نوع مقاله : مقاله پژوهشی
نویسنده
استادیار پژوهش، بخش تحقیقات فنی و مهندسی کشاورزی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان سمنان (شاهرود)، سازمان تحقیقات،
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسنده [English]
Considering the importance of water consumption management in the agricultural sector, in this research, the application water efficiency and the water consumption volume in wheat fields of Semnan province were investigated. The volume of inflow, outflow, soil moisture before and after irrigation and the depth of root were measured and based on them, the values of application water efficiency was determined. The results showed that there is the most water losses in the first irrigation and the application water efficiency varies according to several factors such as farm management, depth, length and slope of furrows, physical properties of the soil. The average values of application water efficiency in the surface irrigation method were estimated at 30.6%. Inattention to the characteristics of the soil, the slope of the land, the depth and length of the furrows, the lack of proper leveling and inappropriate timing of irrigation with the plant's water requirements, and the low flow rate entering the furrows have caused an increase in water losses in the fields. The average volume of water consumption in Shahrood, Semnan, Damghan and Garmsar was 7700.7, 6628.3, 5875.4 and 7890.8 m3/ha, respectively. Comparing the calculated water requirement with the volume of irrigation water showed the application of deficit irrigation in the wheat fields of Semnan and Damghan. Also, the results showed that the calculated water requirement was higher than the values in the national water document. According to the area under wheat cultivation in the province, for every one percent increase in application irrigation efficiency, about 793,000 m3/ha of water will be saved.
کلیدواژهها [English]
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