|Author:||Ansari, H. ; Mirlatifi, S. M. ; Farshi, A. A.|
|Book Group Author:||NA|
The effects of deficit irrigation on yield, yield components, and water use efficiency (WUE) of three cultivars of early corn (301, 303, and 315) were evaluated at Varamin agricultural research institute. The experimental plots were irrigated by a line-Source sprinkler irrigation system. Six different levels of irrigation depth were considered at each sides of the lateral and treatments were replicated three times along the length of the lateral. The results indicated that corn yield and yield components decreased significantly due to deficit irrigation, but, the responses of the cultivars to deficit irrigation were not the same. The production functions of each one of the cultivars were found. Yield response factor (Ky) were found to be 1.43, 1.35 and 1.37 for 301, 301 and 315 cultivars, respectively. The highest WUE was not obtained from I6 irrigation level, but from I5 for 301 and 303 cultivars and from I4 for 315 cultivar. Cultivar 315 had the highest WUE as compared with the other two cultivars. Variations of relative yield reduction and production efficiency at different irrigation levels for each of three cultivars were approximately the same. In average, as compared with I6 treatment, in response to 1% moisture reduction, yield decreased relatively 1.4%.
|Pages:||338 - 348|
|Journal:||Iranian Journal of Soil and Water Sciences|
cultivars, experimental plots, irrigation, irrigationsystems, moisture, research, responses, sprinkler irrigation, treatment,use efficiency, water use, water use efficiency, yield components,cultivated varieties, spray irrigation, studies, trial plots, watering,Soil Water Management (Irrigation and Drainage) (JJ800) (Revised June2002) [formerly Soil Water Management], Natural Resource Economics(EE115) (New March 2000), Agricultural and Forestry Equipment (General)(NN400), Plant Production (FF100)