seiied mohsen seyedan

Optimal and efficient application of water resources due to the recent water crisis and droughts in the country is very necessary. In this regard, the use of modern irrigation methods is one of the solutions that has been developed to increase water productivity in the country. Therefore, this study was conducted to compare the physical and economical efficiency of water in drip and surface irrigation systems and net benefit per cost in vineyards and walnut orchards. In this study, the volume of applied water was calculated by measuring the flow rate of the water source, the number of irrigations and the hours of irrigation in each irrigation. The water requirement was calculated based on the last 10 years of meteorological data and compared with the estimated water requirement in the national water document. Water productivity was estimated based on yield per unit volume of water (CPD), income per unit volume of water (BPD), and net yield per unit volume of water (NBPD). The results showed that drip irrigation method compared to surface irrigation method reduced the applied water of grape and walnut crops by 40 and 54%, respectively. Water productivity in vineyards and walnut orchards in drip irrigation system was calculated as 25.1 and 1.81 and in surface irrigation as 7.8 and 0.88 kg / m3, respectively. Calculated water requirement based on the last ten years of meteorological data in these two products was greater than the value stated in the National Water Document. Comparison of the average amount of applied water with the calculated water requirement indicated a deficit irrigation in most of the studied gardens. Comparison of Economic productivity of water in the two crops showed that this index in drip irrigation method is much higher than surface irrigation method. Net yield index per unit of water used (NBPD) in drip irrigation method in grape and walnut crops are 231 and 117, respectively, and in surface irrigation method 110 and 115 thousand Rials per cubic meter.

Hamedan province is one of the suitable areas for growing garlic, So that This product is considered as a source of income in this region. Due to traditional cultivation and And no use of new methods, productivity of production factors in producing this product are not acceptable. Since increased production by increasing the cultivated area is faced With limitations such as Water Resources limitation. Therefore, by increasing the productivity of inputs Particularly the water can be achieved by increasing production. In this regard, the study of the productivity of production factors is very important. Therefore, this study aimed to measure the productivity of production factors in two surface and sprinkler irrigation methods in garlic production in Hamedan province. The required data of this study were collected by a questionnaire from 145 of garlic farmers in Bahar and Hamedan city in 2017. In order to determine the proper yield function in both surface and sprinkler irrigation methods, the Transcendental and Translog function were used respectively. The results of this study showed that the productivity of all production factors, especially water in sprinkler irrigation system, is significantly higher than surface irrigation system. Farmers in sprinkler irrigation method are more logical in terms of water use. Physical and economic productivity of water in sprinkler and surface irrigation is 2.6, 1.76 kg per cubic meter of water and 128932 and 87146 rials per cubic meter of water, respectively. Thus, on average, the physical and economic productivity of garlic production in sprinkler irrigation is 48 percent higher than surface irrigation. Total stretch of production factors Showed that the sprinkler irrigation method has a high potential for increasing production compared to surface irrigation methods. garlic farmers use water, fertilizer and seeds optimally, but use chemical pesticides in both irrigation methods and Labor force in surface irrigation method More than the optimal amount of use. Farmers use water, fertilizer and seed optimally, but use chemical pesticides in both irrigation methods and the workforce in surface irrigation method More than the optimal amount of use. Therefore, in order to better utilize the factors of production and increase the profitability of the farm, it is necessary to reduce the use of chemical pesticides in both irrigation methods and to use less labor in surface irrigation method.

This project was conducted to evaluate irrigation water productivity and economic analysis of potato crop production in Hamedan- Bahar plain. In order to 61 potato farms which had sprinkler and furrow irrigation were selected and evaluated. Water consumption was calculated by measuring the water discharge (using WSC flume or Jet methods) for furrow irrigation and sprinkler discharge, irrigation hours per irrigation and total number of irrigation for sprinkler irrigation in the studied farms. Economic analysis of the potato production was carried out with consideration of government grants and regardless of government assistance for the sprinkler irrigation system. The average amount of water consumption and water productivity in furrow and sprinkler irrigation were estimated 14194 and 8233.23 m3/ha and 3.1 and 6.5 kg/m3, respectively. In this way, the sprinkler irrigation system with a 42% reduction in water consumption has increased the water productivity by 100%. The results of economic analysis showed that the present value of the net benefits of potato cultivation in sprinkler irrigation system relative furrow irrigation is more than about 304262 and 369941 thousand rials with or without government assistance grants, respectively. The benefit-cost ratio in sprinkler irrigation systems is 3.1 and 2.9 with or without government subsidies, respectively. This index on farms that have used furrow irrigation system was determined about 2.8. Gross income and net income were Calculated in sprinkler and Furrow irrigation about 360500, 304150 and 243355, 199992 thousand rials respectively.

In the current situation, measuring and analyzing the productivity indices of especially water production in the agricultural sector is very important and of particular importance. The purpose of this study is to measure and compare the productivity of irrigation water use in two traditional irrigation methods in wheat crop in Hamedan province. In order to achieve the objectives of this research, at first, 54 entrepreneurs were selected by random sampling method and then the necessary data were collected through field measurement, interview and completion of the questionnaire. According to the research goal, three different types of water productivity indexes including CPD, BPD and NBPD were used. Based on these results, the average physical productivity of water in the wheat product of traditional and modern irrigation system is 0.68 and 1.29 kg / m3, respectively. Also, the average economic WP of water in traditional and modern irrigation system was 3263 and 7237 Rls per m3 respectively. The highest physical and economic productivity of water was determined in Nahavand and Famenin and the lowest in Malayer.