Abdolhamid Mohebi
Abstract
Increasing the efficiency of water use is one of the main topics of sustainable agriculture in arid and semi-arid. The use of some materials such as superabsorbent polymers increase water storage in the soil and thus reduces the water use. Increase water storage in the soil to reduce the effects of drought ...
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Increasing the efficiency of water use is one of the main topics of sustainable agriculture in arid and semi-arid. The use of some materials such as superabsorbent polymers increase water storage in the soil and thus reduces the water use. Increase water storage in the soil to reduce the effects of drought and saline soil. In order to evaluate the effect of super absorbent polymer on survival and growth characteristics of palm, an experiment was carried out in split plot based on Randomized Completely Block Design (RCBD) with three replications at date palm and tropical fruit research center in Ahwaz, during 2011-2012. Experiment comprised a following treatment combination irrigation based on 60, 80 and 100 percent class A pan in main plots, superabsorbent in four rates (0, 40, 80 and 120 g for each offshoot) in subplot. The results showed that water stress and superabsorbent did not significant effect on the surviving. The water use 100 percent with 40 grams and 80 percent of water use with 120 grams of superabsorbent produced the highest and lowest number of leaves prospectively. The lowest number of leaves on the provision of treatment was. The most and lowest trunk perimeter produced in the treatment of water use 100 percent without superabsorbent and 80 percent of water use with 120 grams of superabsorbent, respectively. The water use 100 percent with 120 grams and 60 percent of water use without superabsorbent caused the maximum and minimum plant height, respectively.
Atena Gholipur; Mehdi Ghajar sepanlu; Mohammad ali Bahmaniar
Abstract
In order to study the effect of municipal solid waste application with or without chemical fertilizer on the concentration of heavy metals in soil and rice plant, an experiment was conducted with randomized complete block design in three replications and fourteen treatments in Research Station of Sari ...
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In order to study the effect of municipal solid waste application with or without chemical fertilizer on the concentration of heavy metals in soil and rice plant, an experiment was conducted with randomized complete block design in three replications and fourteen treatments in Research Station of Sari Agricultural and Natural Resources University in 2009 and 2010. The treatments included control treatment, chemical fertilizer, 15, 30 and 45 ton/ha municipal solid waste compost and chemical fertilizer at three levels (25, 50 and 75 percent). Results indicated that applying compost for two years showed no significant effect on any of the available heavy metals in soil. However, significant increases were observed for Lead (Pb2+) in root, and Pb2+, Cd2+, Nicle and Cobalt in shoot and Cadmium (Cd2+) in grain. Meanwhile, the highest amount of heavy metals was concentrated in 45 t/ha of municipal solid waste + 75 percent chemical fertilizer treatment. Thus, using municipal solid waste compost, the amount of the heavy metals increased in soil and rice plant but their concentrations were below their toxicity limit.
Seyed Majid Mousavi; zahra Ahmadabadi
Abstract
To compare potential of two organic materials including sewage sludge (SS) and municipal solid wastecompost (MSW) on micronutrients entry to soil, a research was conducted as split-plot arrangement basedon randomized complete block design with three replications in research field of Sari AgriculturalUniversity. ...
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To compare potential of two organic materials including sewage sludge (SS) and municipal solid wastecompost (MSW) on micronutrients entry to soil, a research was conducted as split-plot arrangement basedon randomized complete block design with three replications in research field of Sari AgriculturalUniversity. Main-plot (fertilizer treatments) included 20 and 40 ton/ha SS, 20 and 40 ton/ha SS + 50%chemical fertilizer (CF), 20 and 40 ton/ha MSW, 20 and 40 ton/ha MSW + 1/2 CF, CF and control. Subplot(years of application) comprised 3 treatments (1, 2 and 3 times of application). Results showed thatboth fertilizer treatments and application period treatments enhanced accumulation of micronutrients insoil significantly so that SS treatments had more influence compared to MSW treatments. The highesttotal and available Fe and Zn, total Mn and Cu were obtained in SS treatments. While, the most availableMn and available Cu was observed in 3 continuous years application of enriched 40 ton MSW and 20 tonMSW with CF, respectively.
Ali Asadi Kangarshahi; Gholam Reza Savaghebi; Mahmoud Samar; Mohsen Farahbakhsh
Abstract
Changes in chlorophyll florescence is one of the physiological responses of plants to waterlogging stress. Due to easily measured in field and its inexpensive and non-destructive characteristics, it is one of the best ways to assess different genotypes tolerance to stresses. In this experiment, trends ...
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Changes in chlorophyll florescence is one of the physiological responses of plants to waterlogging stress. Due to easily measured in field and its inexpensive and non-destructive characteristics, it is one of the best ways to assess different genotypes tolerance to stresses. In this experiment, trends of chlorophyll fluorescence index (Fv/Fm) of ‘Satsuma’ mandarin (Citrus unshiu) on seven rootstocks (sour orange, Swingle citromello, Carizo citrange, Troyer citrange, C-35, Smooth flat sevil and Gou tou) were determined in some soils of East Mazandaran. The experiment was conducted as factorial in a randomized complete block design. The results showed that effect of different factors on changes of chlorophyll fluorescence were significant. Soils 7 and 1 had the highest and lowest index, respectively. The effect of different rootstocks on fluorescence index showed that with increasing duration of waterlogging, this index drops increasingly compared to the beginning of waterlogging. Gou tou and Sour orange had the highest and lowest fluorescence during waterlogging, and Swingle, Carizo, Troyer, Smooth and C-35 placed after Gou tou, respectively. In addition, tolerance of rootstocks to waterlogging was different in various soils of this area.
Seyed Majid Mousavi; Mohammad Ali Bahmanyar; Zahra Ahmadabadi
Abstract
In order to investigate distribution status of heavy metals in cropping systems of water logging and dry farming, an experiment was conducted as split-plot arrangement based on randomized complete block design with three replications in research field of Sari Agricultural Science and Natural Resources ...
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In order to investigate distribution status of heavy metals in cropping systems of water logging and dry farming, an experiment was conducted as split-plot arrangement based on randomized complete block design with three replications in research field of Sari Agricultural Science and Natural Resources University. A paddy-soil considered for water logging system and the planted field with vegetables considered for dry farming system. Main plot (fertilizer treatments added to soil) included five treatments: 20 and 40 ton.ha-1 compost, 20 and 40 ton.ha-1 sewage sludge and control. Also, sub factor (application years) consisted three treatments comprised: one, two and three years fertilization. The results showed that in water logging system sewage sludge treatments had more influence on heavy metals accumulation in soil while, compost treatments had more influence than sewage sludge treatments in dry farming system. Also, in paddy soil the enhancement percent of available form compared to control treatment was much more than dry farming system.
Behzad Azadegan; Reza Amiri
Volume 12, Issue 1 , May 2010, , Pages 1-9
Abstract
The objective of this research was to study the effect of fertilizer management on the yield increase of crop plants. The extra amounts of applied fertilizers were studied by comparison between allocated, applied and recommended fertilizers’ amounts for: wheat, barley, corn and alfalfa with four ...
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The objective of this research was to study the effect of fertilizer management on the yield increase of crop plants. The extra amounts of applied fertilizers were studied by comparison between allocated, applied and recommended fertilizers’ amounts for: wheat, barley, corn and alfalfa with four replicates and the other data was gathered via questionnaires. Soil analysis of phosphorus, potassium and nitrogen amounts was performed in 20 fields and analysis of data was conducted base on complete randomized block design. Comparison of the averages was showed that there were significant differences between the amounts of allocated, applied and recommended fertilizers (P? 0.05). The average amounts of extra applied and extra distributed fertilizers were 382.9 and 150.6 Kg.ha-1 more than the recommended amounts, respectively. However, there was no significance increase in yield. 12 and 28% of farmers used the fertilizers in the basis of recommended and allocated, respectively and 60% of them used more than recommended amounts. Excess fertilizer application due to improper management causes reduction of soil and water quality.