Water Productivity of Wheat Crop as Affected by Different Sowing Dates and Deficit Irrigation Treatments | ||||
| Journal of Soil Sciences and Agricultural Engineering | ||||
| Article 6, Volume 8, Issue 10, October 2017, Page 521-529 PDF (481.86 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jssae.2017.38086 | ||||
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| Authors | ||||
| A. Taha1; M. Ibrahim2; A. Mosa1; M. EL-Komy2 | ||||
| 1Soil S. Dept., Fac. of Agric., Mansoura Univ., Egypt. | ||||
| 2Soils, Water and Environment Res. Inst., A.R.C., Egypt. | ||||
| Abstract | ||||
| Climate change scenarios require reconsidering different agricultural practices including sowing dates and irrigation intervals. For this purpose, a field experiment was carried out at the Agricultural Research Farm of Sakha Agricultural Research Station, Kafr-Elsheikh Governorate during the successive winter seasons 2013/2014 and 2014/2015 to investigate the impact of deficit water irrigation and sowing dates on wheat crop productivity(Triticum aestivum L.). The experimental site located at latitude of 30˚: 37͞ N, longitude of 31 ˚ - 57͞ E, and altitude of +6 meters above the sea level. The experimental design was split – plot with three replicates. The main plot was assigned to sowing dates of 15th November (S1) , 30th November (S2) and 15th December (S3), while the sub plot was assigned to irrigation treatments i.e. I1 (given four irrigations plus the sowing irrigation, I2 (given three irrigations following the sowing irrigation) and I3 (given two irrigations after the sowing irrigation). The highest mean values of water applied (Wa) and consumptive use (CU) were 613.6 and 485.6 mm under treatment S1I1 , respectively. While the corresponding lowest mean values were 363.3 and 310.4 mm under treatment S3I3 . The highest contribution percentages of rainfall to water applied (Wa) were 46.6% and 38.4 % for treatments S3I3 under third sowing date in the first season. While, in the second season were 43.4% and 35.7% for treatments S2I3 under the two sowing date, respectively. The lowest contribution percentages were 27.3%, 31.7 % and 27.8% , 32.4% for treatment S1I1 under first sowing date in two seasons. Moreover, the highest mean values of grain water productively (WPg), straw water productively (WPs) were recorded under S1 and I3 in the first season with values of 1.47, 1.48, 2.27 and 2.19 kg m-3, respectively. While in the second season the highest values were recorded under S2 and I3 with values 1.7, 1.59, 2.31 and 2.41 kg m-3, respectively. The highest mean values of productivity of water applied for grain and straw (PWag , PWas ) were recorded under S2, I3, in two growing seasons with values of 1.17, 2.23, 1.39, 1.33,1.82, 1.89, 1.97 and 1.92 kg m-3, respectively. In addition, biological yield, grain yield, straw yield, plant height and 1000-grain weight given the highest values under S1I1 , S2I1 in the two seasons. | ||||
| Keywords | ||||
| wheat crop; Water deficit; sowing date; Crop consumptive use; water productivity and productivity of water applied | ||||
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