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YIELD RESPONSE OF WHEAT (Triticum aestivum L.) TO DEFICIT AND REGULATED DEFICIT IRRIGATION UNDER ARID/SEMI-ARID CONDITIONS
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ishaque, Wajid |
| Copyright Year | 2017 |
| Abstract | Frequent droughts and scarcity of irrigation water supplies in arid/semi-arid areas prohibit sustainable crop production. Reports on global water scarcity (Bonsch et al., 2015) indicate that approximately two-third of the world population will be facing water scarcity of certain degree in near future. This water scarcity will adversely affect food security and sustainability by reducing crop production (Hanjra and Qureshi, 2010). A sizeable quantity of water can be saved by increasing water use efficiency/productivity through environmentally sustainable and socially acceptable irrigation methods/ technologies such as high efficiency irrigation systems and deficit (DI) or regulated deficit irrigation (RDI) management strategies. These techniques have been widely used in several countries as a valuable approach where water is limiting factor in crop production (Liu et al., 2015). Unlike full irrigation (FI), deficit irrigation is a water management strategy used to increase water use efficiency (WUE) or water productivity (WP) either with water stress maintained at defined growth stage or throughout the crop growing cycle that have little impact on yield (Fereres and Soriano, 2007). The resulting yield reduction should be small enough compared to the benefits obtained by using the saved water to either bringing additional area under cultivation (Hanson et al., 2007) or irrigating other fields for which water might normally be insufficient to meet crop water demands under traditional irrigation practices. Similarly, regulated deficit irrigation (RDI) is the frequent irrigation with reduced amount of water at crop growth stages exposed to drought conditions under semi-humid or semi-arid environments (Leite et al., 2015). Many researchers reported the strategy and benefits of deficit irrigation management for different crops (El-Mageed and Semida, 2015; Samperio et al., 2015). However, research and adoption of deficit irrigation management strategy has seldom been studied in Pakistan despite heavy reliance on irrigation for crop production. Since water is getting increasingly scarce, optimizing crop yields and WUE is imperatively needed. In irrigated systems this could be achieved by scheduling irrigation in such a way that inevitable water deficit periods coincide with the least sensitive crop growth stages thus avoiding water stress at critical growth stages. It seemed justified, therefore, to explore the possibility of saving irrigation water without compromising yield. The present study was carried out to determine the impact of different irrigation regimes on yield and water productivity of wheat, and devise irrigation management Pak. J. Agri. Sci., Vol. 54(1), 135-144; 2017 ISSN (Print) 0552-9034, ISSN (Online) 2076-0906 DOI: 10.21162/PAKJAS/17.5395 http://www.pakjas.com.pk |
| Starting Page | 135 |
| Ending Page | 144 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| DOI | 10.21162/pakjas/17.5395 |
| Volume Number | 54 |
| Alternate Webpage(s) | https://pakjas.com.pk/papers/2683.pdf |
| Alternate Webpage(s) | https://doi.org/10.21162/pakjas%2F17.5395 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
