Effect of Partial Rootzone Drying Irrigation on Nutrient Concentration in Leaves, Photosynthesis, Photosynthesis Active Radiation and Yield of Sorghum Cultivar

Adzemi Mat Arshad, Ibrahim W


The effects of partial rootzone drying irrigation technique on nutrient concentration in leaves, photosynthesis, photosynthetic active radiation and yield of sorghum grown on Rhu Tapai and Rengam series soil were examined at Control Environment House, Faculty of Agrotechnology and Food Science, University Malaysia Terengganu. The experiments partial rootzone drying irrigation consisted of a factorial combination of irrigation regimes and soil types laid in a randomized complete block design with eight treatments. Irrigation regimes were at four levels namely: I100, I75, I50 and I25 and the soil types were at two levels namely: Rhu Tapai and Rengam series soil.  The treatments were randomly assigned to experimental pots and replicated four times. All agronomic practices starting from planting of sorghum to harvesting were adhered to and photosynthesis, photosynthetic active radiation and yield parameters were recorded for the experiment. The result of the study shows that, sorghum performed better under partial rootzone drying technique. The results further revealed that, irrigation regimes I100 and I75 performed better in terms of photosynthesis, photosynthetic active radiation and yield parameters compared to I50 and I25 irrigation regimes. The study also revealed that there was no significant different between the two types of soil used for the study. The study, therefore, recommended the use of I75 percent regulated deficit irrigation for optimizing sorghum yield production in semi-arid regions.

Keywords:Partial rootzone drying irrigation, nutrient concentration, photosynthesis,    photosynthetic active radiation, yield, sorghum

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ISSN (Paper)2224-3208 ISSN (Online)2225-093X

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