Unsustainable withdrawal of agricultural water resources in the province of Kerman has caused an annual average of one-meter drop in ground watertable. Drop in groundwater levels, in addition to decreasing water resources, has caused their gradual salinization. Thus, it is necessary to carry out research to find the ways for increasing water use productivity (WUP) and new guidelines to use saline water. This research was conducted in randomized complete block design, consisting of two types of irrigation water (normal and magnetic saline water with a salinity of about 19 dS/m) and two amounts of irrigation water (85% and 100% of the water requirements of pistachio trees). Treatments were compared with a mixture of non-saline and saline water treatment as a control (with a salinity of 6.5 dS/m). Irrigation was done every 30 days, based on the irrigation frequency of the experimental plots before the project. The results showed that, in most cases, there was no significant difference (p<0.05) in the average growth characteristics and qualitative and quantitative characteristics of the yield in different treatments of saline water (both magnetic and non-magnetic water). In certain cases where the difference was significant, there was no clear trend. In all cases, treatment of mixed non-saline and saline water compared to non-magnetic and magnetic saline water treatments was significantly (p<0.05) better. Overall, in comparison with the control, the use of saline water (in both normal and magnetic treatment), caused decrease in leaf area about 20 cm2, 10% reduction in reproductive bud formation, reduced length and diameter of branches 5 cm and 1.5 cm, respectively, decreased dry weight per tree by 0.5 kg, increased blanking by7%, decreased splitting by10%, and increased 1.5 units in number of nut in ounce. Also, the use of saline water reduced the yield by 120 g dry weight per cubic meter of applied water (WUP). There wasn't significant difference between treatments for soil nutrient concentrations. Magnetic water had no effect on the improvement of soil salinity and sodium adsorption ratio. In all treatments in both non-magnetic and magnetic water, the final infiltration rate of water in the soil at the end of the second year, was reduced up to 31.6%, while it did not change in the control treatment. Permeability reduction in treatment with 100 percent water requirement was more compared to treatments with 85% water requirement. Seemingly, increase in the amount of irrigation water led to more sodium entry into the soil and, eventuall,y infiltration rate was reduced. Thus, the results showed no positive effect in the magnetic water on reducing the negative effects of salt water on the pistachio trees and soil. It seems that the effect of magnetic water on perennial plants requires longer studies (5-10 years old).
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- خوشروش، م و کیانی، ع. 1394. اثر آب شور مغناطیسیشده بر نفوذپذیری و هدایت الکتریکی بافتهای مختلف خاک. نشریه آبیاری و زهکشی ایران. شماره 4، جلد 9، صفحات 654-646.
- رنجبر، غ. روستا، م. ج و چراغی، س. ع. م. 1391. بررسی اثر آب مغناطیسی بر شاخصهای رشد گندم در شرایط شور. مجله پژوهش آب در کشاورزی. جلد 26، شماره 3، صفحات 274-263.
- زنگنه یوسفآبادی، ا. بهزاد، م و برومندنسب، س. 1391. تأثیر استفاده از آب مغناطیسی بر میزان آبشویی کاتیونها و آنیونهای خاک شور در شرایط آزمایشگاهی. نشریه آبوخاک (علوم و صنایع کشاورزی)، جلد 26، شماره 3، صفحات 689-680.
- عالمی، محمدحسن. 1371. طراحی دستگاههای آبیاری. نشر دانش و فن. 384 صفحه.
- فرشی، ع. ا. شریعتی، م. ر. جارالهی، ر. قائمی، م. ر. شهابی فر، م و تولایی، م. م. 1376. برآورد آب موردنیاز گیاهان عمده زراعی و باغی، جلد دوم، گیاهان باغی- موسسه پژوهشهای خاک و آب کشور. نشر آموزش کشاورزی، 630 صفحه.
- فیضی، ح. رضوانی، م. پ. صحابی، ح و امیر مرادی، ش. 1391. تحریک جوانهزنی بذر و ریشه گیاهچه گوجهفرنگی با استفاده از میدان مغناطیسی و خیساندن بذر. نشریه علوم باغبانی (علوم و صنایع کشاورزی)، دانشگاه فردوسی مشهد. جلد 26، شماره 3، صفحات 349-343.
- فیضی، ح. رضوانی، م. پ. کوچکی، ع. شاهطهماسبی، ن و فتوت، ا. 1390. تأثیر شدت و زمانهای مختلف میدان مغناطیسی بر رفتار جوانهزنی و رشد گیاهچه گندم (.Triticum aestivum L). نشریه بومشناسی کشاورزی، دانشگاه فردوسی مشهد. جلد 3، شماره 4، صفحات 490-482.
- Algarra, R. M., Zamora, L. L., Fos, G. A., and López, P. A. 2008. Magnetized Water: Science or Fraud? Journal of Chemical Education, 85(10), 1416.
- Alimi, F., Tlili, M. M., Amor, M. B., Maurin, G., and Gabrielli, C. 2009. Effect of magnetic water treatment on calcium carbonate precipitation: Influence of the pipe material. Chemical Engineering and Processing: Process Intensification, 48(8):1327-1332.
- Bogatin, J., Bondarenko, N. P., Gak, E. Z., Rokhinson, E. E., and Ananyev, I. P. 1999. Magnetic treatment of irrigation water: Experimental results and application conditions. Environmental science and Technology, 33(8):1280-1285.
- Danilov, V., Bas¸, T., Eltez, M. and Rizakulyeva, A. 1994. Artificial magnetic field effects on yield and quality of tomatoes. Acta Hortic. 366:279–285.
- Esitken, A. and Turan, M. 2004. Alternating magnetic field effects on yield and plant nutrient element composition of strawberry (Fragaria x ananassa cv. camarosa). Acta Agric. Scand, Sect. B, Soil Plant Sci. 54:135–139
- Fathi, A., Mohamed, T., Claude, G., Maurin, G., and Mohamed, B. A. 2006. Effect of a magnetic water treatment on homogeneous and heterogeneous precipitation of calcium carbonate. Water Research, 40(10):1941-1950.
- Gabrielli, C., Jaouhari, R., Maurin, G., and Keddam, M. 2001. Magnetic water treatment for scale prevention. Water Research, 35(13):3249-3259.
- Hozayn, M., and Qados, A. A. 2010a. Irrigation with magnetized water enhances growth, chemical constituent and yield of chickpea (Cicer arietinum L.). Agriculture and Biology Journal of North America, 1(4):671-676.
- Hozayn, M., and Qados, A. A. 2010b. Magnetic water application for improving wheat (Triticum aestivum L.) crop production. Agriculture and Biology Journal of North America, 1(4): 677-682.
- Knez, S., and Pohar, C. 2005. The magnetic field influence on the polymorph composition of CaCO3 precipitated from carbonized aqueous solutions. Journal of Colloid and Interface Science, 281(2):377-388.
- Kobe, S., Dražić, G., McGuiness, P. J., and Stražišar, J. 2001. The influence of the magnetic field on the crystallisation form of calcium carbonate and the testing of a magnetic water-treatment device. Journal of Magnetism and Magnetic Materials, 236(1):71-76.
- Lai, J., & Ren, L. 2007. Assessing the size dependency of measured hydraulic conductivity using double-ring infiltrometers and numerical simulation. Soil Science Society of America Journal, 71(6), 1667-1675.
- Qados, A. A., and Hozayn, M. 2010. Magnetic water technology, a novel tool to increase growth, yield and chemical constituents of lentil (Lens esculenta) under greenhouse condition. American-Eurasian Journal of Agricultural and Environmental Science, 7(4:457-462.
- Soltani, F., Kashi, A., and Arghavani, M. 2006. Effect of Magnetic Field on Ocimum basilicum Seed Germination and Seedling Growth. In International Symposium on the Labiatae: Advances in Production, Biotechnology and Utilisation, 723:279-282.
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