Sammanfattning

The lack of good irrigation practices and policy reforms in Pakistan triggers major threats to the water and food security of the country. In the future, irrigation will happen under the scarcity of water, as inadequate irrigation water becomes the requirement rather than the exception. The precise application of water with irrigation management is therefore needed. This research evaluated the wheat grain yield and water use efficiency (WUE) under limited irrigation practices in arid and semi-arid regions of Pakistan. DSSAT was used to simulate yield and assess alternative irrigation scheduling based on different levels of irrigation starting from the actual irrigation level up to 65% less irrigation. The findings demonstrated that different levels of irrigation had substantial effects on wheat grain yield and total water consumption. After comparing the different irrigation levels, the high amount of actual irrigation level in semi-arid sites decreased the WUE and wheat grain yield. However, the arid site (Site-1) showed the highest wheat grain yield 2394 kg ha(-1) and WUE 5.9 kg(-3) on actual irrigation (T-1), and with the reduction of water, wheat grain yield decreased continuously. The optimal irrigation level was attained on semiarid (site-2) with 50% (T-11) less water where the wheat grain yield and WUE were 1925 kg ha(-1) and 4.47 kg(-3) respectively. The best irrigation level was acquired with 40% less water (T-9) on semi-arid (site-3), where wheat grain yield and WUE were 1925 kg ha(-1) and 4.57 kg(-3), respectively. The results demonstrated that reducing the irrigation levels could promote the growth of wheat, resulting in an improved WUE. In crux, significant potential for further improving the efficiency of agricultural water usage in the region relies on effective soil moisture management and efficient use of water. (C) 2021 The Authors. Published by Elsevier B.V. on behalf of King Saud University.

Nyckelord

Crop modelling; Crop water productivity; Deficit irrigation; Irrigation management; Water sustainability

Publicerad i

Saudi Journal of Biological Sciences
2022, Volym: 29, nummer: 2, sidor: 878-885
Utgivare: ELSEVIER

SLU författare

• Ahmed, Mukhtar

  • Arid Agriculture University
  • Institutionen för norrländsk jordbruksvetenskap, Sveriges lantbruksuniversitet
    

Globala målen

SDG2 Avskaffa hunger, uppnå tryggad livsmedelsförsörjning och förbättrad nutrition samt främja ett hållbart jordbruk


UKÄ forskningsämne

Jordbruksvetenskap


Publikationens identifierare

DOI: https://doi.org/10.1016/j.sjbs.2021.10.018

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/116289