نوع مقاله : مقاله پژوهشی
نویسندگان
1 موسسه تحقیقات فنی و مهندسی کشاورزی
2 مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی آذربایجان شرقی
3 استاد موسسه تحقیقات فنی و مهندسی کشاورزی، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرج
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
This study was accomplished to investigate water management indicators of irrigation systems in forage corn production in Tehran and Alborz Provinces. Forage corn farms were monitored during the growing season in the cities of Eslamshahr, Pakdasht, Shahr-rey and Savojbolagh. Corn applied irrigation water was determined by recording the irrigation schedule and measuring the flow rates. The water requirement of forage corn was estimated by Penman-Monteith method and by applying plant coefficients. The yield and water productivity for forage corn farms were obtained at the maturity stage. Irrigation applied water was statistically different during the growth season for the farms. Irrigation water averaged 3799, 6659 and 7240 m3 ha-1 for drip, sprinkler and surface irrigation systems, respectively. Results indicated that the farms with surface, sprinkler and drip irrigation consumed 18%, 13% and 32% less water than the gross irrigation requirement, respectively. The average volume of corn irrigation water in the four regions Islamshahr, Pakdasht, Shahrari and Savojbolagh was 6826, 5923, 6134 and 8126 m3/ha, respectively. Corn yield for sprinkler and surface irrigation systems averaged 51.3 and 52.8 t ha-1 for Eslamshahr and 49 and 55.5 t ha-1 for Pakdasht, respectively. The highest water productivity (20.83 kg m-3) in Pakdasht obtained from drip irrigation.
کلیدواژه‌ها [English]
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