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Effects of different farming patterns on soil organic carbon distribution in profile and oxidation stability in purple paddy soil of long term experiment site (since 1990) were studied. Results showed that the content of soil organic carbon (SOC) decreased gradually with the increase in depth among different kind of treatments. The SOC content, reaching 20.69 g kg−1, in 0–10 cm soil layer with the...
As the national survey of pollution sources revealed, the proportion of agricultural pollution has increased, and the problems of rural eco-environment should arouse wide concern. As a major agricultural province, the current situation of rural eco-environment is far from optimism, which has restricted the sustainable development of rural economy, society and environment. To change this situation,...
Surface soil samples (0∼20cm) were collected from a Calamagrostis angustifolia freshwater marsh in the Sanjiang Plain from May to September and soil active organic carbon including microbial biomass carbon (MBC), easily oxidizable carbon (EOC), dissolved organic carbon (DOC) were analyzed aiming to reveal their seasonal dynamics characterisitics and their correlationships with activities of soil invertase,...
The annual amount of carbon dioxide (CO2) assimilated by orange orchards in subtropical region, China is more than 20% of total Chinese forest ecosystems. However, the studies on soil carbon pool in these orchards are rarely reported, especially in hilly red soil region, southern China. Carbon contents in bulk, rhizosphere and non-rhizosphere soils at 0–15 cm, 15–30 cm and 30–45 cm depths were measured...
Methane (CH4) emission data showed large temporal and spatial variation ranging from 0 to 249.3 mg CH4 m−2 h−1. Results indicated that the highest CH4 flux rate was obtained in growth seasons. The polyculture system and Zizania latifolia has the higher potential of global warming. Methane fluxes have a remarkable seasonal and temporal variability in vegetation systems resulting from variation in the...
The global warming is mainly caused by the rapid rise of greenhouse gas concentrations in the atmosphere. To reverse the trend, the world resorts to the low-carbon economy. The agricultural ecosystem, the largest artificial ecosystem ever seen in the world, is the second largest source of greenhouse gas emission, establishing the close relation between the agriculture-related activities and global...
The estimation of soil organic carbon(SOC) densities and dynamics is necessary to understand terrestrial carbon cycle and carbon budget. The relative research on the Tibetan Plateau was few and uncertainty of the SOC densities and dynamics. The dynamics of soil organic carbon and its fractions, including active, slow and passive pools, were simulated using CENTURY model in alpine meadow at Damxung...
This paper analyzes that wetland ecosystem plays a key rules in absorbing carbon dioxide, such as Scirpus mariqueter, Phragmites australis and Spartina. The result proves that the wetland is a tremendous carbon pool without human disturbing. For the above mentioned, some measures, approaches and potential advantages are put forward in this paper so that the relevant government departments constitute...
Coal mining not only destroyed the ecological balance and the output capacity of the land, but also seriously disturbed the balance of effects of mining of the carbon. Geographical conditions, climate, coal mining methods, ecological damage are the major factors which effect the coal mining areas in the carbon. Coal mining areas from a macro perspective by considering the carbon-carbon effects of...
Biosolid (BS) contains nutrients, organic matters, and microorganisms that are beneficial in facilitating the remediation of soil contaminated by polycyclic aromatic hydrocarbons (PAHs). In this study, BS applied to toluene and naphthalene-contaminated soils to investigate its effect on the enhancement of the biodegradation rate and removal efficiency. Experimental results indicated that the presence...
This paper studied organic carbon content, water content, pH value, available nitrogen content and available phosphorus content in different soil depths, and explored the correlations between organic carbon content and water content, pH value, available nitrogen content, or available phosphorus content of three typical soils (subalpine meadow soil, turfy meadow soil and alluvial soil) in Hongyuan...
Simulated experiments were conducted to study the eco-toxicology effects of perchloroethylene (PCE) pollutant on three main soil enzyme activities: protease, urease and catalase. The results showed that, increasing the initial PCE concentration resulted in higher inhibition effect on both protease and urease activities. The process was inhibited firstly and then recovered. PCE had a significant inhibition...
Artificial vegetation is an important biological component to absorb carbon dioxide for ecosystem health. The artificial carbon sink forest plays an important role in carbon emission reduction. Based on data of Landsat TM in August, 2009, the ecological landscape pattern of artificial forest in Karamay is obtained. Furthermore, using NDVI and soil sapling date to estimate carbon density. i.e, depending...
The greater hinggan mountains in China is the green treasure, containing enormous economic, ecological and social benefits. However, due to the years of unreasonable deforestation structure, gradual degradation of the forest function and forest ecological environment hinders the mountains' development. Speed up constructing the mountains' ecological function areas becomes the primary task of promoting...
The present study is the first report of the conversion of two simple polycyclic aromatic hydrocarbons, biphenyl and naphthalene, into the aliphatic polymer poly-β-hydroxybutyrate by a single bacterium. The bacterium we have identified as Sphing obium scionense sp. WP01T (=DSM19371T=ICMP 13533T) was originally isolated from contaminated soil containing oil residues and Pinus radiata sap and sawdust...
Ambient PM10 was sampled during September 17th, 2007 to September 23th, 2007 and during January 14th, 2008 to January 20th, 2008 at three sites (Tongshan animal hospital, Yellow River village and HuaiTa) in Xuzhou. The samples were analyzed for 16 metal elements (Na, K, Mg, Ca, Zn, Fe, Al, Si, Cu, Mn, Co, Pb, Cr, Ti, V and Ni), three anions, elemental carbon and organic carbon. Chemical mass balance...
Intensive agriculture is the only way to feed the projected 9 billion people on the planet (FAO, 2002) by the end of this century. Agriculture is a major contributor of 10-12% of total global anthropogenic Green House Gases (GHG) to the atmosphere, but the emissions vary depending on the land use and the way that the land is managed. Fertilizer, energy - and chemical-intensive farming also contribute...
An Unattended Detection method for monitoring the CO2 concentration in soil respiration is described. It is based on the gas pump and gas extraction with a dynamic air chamber assay, and the study of the relationship between data collected from on-line measurement of carbon dioxide and time, as well as the resistance to interfering. This method uses proposed utility line peak extraction method to...
Agricultural low-carbon economy as the embodiment of low-carbon economy in agriculture has been proposed in response to global climate change. This paper briefly introduced the function of carbon source and sink in agro-ecosystem. In order to develop agricultural low-carbon economy in China, the agricultural circular economy pattern should been actively explored, and the efficient and economic key...
The aim of this study was to access the pH and soil degradation. Soil samples collected in eleven zones among three locations by zone were analyzed in the laboratory through pH Meter and the results indicates that pH of all soil samples is less than 5 (pH<;5) and the general average was found to be 4.4. Heavy materials like Fe, Cu, Mn, and Zn presented a high concentration level. The elements H...
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