| Abstrakt: |
Due to declining water resources allocated to agriculture anda rpid population growth, it is important to use water efficiently and incerase crop water productivity (CWP). Deficit irrigation is considered anm iportant strategy to achieve this goal. For this purpose, field experimnets were conducted at the research farm of theA griculture Faculty on Kabul Un-i versity campus for two continuous years (2018-2019). The experiment consisted of four treatments, including full irrigation (ET100), 80% (ET80), 60% (ET60), and 40% (ET40) arranged in a randomized complete block design with three replications. Compared to ET100 and ET80, the ET60 and ET40 treatments significantly (P<0.05) reduced the duration of flowering and pod formation. The bean crop also showed best performance in plant height, number of leaves per plant, leaf area, leaf area index number of pods per plant, number of seeds per pod, length of pod, 10s0e-ed weight, and total grain yield in the ET100 and ET80 treatments. Moreover, significantly greater values of crop water productivity (CWP) and lower value of Ky were observed in ET80 compared to ET100, ET60 and ET40. Overall, the experiment results showed that regulated deficit irrigtaion can effectively increase water productivity. Supplying only 80% instead of full water requirement can result in a higher common bean CW. P This is of particular importance in water-scarce areas, where the wate rsaved based on this practice can be used to irrigate additional acregae. [ABSTRACT FROM AUTHOR] |
