Crop yield and irrigation water productivity of silage maize under two water stress strategies in semi-arid environment: Two different pot and field experiments

Gheysari, Mahdi; Pirnajmedin, Fatemeh; Movahedrad, Hamid; Majidi, Mohammad Mahdi; Zareian, Mohammad Javad

doi:10.1016/j.agwat.2021.106999

Cited by 9 publications

(7 citation statements)

References 49 publications

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“…In comparison with those previously reported in the Isfahan region by full irrigation and no nitrogen limitation with an average total biomass of 21.1 ± 1.9 tons ha −1 [33,49], the results of this study seem feasible in this area, with a difference of almost 1.9% between the simulated and observed results in RG1 region. The modified coefficient (MC) was calculated at 0.98, which was applied to other regions to modify pSIMS-CERES-Maize total biomass.…”

Section: Comparison Of Psims-ceres-maize and Experimental Data And Ca...supporting

confidence: 66%

“…Two experiments conducted in 2016 (EX-1) and 2017 (EX-2) based on full irrigation and no nutrient stress, arranged in a strip-plot design with complete randomized blocks and three replicates [33,49], were used to determine the differences between experimental total biomass and simulated by pSIMS-CERES-Maize. The experimental sites were located in the research farm of the Isfahan University of Technology in Lavark (32.54° N, 51.39° E, 1626 m).…”

Section: Comparison With Optimum Total Biomass (No Water and No Nutri...mentioning

confidence: 99%

“…Isfahan province, located in Iran, is a prominent maize production center, despite having a fluctuating climate and receiving an average annual rainfall of only around 115 mm. The importance of maize in this region and the enormous gap between the yield obtained by farmers and its potential have led to comprehensive research into maize [32,33] and the use of crop models [34] to improve knowledge of crop physiology, genetics, soil management, and weather effects. By using soil profiles and historical weather data for a specific point, Ref.…”

Section: Introductionmentioning

confidence: 99%

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Analyzing the Effects of Planting Date on the Uncertainty of CERES-Maize and Its Potential to Reduce Yield Gap in Arid and Mediterranean Climates

Ghobadi,

Gheysari,

Shayannejad

et al. 2023

Agriculture

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Decision support system tools such as crop models and considering the uncertainties associated with them are important for making an informed decision to fill the yield gap in farms and increase food security. This study’s objective was to identify and quantify the degree to which crop management practices, as well as climate and soil, affected the uncertainty of total biomass, evapotranspiration, and water productivity of silage maize by using a crop model and spatiotemporal input data. Using a calibrated crop model (DSSAT) and pSIMS platform, three planting dates by considering ten ensemble weather data and three soil profile data were simulated for the time period between 2002 and 2017 with a 2 km × 2 km resolution across maize production areas with arid and Mediterranean climates in Isfahan province, Iran. Additionally, the findings were used to determine the yield gap in the studied area to identify opportunities to boost food production. Our results showed larger uncertainty in Mediterranean climates than in arid climates, and it was more affected by planting date than weather parameters and soil profile. The accuracy of total biomass prediction by using pSIMS-CERES-Maize based on the spatiotemporal input data was 1.9% compared to field experimental data in the dry climate, and the yield gap based on the comparison of modified-pSIMS-CERES-Maize and reported biomass was 6.8 to 13 tons ha−1 in the arid and Mediterranean climate. Generally, all results represented the importance of using crop models and considering spatiotemporal data to increase reliability and accuracy, especially in Mediterranean climates, and their potential to increase food production in developing countries with limited water resources and poor agriculture management.

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Section: Comparison Of Psims-ceres-maize and Experimental Data And Ca...supporting

confidence: 66%

Section: Comparison With Optimum Total Biomass (No Water and No Nutri...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analyzing the Effects of Planting Date on the Uncertainty of CERES-Maize and Its Potential to Reduce Yield Gap in Arid and Mediterranean Climates

Ghobadi,

Gheysari,

Shayannejad

et al. 2023

Agriculture

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“…Sowing time experiments is an important means to explore the effects of temperature changes in natural environments (Isobe et al, 2022). Meanwhile, the pot trial can strictly control the growth environment of plants, which is beneficial to accurately determine the influence of experimental factors (Gheysari et al, 2021). Previous study have shown that the results from pot trial can not only explain and verify the findings from field trial, but also help to explore the physiological and biochemical mechanisms (Li et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

Effects of post-silking low temperature on the starch and protein metabolism, endogenous hormone contents, and quality of grains in waxy maize

Guo

et al. 2022

Front. Plant Sci.

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Waxy maize has many excellent characteristics in food and nonfood industries. However, post-silking low temperature (LT) has severe limitations on its grain yield and quality. In this study, field and pot trials were conducted to investigate the effects of post-silking LT on the physiological, biochemical, and functional characteristics of two waxy maize grains. The field and pot trials were performed with sowing date and artificial climate chamber, respectively, for LT treatment from silking stage to maturity. Results in pot trial were used to explain and validate the findings in field trial. Compared with the ambient treatment, the LT treatment significantly reduced kernel weight during the grain filling stage (P < 0.05). LT treatment in both environments resulted in an average decrease in dry weight of SYN5 and YN7 at maturity by 36.6% and 42.8%, respectively. Enzymatic activities related to starch and protein biosynthesis decreased under the LT treatment during the filling stage, accompanied by a decrease in the accumulation amounts and contents of soluble sugar and starch, and a decrease in protein accumulation amount. Meanwhile, the contents of abscisic acid, indole-3-acetic acid, and gibberellin 3 in grains decreased under the LT treatment during the filling stage. Peak, trough, breakdown, final, and setback viscosities of grains decreased by LT. LT treatment decreased the gelatinization enthalpy of grains and increased the retrogradation percentage. In conclusion, post-silking LT stress altered the content of grain components by inhibiting the production of phytohormones and down-regulating the enzymatic activities involved in starch and protein metabolism, which resulted in the deterioration of grain pasting and thermal properties.

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“…Water is the main limiting factor for maize production, and maize responds differently to water stress at different growth stages (Gheysari et al., 2021; Rasool et al., 2020). Moreover, the N accumulation rate and grain‐filling duration were considered as the factors affecting the proliferation of maize grain and dry matter (DM) (Olmedo Pico & Vyn, 2021).…”

Section: Introductionmentioning

confidence: 99%

Interactive effect of water and nitrogen fertilization improve chlorophyll fluorescence and yield of maize

et al. 2022

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Water scarcity and excessive N fertilization have a negative effect on maize (Zea mays L.) production. Low water and N fertilization are the major problem in sustainable agriculture by limiting crop growth and development. However, the combined effect of N fertilization and supplementary irrigation on chlorophyll fluorescence and maize yield is still not understood. The objective of the study was to signify the effect of supplementary irrigation and N fertilization on leaf area index (LAI), relative chlorophyll content (SPAD), maximum photosynthetic capacity (Fv/Fm), photochemical quenching coefficient (qP), and yield. The experiment was conducted in a split-plot design, with water management in main plot and N fertilization in subplot with three replications. Treatments included two water managements, that is, rainfed (natural rainfall) and irrigation water (70% field capacity). Five N fertilization rates were N0 (0 kg N ha −1 ), N150 (150 kg N ha −1 ), N200 (200 kg N ha −1 ), N250 (250 kg ha −1 ), and N300 (300 kg N ha −1 ). The LAI, SPAD, Fv/Fm, qP, and yield were significantly affected by water management, N rates, and their interaction (P < .05). The LAI, SPAD, Fv/Fm, qP, total dry matter accumulation, and yield under supplementary irrigation were significantly increased by 10. 99, 5.75, 6.57, 9.14, 15.64, and 14.58% than those under rainfed conditions, but the nonphotochemical quenching coefficient was significantly decreased by 22.82%. The 250 kg N ha −1 increased grain yield under irrigated conditions than that of other N treatments. The interaction between water management and N fertilization significantly and positively affected the SPAD, Fv/Fm, and grain yield in both years, but had no significant effect on LAI during 2021 and HI during 2020 and 2021. We concluded that N250 treatment with supplementary irrigation increased grain yield.

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Crop yield and irrigation water productivity of silage maize under two water stress strategies in semi-arid environment: Two different pot and field experiments

Cited by 9 publications

References 49 publications

Analyzing the Effects of Planting Date on the Uncertainty of CERES-Maize and Its Potential to Reduce Yield Gap in Arid and Mediterranean Climates

Analyzing the Effects of Planting Date on the Uncertainty of CERES-Maize and Its Potential to Reduce Yield Gap in Arid and Mediterranean Climates

Effects of post-silking low temperature on the starch and protein metabolism, endogenous hormone contents, and quality of grains in waxy maize

Interactive effect of water and nitrogen fertilization improve chlorophyll fluorescence and yield of maize

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