scholarly journals Regulated deficit irrigation for crop production under drought stress. A review

2015 ◽  
Vol 36 (1) ◽  
Author(s):  
Qiang Chai ◽  
Yantai Gan ◽  
Cai Zhao ◽  
Hui-Lian Xu ◽  
Reagan M. Waskom ◽  
...  
Keyword(s):  
Drought Stress ◽  
Deficit Irrigation ◽  
Crop Production ◽  
Regulated Deficit Irrigation

scholarly journals Physiological and Biochemical Responses of Orange Trees to Different Deficit Irrigation Regimes

Plants ◽  
2019 ◽  
Vol 8 (10) ◽  
pp. 423 ◽  
Author(s):  
Puglisi ◽  
Nicolosi ◽  
Vanella ◽  
Piero ◽  
Stagno ◽  
...  
Keyword(s):  
Deficit Irrigation ◽  
Crop Production ◽  
Root Zone ◽  
Irrigation Season ◽  
Regulated Deficit Irrigation ◽  
Resistivity Tomography ◽  
Micro Irrigation ◽  
Response To Water ◽  
Orange Trees ◽  
Physiological And Biochemical

The article presents the results of research consisting of the application of deficit irrigation (DI) criteria, combined with the adoption of micro-irrigation methods, on orange orchards (Citrus sinensis (L.) Osbeck) in Sicily (Italy) during the irrigation season of 2015. Regulated deficit irrigation (RDI, T3) and partial root-zone drying (PRD, T4) strategies were compared with full irrigation (T1) and sustained deficit irrigation (SDI, T2) treatments in terms of physiological, biochemical, and productive crop response. A geophysical survey (electrical resistivity tomography, ERT) was carried out to identify a link between the percentages of drying soil volume in T4 with leaves abscisic acid (ABA) signal. Results highlight that the orange trees physiological response to water stress conditions did not show particular differences among the different irrigation treatments, not inducing detrimental effects on crop production features. ABA levels in leaves were rather constant in all the treatments, except in T4 during late irrigation season. ERT technique identified that prolonged drying cycles during alternate PRD exposed more roots to severe soil drying, thus increasing leaf ABA accumulation.

scholarly journals Onion Crop Response to Regulated Deficit Irrigation under Mulching in Dry Mediterranean Region

2018 ◽  
Vol 26 (1) ◽  
pp. 87-94 ◽  
Author(s):  
Ibrahim Mubarak ◽  
Altayeb Hamdan
Keyword(s):  
Deficit Irrigation ◽  
Mediterranean Region ◽  
Crop Production ◽  
Dry Matter ◽  
Management Practice ◽  
Water Productivity ◽  
Total Yield ◽  
Water Shortage ◽  
Regulated Deficit Irrigation ◽  
Irrigation Level

Abstract Enhancing water productivity for sustainable crop production and water savings represents a major challenge for agricultural water management. Pot experiments under open field conditions were conducted for two years, 2016 and 2017, to assess the effects of regulated deficit irrigation under mulch on onion crop production, following a 2 × 3 factorial experiment with two soil cover systems (wheat straw mulch and no-mulch) and three irrigation levels (100%, 80%, and 60% of crop evapotranspiration), with six replications.The results indicated that onion plants were responsive to straw mulching. Bulb diameter, total yield, dry matter, and water productivity were significantly enhanced under mulch whatever the irrigation level used. The seasonal crop water requirements also considerably decreased (about 33%). The results also showed the sensitivity of onion to water stress. Yield, dry matter, and water productivity were higher under full irrigation compared to the deficit irrigation. However, when mulch was used, regulated deficit irrigation highly significantly improved water productivity and onion crop quality and quantity; and this approach could be a promising management practice to meet water shortage consequences in the dry Mediterranean region.

scholarly journals Fruit yield and root system distribution of 'Tommy Atkins' mango under different irrigation regimes

2014 ◽  
Vol 18 (4) ◽  
pp. 362-369 ◽  
Author(s):  
Marcelo R. dos Santos ◽  
Mauro A. Martinez ◽  
Sérgio L. R. Donato ◽  
Eugênio F. Coelho
Keyword(s):  
Phase I ◽  
Root System ◽  
Deficit Irrigation ◽  
Crop Production ◽  
Root Length Density ◽  
Fruit Yield ◽  
Phase Iii ◽  
Semiarid Region ◽  
Regulated Deficit Irrigation ◽  
Irrigation Regimes

This study aimed to evaluate the fruit yield and the distribution of 'Tommy Atkins' mango root system under different irrigation regimes in the semiarid region of Bahia. The experimental design was completely randomized with five treatments and three replicates: 1 - Irrigation supplying 100% of ETc in phases I, II and III; 2 - Regulated deficit irrigation (RDI) supplying 50% of ETc in phase I (beginning of flowering to early fruit growth); 3 - RDI supplying 50% ETc in phase II (start of expansion until the beginning of physiological maturity); 4 - RDI supplying 50% ETc in phase III (physiological mature fruits); 5 - No irrigation during all three phases. The regulated deficit irrigation supplying 50% of the ETc during phase I and II provided larger root length density of 'Tommy Atkins' mango. Regardless of management strategy, the roots were developed in all evaluated soil volume and the highest density is concentrated from 0.50 to 1.50 m distance from the trunk and in 0.20 to 0.90 m depth in the soil, that suggests this region to be the best place for fertilizer application as well for soil water sensor placement. The application of RDI during fruit set does not influence either root distribution or production. Root system and crop production is significantly reduced under no irrigation conditions.

scholarly journals Improving Drought Tolerance in Mungbean (Vigna radiata L. Wilczek): Morpho-Physiological, Biochemical and Molecular Perspectives

Agronomy ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1534
Author(s):  
Chandra Mohan Singh ◽  
Poornima Singh ◽  
Chandrakant Tiwari ◽  
Shalini Purwar ◽  
Mukul Kumar ◽  
...  
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Crop Production ◽  
Mitigation Strategies ◽  
Theoretical Research ◽  
Whole Genome Sequence ◽  
Complex Nature ◽  
Drought Tolerant ◽  
Breeding Programmes ◽  
The Impact

Drought stress is considered a severe threat to crop production. It adversely affects the morpho-physiological, biochemical and molecular functions of the plants, especially in short duration crops like mungbean. In the past few decades, significant progress has been made towards enhancing climate resilience in legumes through classical and next-generation breeding coupled with omics approaches. Various defence mechanisms have been reported as key players in crop adaptation to drought stress. Many researchers have identified potential donors, QTLs/genes and candidate genes associated to drought tolerance-related traits. However, cloning and exploitation of these loci/gene(s) in breeding programmes are still limited. To bridge the gap between theoretical research and practical breeding, we need to reveal the omics-assisted genetic variations associated with drought tolerance in mungbean to tackle this stress. Furthermore, the use of wild relatives in breeding programmes for drought tolerance is also limited and needs to be focused. Even after six years of decoding the whole genome sequence of mungbean, the genome-wide characterization and expression of various gene families and transcriptional factors are still lacking. Due to the complex nature of drought tolerance, it also requires integrating high throughput multi-omics approaches to increase breeding efficiency and genomic selection for rapid genetic gains to develop drought-tolerant mungbean cultivars. This review highlights the impact of drought stress on mungbean and mitigation strategies for breeding high-yielding drought-tolerant mungbean varieties through classical and modern omics technologies.

Using saline reclaimed water on almond grown in Mediterranean conditions: deficit irrigation strategies and salinity effects

2019 ◽  
Vol 19 (5) ◽  
pp. 1413-1421 ◽  
Author(s):  
Gaetano Alessandro Vivaldi ◽  
Salvatore Camposeo ◽  
Giuseppe Lopriore ◽  
Cristina Romero-Trigueros ◽  
Francisco Pedrero Salcedo
Keyword(s):  
Tree Growth ◽  
Deficit Irrigation ◽  
Management Practices ◽  
Water Productivity ◽  
Maximum Yield ◽  
Control Treatment ◽  
Irrigation Season ◽  
Regulated Deficit Irrigation ◽  
Trunk Diameter ◽  
Almond Trees

Abstract The main objective of this study was to acquire agronomic knowledge about the effects of irrigation with saline reclaimed (RW) and desalinated DESERT (DW) water and different irrigation strategies: control full irrigation (FI) and regulated deficit irrigation (RDI) on leaf nutrients, tree growth and fruit quality and yield of almond trees in pots. Our results showed that RW had the highest concentration of some valuable agronomic nutrients such as N, but also of phytotoxic elements (Na and Cl−). Na leaf concentration on RW treatments reached toxic levels, especially under RDI, and toxicity symptoms were shown. Regarding tree growth, cumulate trunk diameter on RW-RDI was significantly lower than on the control treatment and shoot growth was reduced from the beginning of the irrigation season in RW treatments. Maximum yield was reached on RW-FI, 18% higher than the control treatment. However, RDI strategies influenced negatively on yield, being 23% less in RW and 7% less in DW although water productivity was not significantly reduced by water stress. These findings manifest that the combination of RW and RDI can be a promising future practice for almond irrigation, but long-term studies to establish suitable management practices must be developed.

Selection for Some Functional Markers for Adaptability of Helianthus argophyllus × Helianthus annuus Derived Population under Abiotic Stress Conditions

Helia ◽  
2018 ◽  
Vol 41 (68) ◽  
pp. 83-108 ◽  
Author(s):  
Muhammad Mubashar Hussain ◽  
Maria Kausar ◽  
Saeed Rauf ◽  
M. Farukh Zafar Khan ◽  
Jakub Paderweski ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Drought Stress ◽  
Cell Membrane ◽  
Crop Production ◽  
Functional Markers ◽  
High Fertility ◽  
Epicuticular Waxes ◽  
Membrane Injury ◽  
Leaf Hairiness ◽  
Selection Of

AbstractAbiotic stresses including drought are major crop production constraints. However, specific functional phenotypic markers induce resistance against these stresses. Therefore, a study was initiated to study the variability, inheritance and selection of epicuticular waxes (EW) and leaf hairiness (LH) along with low cell membrane injuries (CMI) within F2 populations derived by crossing H. annuus×H. argophyllus lines. These traits have been shown to be associated with drought tolerance of Helianthus argophyllus and thus study aims to introgress these traits in Helinathus annuus. The studied parent populations showed contrasting values of the traits. The drought susceptible line CMS-14 and CMS-20 showed lower epicuticular waxes (0.79, 0.69 mg g−1), leaf hairiness (0.75, 1.53) and higher cell membrane injury (40.90, 55.76 %) respectively while drought resistant line Argo 1802 and 1806 showed higher epicuticular waxes (2.28, 3.18), leaf hairiness (3.71, 3.80) and lower cell membrane injury (14.22, 21.54 %) respectively. The F1 hybrids had mean values of the three studied parameters i. e. epicuticular waxes (1.50 mg g−1), cell membrance injury (32.54 %) and leaf hairiness (2.74) in the range of parent lines, but some of F2 individuals extend beyond this range (Parents and F1s). The two-step selections maintained high variability especially of LH for set of F2 individuals (H. annuus CMS-20×H. argophyllus 1806). Simultaneous selection of F2 individuals with high values of LH or EW with low CMI was possible. The selected plants were further studied for narrow leaf, high fertility and silver canopy color. Selected material was promoted as the candidate of inbred line. Plant (F4) having introgressed traits (silver canopy) showed lower yield (19 %) than green leafed plants (53 %) and commercial hybrids under drought stress (63 % and 53 %). The study could help to increase the abiotic stress tolerance, minimize the yield losses under drought stress and increase functional diversity within sunflower.

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