Evapotranspiration, yield and water use efficiency of drip irrigated corn in the Bekaa Valley of Lebanon

Karam, F.; Breidy, Joëlle; Stephan, Chafic; Rouphael, Youssef

doi:10.1016/s0378-3774(03)00179-3

Cited by 116 publications

(67 citation statements)

References 12 publications

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“…In pair-wise comparisons of Split-U and PCU, both applied at 225 kg N ha -1 , no significant differences were observed for any response variables (data not shown). discussion urea nitrogen rate study Numerous studies have reported reduction in corn GY as a result of water stress on canopy development (Oktem, 2008;Stone et al, 2001) and kernel number and weight (Karam et al, 2003;Pandey et al, 2000). In the current study, GY significantly increased with irrigation as reported in other studies (Simsek et al, 2011;Yi et al, 2011;NeSmith and Ritchie, 1992) at all N rates in both years.…”

Section: Source/timing/rate Studysupporting

confidence: 80%

Corn Response to Nitrogen Management under Fully‐Irrigated vs. Water‐Stressed Conditions

et al. 2016

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Characterizing corn (Zea mays L.) grain yield (GY) response to N is critical for maximizing profits, increasing N use efficiency and minimizing environmental impacts. Although a large database of GY response to N exists for highly productive soils, few data exist for less productive soils. While changes in precipitation are expected in the future, few studies have compared GY response to varying N management practices under conditions of varying water availability. We measured GY and basal stalk nitrate nitrogen (BSN) at harvest using split‐applied urea at eight N rates under fully‐irrigated (FI) and water‐stressed (WS) conditions in a loamy sand over 2 yr (2009 and 2010). We also measured GY and BSN using single, pre‐plant applications of urea, polymer‐coated urea (PCU) and urea amended with urease and nitrification inhibitors (IU) at one or two N rates. The results showed that economic optimum nitrogen rate (EONR) and agronomic optimum nitrogen rate (AONR) did not vary by water management, in spite of significant increases in GY (up to 48%) under FI compared to WS. Modification of N fertilizer timing or N source was effective for increasing GY (by 18–41%) with FI, but did not affect GY under WS conditions. Averaged across years, BSN was greater with WS compared to FI at most N rates; however, BSN corresponding to AONR was within the optimal range for both water regimes. These findings may have important implications in areas where changes in irrigation practices or water availability are expected under future climate conditions. Better understanding of water stress effects on corn response to N is needed. We measured yield response to N management with full irrigation and under water‐stress. Optimum N rate did not vary by water management despite significant yield differences. Optimizing fertilizer timing or source increased yield but only with full irrigation. Basal stalk nitrate was higher with water‐stress than with full irrigation.

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Section: Source/timing/rate Studysupporting

confidence: 80%

Corn Response to Nitrogen Management under Fully‐Irrigated vs. Water‐Stressed Conditions

et al. 2016

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“…2). Water deficiency primarily affects crops by reduction of dry matter accumulation (Karam et al 2003) in which happens through TDI diminishing dry matter development (Lopez et al 1996) because of water tension, stomata conductance and photosynthesis rate (Nazemosadat and Kazemini 2008). In this experiment, irrigation with 5050-treatment reached a peak of 556.3 g fresh weight/plant.…”

Section: Results and Discussion Dry And Fresh Weight Of Corn Shootsmentioning

confidence: 99%

“…4). As it was already said, water deficiency primarily affects crops through prevention of dry matter accumulation (Karam et al 2003) due to reduced dry matter development (Lopez et al 1996). Dorjia et al (2004) represented that the DBP to roots was equal among all different treatments; nevertheless, a higher allocation was revealed in stems and leaves in TDI and PRD plants comparing the control plants.…”

Section: Dry Biomass Percentage (Dbp)mentioning

confidence: 89%

Comparison of traditional and modern deficit irrigation techniques in corn cultivation using treated municipal wastewater

Tabatabaei

Nafchi

Najafi

et al. 2017

Int J Recycl Org Waste Agricult

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Purpose Declining water resources, increasing drought period and increasing irrigated area cause a shift to deficit irrigated production which is not based on full water requirement. This study was conducted to investigate the impacts of two different deficit irrigation methods, including traditional deficit irrigation (TDI) and partial root-zone drying (PRD) on water use efficiency (WUE) in corn cultivations located at the lands close to the Shahrekord wastewater treatment plant. Methods A factorial design was employed, consisted of fifteen treatments and three replications. The first factor was three water applications, including 60, 80 and 100 (control) percent of plant water requirement. The second factor was three water sources, including 100% fresh water (FW), 50% water and 50% wastewater (5050), 100% wastewater (WW). T-Tape irrigation type system was used for irrigation of corn (Zea mays L.). The third factor was water management in three levels: full irrigation (FI), PRD and TDI. Results The result showed that dry and fresh weight, leaf area index (LAI), dry biomass percentage and WUE were affected by water requirement at 5% probability level expect of height plant that is affected at 1% probability level. Water quality was affected on all the study indicators of corn plant expect of WUE. WUE among PRD by deficit irrigation treatments were higher than TDI and it was the minimum in FI. The dry and wet weight and LAI were maximum at FI and then PDR 80 than TDI 80 . The height of corn plants were high at FI and TDI 80 than PRD 80 . Conclusion Finally, wastewater application in treatment named 5050-PRD 80 and 5050-TDI 80 compensated water deficit in WUE, LAI and dry biomass percentage. PRD method recognized more suitable than TDI for corn plants.

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“…Many studies observed reduction in plant height due to environmental stresses (Kang et al, 2000). This decrease in plant height may be (Karam et al, 2003), reduction of cell size and internodes length and accumulation of abscisic acid (Sharp, 1996). These data show that by increasing detergent dose, the leaf became thicker.…”

Section: )mentioning

confidence: 89%

Effect of Irrigation with Contaminated Water by Cloth Detergent on Seed Germination Traits and Early Growth of Sunflower (Helianthus annuus L.)

Heidari

2013

Not Sci Biol

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One of the sources for irrigation is sewage. Contaminated water may affect seed germination and plant growth. A laboratory experiment and a pot experiment were conducted in 2012 to determine the effect of different doses of detergent on seed germination traits and early growth of sunflower (Helianthus annuus L.). The experiments included eight doses of cloth detergent (0, 0.00002, 0.0002, 0.002, 0.02, 0.2, 2, 20 g/L). Results showed that 20 and 2 g/L of detergent severely reduced seed germination, plant height, leaf number per plant, total biomass and stem weight. 20 g/L of detergent reduced shoot length, root length, seedling weight and seed vigor. Seed germination stage was more sensitive to contaminated water than early growth stage. The results demonstrated that irrigating sunflower by contaminated water with household cleaning products at high concentration should be avoided.

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Evapotranspiration, yield and water use efficiency of drip irrigated corn in the Bekaa Valley of Lebanon

Cited by 116 publications

References 12 publications

Corn Response to Nitrogen Management under Fully‐Irrigated vs. Water‐Stressed Conditions

Corn Response to Nitrogen Management under Fully‐Irrigated vs. Water‐Stressed Conditions

Comparison of traditional and modern deficit irrigation techniques in corn cultivation using treated municipal wastewater

Effect of Irrigation with Contaminated Water by Cloth Detergent on Seed Germination Traits and Early Growth of Sunflower (Helianthus annuus L.)

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