<i>In situ</i>short-term carbon and nitrogen dynamics in relation to microbial dynamics after a simulated rainfall in croplands of different soil texture in Thailand

Sugihara, Soh; Funakawa, Shinya; Kosaki, Takashi

doi:10.1111/j.1747-0765.2010.00516.x

Cited by 12 publications

(5 citation statements)

References 42 publications

(89 reference statements)

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“…Many studies have been conducted on the mechanisms of GHG fluxes and nutrients dynamics after rewetting of the agricultural lands. However, most of these studies focused on C and N dynamics (Werner and Egbert 2008b;Sugihara et al 2010b;Butterly et al 2009b). P fluxes in the restored wetland were less documented.…”

Section: Introductionmentioning

confidence: 99%

Effects of floating Azolla on phosphorus fluxes and recovery from former agricultural lands in wetland microcosms

Wang

et al. 2018

Soil Science and Plant Nutrition

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The long-term fertilization results in accumulation of phosphorus especially in the top layer of the soils. Inundation of agricultural lands leads to a switch to anaerobic soil condition, causing reduction of iron and leaching of phosphate simultaneously. From the ecological and environmental perspective, high nutrients flux especially phosphorus will increase the possibility of eutrophication in aquatic system. The fern Azolla had a good potential to adsorb phosphorus, it also has distinctive nitrogen-fixing capacity. We conducted a 10-week aquarium experiment to investigate the phosphorus release capacity from two agricultural soils in the Netherlands with different Fe and P concentrations but comparable Fe/P ratios. Besides, the research questions rose to whether Azolla could use the mobilized phosphate released from the soils for growth. We also tried to find an effective indicator to estimate the actually phosphate mobilization from sediment to water layer. Results showed that the soils with high Fe and P concentrations had higher phosphate release rate compared with the soil with low Fe and P concentrations. Pore water Fe: PO 4 3− ratios were valid to identify P release to surface water, when the Fe: PO 4 3− ratios less than 8 mol mol −1 substantial phosphorus mobilization occurred. The conclusions showed that the actual mobilization of phosphate is more important than the phosphorus retained in the sediments for the internal PO 4 3− fluxes. From 10-week experimental results, we found that Azolla can reuse the phosphate retained in soils thus removed the mobilized phosphate in a moderately low surface water nutrient loading.

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Section: Introductionmentioning

confidence: 99%

Effects of floating Azolla on phosphorus fluxes and recovery from former agricultural lands in wetland microcosms

Wang

et al. 2018

Soil Science and Plant Nutrition

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“…Variations in hydrology could change soil redox dynamics 14, 15 and conditions for microorganisms living 16, 17, which affects nitrogen cycle in the estuary ecosystem. Wetting–drying cycle and soil moisture could greatly change N mineralization rates, microbial biomass, and their activities 18–20. Bai et al 21 presented that marsh soils in a river floodplain showed various spatial distribution of inorganic nitrogen with different flooding frequencies.…”

Section: Introductionmentioning

confidence: 99%

Soil Net Nitrogen Mineralization in Salt Marshes with Different Flooding Periods in the Yellow River Delta, China

Gao

Bai

Xiao

et al. 2012

CLEAN Soil Air Water

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Seasonal variation of inorganic nitrogen and net nitrogen mineralization of soils were investigated by using in situ incubation method in three wetlands with different flooding periods (i.e., short‐term, seasonal, and tidal flooding) in the Yellow River Delta, China. Results showed that N mineralization in short‐term and seasonal flooding wetlands could be classified into one group. Inorganic nitrogen showed higher concentrations during the period from spring to early summer, and then it decreased after June for short‐term and seasonal flooding wetlands. Net N mineralization rate appeared negative value but sequently increased and reached the positive maximum value during the period from late autumn to early winter. However, in tidal flooding wetland, both inorganic N and N mineralization rate kept relative constant. The effects of inundation due to water and sediment regulation were different on three wetlands. Inorganic N contents in soil decreased in short‐term and seasonal flooding wetlands whereas increased in tidal flooding wetland. The changing tendency of net N mineralization rate was opposite to that of ammonium rate.

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“…Cable et al (2008) found that the response of soil respiration to precipitation in a desert largely depends on soil texture. Sugihara et al (2010) reported that sandy soils displayed higher shortterm cumulative soil CO 2 efflux than clayey soils under field conditions. In all these studies, it remained difficult to appreciate how other co-varying controls like SOC content and drainage level co-shaped the textural impact on SOC dynamics.…”

Section: Introductionmentioning

confidence: 98%

Soil texture controls added organic matter mineralization by regulating soil moisture—evidence from a field experiment in a maritime climate

Bulcke

Mendoza

et al. 2022

Geoderma

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Soil organic carbon (SOC) levels generally increase with increasing clay and silt content under similar climatic conditions because of increased physicochemical protection. Surprisingly though, many silt loam soils in Western Europe have low top SOC levels compared to coarser textured soils. Soil texture also strongly controls soil moisture with consequent indirect impact on heterotrophic activity. Especially during periods of prolonged drought, which seem to be occurring more frequently throughout Europe, it could be expected that this soil textural control of moisture retention decisively affects added organic matter (OM) decomposition. We hypothesized that, contrary to expected textural effects on physicochemical protection of OM, the higher moisture availability in silty soils strongly favors added OM mineralization during periodic drought than sandy soils. Moreover, as a secondary objective, we investigated if during prolonged drought, capillary moisture supply could significantly alleviate the water stress on added OM decomposition in sand with rather shallow groundwater table. Therefore, we established a one-year field trial in which the upper 0.5 m soil layer was replaced by sand, sandy loam and silt loam soil with low SOC. In a fourth treatment, a gravel layer was added beneath the sand layer to exclude capillary rise. Maize residues were mixed homogenously with soil in top 25 cm in all plots. Changes in soil moisture and maize-C mineralization (C maize -min) were measured. We found that soil texture did not affect C maize -min until after about five months and thereafter C maize -min rates were higher in the silt loam than in the sandy soils. Moisture content correlated positively with the C maize -min rate for the sand-textured soils only. Capillary rise did not result in a significant increase in C maize -min in the sandy soil. After one year, a larger share of added C maize was mineralized in the silt loam soil (81 ± 6%) than in the sandy soil (56 ± 7%). These results clearly highlight that soil texture controlled C maize -min indirectly through regulating moisture under the field conditions when the study area faced a period of unusual drought. Moreover, our results imply that, under future climate scenarios, more frequent droughts might lead to a lesser SOC depletion in sandy soils compared to in finer textured soils under similar management.

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In situshort-term carbon and nitrogen dynamics in relation to microbial dynamics after a simulated rainfall in croplands of different soil texture in Thailand

Cited by 12 publications

References 42 publications

Effects of floating Azolla on phosphorus fluxes and recovery from former agricultural lands in wetland microcosms

Effects of floating Azolla on phosphorus fluxes and recovery from former agricultural lands in wetland microcosms

Soil Net Nitrogen Mineralization in Salt Marshes with Different Flooding Periods in the Yellow River Delta, China

Soil texture controls added organic matter mineralization by regulating soil moisture—evidence from a field experiment in a maritime climate

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