TY - JOUR JF - JCPP JO - VL - 7 IS - 2 PY - 2003 Y1 - 2003/7/01 TI - Effect of Different Nitrogen Fertilizer Levels and Moisture Stress During Milky and Dough Stages on Grain Yield, Yield Components and water Use Efficiency of Corn (Zea mays L.) TT - تأثیر سطوح نیتروژن و قطع آبیاری در مراحل شیری و خمیری شدن دانه بر عملکرد، اجزای عملکرد و کارایی استفاده از آب در ذرت دانه‌ای ( Zea mays) N2 - In order to investigate the effects of different nitrogen fertilizer levels and water stress during milky and dough stages on grain yield, yield components and water use efficiency of corn hybrid SC 704 (late maturing, non prolific and dent type), a field study was conducted. The factorial design of the study comprised of a randomized complete block with four replications. Four levels of nitrogen fertilizer (0, 92, 184 and 276 kg/ha nitrogen) along with three levels of irrigation (water stress imposed at milky stage, dough stage and a season-long optimum irrigation) were used as treatments. Results showed that water stress during milky and dough stages significantly decreased grain yield and thousand kernel weight. Also, effect of nitrogen fertilizer on grain yield, kernel number per ear, kernel weight per ear and thousand kernel weight was significant. Maximum grain yield was produced with 276 kg/ha nitrogen, although no significant differences were found among 92, 184 and 276 kg/ha nitrogen levels. Regarding water use efficiency during water stress, maximum efficiency was observed at milky stage but, as water stress declined with optimum irrigation, water use efficiency decreased. SP - 103 EP - 113 AU - H. Ghadiri, AU - M. Majidian, AD - KW - Zea mays L. KW - Nitrogen KW - Moisture stress KW - Yield KW - Water use efficiency. UR - http://jcpp.iut.ac.ir/article-1-467-en.html ER -