چکیده مقاله :
مقدمه و هدف: با توجه به تغییر الگوی کشت شهرستان گرگان به سمت محصول برنج به عنوان یک محصول آب بر از یک طرف و افت سطح سفره آب زیرزمینی از طرف دیگر، اهمیت مطالعه مدیریت منابع آب و شناخت عوامل موثر بر تقاضای آب را بیش از پیش نمایان می‌کند.
مواد و روشها: یافتهها:در این مطالعه به برآورد تابع تقاضای آب در تولید محصول برنج، با استفاده از روش‌های سیستمی و رگرسیونهای به ظاهر نامرتبط (SUR) پرداخته شد. داده‌های مربوط به این پژوهش در سال 97-1396 از راه تکمیل 314 پرسش‌نامه به روش نمونه‌گیری طبقه‌ای تصادفی از شالی‌کاران شهرستان گرگان بدست آمد.
بحث و نتیجهگیری: تقاضای آب کشش پذیر نیست، یعنی با افزایش قیمت آب تقاضای آب کاهش قابل توجهی نخواهد داشت. بنابراین پیشنهاد می‌شود در کنار ابزار قیمت آب از سیاست‌های تکمیلی نظیر افزایش راندمان و استفاده از روش‌های مدرن آبیاری نیز استفاده شود.
چکیده انگلیسی:
Introduction: Given the changing cropping pattern of Gorgan County in favor of rice as more irrigated product on one hand and groundwater level decline on the other hand, it is more important to study and identify the factors affecting rice water demand.
Materials and Methods: In this study, the estimation of water demand function in rice production was investigated using system estimation methods and seemingly unrelated regressions (SUR). The required data were collected through filling out 314 questionnaires by farmers. Sample farmers were selected by stratified random sampling method in Gorgan in 2017-18.
Findings: The results showed that most of the coefficients were significant at the 5% level and Allen's partial elasticity had the expected sign. This indicates that there is a reverse relationship between price and quantity of water demanded. The self-price elasticity of water demand indicates that for a 1 percent increase in water price, water demand decreases by 0.19 percent.
Conclusion: The demand for water is inelastic, That is, with the increase in water prices, water demand will not decrease significantly. Accordingly, it is recommended to use complementary policies such as increasing efficiency and using modern irrigation methods along with water pricing policy.
منابع و مأخذ:
Aliahmadi N, Moradi E, Hoseini SM. Application of the cost-translog technique for estimating the wheat demand function of the Sistan region. Journal of Water and Soil Conservation, 2018, Vol. 25(4), 2018.
https://www.sid.ir/fa/journal/ViewPaper.aspx?ID=495881
Asadi MA, Shahin P, Ahmadi R. Introducing a new method of rice irrigation in China. Extension Scientific Quarterly of Drought and agricultural drought, 2005, 17:13-21.
https://www.sid.ir/FileServer/JF/6001113983705.pdf
Atghaei kordkolaei M, Kavoosi Kelashemi M, F. Esmaili. Evaluating Break Point of Paddy Farms through Cost Function Approach (Case study: Guilan province). Journal of Agricultural Economics and Development. 2011, 25(2): 237-245.
https://www.sid.ir/fa/Journal/ViewPaper.aspx?id=137617
Azizian A, Salami H. Selecting the appropriate form of rice production function in Iran. Fifth Biennial Conference on Agricultural Economics in Iran. 2005,
https://civilica.com/doc/49813/
Bouhia Water in the economy: Integrating water resources into national economic planning. Harvard University ProQuest Dissertations Publishing. 1988,
https://www.proquest.com/openview/81a520fa6199f58635e1443e0d775849/1?pq-origsite=gscholar&cbl=18750&diss=y
Chambers Applied production analysis, A dual approach Cambridge University Press. 1988,
https://assets.cambridge.org/97805213/14275/frontmatter/9780521314275_frontmatter.pdf
Chizari AH, Sharzehi GA, Keramatzadeh A. The Economic Value Determination of Irrigation Water with Goal Programming Approach (Case Study of Shirvsn Barzo Dam). Journal of Economic Research (Tahghighat-E-Eghtesadi), 2005, 71:39-66.
https://www.sid.ir/fa/journal/ViewPaper.aspx?id=38250
Christensen LR, Jorgenson DW, Lou LJ. Conjugate and the transcendental Logarithmic function, Econometrica, 1971, 39: 68-259.
https://msuweb.montclair.edu/~lebelp/ChristJorgTRLGPFREAS1973.pdf
Dashti Gh, Javadi A, Eshghi TA. Estimating Economic Values of Land and Family Labor in Producing Rice. Journal of Economics and Agricultural Development, 2010, 24(4): 433-439.
https://www.sid.ir/fa/journal/ViewPaper.aspx?id=131539
Diewert EAn application of the shepherd duality theorem, A generalized Leontief production function, Journal of Political Economics, 1971, 79: 481-507.
https://doi.org/10.1086/259764
Ehsani M, Dashti Gh, Hayati B, Ghahramanzadeh M. Estimation of economic value of water in Qazvin plain irrigation network: application of dual approach. Journal of Agricultural Economics and Development. 2011, 25(2): 237-245.
https://www.sid.ir/fa/journal/ViewPaper.aspx?id=233072
Golestan Province Planning and Management Organization. Deputy of Statistics and Information. 2018,
https://www.golestanmporg.ir/
Griffin RC, Montgomery JM, Rister ME. Selecting functional from in production analysis, Western Journal of Agricultural Economics, 1987, 12: 216-227.
https://www.jstor.org/stable/40987872
Halter AN, Carter HO, Hocking JG. A note on the transcendental production, Journal of Economics, 1957, 39: 966-974.
http://hdl.handle.net/10.2307/1234207
Hosseini S SH M, Dashti Gh, Hosseinzad J, Ghahramanzadeh M. Analyzing the Production Structure and Economies of Scale in Iran’s Sugar Beet Production.. Journal of Agricultural Science and Sustainable Production, 2014,23(3): 130-141.
https://sustainagriculture.tabrizu.ac.ir/article_1560
Jahani M Asghari A. Wheat cost analysis using one-product translog cost function Case study: Arasbaran region. Journal of Economic Research, 2005, 70: 233-262.
http://ensani.ir/fa/article/82335
Keskin A, Tumer E, Dagdemir V. Demand for inputs in milk production: The case of Tokat province, Journal of Business Management, 2010, 4(6): 1126-1130.
https://academicjournals.org/journal/AJBM/article-full-text-pdf/128B83724359/
Khalilian S, Shapoorabadi A. Use of multi-product translog cost function in simultaneous estimation of cost functions and demand of agricultural inputs (Case Study: Zayandehrood of Esfahan). Journal of Agricultural Science and Technology, 2002, 16(2): 125-131.
https://www.sid.ir/fa/journal/ViewPaper.aspx?ID=11303
Kuroda The Production Structure and Demand for Labor in Postwar Japanese Agriculture, American Journal of Business Management, 1987, 4(6): 1126-1130.
https://doi.org/10.2307/1242283
Michael A, Kuznetsov D, Mirau S. Analysis of the irrigation water price in rice production Tanzania., Applied and Computational Mathematics, 2014, 3(4): 177-185.
doi: 10.11648/j.acm.20140304.19
Mansoori M, Ghiasi A. Estimating the full cost price of agricultural water at the under the reservoir dams with an engineering economics approach Case study: Bookan, Mahabad and Baroon reservoir dams in West Azerbaijan. Journal of Agricultural Economics and Development, 2002, 31: 171-191.
https://www.sid.ir/en/Journal/ViewPaper.aspx?ID=22168
Mohajeri M, Seifi A, Tahsili H. Estimation of water demand function in food industry sector of Mashhad city.2015
Pourmokhtar E, Ghaderzadeh H. Analysis of Wheat Crop Cost Structure Using Translog Function A Case Of Kurdistan Province. Journal of Development Economics and Planning, 2013, 2(1): 85-104.
https://magiran.com/p1538281
Regional water Company of Golestan, Statistics and Information Center. 2018,
www.gsrw.ir
Renwick Valuing water in a multiple-use system-irrigated agriculture and reservoir fisheries. Irigation and Drainage Systems, 2001, 15(2): 149-171.
DOI: 1023/A:1012950912505
Sadrzadeh Moghadam S, Sadeghi Z, Ghods e Elahi A. Estimating the demand function of energy and price elasticity and substitution elasticity of inputs in the industrial sector: Seemingly Unrelated Regression (SUR). Journal of Environmental Economics and Energy, 2013, 6: 107-127.
https://www.sid.ir/en/Journal/ViewPaper.aspx?ID=393369
Sorrell Energy-Capital Substitution and the Rebound Effect, St. John’s College, Oxford. 2008,
https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.519.9159&rep=rep1&type=pdf
Souri Econometrics 2 with Stata and Eviews. Farhangshenasi Pub. 2014,
https://taaghche.com/book/103237
Statistical Center of Iran. Abstract Results of Agriculture Survey. 2018,
https://www.amar.org.ir/news/ID/10408
Uzawa Production Functions with Constant Elasticity’s of Substitution, Review of Economic Studies, 1962, Vol. 29, PP. 291-9.
https://doi.org/10.2307/2296305
تحقیقات در علوم ورزشی و گیاهان دارویی. 1399؛ 1 (1): 48- 57 53
|
Zhang F, Tan Q, Zhang C, Guo S, Guo P. A regional water optimal allocation model based on the Cobb-Douglas production function under multiple uncertainties. Water, 2017, 9: 923-938.
https://doi.org/10.3390/w9120923
_||_
