Effect of Partial Rootzone Drying Technique on Growth Performance of Sorghum

A greenhouse experiments was conducted at Faculty of Agrotechnology and Food Science Research Farm, Universiti Malaysia Terengganu to evaluate the effects of partial rootzone drying (PRD) techniques on growth performance of sorghum planted on two series of soil. Partial root zone drying (PRD) consisted of a four irrigation regimes namely full irrigation (I100), 75% (I75), 50% (I50) and 25% (I25) and the two types of soil are Rhu Tapai Soil Series and Rengam soil Series. The experiment was laid out in a randomized complete block design with eight treatments. The treatments were randomly assigned to experimental polythenebags and replicated four times. A total of thirty two polythenebags were used for the study. All agronomic practices starting from preparation to harvesting were adhered to and growth and yield parameters were recorded for the experiment. The result of the study shows that, sorghum performed better under the PRD technique. The results further revealed that, irrigation regimes I100 and I75 performed better in terms of growth parameters, crop water use efficiency, under PRD compared to I50 and I25 irrigation regimes. The study also revealed that there were interaction effects of PRD irrigation and the two types of soil on some of the parameters such as leaf area index, girth, tillers, harvest index, root dry matter used for the study. The study, therefore, recommended the use of PRD irrigation for optimizing sorghum production in this agro ecological zone. Keywords: Partial root zone drying, growth, sorghu

Effects of Regulated Deficit Irrigation on Growth of Sorghum Cultivar

The  effects of  regulated deficit irrigation technique on growth of sorghum was examined in a greenhouse at the Faculty of Agrotechnology and Food Science Research Farm, University Malaysia Terengganu. The experiments regulated deficit irrigation (RDI) consisted of a factorial combination of irrigation regimes and soil types laid in a randomised complete block design with eight treatments for each experiment which resulted into a total of sixteen 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 soil Series. The treatments were randomly assigned to experimental pots and replicated four times. A total of thirty two pots were used for the study. All agronomic practices starting from land preparation to harvesting were adhered to and growth parameters were recorded for the experiment. The result of the study shows that, sorghum performance improved under regulated deficit irrigation techniques. The results further revealed that, irrigation regimes I100 and I75 performed better in terms of growth parameters, crop water use efficiency, under Regulated deficit irrigation and compared to I50 and I25 irrigation regimes. The study also revealed that there were interaction effects of deficit irrigation and the two types of soil on some of the parameters used for the study. The study, therefore, recommended the use of I75, for optimizing sorghum growth in this agro ecological zone. Key words: Regulated deficit irrigation, Growth. Water use efficiency, Rhu Tapai soil series, Rengam soil serie

Effect of Regulated Deficit Irrigation on Growth and Yield of Sorghum

The effects of regulated deficit irrigation technique on growth and yield of sorghum was examined in a greenhouse at the Faculty of Agrotechnology and Food Science Research Farm, University Malaysia Terengganu. The experiments regulated deficit irrigation (RDI) consisted of a factorial combination of irrigation regimes and soil types laid in a randomised complete block design with eight treatments for each experiment which resulted into a total of sixteen  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 soil series. The treatments were randomly assigned to experimental pots and replicated four times. A total of thirty two pots were used for the study. All agronomic practices starting from land preparation to harvesting were adhered to and growth parameters were recorded for both experiments. The result of the study shows that sorghum performance improved under regulated deficit irrigation techniques. The results further revealed that, irrigation regimes I100 and I75 performed better in terms of growth parameters, crop water use efficiency, economic performance and profitable measures under RDI and compared to I50 and I25 irrigation regimes. The study also revealed that there were interaction effects of deficit irrigation and the two types of soil on some of the parameters used for the study. The study, therefore, recommended the use of I75, for optimizing sorghum growth in this agro ecological zone. Keywords: Regulated deficit irrigation, Growth, Yield, Sorghum, Water use efficienc

Effect of Partial Rootzone Drying Technique on Yield and Yield Components of Sorghum Cultivar

A greenhouse experiments was conducted at Faculty of Agrotechnology and Food Science Research Farm, Universiti Malaysia Terengganu to evaluate the effects of partial rootzone drying (PRD) techniques on yield and yield components of sorghum planted on two series of soil. Partial root zone drying (PRD) consisted of a four irrigation regimes namely Full irrigation (I100), 75% (I75), 50% (I50) and 25% (I25) and the two types of soil are Rhu Tapai Soil Series and Rengam soil Series. The experiment was laid out in a randomized complete block design with eight treatments. The treatments were randomly assigned to experimental polythenebags and replicated four times. A total of thirty two polythenebags were used for the study. All agronomic practices starting from preparation to harvesting were adhered to and yield parameters were recorded for the experiment. The result of the study shows that, sorghum performed better under the PRD technique. The results further revealed that, irrigation regimes I100 and I75 performed better in terms of yield and yield components, crop water use efficiency, under PRD compared to I50 and I25 irrigation regimes. The study also revealed that there were interaction effects of deficit irrigation and the two types of soil on some of the parameters such as harvest index and number of panicle used for the study. The benefit-cost ratio of sorghum production under I100 and I75 irrigation regimes were found to be economically better compared to I50 and I25 irrigation regimes for PRDI. The study, therefore, recommended the use of PRDI for optimizing sorghum production in the semi arid regions.