S. Hazrati; Z. Tahmasebi Sarvestani2; A.R. Sadeghi Bakhtoori
Abstract
Aloe barbadensis Miller. is one of the most economically important medicinal plants in many countries of the world. This investigation aimed at evaluating the effects of water stress and zeolite on growth, yield and chemical compositions of A. barbadensis. The study was conducted in the research greenhouse ...
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Aloe barbadensis Miller. is one of the most economically important medicinal plants in many countries of the world. This investigation aimed at evaluating the effects of water stress and zeolite on growth, yield and chemical compositions of A. barbadensis. The study was conducted in the research greenhouse of Faculty of Agriculture, Tarbiat Modares University. The plants were harvested 90, 180 and 270 days after imposing the treatments. Water deficit stress decreased growth, leaf fresh and gel fresh weight and increased biochemical compounds. The results showed that the greatest number of new leaves and pup were produced by the plants irrigated 20% and 40% FC with 8 g zeolite, respectively. Generally, the highest leaf fresh and gel fresh weight were observed 270 days after imposing the treatments when plants were irrigated after depleting 40% of the FC and amendment with 8 g zeolite (624.13 and 397.17 g), respectively. The water use efficiency increased with less water and more zeolite availability. The highest water use efficiency of leaf and gel was obtained from the plants irrigated after depleting 60% of field capacity and treated with 8 g zeolite. In addition, the results indicated that the maximum aloin concentration (23.48%) and proline accumulation (0.85 (mg [g FW]-1) were obtained 90 days after imposing the treatments when the plants were irrigated after depleting 80% and 60% of FC where no zeolite was applied, respectively. Irrigation after 80% depletion of FC without zeolite application resulted in the highest fructose and glucose content, respectively (234.71 and 79.83 mg g DW−1). In general, application of zeolite could alleviate water stress adverse effects, and improved plant growth and yield. Severe water stress decreased leaf yield and plant growth, while caused an increase in biochemical compounds.
A. Salehi; A. Ghalavand; F. Sefidkon; A. Asgharzade; K. Saeedi
Abstract
In order to study the effects of zeolite, bio and organic fertilizers on the growth, yield and yield components of German Chamomile (Matricaria chamomilla L.) in organic cultivation, an experiment was conducted at the research field of Tarbiat Modares University in 2005. The factors were PGPR inoculums ...
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In order to study the effects of zeolite, bio and organic fertilizers on the growth, yield and yield components of German Chamomile (Matricaria chamomilla L.) in organic cultivation, an experiment was conducted at the research field of Tarbiat Modares University in 2005. The factors were PGPR inoculums (inoculated and no inoculated), zeolite (0 and 9 ton/ha) and vermicompost (0, 5, 10 ton/ha). The experimental design was factorial in a randomized complete blocks design with twelve treatments and three replications. Mean comparison was carried out using Duncan’s multiple range test (at 5% level). Results showed that the highest value of flower yield (358.13), biological yield (1572.09), number of flower per plant (61.09), flower diameter (21.84) and height (45.51) were obtained with PGPR inoculums. Zeolite also showed significant effects on mentioned traits except flower diameter and harvest index. With increasing of vermicompost levels, all traits were increased as the highest value of flower yield (434.22), biological yield (1814.30), number of flower per plant (72.71), flower diameter (22.35) and height (47.91) were obtained with application of 10 ton/ha vermicompost. In addition, there were positive and synergistic interactions between vermicompost combined with PGPR and vermicompost combined with zeolite on dry flower yield, as the highest flower yield was obtained in v3b2 and v3z2 treatments with 448.73 and 448.7kg/ha, respectively.
Kh. Karimzadeh; F. Sefidkon; N. Majnoon Hosseini; S.A. Peighambari
Abstract
To study the effect of different levels of soil moisture, zeolite and biofertilizers on physiological characteristics, yield and essential oil of medicinal plant Dracocephalum moldavica L., this research was performed in 2010 at Tehran university research greenhouse. For this purpose, a factorial split-plot ...
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To study the effect of different levels of soil moisture, zeolite and biofertilizers on physiological characteristics, yield and essential oil of medicinal plant Dracocephalum moldavica L., this research was performed in 2010 at Tehran university research greenhouse. For this purpose, a factorial split-plot experiment in RCBD with 4 replications was used. In this study the main plots included different soil moisture levels (90%, 60% and 30 % FC) and subplots consisted of two levels of zeolite (zero, 8gr 4kg-1 soil) along with four levels of biofertilizers (without biofertilizer, nitroxin, biphosphorous, nitroxin+biphosphorous). Results showed that the highest amount of total, a and b chlorophylls, relative water content and yield of essential oil were obtained through %90 FC, but the highest amount of solution carbohydrates, proline and percentage of essential oil were obtained through %30 FC. The maximum amount of studied physiological traits as essential oil percentage and essential oil yield were obtained from application of nitroxin+biophosphorous. Interaction effects of soil moisture, zeolite and biofertilizers showed significant differences among different treatments on amount of a, b and total chlorophyll, relative water content, percentage and yield of essential oil. The maximum amount of oil yields were obtained from zeolite application and combination of nitroxin+biphosphorous and 60% FC and treatment of no consumption of zeolite and combination of nitroxin+biphosphorous with 90% FC. It could be concluded that moderate drought stress (60% FC) with application of zeolite and combination of nitroxin+biphosphorous is beneficial for Dragonhead essential oil yield.
Sh. Khalesro; A. Ghalavand; F. Sefidkon; A. Asgharzadeh
Abstract
Anise (Pimpinella anisum L.) is one of the aromatic and medicinal plants. Anethol is the most important component of its essential oil used in medicinal and food industries. The aim of this experiment was to determine the effect of vermicompost levels (0, 5 and 10 t.ha-1), mixture of Azotobacter, Azospirillum ...
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Anise (Pimpinella anisum L.) is one of the aromatic and medicinal plants. Anethol is the most important component of its essential oil used in medicinal and food industries. The aim of this experiment was to determine the effect of vermicompost levels (0, 5 and 10 t.ha-1), mixture of Azotobacter, Azospirillum and Pseudomonas (inoculation and not-inoculation) and zeolite (0 and 4.5 t.ha-1) on essential oil content, composition and macro element contents of Pimpinella anisum. Experimental design was randomized complete blocks with factorial arrangement. Field experiment was conducted at Sanandaj Agriculture Research Station, in 2009. The results showed that vermicompost application improved essential oil content and yield, anethol and methyl chavicol percentage, nitrogen, phosphorus, and potassium content. Inoculating seeds with PGPR led to significant increment in all of the mentioned characters except for methyl cavicol percentage and potassium concentration. Zeolite application had significant effect on essential oil content, oil yield and anethol percentage but no significant effect on the other characters. The most favorable interaction treatment for essential oil production and phosphorus percentage was the PGPR inoculation combined with the highest level of vermicompost.
A. Salehi; A. Ghalavand; F. Sefidkon; A. Asgharzade
Abstract
In order to study the effects of zeolite, bio and organic fertilizers on N, P, K concentration, essential oil content and yield in organic cultivation of German Chamomile (Matricaria chamomilla), a factorial experiment in randomized complete blocks design with twelve treatments and three replications ...
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In order to study the effects of zeolite, bio and organic fertilizers on N, P, K concentration, essential oil content and yield in organic cultivation of German Chamomile (Matricaria chamomilla), a factorial experiment in randomized complete blocks design with twelve treatments and three replications was conducted in the faculty of agriculture, Tarbiat Modares University, 2005. The factors were PGPR inoculums (inoculated and no inoculated), zeolite (0 and 9 tons/ha) and vermicompost (0, 5, 10 tons/ha). Results showed that the highest concentration of N, P and K in plant, essential oil content and yield were obtained with PGPR inoculums. Zeolite also showed significant effects on the mentioned traits except P concentration. With application of zeolite 9 ton/ha, essential oil content, essential oil yield, N and K concentration were increased. Essential oil content, essential oil yield, N, P and K concentration were also increased with increasing of vermicompost levels as the highest values were obtained with application of 10 ton/ha vermicompost. There was positive and synergistic interaction between PGPR inoculums and vermicompost on N concentration as the highest and lowest N concentration percentage in herb were obtained in treatments of V3B2 (1.48) and V1B1 (1.12), respectively. According to the results, it appears that application of 10 tons vermicompost, inoculation with PGPR and 9 tons zeolite was the best treatment in production of German chamomile essential oil yield in organic system.
