur (53%) populations in ambient temperature and in 40°C oven dry, respectively. Maximum phenol compound was recorded for Mashhad population (165 mg GA/g DW) in 600 w microwave power and Nishabur population (524/7 mg GA/g DW) in 900 w microwave power, respectively.