Maize (Zea mays L.) physiological responses to drought and rewatering, and the associations with water stress degree

Cai, Fanfan; Zhang, Yushu; Mi, Na; Ming, Huiqing; Zhang, Shujie; Zhang, Hui; Zhao, Xiangang

doi:10.1016/j.agwat.2020.106379

Cited by 53 publications

(30 citation statements)

References 63 publications

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“…Dry stems plus leaves values of irrigated treatments were lower in DI than in FI, but not significantly different from each other in 2020 and significantly different in 2019. It is well documented that water deficit may reduce maize dry matter accumulation, internode extension, slow down dry matter accumulation, and alter the morphology [46,[50][51][52]. Considering root weights, the different weather conditions during two growing seasons affected their value more than water inputs.…”

Section: Resultsmentioning

confidence: 99%

Adaptive Agricultural Strategies for Facing Water Deficit in Sweet Maize Production: A Case Study of a Semi-Arid Mediterranean Region

Piscitelli

Colovic

Aly

et al. 2021

Water

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Maize is a crucial global commodity, which is used not only for food, but also as an alternative crop in biogas production and as a major energy-supply ingredient in animal diets. However, climate change is jeopardizing current maize production due to its direct impact on weather instability and water availability or its indirect effects on regional climate suitability loss. Hence, new areas for sweet maize cultivation should be considered in the future. Therefore, this study focuses on the possibility of producing maize in a challenging environment in Southern Italy considering rainfed cultivation and two irrigation regimes (full and deficit). The experiment was conducted during two subsequent growing seasons under semi-arid Mediterranean climate conditions. The overall results indicated a significant difference in biomass and yield between irrigated and non-irrigated treatments, and between full and deficit irrigation. Sweet maize cultivated under deficit irrigation gained less biomass than under full irrigation and its development and fruit maturation were delayed. Under deficit irrigation, the plants gave lower yields and a higher percentage of the panicle weight consisted of kernels. Irrigation water productivity was higher for deficit than for full irrigated treatment. These findings indicate the feasibility of sweet maize production in semi-arid areas of Southern Italy using adaptive agricultural strategies including deficit irrigation and controlled water stress. Given the importance of maize production, understanding of maize growth and productivity in a challenging environment may support future agricultural programming and thereby contribute e to mitigation of the direct and indirect effects of climate change.

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Section: Resultsmentioning

confidence: 99%

Adaptive Agricultural Strategies for Facing Water Deficit in Sweet Maize Production: A Case Study of a Semi-Arid Mediterranean Region

Piscitelli

Colovic

Aly

et al. 2021

Water

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“…Our results showed that with the development of drought, LWC gradually decreased. Dynamic changes in LWC can directly reflect the degree of drought stress in maize, which is attributed to the fact that plant organ water content variations in response to drought can be used to determine the relationship between plant water content and soil moisture and play vital roles in evaluating drought impact [55]. Optimal water conditions are good for maize growth and lead to high LWC consumption; this led to the LWC decreasing faster in the treatments with more irrigation in this study.…”

Section: Discussionmentioning

confidence: 87%

Quantitative Response of Maize Vcmax25 to Persistent Drought Stress at Different Growth Stages

Song

Zhou

et al. 2021

Water

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Drought stress has adverse effects on crop growth and yield, and its identification and monitoring play vital roles in precision crop water management. Accurately evaluating the effect of drought stress on crop photosynthetic capacity can provide a basis for decisions related to crop drought stress identification and monitoring as well as drought stress resistance and avoidance. In this study, the effects of different degrees of persistent drought in different growth stages (3rd leaf stage, 7th leaf stage and jointing stage) on the maximum carboxylation rate at a reference temperature of 25 °C (Vcmax25) of the first fully expanded leaf and its relationship to the leaf water content (LWC) were studied in a field experiment from 2013 to 2015. The results indicated that the LWC decreased continuously as drought stress continued and that the LWC decreased faster in the treatment with more irrigation. Vcmax25 showed a decreasing trend as the drought progressed but had no clear relationship to the growth stage in which the persistent drought occurred. Vcmax25 showed a significantly parabolic relationship (R2 = 0.701, p < 0.001) with the LWC, but the different degrees of persistent drought stress occurring in different growth stages had no distinct effect on the LWC values when Vcmax25 reached its maximum value or zero. The findings of this study also suggested that the LWC was 82.5 ± 0.5% when Vcmax25 reached its maximum value (42.6 ± 3.6 μmol m−2 s−1) and 67.6 ± 1.2% (extreme drought) when Vcmax25 reached zero. These findings will help to improve crop drought management and will be an important reference for crop drought identification, classification and monitoring as well as for the development of drought monitoring and early warning systems for other crops or maize varieties.

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“…BDOY might be moved backward with planting date deferment. Planting usually occurs after the first rain event > 10 mm in our study area in northeastern China [37]. Irrigation can be an effective crop management method to increase carbon dioxide uptake period by advancing BDOY and promoting plant growth in summer.…”

Section: Trends In the Interannual Variability In Nep And Implications For Agricultural Practicesmentioning

confidence: 96%

“…Leaf area index (LAI) was determined by randomly sampling 5 maize plants, and manually measuring the lengths and widths of every leaf at three-leaf, seven-leaf, jointing, tasseling, and filling stages, respectively. The leaf area of each plant was obtained by adding leaf lengths multiplied by widths and a maize coefficient of 0.7 [36,37], and then LAI at every growth stage was calculated by multiplying the average leaf area of samples with plant density. The Normalized Difference Vegetation Index (NDVI, 16 days, 250 m, MOD13Q1) was downloaded from the National Aeronautics and Space Administration (NASA) website (https://modis.gsfc.nasa.…”

Section: Eddy Covariance and Auxiliary Measurementsmentioning

confidence: 99%

Interannual variability in net ecosystem carbon production in a rain-fed maize ecosystem and its climatic and biotic controls during 2005–2018

Zhang¹,

Zhao²,

Lyu³

et al. 2021

PLoS ONE

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Interannual variability (IAV) in net ecosystem carbon production (NEP) plays an important role in the processes of the carbon cycle, but the long-term trends in NEP and the climatic and biotic control of IAV in NEP still remain unclear in agroecosystems. We investigated interannual variability in NEP, expressed as annual values and anomalies, and its climatic and biotic controls using an eddy-covariance dataset for 2005–2018 for rain-fed spring maize in northeastern China. Average annual NEP was 270±31 g C m−2yr −1, with no significant changes over time. The effects on interannual variability in NEP of gross ecosystem productivity (GEP) that was mainly controlled by soil water content (SWC) and leaf area index (LAI), were more than those of respiration (RE) that was controlled by temperature and LAI. Further, maximum daily NEP (NEPmax) that was dominated by summer vapor pressure deficit explained the largest fraction of annual anomalies in NEP, followed by carbon dioxide uptake period (CUP) that was defined by the beginning date (BDOY) and the end date (EDOY) of CUP. The variability in BDOY was mainly determined by spring precipitation and the effective accumulated temperature, and the variability in EDOY was determined by autumn precipitation, SWC and LAI. NEP may decrease with declining precipitation in the future due to decreasing GEP, NEPmax, or CUP, and irrigation and residues cover may be useful in efforts to maintain current NEP levels. Our results indicate that interannual variability in NEP in agroecosystems may be more sensitive to changes in water conditions (such as precipitation, SWC and VPD) induced by climate changes, while temperature may be an important indirect factor when VPD is dominated.

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Maize (Zea mays L.) physiological responses to drought and rewatering, and the associations with water stress degree

Cited by 53 publications

References 63 publications

Adaptive Agricultural Strategies for Facing Water Deficit in Sweet Maize Production: A Case Study of a Semi-Arid Mediterranean Region

Adaptive Agricultural Strategies for Facing Water Deficit in Sweet Maize Production: A Case Study of a Semi-Arid Mediterranean Region

Quantitative Response of Maize Vcmax25 to Persistent Drought Stress at Different Growth Stages

Interannual variability in net ecosystem carbon production in a rain-fed maize ecosystem and its climatic and biotic controls during 2005–2018

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