نوع مقاله: مقاله پژوهشی
نویسندگان
1 دانش آموخته ی دوره ی دکتری تخصصی علوم و مهندسی آبیاری/ تهران، ایران
2 استاد / گروه آبیاری و زهکشی، دانشکده‌ی کشاورزی و منابع طبیعی، دانشگاه تربیت مدرس، تهران، ایران.
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Increasing scarcity of water resources and its influence on quality and quantity of crop yield motivates farmers to apply deficit irrigation as an approach to overcome the lack of water. On the other hand, the importance of water as an intermediate good in agriculture has increased competition to access water as an economic good. Consequently, determining the irrigation water price under deficit irrigation is necessary to improve water productivity. In order to assess the impact of water price on water productivity, in this study green pepper was cultivated under four different water levels including 50, 70, 100 and 120% of crop water requirement. The crop was cultivated in the writers’ personal greenhouse under controlled and isolated environmental circumstances in Tehran. The crop yield was then harvested and its dry matter measured at the end of growth period. The results showed that after applying deficit irrigation and optimizing irrigation water depth, water price was reached to the maximum which was 183.44×〖10〗^3 Rials per cubic Meter. In addition, under deficit irrigation, water use efficiency was 5.67(kg/m³), physical productivity was 5.1(kg/m³), physical-economical productivity was 191.42×〖10〗^3 (Rls/m³/ha) and economical productivity was 1.04. Furthermore, the deficit irrigation before water depth optimization did not considerably affect irrigation efficiency, while after water depth optimization, deficit irrigation resulted better irrigation efficiency than full irrigation scheme.
کلیدواژه‌ها [English]
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