Deficit Irrigation Management: Concepts and Implementation

2010 ◽  
Author(s):  
Terry Howell ◽  
Freddie Lamm ◽  
Judy Tolk
Keyword(s):  
Deficit Irrigation ◽  
Irrigation Management ◽  
Management Concepts

Modeling maize production under growth stage-based deficit irrigation management with RZWQM2

2021 ◽  
Vol 248 ◽  
pp. 106767
Author(s):  
Huihui Zhang ◽  
Liwang Ma ◽  
Kyle R. Douglas-Mankin ◽  
Ming Han ◽  
Thomas J. Trout
Keyword(s):  
Deficit Irrigation ◽  
Growth Stage ◽  
Irrigation Management ◽  
Maize Production

scholarly journals Maize Seedling Establishment, Grain Yield and Crop Water Productivity Response to Seed Priming and Irrigation Management in a Mediterranean Arid Environment

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 756
Author(s):  
AbdAllah M. El-Sanatawy ◽  
Ahmed S. M. El-Kholy ◽  
Mohamed M. A. Ali ◽  
Mohamed F. Awad ◽  
Elsayed Mansour
Keyword(s):  
Grain Yield ◽  
Deficit Irrigation ◽  
Water Productivity ◽  
Irrigation Management ◽  
Seed Priming ◽  
Severe Drought ◽  
Arid Environments ◽  
Crop Water ◽  
Crop Water Productivity ◽  
Irrigation Regimes

Water shortage is a major environmental stress that destructively impacts maize production, particularly in arid regions. Therefore, improving irrigation management and increasing productivity per unit of water applied are needed, especially under the rising temperature and precipitation fluctuations induced by climate change. Laboratory and field trials were carried out in the present study, which were aimed at assessing the possibility of promoting maize germination, growth, grain yield and crop water productivity (CWP) using seed priming under different irrigation regimes. Two seed priming treatments, i.e., hydro-priming and hardening versus unprimed seeds, were applied under four irrigation regimes, i.e., 120, 100, 80 and 60% of estimated crop evapotranspiration (ETc). The obtained results indicated that increasing irrigation water from 100% up to 120% ETc did not significantly increase grain yield or contributing traits, while it decreased CWP. Deficit irrigation of 80 and 60% ETc gradually decreased grain yield and all attributed traits. Seed priming significantly ameliorated seedlings’ vigor as indicated by earlier germination, higher germination percentage, longer roots and shoots, and heavier fresh and dry weight than unprimed seeds with the superiority of hardening treatment. Additionally, under field conditions, seed priming significantly increased grain yield, yield contributing traits and CWP compared with unprimed treatment. Interestingly, the results reflect the role of seed priming, particularly hardening, in mitigating negative impacts of drought stress and enhancing maize growth, grain yield and attributed traits as well as CWP under deficit irrigation conditions. This was demonstrated by a significant increase in grain yield and CWP under moderate drought and severe drought conditions compared with unprimed treatment. These results highlight that efficient irrigation management and seed priming can increase maize yield and water productivity in arid environments.

scholarly journals Criteria for HydroSOS Quality Index. Application to Extra Virgin Olive Oil and Processed Table Olives

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 555 ◽  
Author(s):  
Paola Sánchez-Bravo ◽  
Jacinta Collado-González ◽  
Mireia Corell ◽  
Luis Noguera-Artiaga ◽  
Alejandro Galindo ◽  
...  
Keyword(s):  
Olive Oil ◽  
Deficit Irrigation ◽  
Quality Index ◽  
Fruits And Vegetables ◽  
Management Practices ◽  
Irrigation Management ◽  
Virgin Olive Oil ◽  
Extra Virgin Olive Oil ◽  
Table Olives ◽  
The Impact

Water, especially in arid and semiarid regions, is increasingly a disputed commodity among different productive sectors; the pressure for a more sustainable use of water in agriculture will grow. The main strategy to cope with water scarcity is the use of improved, innovative, and precise deficit irrigation management practices which are able to minimize the impact on fruit yield and quality. The aim of this paper was to develop a certification index or hydroSOS quality index for extra virgin olive oil and processed table olives. The hydrosSOS fruits and vegetables are those cultivated under regulated deficit irrigation (RDI). Different indicators in three quality areas ((i) fatty acids, (ii) phenolic compounds, and (iii) sensory attributes) were identified as showing characteristic or typical responses under RDI conditions. Marks or scores were assigned to each one of these indicators to calculate the proposed index. It can be concluded that an extra virgin olive oil (EVOO) or processed table olives are hydroSOStainable foods, if they meet 2 conditions: (i) fulfill the conditions established in the hydroSOS “irrigation” index, and (ii) fulfill the requirements of the hydroSOS “quality” index. HydroSOS quality index will be specific to each crop and variety and will depend on functional and sensory factors.

scholarly journals Water saving strategies assessment on processing tomato cultivated in Mediterranean region

2016 ◽  
Vol 10 (1s) ◽  
pp. 69 ◽  
Author(s):  
Marcella M. Giuliani ◽  
Giuseppe Gatta ◽  
Eugenio Nardella ◽  
Emanuele Tarantino
Keyword(s):  
Deficit Irrigation ◽  
Mediterranean Region ◽  
Irrigation Management ◽  
Marketable Yield ◽  
Irrigation Planning ◽  
Water Regimes ◽  
Processing Tomato ◽  
Water Stress Tolerance ◽  
Irrigation Regimes ◽  
Irrigation Volume

Processing tomato grown in Mediterranean region required high irrigation volume throughout growing season. A two-year study was carried out in order to investigate the effects of deficit irrigation (DI) and regulated deficit irrigation (RDI) on processing tomato cultivated under sub-arid conditions. A comparison between the irrigation management linked to common practice adopted by farmer and the irrigation management based on crop evapotranspiration (ET<sub>c</sub>) demand was also done. The tomato cv. <em>Genius</em> F1 was cultivated under five water regimes: minimal irrigation (I<sub>0</sub>), as irrigation only at transplanting and during fertilising; DI, to restore 60% ET<sub>c</sub>; RDI, to restore 60%-80%- 60% ET<sub>c</sub> across the three main tomato phenological stages; full irrigation (FI), to restore 100% ET<sub>c</sub>; and farmer irrigation (FaI), as irrigation following the subjective farmer method. Compared to FI, under the FaI regime, the seasonal irrigation volume was 31% and 26% higher in the 2009 and 2010, respectively, with not significant yield increase between the two water regimes. Among the irrigation regimes, only the RDI showed similar yield values over the two years, although 2010 was climatically less favourable. For the water use efficiency related to the marketable yield (WUE<sub>y</sub>), among the irrigation regimes, RDI showed the higher value together with FI. Finally, the K<sub>y</sub> was 0.91, which indicates moderate water stress tolerance for processing tomato cultivated in Mediterranean regions. In conclusion, the data obtained in the present study demonstrate that in Southern Italy the irrigation planning followed by the farmer does not follow the principles of sustainable irrigation. Moreover, with the adoption of the RDI strategy, it is possible to save about 27% of water maintaining high WUE<sub>y</sub> value with an increase of fruit quality. The adoption of this regime could be suggested in processing tomato cultivated under Mediterranean climate saving water in both the vegetative and ripening periods.

Deficit Irrigation Management in Early-Maturing Peach Crop

2018 ◽  
pp. 111-129 ◽  
Author(s):  
María C. Ruiz-Sánchez ◽  
Isabel Abrisqueta ◽  
Wenceslao Conejero ◽  
Juan Vera
Keyword(s):  
Deficit Irrigation ◽  
Irrigation Management ◽  
Early Maturing

scholarly journals Optimized Regulated Deficit Irrigation Management for Watermelon Cultivation in a Semiarid Region

2021 ◽  
Vol 9 (2) ◽  
pp. 113
Author(s):  
Kelly Nascimento Leite ◽  
Daniel Fonseca de Carvalho ◽  
Jose Maria Tarjuelo Martin- Benito ◽  
Geocleber Gomes de Sousa ◽  
Alfonso Dominguez Padilla
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Water Scarcity ◽  
Deficit Irrigation ◽  
Irrigation Management ◽  
Control Treatment ◽  
Water Volume ◽  
Semiarid Region ◽  
Regulated Deficit Irrigation ◽  
Use Efficiency

The present study aimed to validate the MOPECO crop simulation model and to determine a viable irrigation management for watermelon in the semiarid region of Northeast Brazil, using methodologies of optimized regulated deficit irrigation (ORDI) and constant deficit irrigation (CDI). The experiment was carried out during October to December 2013 and the second one from July to August 2014 in plots of land of producers in the Baixo Acaraú Irrigated Perimeter – Ceará, Brazil. Treatments were characterized by ORDI management (70, 80, 90% ETa/ETm ratio) and CDI management along the entire cycle (70, 80 and 90% ETm) and control treatment, irrigated with 100% of the water requirement of the crop (ETm). In terms of saving of water resources, the results showed that management with regulated deficit irrigation leads to favorable and economically viable results for the farmer, of water saving, especially in a situation of severe water scarcity, irrigation management with regulated water deficit (ORDI) can provide favorable and economically viable results for the farmer. The highest value of WUE (41.8 kg m-3) was obtained with the treatment of lowest water volume applied (352.1 L) in the second experiment, decreasing with the increase in the water volume used. The ORDI methodology represents a better water use efficiency for all treatments of deficit applied compared to CDI treatments. The difference of ORDI and CDI methodology provided an increase of up to 200% in the gross margin obtained with the exploration of the watermelon culture which represents a range of R$ 986.00 in profit in a situation of water scarcity, as in the case of the studied region, the strategy with water supply of 70% of ETa/ETm ratio regulated by phenological stage was recommended in order to obtain highest water use efficiency.

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