scholarly journals Factors controlling <i>Carex brevicuspis</i> leaf litter decomposition and its contribution to surface soil organic carbon pool at different water levels

2021 ◽  
Vol 18 (1) ◽  
pp. 1-11
Author(s):  
Lianlian Zhu ◽  
Zhengmiao Deng ◽  
Yonghong Xie ◽  
Xu Li ◽  
Feng Li ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Water Level ◽  
Leaf Litter ◽  
Litter Decomposition ◽  
Decomposition Rate ◽  
Dry Weight ◽  
Water Levels ◽  
Carbon Pool ◽  
Litter Input

Abstract. Litter decomposition plays a vital role in wetland carbon cycling. However, the contribution of aboveground litter decomposition to the wetland soil organic carbon (SOC) pool has not yet been quantified. Here, we conducted a Carex brevicuspis leaf litter input experiment to clarify the intrinsic factors controlling litter decomposition and quantify its contribution to the SOC pool at different water levels. The Carex genus is ubiquitous in global freshwater wetlands. We sampled this plant leaf litter at −25, 0, and +25 cm relative to the soil surface over 280 d and analysed leaf litter decomposition and its contribution to the SOC pool. The percentage litter dry weight loss and the instantaneous litter dry weight decomposition rate were the highest at +25 cm water level (61.8 %, 0.01307 d−1), followed by the 0 cm water level (49.8 %, 0.00908 d−1), and the lowest at −25 cm water level (32.4 %, 0.00527 d−1). Significant amounts of litter carbon, nitrogen, and phosphorus were released at all three water levels. Litter input significantly increased the soil microbial biomass and fungal density but had nonsignificant impacts on soil bacteria, actinomycetes, and the fungal∕bacterial concentrations at all three water levels. Compared with litter removal, litter addition increased the SOC by 16.93 %, 9.44 %, and 2.51 % at the +25, 0, and −25 cm water levels, respectively. Hence, higher water levels facilitate the release of organic carbon from leaf litter into the soil via water leaching. In this way, they increase the soil carbon pool. At lower water levels, soil carbon is lost due to the slower litter decomposition rate and active microbial (actinomycete) respiration. Our results revealed that the water level in natural wetlands influenced litter decomposition mainly by leaching and microbial activity, by extension, and affected the wetland surface carbon pool.

scholarly journals Factors controlling <i>Carex brevicuspis</i> leaf litter decomposition and its contribution to surface soil organic carbon pool at different water levels

2020 ◽  
Author(s):  
Lianlian Zhu ◽  
Zhengmiao Deng ◽  
Yonghong Xie ◽  
Xu Li ◽  
Feng Li ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Soil Carbon ◽  
Water Level ◽  
Leaf Litter ◽  
Litter Decomposition ◽  
Water Levels ◽  
Carbon Pool ◽  
Leaf Litter Decomposition ◽  
Litter Input

Abstract. Litter decomposition plays a vital role in wetland carbon cycling. However, the contribution of aboveground litter decomposition to the wetland soil organic carbon (SOC) pool has not yet been quantified. Here, we conducted a Carex brevicuspis leaf litter input experiment to clarify the intrinsic factors controlling litter decomposition and quantify it's contribution to SOC pool at different water levels. This species is ubiquitous to global freshwater wetlands. We sampled this plant leaf litter at −25, 0, and +25 cm relative to the soil surface over 280 days and analysed leaf litter decomposition and its contribution to the SOC pool. The mass loss and carbon release rates were the highest at +25 cm water level, followed by the 0 cm water level. The rates of these parameters were the lowest at −25 cm water level. Significant amounts of litter carbon, nitrogen, and phosphorus were released at all three water levels. Litter input significantly increased the soil microbial biomass and fungal density but had nonsignificant impacts on soil bacteria, actinomycetes, and fungal/bacterial concentrations at all three water levels. Compared with litter removal, litter application increased the SOC by 25.12 %, 9.58 %, and 4.98 % at the +25 cm, 0 cm, and −25 cm water levels, respectively. Hence, higher water levels facilitate the release of organic carbon from leaf litter into the soil via water leaching. In this way, they strengthen the soil carbon pool. At lower water levels, soil carbon is lost as the slower litter decomposition rate and active microbial (actinomycete) respiration. Our results revealed that the water level in natural wetlands influences litter decomposition mainly by leaching and microbial activity, by extension, affects wetland surface carbon pool.

Soil organic carbon pool under selected tree plantations in the Southern Western Ghats of Kerala, India

2021 ◽  
Vol 62 (1) ◽  
pp. 126-138
Author(s):  
Vijo Thomas Kurien ◽  
Elvin Thomas ◽  
S. Prasanth Narayanan ◽  
A. P. Thomas
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Western Ghats ◽  
Carbon Pool ◽  
Tree Plantations ◽  
Southern Western Ghats ◽  
Organic Carbon Pool

Soil organic carbon pool along different altitudinal level in the Sygera Mountains, Tibetan Plateau

2016 ◽  
Vol 13 (3) ◽  
pp. 476-483 ◽  
Author(s):  
He-ping Ma ◽  
Xiao-lin Yang ◽  
Qi-qiang Guo ◽  
Xin-jun Zhang ◽  
Chen-ni Zhou
Keyword(s):  
Tibetan Plateau ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Carbon Pool ◽  
Organic Carbon Pool

scholarly journals Organic matter mineralisation in contrasting agricultural soils amended with sewage sludge .

2014 ◽  
Vol 4 ◽  
Author(s):  
Jose Navarro Pedreño ◽  
Ignacio Gómez Lucas ◽  
Jose Martín Soriano Disla
Keyword(s):  
Organic Matter ◽  
Single Dose ◽  
Sewage Sludge ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Agricultural Soils ◽  
Dry Weight ◽  
Soil C ◽  
Multiple Sensor ◽  
Sludge Application

The mineralisation of organic matter (OM) when sewage sludge was used as amendment in 70 contrasting agricultural soils from Spain was analysed. Soils received a single dose of sewage sludge (equivalent to 50t dry weight ha<sup>-1</sup>) and the O<sub>2</sub> consumption was continuously monitored for 30 days using a multiple sensor respirometer in a laboratory experiment. The cumulative O<sub>2</sub> consumption and rates after 8 and 30 days of incubation (O<sub>2 cum</sub> 8d, 30d and O<sub>2 rate</sub> 8d, 30d), the respiratory quotient (RQ), the maximum O<sub>2</sub> rates over the incubation period (O<sub>2 max</sub>) and time from the beginning of the incubation when O<sub>2 max</sub> occurred (T<sub>max</sub>), were determined in both amended and non-amended soils. Sewage sludge application resulted in increased values for O<sub>2 max</sub>, O<sub>2 rate</sub> 8d, and O<sub>2 cum</sub> 30d. Differences were minor for T<sub>max</sub>, RQ 8d and O<sub>2 rate</sub> 30d. A considerable amount of the initial OM applied was mineralised during the first 8 days. Organic matter decomposition (as expressed by O<sub>2 cum</sub> 30d) was favoured in soils with high values of pH, carbonates, soil organic carbon and low values of amorphous Mn. Soils with these characteristics may potentially lose soil C after sewage sludge application.

scholarly journals Estimation of biomass, carbon stocks and leaf litter decomposition rate in teak Tectona grandis Linn plantations in city forest of Hasanuddin University, Makassar

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Slamet Santosa ◽  
Muhamad Ruslan Umar ◽  
Dody Priosambodo ◽  
Rizki Amalia Puji Santosa
Keyword(s):  
Leaf Litter ◽  
Litter Decomposition ◽  
Decomposition Rate ◽  
Tectona Grandis ◽  
Carbon Stocks ◽  
Leaf Litter Decomposition ◽  
Average Height ◽  
Biomass Carbon ◽  
Litter Decomposition Rate ◽  
Teak Plantations

Teak Tectona grandis Linn is still used as the main product in the form of wood, while other products, especially environmental services have not received much attention. This study analyzed biomass, carbon stocks and decomposition rate of leaf litter in teak plantations in city forest of Hasanuudin University, Makassar. The individual biomass of teak plants is calculated using the allometric equation, Y=0.11x ρ x D2.62. Carbon stocks were analyzed using a formulation, C=0.47xB. The leaf litter decomposition rate is expressed as the ratio of the remaining litter dry weight, with the formulation, X= (A-B)/A. The number of teak plants in 5 sample plots were 239 trees with an average stem diameter of 20.6cm and an average height of 9.02m. Total biomass in 5 sample plots was 51,712.61g. Carbon stock in 5 sample plots was 24,304.92g. Decomposition rate average of leaf litter of 24.4g during 60 days incubation. The existence of teak plantations is able to reduce CO2 in the atmosphere by as much as 89,199.06gCO2 and resulting in a decomposition rate of teak leaf litter 0.4g per day

Pengaruh Kerapatan Berbeda Terhadap Produksi Dan Laju Dekomposisi Serasah Mangrove Xylocarpus granatum Koenig, 1784 (Meliaceae:Rosids) dan Rhizophora apiculate Blume,1827 (Rhizophoraceae: Rosids) di Perairan Pulau Bintan

2021 ◽  
Vol 10 (2) ◽  
pp. 233-242
Author(s):  
Muslimin Muslimin ◽  
Susiana Susiana ◽  
Aditya Hikmat Nugraha
Keyword(s):  
Data Collection ◽  
Leaf Litter ◽  
Litter Decomposition ◽  
Decomposition Rate ◽  
Good Condition ◽  
Litter Production ◽  
Total Density ◽  
Rhizophora Apiculata ◽  
A Value ◽  
Xylocarpus Granatum

Penelitian mengenai Produksi dan Laju Dekomposisi Serasah Mangrove Xylocarpus granatum dan Rhizophora apiculata di Perairan Busung dan Tanjung Unggat Pulau Bintan. Tujuan penelitian ini adalah untuk membandingkan produksi dan laju dekomposisi serasah mangrove Xylocarpus granatum dan Rhizophora apiculata di perairan Busung dan Tanjung Unggat, Pulau Bintan. Penelitian ini di laksanakan pada bulan Februari – Mei 2020 mengenai produksi dan laju dekomposisi serasah mangrove X. granatum dan R. apiculata di perairan Busung dan Tanjung Unggat Pulau Bintan. Penelitian ini bertujuan membandingkan produksi dan laju dekomposisi serasah mangrove X. granatum dan  R. apiculata. Penelitian ini dilakukan dengan penentuan lokasi, kemudian persiapan alat dan bahan dan dilanjutkan dengan pengambilan data kerapatan mangrove dan pengambilan data serasah serta laju dekomposisi. Hasil penelitian ditemukan 2 jenis mangrove di 2 stasiun yaitu X. granatum dan R. apiculata. Kerapatan total di Desa Busung berjumlah 2267 pohon/ha tergolong sangat padat dan masih dalam kondisi baik sedangkan kerapatan total di Tanjung Unggat berjumlah 1200 pohon/ha tergolong sedang dan masih dalam kondisi baik. Produksi serasah tertinggi yaitu terjadi pada Stasiun Busung yaitu R. apiculata 1.47 g/m2/hari dan X. ganatum 0.83 g/m2/hari dengan kerapatan yang padat dan untuk hasil terendah terjadi pada stasiun Tanjung Unggat yaitu R. apiculata 1.09 g/m2/hari dan X. granatum 0.65 g/m2/hari dengan kerapatan sedang. Laju dekomposisi serasah daun spesies X. granatum menunjukkan nilai 0.0192 dan Laju dekomposisi serasah daun spesies R. apiculata menunjukkan nilai 0.0203. Laju dekomposisi sersah daun terjadi penurunan yang sangat signifikan pada hari ke 14 yaitu dengan kisaran 0.04 – 0.06 gr/hr. Sedangkan pada hari ke-14 sampai hari ke-28 relatif  konstan, dengan kisaran 0.01 – 0.03 gr/hr. Research on the Production and Decomposition Rate of Xylocarpus granatum and Rhizophora apiculata Mangrove Litter in Busung and Tanjung Unggat Waters, Bintan Island. The purpose of this study was to compare the production and decomposition rate of mangrove litter from Xylocarpus granatum and Rhizophora apiculata in the waters of Busung and Tanjung Unggat, Bintan Island. This research was conducted in February - May 2020 regarding the production and decomposition rate of mangrove litter X. granatum and R. apiculata in the waters of Busung and Tanjung Unggat Bintan Island. This study aims to compare the production and decomposition rate of mangrove litter X. granatum and R. apiculata. This research was conducted by determining the location, then preparing the tools and materials, followed by collecting data on mangrove density and data collection of litter and decomposition rate. The results found 2 types of mangroves at 2 stations, namely X. granatum and R. apiculata. The total density in Busung Village was 2267 trees / ha which was classified as very dense and still in good condition, while the total density in Tanjung Unggat was 1200 trees / ha which was classified as moderate and still in good condition. The highest litter production occurred at Busung Station, namely R. apiculata 1.47 g/M2/day and X. granatum 0.83 g/m2 /day with a dense density and for the lowest yield occurred at Tanjung Unggat station, namely R. apiculata 1.09 g/m2/day and X. granatum 0.65 g/m2/day with moderate density. The leaf litter decomposition rate of species X. granatum showed a value of 0.0192 and the rate of decomposition of leaf litter of species R. apiculata showed a value of 0.0203. The decomposition rate of leaf litter decreased significantly on day 14, in the range of 0.04 - 0.06 gr/day. Meanwhile, on day 14 to day 28 it is relatively constant, with a range of 0.01 - 0.03 g/day.

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