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Ain Shams University (2011)

ESTIMATING WATER CONSUMPTIVE USE FOR SOME CROPS UNDER STRESS CONDITIONS USING NEUTRON SCATTERING METHOD

Salama, M.A.A.A (MOHAMED ABDELAAL AHMED)

Titre : ESTIMATING WATER CONSUMPTIVE USE FOR SOME CROPS UNDER STRESS CONDITIONS USING NEUTRON SCATTERING METHOD

Auteur : SALAMA ,MOHAMED ABDELAAL AHMED.

Etablissement de soutenance : Ain Shams University

Grade : Doctor of Philosophy (PhD) in Agricultural Science 2011

Résumé partiel
Field experiments were conducted at the Farm of Soil and Water Research Department, Nuclear Research Center, Atomic Energy Authority, Inshas, Egypt. Situated at 30o 24` N latitude, 31o 35` E longitude, while the altitude is 20m above sea level, to study the effect of fresh and irrigation water salinity on actual evapotranspiration (ETa), crop coefficient (Kc), water stress coefficient (Ks), yield, water use efficiency of both groundnut and wheat plants cultivated in sandy soil under trickle irrigation system. Complete randomized block design (CRBD) was used with four replicates and five different irrigation water treatments ; Fresh water as a control FW (0.50 dS m-1) and other four saline water treatments containing ; S1 (2.4 dS m-1), S2 (2.7 dS m-1), S3 (3.3 dS m-1), and S4 (4.4 dS m-1) for groundnut crop while they were S1 (4.9 dS m-1), S2 (6.3 dS m-1), S3 (8.7 dS m-1), and S4 (13.0 dS m-1) for wheat crop. Penman-Monteith equation was used to calculate reference evapotranspiration (ETo) based on the agro-metrological data collected for the studied area using CROPWAT v.7.0 program. Soil moisture content was monitored after and before the next irrigation using neutron moisture meter. The obtained results could be summarized as follows : br 1 - Emission uniformity (EU) : br The emission uniformity (EU) of the trickle irrigation system under studied area was (96.13 %), it is classified as Excellent. br 2 - Reference evapotranspiration (ETo) : br a - Groundnut experiment : br The total value of reference evapotranspiration (ETo) during the growth season was 871.6 mm. The value of reference evapotranspiration (ETo) through the growth season indicate they were high at the beginning of season and decreased till harvesting. br b - Wheat experiment : br The total value of reference evapotranspiration (ETo) during the growth season was 504.4 mm. The value of reference evapotranspiration (ETo) through the growth season indicate they were high at the beginning of season and increased till harvesting. This is may be due to the changes in the climatologically norms and cultivated season in this area. br 3- Actual evapotranspiration (ETa) : br a - Groundnut experiment : br Values of actual evapotranspiration (ETa) reveal that the total amount of water consumed by plants during the plant growth season under the effect of the increased irrigation water salinity follows the order : FW (629.8 mm) -gt ; S1 (608.9 mm) -gt ; S2 (598.9 mm) -gt ; S3 (596.8 mm) -gt ; S4 (545.1 mm). br b - Wheat experiment : br Values of actual evapotranspiration (ETa) reveal that the total amount of water consumed by plants during the plant growth season under the effect of the increased irrigation water salinity follows the order : FW (439.4 mm) -gt ; S1 (408.8 mm) -gt ; S2 (408.7 mm) -gt ; S3 (384.4 mm) -gt ; S4 (382.3 mm).

Présentation étendue (EULC)

Version intégrale (IAEA / INIS)

Page publiée le 2 novembre 2018, mise à jour le 5 février 2019