Amir Hossin Nazemi; Mohammad Amin Parandin; aliashraf sadraddini; Hooshang Ghamarnia
Abstract
Some experiments were performed around the Agricultural and Natural Resources Research Station of Islamabad-Gharb in order to determine The effect of surge irrigation on yield of water productivity(WP) and water use efficiency of maize in that area. The statistical design of the research was randomized ...
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Some experiments were performed around the Agricultural and Natural Resources Research Station of Islamabad-Gharb in order to determine The effect of surge irrigation on yield of water productivity(WP) and water use efficiency of maize in that area. The statistical design of the research was randomized complete block with 4 treatments in 3 replication, as a composite analysis in two years (2015 and 2016). The treatments were continuous irrigation method (c), surge irrigation method with 1 to 1 on and off flow ratio (S1-1), surge irrigation method with 1 to 2 on and off flow ratio (S1-2), surge irrigation method with 1 to 3 on and off flow ratio (S1-3). Corn variety SC704 was used for planting. The results showed that in 2015 and 2016, savings in the consumption of water compared to continuous irrigation was respectively, 10.8% and 10.4% in S1-1 treatment. 10.4% and 10.5% in S1-2 and (S1-3) treatment, respectively 11% and 10.5%. Combined analysis of variance (ANOVA) showed that performance parameters had no significant difference between treatments during different years. The results indicated that the water productivity values for total yield and grain yield were higher in surge irrigation treatment than in the continuous irrigation. WP based on total corn ear weight was 0.69 kg/m3 and based on grain weight, it was 0.54 kg/m3. These values represent 0.07 and 0.06 kg/m3 higher WP compared to continuous irrigation. The average water use efficiency was 32.3% for continuous irrigation and it was 36% for surge irrigation which was 3.7% more than continuous irrigation. Generally, the results showed that surge irrigation with a cycle ratio of 1 to 2 was more suitable for irrigation.
aliashraf sadraddini; mohammadamin parandin; Amir hossin nazemi
Abstract
Some experiments were performed around the Agricultural and Natural Resources Research Station of Islamabad-Gharb city in order to determine the reaction of corn crop to deficit irrigation strategy and its effects on yield, yield components and water productivity (WP) under furrow irrigation. The research ...
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Some experiments were performed around the Agricultural and Natural Resources Research Station of Islamabad-Gharb city in order to determine the reaction of corn crop to deficit irrigation strategy and its effects on yield, yield components and water productivity (WP) under furrow irrigation. The research used randomized complete block design (as a composite analysis in two years (2015 and 2016)). The treatments included irrigation with 100%, 75%, 50% and 25% water requirement with three replications. The SC704 Variety was used for planting corn. To compare the treatments, the 7 parameters of the performance components were considered, using analysis of variance (ANOVA). The results showed that the weight of corns in the first treatment was significantly superior to other treatments. Nevertheless, there was no significant difference in total weight of ears, ears length, seeds number per row, number of ear rows, wood weight and the weight of 1000 corns between treatments of 100% and 75% water requirement. However, in all measured attributes, there were significant differences between the other two treatments and the first and second treatments. Regarding water productivity in terms of total weight and grain weight of ears, the 75% treatment was superior to other treatments and had significant differences with the other treatments. In the treatment with 75% water requirement, WP was 0.8 kg/m3 based on the total weight of the grains, and based on the seed weight, it was 0.62 kg/m3, which were, respectively, 17% and 13% higher than the full irrigation treatment. The results showed that the highest water productivity was observed with about 30% deficit irrigation. It is to be noted that deficit irrigation may increase salinity of the root zone.