scholarly journals Establishment of Quercus marilandica Muenchh. and Juniperus virginiana L. in the Tallgrass Prairie of Oklahoma, USA Increases Litter Inputs and Soil Organic Carbon

Forests ◽  
2019 ◽  
Vol 10 (4) ◽  
pp. 329 ◽  
Author(s):  
Vanessa C. Nunes Biral ◽  
Rodney E. Will ◽  
Chris B. Zou
Keyword(s):  
Carbon Sequestration ◽  
Soil Carbon ◽  
Tallgrass Prairie ◽  
Root Biomass ◽  
Soil Layer ◽  
Tree Canopy ◽  
Juniperus Virginiana ◽  
Soil Carbon Stock ◽  
Coarse Root ◽  
Quercus Marilandica

The establishment of trees in grasslands alters ecosystem processes and services. Litter inputs shift from herbaceous to tree-derived, which affects the litter quantity and quality and may in turn alter soil carbon dynamics and ecosystem-level carbon sequestration. This study determined changes in the quantity of organic matter inputs following encroachment by two native tree species (Quercus marilandica Muenchh. and Juniperus virginiana L.) into a tallgrass prairie in northcentral Oklahoma, and related it to spatial heterogeneity in soil carbon by measuring variables near the stem, under the tree canopy, at the outer edge of the tree canopy, and beyond the tree canopy. Presence of trees increased aboveground litter inputs (dominated by foliage for J. virginiana and acorns for Q. marilandica) and increased the duff and litter layer. Regardless of leaf litter source, decomposition of foliage was slower under the tree canopy than beyond the tree canopy (7% slower) and this change was associated with cooler and potentially drier conditions. However, the foliage of trees decomposed more quickly than grass foliage when measured both beneath and beyond the tree canopy (25% faster). Coarse root biomass was greater under tree canopies than beyond, which increased total root biomass in the deeper soil layer (10–30 cm). The net effect was an approximately 15% increase in soil carbon stock under the trees as compared to areas beyond the tree canopy. Therefore, in addition to greater carbon storage in the aboveground biomass, tree encroachment increases carbon sequestration by increasing soil carbon.

ARGUMENTS AND FACTS AGAINST THE INITIATIVE «SOIL CARBON 4 PER MILLE»

2020 ◽  
Author(s):  
Boris Kogut ◽  
Keyword(s):  
Carbon Sequestration ◽  
Soil Carbon ◽  
21St Century ◽  
Critical Analysis ◽  
Soil Layer

A critical analysis of the 4‰-initiative ideas is given. Data on the actual sizes of carbon sequestration in the upper soil layer are presented. The “Soil carbon 4 per mille” initiative is too politicized and commercialized. It does not withstand any scientific criticism and cannot be implemented in the 21st century.

scholarly journals Changes in soil carbon stock in Mewat and Dhar under cereal and legume based cropping systems

2019 ◽  
Author(s):  
B. Chakrabarti ◽  
S.K. Bandyopadhyay ◽  
D. Pratap ◽  
H. Pathak ◽  
R. Mittal ◽  
...  
Keyword(s):  
Soil Carbon ◽  
Carbon Stock ◽  
Management Practices ◽  
Surface Soil ◽  
Cropping Systems ◽  
Soil Layer ◽  
Cropping System ◽  
Soil Carbon Stock ◽  
Cropping Sequence ◽  
Surface Soil Layer

Soil organic carbon is strongly affected by agricultural management practices. Cropping systems can influence the amount of carbon present in soil. Increase in SOC can be related with the choice of crops present in the cropping sequence as well as on the management practices followed. The present study was undertaken to quantify the changes in soil carbon stock under different cropping systems. Two major cropping systems i.e. pearlmillet-wheat and pearlmillet-mustard were selected in Mewat, Haryana while soybean-wheat cropping systems was identified in Dhar, Madhya Pradesh. Results showed that SOC of surface soil layer decreased from 0.42% to 0.39% in pearlmillet-mustard cropping system during the study period. But in soybean-wheat cropping system it increased from 1.14% to 1.24%. Legume based cropping system showed enhancement of surface soil carbon.

scholarly journals Carbon Sequestration and Productivity Potential of Coconut (Cocos nucifera L.) Hybrids and Varieties under Coastal Eco-System of Maharashtra

2020 ◽  
pp. 30-37
Author(s):  
S. L. Ghavale ◽  
V. V. Shinde ◽  
S. M. Wankhede ◽  
H. P. Maheswarappa ◽  
P. M. Haldankar
Keyword(s):  
Carbon Sequestration ◽  
Soil Carbon ◽  
Carbon Stock ◽  
Cocos Nucifera ◽  
Block Design ◽  
Research Station ◽  
Soil Carbon Stock ◽  
Randomized Block Design ◽  
Cocos Nucifera L ◽  
Productivity Potential

Field experiment was carried out at All India Coordinated Research Project on Palms, Regional Coconut Research Station, Bhatye (DBSKKV, Dapoli), Maharashtra, (India) during the period of 2004-2016 to assess the carbon sequestration and productivity potential of twelve coconut hybrids and three varieties which was laid out in a randomized block design with three replications. Results showed that the two hybrids viz, GBGD x ECT (127.6 nuts/palm/year) and COD x LCT (108.0 nuts/palm/year) are superior with respect to nut production followed by WCT x MYD (107.6 nuts), ECT x GBGD (106.9 nuts) and the standard variety ‘Pratap’. Furthermore, the coconut orchard substantially contributed towards improving the above and below ground carbon stock. The above ground standing biomass and carbon stock recorded was the highest in the variety East Coast Tall (312 kg/plant and 27.32 t/ha, respectively) followed by hybrid WCT x GBGD (308.69 kg/plant and 27.01 t/ha, respectively) and the lowest was in hybrid MYD x ECT (138.71 kg/plant and 12.14 t/ha, respectively). The highest soil carbon stock 39.12 t/ha and 37.16 t/ha at 0-30 and 31-60 cm depth was recorded in the rhizosphere of hybrid ECT x MYD and the lowest soil carbon stock (35.52 t/ha and 34.71 t/ha) was observed in hybrid PHOT x GBGD.

Carbon dioxide fluxes on agricultural grasslands – Uncertainty associated with gap-filling

2020 ◽  
Author(s):  
Henriikka Vekuri ◽  
Juha-Pekka Tuovinen ◽  
Mika Korkiakoski ◽  
Laura Heimsch ◽  
Liisa Kulmala ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Soil Carbon ◽  
Eddy Covariance ◽  
Carbon Stock ◽  
Management Practices ◽  
Terrestrial Ecosystems ◽  
Carbon Markets ◽  
Gap Filling ◽  
Soil Carbon Stock ◽  
Uncertainty Estimates

<p>Mitigation of climate change requires – besides reductions in greenhouse gas emissions – actions to increase carbon sinks and storages in terrestrial ecosystems. Agricultural lands have a high potential for increased carbon sequestration through climate-smart land management and agricultural practices. However, in order to make climate-smart farming an accredited solution for climate policy, carbon markets and product footprints, reliable verification of carbon sequestration is needed. Direct measurement of the changes in soil carbon stock is slow, laborious and expensive and has significant uncertainties due to large background stocks and high spatial variability. An alternative is to infer the soil carbon stock change from measurements of the gaseous carbon fluxes between ecosystems and the atmosphere using the micrometeorological eddy covariance (EC) method.</p><p>Eddy covariance measures net ecosystem exchange (NEE), which is a small difference between two large components: carbon uptake by photosynthesis and losses due to plant and soil respiration. Therefore, small changes in either of them results in a large change in NEE. This sensitivity is also reflected in uncertainty estimates, which are critical for defining confidence intervals for annual carbon budget estimates and for making statistically valid comparisons of different management practices.  In addition, there are inevitable gaps in the data due to instrument failure, power shortages and non-ideal flow conditions. Therefore, in order to calculate daily and annual sums, the collected data must be temporally upscaled or gap-filled, which constitutes a major additional source of uncertainty. This study compares two different gap-filling methods for CO₂ fluxes: (1) an artificial neural network and (2) non-linear regression, which uses temperature and radiation as drivers. Uncertainties associated with both methods are estimated and discussed. The analysis is based on EC flux measurements conducted at two agricultural grassland sites in Finland.</p>

Mitigation of climate change with biomass harvesting in Norway spruce stands: are harvesting practices carbon neutral?

2015 ◽  
Vol 45 (2) ◽  
pp. 217-225 ◽  
Author(s):  
Raisa Mäkipää ◽  
Tapio Linkosalo ◽  
Alexander Komarov ◽  
Annikki Mäkelä
Keyword(s):  
Carbon Sequestration ◽  
Soil Carbon ◽  
Carbon Stock ◽  
Energy Production ◽  
Fossil Fuels ◽  
Rotation Period ◽  
Forest Carbon ◽  
Forest Residues ◽  
Soil Carbon Stock ◽  
Biomass Harvesting

Biomass combustion is considered to be carbon neutral, but intensive biomass harvesting may negatively impact carbon stocks in forest soil and vegetation, which can offset the benefits of substituting fossil fuels with biomass. Here we evaluated conventional stem-only harvesting, whole-tree harvesting (WTH), and WTH excluding needles in terms of timber yield, biomass harvests, and forest carbon sequestration. We simulated harvest scenarios in current and changed climates with a process-based growth model (PipeQual) that was integrated with models describing soil decomposition (ROMUL) and soil water dynamics. Furthermore, we compared gains and losses of forest carbon with reductions in fossil-fuel emissions that result from using harvested biomass for energy production. WTH negatively affected stand growth, biomass, and soil carbon stock; negative effects on growth and biomass can be reduced by leaving nitrogen-rich needles behind during WTH. In a changed climate, organic-matter decomposition and nitrogen mineralization accelerated and tree growth was enhanced, increasing the carbon stock of trees and slightly decreasing the soil carbon stock. In the changed climate, WTH had less influence on forest growth and a similar influence on soil carbon sequestration than in the current climate. In the current climate, the WTH decreased the forest carbon stock by, on average, 26.8 Mg C·ha−1 over the rotation period. If harvested forest residues are used for energy production instead of fossil fuels, emissions decline by 19 Mg C·ha−1 (when WTH is applied over a rotation period). Thus, our analysis suggests that using forest residues for energy production leads to a net increase in carbon emissions.

scholarly journals Perubahan kondisi biofisik-kimia lahan akibat pembangunan kanal pada areal IUPHHBK-HA (Sagu) PT. Austindo Nusantara Jaya Agri Papua di Kabupaten Sorong Selatan

Cassowary ◽  
2018 ◽  
Vol 1 (2) ◽  
pp. 103-120
Author(s):  
Reynold Kesaulija ◽  
Nurhaida Sinaga ◽  
Max J. Tokede
Keyword(s):  
Carbon Dioxide ◽  
Soil Carbon ◽  
Carbon Stock ◽  
Stand Structure ◽  
Soil Layer ◽  
Organic Content ◽  
Primary Data ◽  
Mature Trees ◽  
Soil Carbon Stock ◽  
The Impact

The constructions of canals for water use and management as well as supporting activities of productions, transportation and firebreaks lines are expected to have an impact on the biophysical and chemical changes in construction land. Therefore, the aims of this research are to know the amount of vegetation lost due to land clearing for canal constructions, land biophysical-chemical conditions changed as a result of canal clearing, aboveground carbon dioxide estimation and soil carbon stock estimation. Primary data collection determined by purposive on canal line for stand structure and composition, along with soil carbon estimation. The results showed that the opening of canal area of 82,35 ha will result in the loss of 19.866 sago trees on 40 cm average in diameter and 3.642 mature trees. Thus, sago starch on 82,35 ha will lost as much as 637,27 tons or 637.265,48 kg. Changes in land biophysical-chemical due to canal constructions are habitat fragmentation, increase in soil erosion, land slide of canal wall, changes in water quality particularly solid suspension total as a direct impact to increased turbidity, sedimentation, and siltation of canals. Furthermore, the impact of 82,35 ha canal construction was increasing of carbon dioxide (CO2) emission as much as 38.716,48 ton, and it is estimated that it will increase in line with future canal construction. Based on soil bulk density ranging from 0,58 to 1.22 g/cm3 and Carbon-organic content ranging from 16.65 to 54,16 %, it is estimated that carbon stock on 0 to 30 cm soil layer on 1 Ha area will be lost as 109 ton.

Sustainable Management of Soil for Carbon Sequestration

2017 ◽  
Vol 5 (2) ◽  
pp. 132-140 ◽  
Author(s):  
Kewat Sanjay Kumar ◽  
Keyword(s):  
Carbon Sequestration ◽  
Soil Carbon ◽  
Sustainable Management ◽  
Management Practices ◽  
Atmospheric Co2 ◽  
Carbon Pools ◽  
Carbon Stabilization ◽  
Organic C ◽  
Soil Ecosystems ◽  
C Stocks

Mechanisms governing carbon stabilization in soils have received a great deal of attention in recent years due to their relevance in the global carbon cycle. Two thirds of the global terrestrial organic C stocks in ecosystems are stored in below ground components as terrestrial carbon pools in soils. Furthermore, mean residence time of soil organic carbon pools have slowest turnover rates in terrestrial ecosystems and thus there is vast potential to sequester atmospheric CO2 in soil ecosystems. Depending upon soil management practices it can be served as source or sink for atmospheric CO2. Sustainable management systems and practices such as conservation agriculture, agroforestry and application of biochar are emerging and promising tools for soil carbon sequestration. Increasing soil carbon storage in a system simultaneously improves the soil health by increase in infiltration rate, soil biota and fertility, nutrient cycling and decrease in soil erosion process, soil compaction and C emissions. Henceforth, it is vital to scientifically explore the mechanisms governing C flux in soils which is poorly understood in different ecosystems under anthropogenic interventions making soil as a potential sink for atmospheric CO2 to mitigate climate change. Henceforth, present paper aims to review basic mechanism governing carbon stabilization in soils and new practices and technological developments in agricultural and forest sciences for C sequestration in terrestrial soil ecosystems.

Sign in / Sign up

Export Citation Format

Share Document