Details

Autor(en) / Beteiligte

• Al-Ghobari, Hussein M.
• Dewidar, Ahmed Z.

Titel

Integrating deficit irrigation into surface and subsurface drip irrigation as a strategy to save water in arid regions

Ist Teil von

• Agricultural water management, 2018-10, Vol.209, p.55-61

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2018

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• •A tomato crop was managed applying full and deficit irrigation through surface and subsurface drip irrigation systems.•Yield and IWUE of tomatoes for arid land area are determined.•Water saving was higher for subsurface drip irrigation in comparison with surface drip irrigation at all treatments.•Maximum yield of tomato was obtained from full irrigation treatment for both surface and subsurface drip irrigation.•Maximum IWUE tended to be higher for subsurface drip irrigation than surface drip irrigation at T2 and T3 compared to T1. Development of sustainable and efficient irrigation strategies is a priority for producers faced with water shortages. A promising management strategy for improving irrigation water use efficiency (IWUE) is deficit irrigation, which attempts to optimize yield and IWUE. Soil water use, crop yield and IWUE of tomato were evaluated for two consecutive years under two types of irrigation methods (subsurface and surface drip irrigation) and three irrigation strategies: 1.0 of full irrigation supply (T1), 0.8 of full irrigation supply (T2) and 0.6 of full irrigation supply (T3). The results showed that the highest yields were found in the plots irrigated by subsurface drip irrigation at T1 (94.1 ton/ha) and T2 (81.4 ton/ha). Conversely, the fully stressed treatment (T3) reduced the amount of irrigation water by 40%, but significantly decreased mean tomato yield by 25.6% and 26.1% under subsurface and surface drip irrigation, respectively, as compared to T1. The maximum IWUE tended to be higher for subsurface drip than for surface drip irrigation system. The greatest IWUEs were obtained from subsurface drip and surface drip at T3 (19.7 kg/m3 and 18.3 kg/m3), whereas the lowest IWUEs were those estimated in T1 (15.9 kg/m3 and 14.8 kg/m3, respectively). The primary conclusion is that deficit irrigation strategies present certain advantages to crop water management with minimal effects on production and quality, thus contributing to crop sustainability.