Interactive effects of nitrate and long-term waterlogging on growth, water relations, and gaseous exchange properties of maize (Zea mays L.)

Ashraf, Muhammad; Habib-ur-Rehman, _

doi:10.1016/s0168-9452(99)00055-2

Cited by 66 publications

(39 citation statements)

References 26 publications

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“…LWP in W4 (treatment 4) decreased significantly compared to W3 (treatment 3). This finding was in keeping with earlier research, with many scholars reporting that the LWP reduced under waterlogging treatment compared to under non-waterlogging treatment, owing to rapid stomatal closure when waterlogging occurred [39]. Moreover, this research revealed that the waterlogging treatment (W4) significantly influenced the LWP more than the moderate drought (W2), especially in ST3.…”

Section: Water Condition Indicatorssupporting

confidence: 80%

Evaluating Structural, Chlorophyll-Based and Photochemical Indices to Detect Summer Maize Responses to Continuous Water Stress

Chu

et al. 2018

Water

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This study evaluates the performance of structural, chlorophyll-based, and photochemical indices to detect maize water status and to assess production based on five years of field experiments (2013-2017) during the primary growth stages. We employed three categories of indicators, including water condition and productive and thermal indicators, to quantify the responses of summer maize under continuous water stress from drought to waterlogging conditions. Furthermore, we adopted several spectral indices to assess their sensitivity to three categories of metrics. The results showed the association is the best between the treatment level and Leaf Water Content (LWC). The waterlogging treatment influenced Leaf Water Potential (LWP) in moderate drought stress. Severe drought stress caused the strongest reduction in productivity from both Leaf Area Index (LAI) and chlorophyll content. In terms of sensitivity of various indices, red-edge-position (REP) was sensitive to maize water conditions LWP, LAI and chlorophyll content. Photochemical Reflectance Index (PRI) and Normalized Difference Vegetation Index (NDVI) were the most and second most sensitive indices to productive indicators, respectively. The results also showed that no indices were capable of capturing the information of Crop Water Stress Index (CWSI).

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Section: Water Condition Indicatorssupporting

confidence: 80%

Evaluating Structural, Chlorophyll-Based and Photochemical Indices to Detect Summer Maize Responses to Continuous Water Stress

Chu

et al. 2018

Water

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“…Some caution is warranted however as growth conditions in this experiment were poor and plant growth was not as vigorous as observed in earlier experiments conducted in the same glasshouse. Low light conditions and high soil moisture (to facilitate in situ soil solution collection, results not presented) coupled with severe P deficiency (Steffens et al 2005) contributed to poorer growth (Ashraf and Habibur 1999). However all plants were exposed to the same growing conditions and P uptake by maize was comparable to similar studies undertaken by Bah et al (2006) on setaria grass, leading us to conclude these results are significant.…”

Section: Discussionsupporting

confidence: 56%

Isotopic tracing of phosphorus uptake in corn from 33P labelled legume residues and 32P labelled fertilisers applied to a sandy loam soil

et al. 2008

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In low input (e.g. organic) farming systems where soil phosphorus (P) fertilisers such as superphosphate are not used, maintaining sufficient available soil P for plant growth can be a major challenge. The use of P accumulating cover crops may increase P availability for subsequent crops. We hypothesised that P release from organic residues of legumes (faba bean (Vicia faba) and field peas (Pisum sativum)) could supply adequate P to meet the needs of a subsequent crop in a low P soil. A pot experiment was conducted to determine the contribution of P by legume green manure to subsequent corn using 33 P labelled legume residues and 32 P labelled inorganic fertiliser (KH 2 PO 4 ). The treatments included two rates of P application, (a) 10 kg P ha −1 as legume root and shoot residues or as inorganic fertiliser with and without a C source, and (b) 38 kg P ha −1 as a combination of legume shoot and root residues or a combination of root and inorganic fertiliser and inorganic fertiliser alone. An absolute control (zero P) was also used. Shoot dry matter, P uptake and P source (residues or fertilisers) of total P in corn were measured at harvest. Faba bean and field pea residues alone or in combination with fertilisers contributed up to 10% and 5% of the total P uptake by corn respectively, compared with up to 54% by inorganic fertilisers. Incorporation of field pea and faba bean residues with P concentrations higher than those observed under field conditions, may not always lead to adequate net P release to supply the early growth phase of subsequent crops.

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“…Foliar N applications significantly increased stomatal conductance along with root respiratory activity, leaf greenness and photosynthetic rate in waterlogged wheat plants [19]. In contrast, Ashraf [47] reported that stomatal conductance decreased due to waterlogging irrespective of the amount of N applied before the waterlogging event. Hybrid #2 had higher stomatal conductance than Hybrid #1 in 2014 (252 vs. 237 mmol m −2 s −1 ) and 2015 (293 vs. 269 mmol m −2 s −1 ) (data not presented).…”

Section: Stomatal Conductance During Waterloggingmentioning

confidence: 92%

Early-Season Soil Waterlogging and N Fertilizer Sources Impacts on Corn N Uptake and Apparent N Recovery Efficiency

2018

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Soil waterlogging resulting from extreme precipitation events creates anaerobic conditions that may inhibit plant growth and increase N losses. A three-year (2013)(2014)(2015) field experiment was conducted in poorly-drained claypan soils to assess the effects of waterlogging [0 or 7-days waterlogging at V3 growth stage of corn (Zea mays L.)] and pre-plant application of different N fertilizer sources and post-waterlogging rescue N application (0 or 84 kg N ha −1 of urea plus urease inhibitor (NCU + UI) at V7) on chlorophyll SPAD meter (CM) readings, stomatal conductance, ear leaf and silage N concentrations, N uptake and apparent N recovery efficiency (ARE) of two corn hybrids with varying amounts of flood tolerance. Pre-plant N fertilizer sources included a non-treated control (CO), urea (NCU), urea plus nitrification inhibitor (NCU + NI) and polymer coated urea (PCU) applied at 168 kg N ha −1 . In 7-days waterlogged plots, rescue N applications increased N uptake in PCU treatments 33% and 40% in 2013 and 2014, respectively, as well as in NCU by 48% in 2013. In 7-days waterlogged plots which received rescue N applications, NCU and PCU in 2013 resulted in higher N uptake than CO and NCU + NI by 47 to 77 kg ha −1 . PCU had higher N uptake than NCU and NCU + NI by 78 and 72 kg ha −1 in 7-days waterlogged plots that received rescue N applications in 2014. Corn hybrid showed no differences in N uptake and ARE in our study. Our results indicate combining pre-plant N fertilizer source selection and rescue N applications may be a strategy to reduce possible decreases in corn N uptake caused by early season soil waterlogging in average rainfall years.

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Interactive effects of nitrate and long-term waterlogging on growth, water relations, and gaseous exchange properties of maize (Zea mays L.)

Cited by 66 publications

References 26 publications

Evaluating Structural, Chlorophyll-Based and Photochemical Indices to Detect Summer Maize Responses to Continuous Water Stress

Evaluating Structural, Chlorophyll-Based and Photochemical Indices to Detect Summer Maize Responses to Continuous Water Stress

Isotopic tracing of phosphorus uptake in corn from 33P labelled legume residues and 32P labelled fertilisers applied to a sandy loam soil

Early-Season Soil Waterlogging and N Fertilizer Sources Impacts on Corn N Uptake and Apparent N Recovery Efficiency

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