Naser Nasrolahzadehasl; Mojtaba Delshad; Abdolkarim Kashi
Abstract
Introduction: Cucumis sativus L. is one of the most eminent and consuming vegetables which is widely cultivated in the Middle East. Using the controlled and greenhouse cultivation is one of the most appropriate methods to increase production per unit area. In this method, controlling the effective factors ...
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Introduction: Cucumis sativus L. is one of the most eminent and consuming vegetables which is widely cultivated in the Middle East. Using the controlled and greenhouse cultivation is one of the most appropriate methods to increase production per unit area. In this method, controlling the effective factors of production such as plant nutrition is the important factor to achieve high performance. Besides the accuracy applied in nutritional regulation of plant roots (both in soil and hypothermic environments), in many cases, foliar nutrition is considered by breeder of greenhouse productions. Foliar nutrition is more effective on young leaves, and deficiency of macro and micro nutrients can be removed by this factor. Khassib is one of the most important cultivar of greenhouse cucumber which is widely cultivated in Iran. The present study was conducted to evaluate the effect of foliar application on greenhouse cucumber.
Materials and Methods: The experiment was performed on greenhouse cucumber (cv. Khassib) for five months (from March 2007 to July 2008) in Ziba Dasht Technical Instruction Center which is located near Karaj, Iran. For this reason the experiment was conducted based on split-split-plot design with three replications. Eight experimental treatments were applied for foliar application including U1C1B1: urea + calcium nitrate +boric acid, U1C1B0: urea + calcium nitrate, U1C0B1: urea + boric acid, U1C0B0: urea, U0C1B1: calcium nitrate + boric acid, U0C1B0: calcium nitrate, U0C0B1: boric acid, U0C0B0: control. The effects of urea, calcium nitrate and boric acid in concentrations 3, 10 and 0.5 (gL-1) respectively on qualitative and quantitative characteristics of greenhouse cucumber, including fruit yield, yield of first class fruit, number of fruits, percentage of first class fruit, fruits T.S.S, plant length, percentage of leaf dry matter, and leaf weight ratio were studied.
Results and Discussion: The results showed that calcium nitrate had a significant effect on fruit yield at 5% probability level. Foliar application of calcium nitrate with concentration of 10 gL-1resulted in an increase of yield so that the average of fruit yield for sprayed plants was 3917.9 g per plant, while this value in control plants was 3576.5 g. Boric acid with concentration of 0.5 gL-1 had a remarkable effect on fruit yield at 5% probability level that enhanced the average of yield from 3591.6 to 3902.8 g per plant. The interaction of U×C×B treatment on fruit yield at 1% probability level was significant, while this value was not found among other treatments. Foliar application with calcium nitrate results in an increase of yield and production in young and growing fruits. The augmentation of yield in treatment U1C0B0 due to the facts that pure urea and calcium nitrate have 46% and 16% nitrogen, respectively, i.e., extra nitrogen causes toxicity and branching instead of fruiting. Among three-way interactions, U×C×B statistically had a remarkable impact on the yield of first class fruit at 1% probability level and also the maximum and minimum of this value belonged to U1C0B0 and control, respectively. Only U×C×B had a remarkable impact on plant length among all interactions. Generally, the growth of cucumber depends on genetic features, temperature and soil productivity. The highest level of leaf area index was for calcium nitrate that indicated the significant effect at 5 % probability level with the mean of 15.89. When we compare the foliar application treatments with fosamko, it can be found that the spraying treatments affected leaf dry matter significantly at 1% and 5% probability levels, while this value was not found for control treatments. However, there was no significant difference between using and not using nutrition compared to fosamko on yield.
Conclusion: According to the findings of the present study the following factors can be concluded: a) Among the main effects, calcium nitrate played the eminent role on most traits, after that boric acid and finally urea carried this role; b) Among two-way interaction, only U1B1, as foliar application, significantly affected the yield of grade 1 fruit; c) Among three-way interactions, only U1C0B0, as foliar application, significantly affected the yield of grade 1 fruit, total fruit and the number of fruit; d) There was no a significant change on qualitative features of cucumber using nutrition compared to fosamko. Therefore, cucumber production can be performed by cheaper methods with no change in qualitative characteristics. Finally, due to the fact that cucumber is one of the most important vegetables in Iran, it is suggested that various studies with different fertilizers will be conducted on cucumber.
Davood Sadeghzadeh Ahari; Mohammad Reza Hassandokht; Abdolkarim Kashi; Ahmad Amri
Abstract
Introduction: Fenugreek (Trigonella foneum-graecum L.) has been cultivated in vegetable farms at the most parts of Iran. It is an annual crop belonging to the Leguminosae family. It originated from west Asia and Iran and cultivated at mostly in European, Asian and African countries, presently. With distinguished ...
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Introduction: Fenugreek (Trigonella foneum-graecum L.) has been cultivated in vegetable farms at the most parts of Iran. It is an annual crop belonging to the Leguminosae family. It originated from west Asia and Iran and cultivated at mostly in European, Asian and African countries, presently. With distinguished of feeding and medicinal values, low needs to soil conditions and its width adaptability to cultivation in different regions, the range of fenugreek cultivation areas have been extended from America to India. In most parts of Iran there is limiting possibilities for cultivation of horticultural and agricultural crops for the reason of limiting water harvesting and unsuitable rainfall distributions. There is no doubt that introduction of new crops for such conditions could increase variation of crops production and stability of farming systems. Plants landraces have been created in thousands of cultivation years under different climatologically and local cropping systems. They are evolved by natural and artificial selection under environmental conditions where they were grown and there have accumulative adaptive genes for tolerance to biotic and abiotic stresses and are the most precious materials in starting of breeding programs. Germination phase is the most important period that guaranties the growth and establishments of crops. One of the basic activators of germination starters is water and limiting of it (drought) is the most important retardant of seed growth during germination period under field condition. Fast germination and emergence of seedling from soil and high preliminary growth rate has been known for one of the drought escape mechanisms for most crops such as chickpea, lentil and bean. In breeding programs of crops, using in vitro method is one of the most used methods in germplasm selection for drought tolerance. This study carried out under laboratory condition in order to evaluate some Iranian fenugreek landraces reactions to drought stress.
Materials and Methods: In order to evaluate the Iranian fenugreek landraces reactions to drought stress induced by Poly Ethylene Glycol 6000, twenty fenugreek landraces originated from different parts of Iran were used in this study. The experiment was conducted at Maragheh experimental station of the Dry land Agricultural Research Institute (DARI) under laboratory condition, with a factorial experiment based on randomized complete blocks design and three replications. The stress levels were zero (di-ionized water),-2, -4,-6 and -8 bar. Fifteen normal and health seeds from each landraces were cultivated in petridishes and stayed under fixed temperature (25±1 degree of centigrade), 12 hour day/night for fourteen days. Seedling characteristics (seed germination percentage, root and stem lengths, ratio of stem length to root length, root and stem fresh weights, ratio of stem fresh weight to root fresh weight, root and stem dry weights) were noted. Data were analyzed by MSTAT-C software and comparisons of noted traits means done by Duncan’s Multiple Range Test at 5% probability level. In order to distinguish tolerant and susceptible genotypes, landraces ranked by using of Sarmadnia et al.,(1988) and Kafi et al.(2005) methods, and with using of the main traits such as seed germination percentage, root and stem lengths, root and stem fresh weights, root and stem dry weights.
Results and Discussion: Results showed that, drought stress levels had significantly affected on all study traits (seed germination percentage, root and stem lengths, ratio of stem length to root length, root and stem fresh weights, ratio of stem fresh weight to root fresh weight, root and stem dry weights). The differences among landraces were highly significant in all traits except in primary root dry weight. The most visible differences among the genotypes in germination percentage monitored at less than -4 bars. Based on ranking of genotypes with seven main studied traits (seed germination percentage, root and stem lengths, root and stem fresh weights, root and stem dry weights), Kashan and Neyshaboor were the most tolerant and Rey and Khash were the most susceptible landraces among the studied genotypes at germination and seedling growth stages.
Conclusion: It could be concluded that, there are differences among the Iranian fenugreek landraces in case of reaction to drought stress at germination and seedling growth stages that shows suitable diversity among them. Moreover, using from less than -4 bar drought stress levels recommended for screening and selection of drought tolerance fenugreek genotypes. Also, it is recommended attention to Iranian fenugreek landraces and using the hidden potentials of them same as drought tolerance and resistance. It is suggested protection of them as a precious genetically resources in gene bank.
Fereshteh Makenali; Abdolkarim Kashi; Jamshid Hekmati
Abstract
Introduction: Oystermush rooms contain a wide enzymatic system to catalyze lignocellu lose and naturally live in organs of plants that are protein-rich. Agricultural and industrial wastes contain organic cellulosic materials such as cereal straw, sawdust and leaves that are suitable substrate for growth ...
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Introduction: Oystermush rooms contain a wide enzymatic system to catalyze lignocellu lose and naturally live in organs of plants that are protein-rich. Agricultural and industrial wastes contain organic cellulosic materials such as cereal straw, sawdust and leaves that are suitable substrate for growth of oyster mushrooms. Previous studies have shown that dietary supplements increase growth indices of oyster mushrooms.
Materials and Methods: Spawn of Florida oyster mushrooms wereprovided experimentally on grains of wheat. The experiment was conducted in the laboratory of the Agricultural College of Mehr Shar, Islamic Azad University of Karaj, Iran in 2011. Two factors were considered in this study substrate (A) and dietary supplements(B). Sugarcane bag asse (A1) and wheat straw (A2) were shed into polyethylene bags after they were pasteurized by boiling vapor and spawning was conducted according to wet weight of straw bags which was 4 kg. Supplements of Nitrogen werecottonseed powder, 2%soya flour, and urea0.5% that were added to substrate according to dry weight of substrate (1334 gr). Mushrooms were transferred to the laboratory after cropping in order to measure dry and wet weight. They were packed and dried in the oven during 24-72 hours at 60-70ºC. In order to estimate the biological efficiency, the produced crop was divided by weight consumed substrate that was multiplied by 100. A completely randomized factorial statistical experiment according to completely randomized design with 16 treatments and three replications was conducted. MSTAT soft ware was used for statistical analysis and the Dunkan test was used for comparing mean data with probability of 5%.Finally figures were drown using Excel.
Results and Discussion: In wheat straw substrate mushrooms were produced with high biological efficiency and yield, because compared to sugarcane bagasse, wheat straw needs a shorter period for fermentation, contains more nutrients, catalyzed faster than sugarcane bagasse soit provided mycelium with the nutrient amount of biological efficiency that increased byadding dietary supplements there for ethe yield was higher than control. Temperature of substrate increased by combining urea, cotton seed powder and soya flour nitrogen supplements, and that large amount of nitrogen were released into the environment and high temperature substrate.
So expansion of mycelium decreased and mushrooms with low biological efficiency and low yield were produced. The highest biological efficiency (23.03 %) and the highest yield (4/921 gr) were obtained through wheat straw that fed by cotton seed powder + soya flour (A2B6).The lowest biological efficiency (10.48 %) and the lowest yield (419 gr) were from control treatment (A1). Frequency of nitrogen in cotton seed powder is one of the most important reasons of increasing biological efficiency and yield. Another efficiency biologic factor was used in cultivation of fungi was C/N ratio, since nitrogen is a necessary factor for the activity of ligninoletic enzyme that is produced by basidiomycets. Cultivated fungi on wheat straw were wetter than mushrooms cultivated on sugarcane bagasse, because wheat straw has 10-15%water and sugarcane bagasse has 9% moisture. Wheat straw with cotton seed + powder soya flour (A2B6) and control treatment (A1) had the highest moisture (92.26%). Byaddition of dietary supplements in the surface of enriched substrate, fruit body density had increased in control, so mushrooms were less exposed to the air flow, but the combination of nitrogen supplements, the arrival of more nitrogen andsubstrate heat increased and that the mushrooms had less humid. In wheat straw substrate more number of body fruits was obtained in comparison with sugarcane bagasse substrate..418 numbers of body fruits obtained from wheat straw by cotton seed powder + soya flour (A2B6) and 163 mushrooms were obtained from control treatment (A1). Absorbable chemical compounds in the medium were used faster and the number of mushrooms in wheat straw substrate with cotton seed powder and soya flour (A2B6) increased while combination of supplements and heat due to entrance of nitrogen caused death of mycelium and decreasing number of mushrooms. The results analysis of variance, substrate effect and mean compare supplement effect was significant at 1% on biological efficiency. Yield, moisture, number of body fruit, mean interaction effect of substrate and supplement was significant at 0.05on biological efficiency, yield and moisture but mean interaction effect of substrate and supplement on the number of body fruit was significant at 1%.
Conclusion: Medium has a deep impact on growth indices of Florida oyster mushrooms in such a way that obtained mushrooms from rich mediums had higher growth indices than control. The impact of dietary supplements on growth indices is different and by adding an appropriate amount of dietary supplements to medium increases growth indices.
Nariman Rashidi; Isa Arji; Mohammad Gerdakaneh; Abdolkarim Kashi
Abstract
In order to investigate effect of organic manure and super absorbent on physiological and biochemical traits of potato (Solanum tubersum, cv Marfona), a split plot experiment was conducted as randomized complete block design with three replications at Research Farm, Agriculture College, University of ...
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In order to investigate effect of organic manure and super absorbent on physiological and biochemical traits of potato (Solanum tubersum, cv Marfona), a split plot experiment was conducted as randomized complete block design with three replications at Research Farm, Agriculture College, University of Razi in 2010. Main factor included two levels of super absorbent A200 (0 and 70 Kg/ha,) and split plot included nine levels (0, chemical fertilizer (according to soil test), granule chicken manure (1000 kg/ ha), common chicken manure (12 ton/ha), soil mix (1000 kg/ha), cow manure (20 ton/ha), vermicompost (20 ton/ha), compost (20 ton/ha) and tea compost (soaking tubers and spraying at four times). Investigating physiological traits such as leaf chlorophyll index, chlorophyll florescence and stomata conductance showed that only leaf chlorophyll index was affected by superabsorbent (P < 0.01) and organic manure (P < 0.05), while stomata conductance wad significant under it’s interaction effect at (P < 0.05). Quality and biochemical traits show that phosphorous amount of tuber was significant in superabsorbent treatment in compare to control. Crude oil percentage, protein, fiber, starch, sugar, nitrogen, phosphorous and potassium content were not affected by organic manure. The highest amount of oil and fiber were obtained under compost and cow manure respectively. Sugar and nitrogen content were high under cow manure treatment. The highest amount of potassium and phosphorous content were belonging to chicken and Khakparvar manure respectively.
Abdolsattar Darabi; Mesbah Babalar; Abdolkarim Kashi; Mohsen Khodadadi
Abstract
Abstract
An experiment was conducted to study growth analysis and evaluation of change in simple non- structural carbohydrates (sucrose, glucose and fructose) during bulb formation of Ghermez Azarshahr , Zargan, Safid naishaboor and Safid Qom cultivars in randomized complete block design containing ...
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Abstract
An experiment was conducted to study growth analysis and evaluation of change in simple non- structural carbohydrates (sucrose, glucose and fructose) during bulb formation of Ghermez Azarshahr , Zargan, Safid naishaboor and Safid Qom cultivars in randomized complete block design containing three replications. Seeds were sown in nursery in early February and seedlings were transplanted in early May. During initiation of bulbing carbohydrates accumulated in leaf bases. Before and after bulb formation (about 20 days after bulb formation) the most simple non-structural carbohydrates content was found in Safid Qom cultivar. The maximum and minimum increasing percent of simple non- structural carbohydrates components belong to glucose and sucrose respectively. The results of growth analysis indicated that the period of slow growth had been about 75 days after emergence (for all studied cultivars) and then the period of rapid growth of leaf has begun. The bulb growth rate of Zargan cultivar during the most parts of bulb development stage was higher than other culitivars, due to this reason and earliest date of bulbing, yield of mentioned cultivar was higher as compared with other cultivars. A high significant positive correlation ( r = 48% ) was found between relative growth rate and net assimilation rate at 1% level. Zargan cultivar produced the highest total and marketable yield, so that mentioned cultivar is recommended for Karaj region.
Key words : Onion, Yield, Carbohydrate, Growth analysis, Net assimilation rate
Maryam Haghighi; Mohsen Kafi; Toktam Taghavi; Abdolkarim Kashi; Gholamreza Savaghebi
Abstract
Abstract
study on photosynthetic and enzym Activity changes in lettuce under cadmium stress has been done in greenhouse. Of zhejang university in Chine The experimental design was a CRD factorial design organized in hydroponic system with 7 replications. Cadmium was added to nutrient solution in CdCl2 ...
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Abstract
study on photosynthetic and enzym Activity changes in lettuce under cadmium stress has been done in greenhouse. Of zhejang university in Chine The experimental design was a CRD factorial design organized in hydroponic system with 7 replications. Cadmium was added to nutrient solution in CdCl2 in three concentrations (0, 2, 4 mg/l). Stomatal photosynthetic factors (transpiration, stomatal and mesophyl conductance, internal CO2 concentration), enzyme activity changes (Proxidase and Superoxid Dismutase),chlorophyll, leaf length and number, biomass, transfer coefficient, was measured. Results showed that peroxidase and superoxide dismutase increased but biomass, photosynthesis, transpiration, stomatal conductance, internal CO2 concentration and leaf length was decreased as cadmium increased in nutrient solution, transfer coefficient was increased also.
Key Words: Photosynthesis, Chlorophyll, Stomata, Antioxidant, ,Cadmium, Lettuce
