Natural 15N abundance as an indicator of nitrogen utilization efficiency in rice under alternate wetting and drying irrigation in soils with high clay contents

Wang, Zhenchang; Liu, Jinjing; Hamoud, Yousef Alhaj; Wang, Yaosheng; Qiu, Rangjian; Agathokleous, Evgenios; Cheng, Hong; Shaghaleh, Hiba

doi:10.1016/j.scitotenv.2022.156528

Cited by 9 publications

(7 citation statements)

References 56 publications

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“…A drainage hole at the bottom of each pot and a movable basin under the pot were used to collect percolation water. Detailed information about the experimental pots was reported in Wang et al (2022).…”

Section: Experimental Sitementioning

confidence: 99%

“…After that, the upper limit in all the treatments was set as 30 mm flooding water, and the lower limits were 100%, 90%, and 70% of saturated soil water content, respectively (denoted as I 100 , I 90 , and I 70 , respectively). The specific irrigation process in this study is shown in Wang et al (2022). The soil treatment was controlled using three different soil clay contents, i.e.…”

Section: Experimental Designmentioning

confidence: 99%

“…The S 50 and S 60 treatments were formed by mixing with respective amounts of pure clay. The selected physicochemical properties and corresponding measurements of soil are same as reported in Wang et al (2022).…”

Section: Experimental Designmentioning

confidence: 99%

“…Hence, the C allocation pattern in rice was changed accordingly (Table 1). Regarding I 90 , the potential increase in N leaching loss associated with enlarged crack volumes (detailed information shown in Wang et al, 2022) was largely offset by the rise in nitrogen retention capacity associated with increased clay content, thereby restricting the variation in the availability of water and nitrogen in soil and C allocation in rice.…”

Section: Effect Of Irrigation Regimes and Soil Clay Contents On Carbo...mentioning

confidence: 99%

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Relationships between stable isotope natural abundances (δ13C and δ15N) and water use efficiency in rice under alternate wetting and drying irrigation in soils with high clay contents

et al. 2022

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Natural abundance of the stable isotope (δ13C and δ15N) in plants is widely used to indicate water use efficiency (WUE). However, soil water and texture properties may affect this relationship, which remains largely elusive. Therefore, the purpose of this study was to evaluate δ13C as affected by different combinations of alternate wetting and drying irrigation (AWD) with varied soil clay contents in different organs and whole plant and assess the feasibility of using δ13C and δ15N as a physiological indicator of whole-plant water use efficiency (WUEwhole-plant). Three AWD regimes, I100 (30 mm flooded when soil reached 100% saturation), I90 (30 mm flooded when reached 90% saturation) and I70 (30 mm flooded when reached 70% saturation) and three soil clay contents, 40% (S40), 50% (S50), and 60% (S60), were included. Observed variations in WUEwhole-plant did not conform to theoretical expectations of the organs δ13C (δ13Corgans) of plant biomass based on pooled data from all treatments. However, a positive relationship between δ13Cleaf and WUEET (dry biomass/evapotranspiration) was observed under I90 regime, whereas there were no significant relationships between δ13Corgans and WUEET under I100 or I70 regimes. Under I100, weak relationships between δ13Corgans and WUEET could be explained by (i) variation in C allocation patterns under different clay content, and (ii) relatively higher rate of panicle water loss, which was independent of stomatal regulation and photosynthesis. Under I70, weak relationships between δ13Corgans and WUEET could be ascribed to (i) bigger cracks induced by water-limited irrigation regime and high clay content soil, and (ii) damage caused by severe drought. In addition, a negative relationship was observed between WUEwhole-plant and shoot δ15N (δ15Nshoot) across the three irrigation treatments, indicating that WUEwhole-plant is tightly associated with N metabolism and N isotope discrimination in rice. Therefore, δ13C should be used cautiously as an indicator of rice WUEwhole-plant at different AWD regimes with high clay content, whereas δ15N could be considered an effective indicator of WUEwhole-plant.

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Section: Experimental Sitementioning

confidence: 99%

Section: Experimental Designmentioning

confidence: 99%

Section: Experimental Designmentioning

confidence: 99%

Section: Effect Of Irrigation Regimes and Soil Clay Contents On Carbo...mentioning

confidence: 99%

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Relationships between stable isotope natural abundances (δ13C and δ15N) and water use efficiency in rice under alternate wetting and drying irrigation in soils with high clay contents

et al. 2022

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“…mechanism that could lead to geotechnical engineering and ecological environment problems, such as dike and slope instability (Jamalinia et al, 2020;Zhang et al, 2021b), shallow landslides (Bogaard and Greco, 2015;Caris and Van Asch, 1991;Luo et al, 2021), groundwater pollution (Chaduvula et al, 2022;Chen et al, 2002;Mooney and Morris, 2008;Schlögl et al, 2022) and reduction of irrigation efficiency (Greve et al, 2010;Smith et al, 2005;Wang et al, 2018;Wang et al, 2022).…”

mentioning

confidence: 99%

Effects of dynamic changes of desiccation cracks on preferential flow: Experimental investigation and numerical modeling

Zhang

Zhou

Lopez

et al. 2022

Preprint

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Abstract. Preferential flow induced by desiccation cracks (PF-DC) has been proven to be an important hydrological effect that could cause various geotechnical engineering and ecological environment problems. Investigation on the PF-DC remains a great challenge due to the soil shrinking-swelling behavior. This work presents an experimental and numerical study of the PF-DC considering the dynamic changes of DC. A soil column test was conducted under wetting-drying cycles to investigate the dynamic changes of DC and their hydrological response. The ratio between the crack area and soil matrix area (crack ratio), crack aperture and depth were measured. The soil water content, matrix suction and water drainage were monitored. A new dynamic dual-permeability preferential flow model (DPMDy) was developed, which includes physically-consistent functions in describing the variation of both porosity and hydraulic conductivity in crack and matrix domains. Its performance was compared to the single-domain model (SDM) and rigid dual-permeability model (DPM) with fixed crack ratio and hydraulic conductivity. The experimental results showed that the maximum crack ratio and aperture decreased when the evaporation intensity was excessively raised. The self-closure phenomenon of cracks and increased surficial water content were observed during low evaporation periods. The simulation results showed that the matrix evaporation modeled by the DPMDy is lower than that of the SDM and DPM, but its crack evaporation is the highest. Compared to the DPM, the DPMDy simulated a faster pressure head building-up process in the crack domain and higher water exchange rates from the crack to the matrix domain during rainfall. Using a fixed crack ratio in the DPM, whether it is the maximum or the average value from the experiment data, will overestimate the infiltration fluxes of PF-DC but underestimate its contribution to the matrix domain. In conclusion, the DPMDy better described the underlying physics involving crack evolution and hydrological response with respect to the SDM and DPM. Further improvement of the DPMDy should focus on the hysteresis effect of the SWRC curve and soil deformation during wetting-drying cycles.

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Interaction between water, crop residue and fertilization management on the source-differentiated nitrogen uptake by rice

Vitali,

Russo,

Moretti

et al. 2024

Biol Fertil Soils

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Alternate wetting and drying (AWD) is an effective water-saving practice for rice cultivation that may however promote nitrogen (N) losses compared to continuous flooding (CF). The interaction between water, crop residue and N fertilization management can influence the contribution of different N sources to plant uptake. We hypothesized that microbial processes driving the source-differentiated N supply for rice uptake during the early growth stages will depend on the interaction between water management, the timing of straw incorporation with respect to flooding and the temporal distribution of mineral N application. Rice was grown for 60 days in mesocosm experiment involving a factorial design with (i) two water regimes (CF vs. AWD) and (ii) three straw and fertilizer managements, during which soil N, porewater chemistry, plant growth and N uptake were evaluated. Source partitioning of plant N between fertilizer-, straw- and soil-derived N was achieved by means of a dual-stable isotope 15N tracing approach. Although AWD reduced total N uptake by about 4–25% with respect to CF, this could only be partly attributed to a lower uptake of fertilizer-N (and lower fertilizer-N use efficiency), suggesting that other N sources were affected by water management. Our findings evidence how the interaction between soil redox conditions and the availability of labile C and inorganic N strongly determined the supply of soil-derived N through microbial feedback and priming responses. Although incorporated straw contributed only minimally to rice N, it represented the primary driver controlling plant N nutrition through these microbial responses. These insights may contribute to identify suitable fertilization practices that favour plant N uptake during the early stages of rice growth under AWD.

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Natural 15N abundance as an indicator of nitrogen utilization efficiency in rice under alternate wetting and drying irrigation in soils with high clay contents

Cited by 9 publications

References 56 publications

Relationships between stable isotope natural abundances (δ13C and δ15N) and water use efficiency in rice under alternate wetting and drying irrigation in soils with high clay contents

Relationships between stable isotope natural abundances (δ13C and δ15N) and water use efficiency in rice under alternate wetting and drying irrigation in soils with high clay contents

Effects of dynamic changes of desiccation cracks on preferential flow: Experimental investigation and numerical modeling

Interaction between water, crop residue and fertilization management on the source-differentiated nitrogen uptake by rice

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