(2013). Impact of Soil Moisture Depletion and Splitting the Recommended Nitrogen Fertilizer Rate on Water Requirements and Water use Efficiencies of Wheat Crop in North Delta. test, 53(2), 249-266. doi: 10.21608/ejss.2013.166
. "Impact of Soil Moisture Depletion and Splitting the Recommended Nitrogen Fertilizer Rate on Water Requirements and Water use Efficiencies of Wheat Crop in North Delta". test, 53, 2, 2013, 249-266. doi: 10.21608/ejss.2013.166
(2013). 'Impact of Soil Moisture Depletion and Splitting the Recommended Nitrogen Fertilizer Rate on Water Requirements and Water use Efficiencies of Wheat Crop in North Delta', test, 53(2), pp. 249-266. doi: 10.21608/ejss.2013.166
Impact of Soil Moisture Depletion and Splitting the Recommended Nitrogen Fertilizer Rate on Water Requirements and Water use Efficiencies of Wheat Crop in North Delta. test, 2013; 53(2): 249-266. doi: 10.21608/ejss.2013.166

Impact of Soil Moisture Depletion and Splitting the Recommended Nitrogen Fertilizer Rate on Water Requirements and Water use Efficiencies of Wheat Crop in North Delta

Egyptian Journal of Soil Science
Article 8, Volume 53, Issue 2, June 2013, Pages 249-266    PDF (567.42 K)
Document Type: Original Article
DOI: 10.21608/ejss.2013.166
Abstract
A FIELDexperimentwasconducted atSakhaAgric.Res. StationFarm, KafrEl-SheikhGovernorateduring the twosuccessiveseasonsof2009/2010and 2010/2011.AsplitplotdesignwithfourreplicateswasusedtoinvestigatetheeffectofsplittingtherecommendedN-fertilizerrateunder threelevelsofavailablesoilmoisturedepletionongrain and straw yields, water requirements, as well aswater useefficiency of the wheat crop. Mainplotsweredevotedtoirrigationtreatments(I1, 40%; I2, 55% and I3, 70% available soil moisture depletion, ASMD), whereas the sub-plots were assigned to splitting the recommended rate of urea fertilizer (F1, 4-equal doses, F2, 3-equal doses and F3, 2-equal doses). The results indicated that the recorded values of water consumptive use were 1645.1, 1528.0 and 1449.8 m3/fed in the first season for I1, I2 and I3, respectively. While, the corresponding values in the second season were 1682.1, 1526.3 and 1407.0 m3/fed for the same treatments, respectively. The obtained results revealed that the highest mean values of field water use efficiency (FWUE) in the first season (1.44 , 1.34 and 1.31 kg grain/m3) were recorded under I1, I2 and I3 treatments, respectively, while in the second season, the corresponding values ( 1.32, 1.24 and 1.19 kg/m3)were givenby the above-mentioned treatments, respectively. Concerning the N-fertilizer applied, the obtained results showed that the highest mean values of FWUE in the first season were 1.42, 1.37 and 1.27 kg grain / m3 for F1, F2 and F3, respectively, whereas, in the second season, the corresponding values were 1.41, 1.21 and 1.12 kg grain / m3 for the same ones. It can be concluded that the 40 % depletion of ASMD and splitting the N-fertilizer rate into 4 equal doses is the best treatment for wheat production in North Delta.

Keywords
Wheat yield; nitrogen fertilizer; soil moisture depletion; Water requirements and Water use efficiency
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