Water Productivity of Wheat Crop as Affected by Different Sowing Dates and Deficit Irrigation Treatments

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 splitplot with three replicates. The main plot was assigned to sowing dates of 15 th November (S 1 ) , 30 th November (S 2 ) and 15 th December (S 3 ), while the sub plot was assigned to irrigation treatments i.e. I 1 (given four irrigations plus the sowing irrigation, I 2 (given three irrigations following the sowing irrigation) and I 3 (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 S 1 I 1 , respectively. While the corresponding lowest mean values were 363.3 and 310.4 mm under treatment S 3 I 3 . The highest contribution percentages of rainfall to water applied (Wa) were 46.6% and 38.4 % for treatments S 3 I 3 under third sowing date in the first season. While, in the second season were 43.4% and 35.7% for treatments S 2 I 3 under the two sowing date, respectively. The lowest contribution percentages were 27.3%, 31.7 % and 27.8% , 32.4% for treatment S 1 I 1 under first sowing date in two seasons. Moreover, the highest mean values of grain water productively (WP g ), straw water productively (WP s ) were recorded under S 1 and I 3 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 S 2 and I 3 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 S 2 , I 3 , in two growing seasons with

Productivity of olive oil (Coratina variety) in response to irrigation treatments in sandy soil

“…The obtained results showed a small increase in DU values in the second season compared to the first season. The obtained results were similar to those reported by Taha (2018) and Taha and Khalifa (2022), who indicated that the DU values measured for different fruit trees using a drip system with a lateral length of 24 m were 89% and 90% in the first and second seasons, respectively.…”

Effect of sowing dates and foliar spraying by some antioxidants on yield and its components for two bread wheat cultivars in New Valley governorate, Egypt

“…This may be due that originated from more suitable weather conditions during this period, which led to encouragement germination, particularly day shortage, low temperatures and light intensity with suitable growth period of wheat plants vegetative growth. These results are in line with those obtained by Farooq et al (2016), Taha et al (2017), El-Hag Dalia (2019 and Tahir et al (2019).…”

“…Choosing the right sowing dates can maximize the outcomes of the interaction between genotype and environment, thus increasing grain yield and baking quality of wheat (Silva et al, 2014). Sowing of wheat during November gave the highest values for each of the yield and its components, while the late sowing in early or mid-December led to a decrease these values and an increase in the grain content of protein (El-Hag Dalia, 2019;El-Sayed et al, 2018;Farooq et al, 2016;Taha et al, 2017).…”

Effect of Irrigation Intervals and Foliar Spray with Salicylic Acid on the production of Two Bread wheat cultivars in Newly Reclaimed Land

“…Furthermore, enough irrigation water may help the plant to absorb its need for water and nutrients as well as increased the grain-filling period (El-Hendawy, 2016). Drought stress leads to decreased fresh and dry matter production (Gora et al, 2022), total chlorophyll, and photosynthesis (Shalaby et al, 2020), and thus reduced the spike length (Kanwal et al, 2020), flag leaf area (El-Sarag and Ismaeil, 2013), grains weight spike -1 and 1000-grain weight (Al-Zahy et al, 2020 andKotb et al, 2021), grain yield (El-Nagar and EL-Gohary, 2022), and increased WUE (Taha et al, 2017). Xu et al (2016) cleared that the increase in WUE was produced from 60 mm water applied at elongation, attaining a relatively high grain yield, whereas enough irrigation with180 mm water applied increased grain yield but decreased WUE.…”