The Effect of Irrigation Regimes and Polymer on Several Physiological Traits of Forage Sorghum


  • M. Fazeli Rostampour Crop Physiologist Shahid Khyabaniyan Higher Education Center, affiliated to Applied Science University, Zahedan


Dry matter yield, forage sorghum, irrigation level, Superab A200 polymer


Drought is the most important limiting factor for crop production. Sorghum is among the most important forages used in arid and semi-arid regions of south-eastern Iran, but its growth and yield is often constrained by water deficit and poor productivity of sandy soil. Irrigation water is becoming more scarce and more costly. The addition of  water-saving superabsorbent polymer (SAP) in soil can improve soil physical properties, crop growth and yield and reduced the irriga­tion requirement of plants. The objective of this study was to investigate the effect of different rates of SAP and irrigation regimes on dry matter yield and some physiological and yield-related traits of Speedfeed sorghum. This experiment was conducted on sorghum×sudan grass (Sorghum bicolor (L.) Moench×S. Sudanese (Piper) Stapf, variety ‘Speedfeed’) in Zahedan, Iran during 2011 and 2012 seasons. The experimental design was a split-plot with two factors including four irrigation regime (providing 40, 60, 80 and 100% from consumptive (ET crop) of sorghum) as main plots and four amounts of SAP (0, 75, 150 and 225 kg ha-1) as subplots in a completely randomized block design with three replications. Irrigation level and SAP had significant effects on Number of leaves per plant, Number of tillers per plant, leaf area index, leaf area duration, relative water content and dry matter. The results indicated that irrigation to meet 80% of the water requirement with 75 kg ha-1 SAP may provide a desirable dry matter.




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How to Cite

Rostampour, M. F. (2013). The Effect of Irrigation Regimes and Polymer on Several Physiological Traits of Forage Sorghum. Asian Journal of Agriculture and Food Sciences, 1(5). Retrieved from