|Author:||Nasseri, A. ; Bahramloo, R.|
|Book Group Author:||NA|
The present study was conducted to investigate the influence of early-season water stress on yield and water use efficiency (WUE) in potato cv. Marfuna. There were four levels for the fourth irrigation events at the 36 (control), 44 (W1), 51 (W2) and 59 (W3) days after planting date for three consecutive years at the Ekbatan, Iran. Initial vegetative stage is not sensitive to early-season water stress, therefore W2 produced the highest yield of 30.28 t and extra-application of water caused a decrease in yield. Consequently, control condition produced the lowest yield. Applying fourth irrigation at the 51 (W2) and 59 (W3) days after sowing, respectively resulted in yield increase as 11.28 (the highest) and 2.50% (the lowest) relative to that of 36 (W1) days after sowing. To relate tuber yield to water applied, a water production function was developed by multiple regressions analysis. Also, applying fourth event at the 51 (W2) and 36 days after sowing produced the highest (2.79 kg m-3) and the lowest (2.24 kg m-3) WUE for three cropping years. The highest increase in WUE (21.15%) relative to control condition was shown by W2. Based on water use efficiency values, it is recommended that potato cv. Marfuna should be irrigated with 59 days after sowing (W3) to achieve the optimum water use efficiency.
|Pages:||201 - 204|
|Journal:||International Journal of Agriculture and Biology|
crop yield, irrigation, plant water relations, potatoes,tubers, water stress, water use efficiency, Iran, Solanum tuberosum,West Asia, Asia, Middle East, Developing Countries, Threshold Countries,Solanum, Solanaceae, Solanales, dicotyledons, angiosperms,Spermatophyta, plants, eukaryotes, watering, Field Crops (FF005) (NewMarch 2000), Plant Water Relations (FF062), Plant Production (FF100),Environmental Tolerance of Plants (FF900), Soil Water Management(Irrigation and Drainage) (JJ800) (Revised June 2002) [formerly SoilWater Management]