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Jingkuan Wang - One of the best experts on this subject based on the ideXlab platform.
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Dynamics of maize carbon contribution to soil organic carbon in association with soil type and fertility level.
PloS one, 2015Co-Authors: Jiubo Pei, John Farmer, Jingkuan WangAbstract:Soil type and fertility level influence straw carbon dynamics in the agroecosystems. However, there is a limited understanding of the dynamic processes of straw-derived and soil-derived carbon and the influence of the addition of straw carbon on soil-derived organic carbon in different soils associated with different fertility levels. In this study, we applied the in-situ carborundum tube method and 13C-labeled maize straw (with and without maize straw) at two cropland (Phaeozem and Luvisol soils) experimental sites in northeast China to quantify the dynamics of maize-derived and soil-derived carbon in soils associated with high and low fertility, and to examine how the addition of maize carbon influences soil-derived organic carbon and the interactions of soil type and fertility level with maize-derived and soil-derived carbon. We found that, on average, the contributions of maize-derived carbon to total organic carbon in maize-soil systems during the experimental period were differentiated among low fertility Luvisol (from 62.82% to 42.90), high fertility Luvisol (from 53.15% to 30.00%), low fertility Phaeozem (from 58.69% to 36.29%) and high fertility Phaeozem (from 41.06% to 16.60%). Furthermore, the addition of maize carbon significantly decreased the remaining soil-derived organic carbon in low and high fertility Luvisols and low fertility Phaeozem before two months. However, the increasing differences in soil-derived organic carbon between both soils with and without maize straw after two months suggested that maize-derived carbon was incorporated into soil-derived organic carbon, thereby potentially offsetting the loss of soil-derived organic carbon. These results suggested that Phaeozem and high fertility level soils would fix more maize carbon over time and thus were more beneficial for protecting soil-derived organic carbon from maize carbon decomposition.
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Dynamic patterns of total organic carbon content (TOC) and δ13C signature.
2015Co-Authors: Jiubo Pei, John Farmer, Jingkuan WangAbstract:Data expressed as the means ± SD (n = 3). L-LV+m, low fertility Luvisol plus maize straw; H-LV+m, high fertility Luvisol plus maize straw; L-PH+m, low fertility Phaeozem plus maize straw; H-PH+m, high fertility Phaeozem plus maize straw; L-LV, low fertility Luvisol; H-LV, high fertility Luvisol; L-PH, low fertility Phaeozem; and H-PH, high fertility Phaeozem.
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Remaining rates of total organic carbon (A), maize-derived carbon (B), soil-derived organic carbon in the treatments without (C) and with (D) maize straw.
2015Co-Authors: Jiubo Pei, John Farmer, Jingkuan WangAbstract:Data expressed as the means ± SD (n = 3). rSM, remaining rate of total organic carbon in the treatment with maize straw; rM, remaining rate of maize-derived carbon in the treatment with maize straw;rS′, remaining rate of soil-derived organic carbon in the treatment without maize straw; rS, remaining rate of soil-derived organic carbon in the treatment with maize straw; L-LV+m, low fertility Luvisol plus maize straw; H-LV+m, high fertility Luvisol plus maize straw; L-PH+m, low fertility Phaeozem plus maize straw; H-PH+m, high fertility Phaeozem plus maize straw; L-LV, low fertility Luvisol; H-LV, high fertility Luvisol; L-PH, low fertility Phaeozem; and H-PH, high fertility Phaeozem.
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Dynamic patterns of total nitrogen (TN) and C/N ratio in the treatments with maize straw.
2015Co-Authors: Jiubo Pei, John Farmer, Jingkuan WangAbstract:Data expressed as the means ± SD (n = 3). L-LV+m, low fertility Luvisol plus maize straw; H-LV+m, high fertility Luvisol plus maize straw; L-PH+m, low fertility Phaeozem plus maize straw; and H-PH+m, high fertility Phaeozem plus maize straw.
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Differences in soil-derived organic carbon between the treatments with and without maize straw.
2015Co-Authors: Jiubo Pei, John Farmer, Jingkuan WangAbstract:Data expressed as the means ± SD (n = 3). ΔCS, difference of soil-derived organic carbon between the treatment with and without maize straw. L-LV, low fertility Luvisol; H-LV, high fertility Luvisol; L-PH, low fertility Phaeozem; and H-PH, high fertility Phaeozem.
Jiubo Pei - One of the best experts on this subject based on the ideXlab platform.
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RESEARCH ARTICLE Dynamics of Maize Carbon Contribution to Soil Organic Carbon in Association with Soil Type and Fertility Level
2016Co-Authors: Jiubo Pei, John FarmerAbstract:Soil type and fertility level influence straw carbon dynamics in the agroecosystems. Howev-er, there is a limited understanding of the dynamic processes of straw-derived and soil-de-rived carbon and the influence of the addition of straw carbon on soil-derived organic carbon in different soils associated with different fertility levels. In this study, we applied the in-situ carborundum tube method and 13C-labeled maize straw (with and without maize straw) at two cropland (Phaeozem and Luvisol soils) experimental sites in northeast China to quantify the dynamics of maize-derived and soil-derived carbon in soils associated with high and low fertility, and to examine how the addition of maize carbon influences soil-de-rived organic carbon and the interactions of soil type and fertility level with maize-derived and soil-derived carbon. We found that, on average, the contributions of maize-derived car-bon to total organic carbon in maize-soil systems during the experimental period were differ-entiated among low fertility Luvisol (from 62.82 % to 42.90), high fertility Luvisol (from 53.15 % to 30.00%), low fertility Phaeozem (from 58.69 % to 36.29%) and high fertility Phaeozem (from 41.06 % to 16.60%). Furthermore, the addition of maize carbon significant-ly decreased the remaining soil-derived organic carbon in low and high fertility Luvisols and low fertility Phaeozem before two months. However, the increasing differences in soil-de-rived organic carbon between both soils with and without maize straw after two months sug-gested that maize-derived carbon was incorporated into soil-derived organic carbon, thereby potentially offsetting the loss of soil-derived organic carbon. These results sug-gested that Phaeozem and high fertility level soils would fix more maize carbon over time and thus were more beneficial for protecting soil-derived organic carbon from maize carbon decomposition
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Dynamics of maize carbon contribution to soil organic carbon in association with soil type and fertility level.
PloS one, 2015Co-Authors: Jiubo Pei, John Farmer, Jingkuan WangAbstract:Soil type and fertility level influence straw carbon dynamics in the agroecosystems. However, there is a limited understanding of the dynamic processes of straw-derived and soil-derived carbon and the influence of the addition of straw carbon on soil-derived organic carbon in different soils associated with different fertility levels. In this study, we applied the in-situ carborundum tube method and 13C-labeled maize straw (with and without maize straw) at two cropland (Phaeozem and Luvisol soils) experimental sites in northeast China to quantify the dynamics of maize-derived and soil-derived carbon in soils associated with high and low fertility, and to examine how the addition of maize carbon influences soil-derived organic carbon and the interactions of soil type and fertility level with maize-derived and soil-derived carbon. We found that, on average, the contributions of maize-derived carbon to total organic carbon in maize-soil systems during the experimental period were differentiated among low fertility Luvisol (from 62.82% to 42.90), high fertility Luvisol (from 53.15% to 30.00%), low fertility Phaeozem (from 58.69% to 36.29%) and high fertility Phaeozem (from 41.06% to 16.60%). Furthermore, the addition of maize carbon significantly decreased the remaining soil-derived organic carbon in low and high fertility Luvisols and low fertility Phaeozem before two months. However, the increasing differences in soil-derived organic carbon between both soils with and without maize straw after two months suggested that maize-derived carbon was incorporated into soil-derived organic carbon, thereby potentially offsetting the loss of soil-derived organic carbon. These results suggested that Phaeozem and high fertility level soils would fix more maize carbon over time and thus were more beneficial for protecting soil-derived organic carbon from maize carbon decomposition.
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Dynamic patterns of total organic carbon content (TOC) and δ13C signature.
2015Co-Authors: Jiubo Pei, John Farmer, Jingkuan WangAbstract:Data expressed as the means ± SD (n = 3). L-LV+m, low fertility Luvisol plus maize straw; H-LV+m, high fertility Luvisol plus maize straw; L-PH+m, low fertility Phaeozem plus maize straw; H-PH+m, high fertility Phaeozem plus maize straw; L-LV, low fertility Luvisol; H-LV, high fertility Luvisol; L-PH, low fertility Phaeozem; and H-PH, high fertility Phaeozem.
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Remaining rates of total organic carbon (A), maize-derived carbon (B), soil-derived organic carbon in the treatments without (C) and with (D) maize straw.
2015Co-Authors: Jiubo Pei, John Farmer, Jingkuan WangAbstract:Data expressed as the means ± SD (n = 3). rSM, remaining rate of total organic carbon in the treatment with maize straw; rM, remaining rate of maize-derived carbon in the treatment with maize straw;rS′, remaining rate of soil-derived organic carbon in the treatment without maize straw; rS, remaining rate of soil-derived organic carbon in the treatment with maize straw; L-LV+m, low fertility Luvisol plus maize straw; H-LV+m, high fertility Luvisol plus maize straw; L-PH+m, low fertility Phaeozem plus maize straw; H-PH+m, high fertility Phaeozem plus maize straw; L-LV, low fertility Luvisol; H-LV, high fertility Luvisol; L-PH, low fertility Phaeozem; and H-PH, high fertility Phaeozem.
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Dynamic patterns of total nitrogen (TN) and C/N ratio in the treatments with maize straw.
2015Co-Authors: Jiubo Pei, John Farmer, Jingkuan WangAbstract:Data expressed as the means ± SD (n = 3). L-LV+m, low fertility Luvisol plus maize straw; H-LV+m, high fertility Luvisol plus maize straw; L-PH+m, low fertility Phaeozem plus maize straw; and H-PH+m, high fertility Phaeozem plus maize straw.
Qixing Zhou - One of the best experts on this subject based on the ideXlab platform.
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adsorption and desorption of carbendazim and cadmium in typical soils in northeastern china as affected by temperature
Geoderma, 2011Co-Authors: Xuhui Li, Qixing ZhouAbstract:Abstract The adsorption and desorption of carbendazim and cadmium (Cd) in soils (burozem and Phaeozem) typically distributed in northeastern China were investigated at two different temperatures, 25 and 40 °C. The effects of interaction between carbendazim and Cd on their adsorption and desorption were also discussed. The results showed that the adsorption of carbendazim was exothermic with ΔH Θ values of − 5.3 kJ/mol for burozem and − 33.6 kJ/mol for Phaeozem, while the adsorption of Cd was endothermic with ΔH Θ values of 43.2 and 37.4 kJ/mol, respectively. Increasing the temperature from 25 °C to 40 °C could promote the desorption hysteresis of carbendazim, but decreased the desorption hysteresis of Cd. The coexistence of carbendazim and Cd promoted the adsorption of carbendazim but suppressed the adsorption of Cd and the effect was amplified as the temperature increased to 40 °C. The adsorption amount of carbendazim at 25 °C increased 11% for burozem and 4% for Phaeozem respectively when the concentration of Cd was 50 mg/L. This increased to 56% and 20% respectively when the temperature was increased to 40 °C. When the concentration of carbendazim was 30 mg/L, the amount of Cd adsorption decreased 13% for burozem and 5% for Phaeozem at 25 °C, and 33% and 14% at 40 °C, respectively.
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ecological detoxification of methamidophos by earthworms in phaiozem co contaminated with acetochlor and copper
Applied Soil Ecology, 2008Co-Authors: Meie Wang, Qixing Zhou, Jidong LiangAbstract:In view of the ubiquitous co-existence of methamidophos, acetochlor and copper (Cu) in agricultural soils, ecological detoxification of methamidophos in phaiozem by earthworms was examined using the detoxic incubation experiments with illumination. It was validated that the earthworm Eisenia fetida is a useful soil animal in the process of methamidophos detoxification as the assistance of soil microbes and enzymes. Due to the action of earthworms, the half life of methamidophos with concentration of 15 mg/kg in phaiozem could decrease from 5.61 days to 5.08 days. Dynamics of methamidophos detoxification by earthworms could conform to the logistic model. Under the condition of multiple pollution combined with acetochlor (20 mg/kg) and Cu (300 mg/kg), ecological detoxification of methamidophos by earthworms became complicated. Acetochlor played a promoting role in the biodegradation of methamidophos to some extent, while it was basically inhibited by Cu.
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Combined ecological effects of acetochlor and copper sulphate on microorganisms in Phaeozem
Huan jing ke xue= Huanjing kexue, 2007Co-Authors: Qianru Zhang, Qixing Zhou, Huiwen ZhangAbstract:In order to explore the combined ecological effects of acetochlor and copper sulphate on soil microorganisms, the traditional toxicological methods and BIOLOG were employed. The results indicate that the combined application of acetochlor and copper sulphate has acute inhibitory effects on the amount of culture-dependent viable bacteria, actinomycetes and fungi as well as soil dehydrogenase activity. These effects are gradually weakened and even reverse with the increase of exposure time. The change of the substrate-induced respiration (SIR) is significantly increased under the combined stress. The data of BIOLOG are subjected to the principle component analysis (PCA) and three index models such as Shannon, Simpson and McIntosh indexes. The results also indicate that the combined application of acetochlor and copper sulphate can destroy the richness and evenness of microbial community diversity in Phaeozem. The changes of carbon utilization diversity of Phaeozem microbial community are also showed by the pattern of PCA.
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toxic effects of acetochlor and methamidophos on earthworm eisenia fetida in phaiozem northeast china
Journal of Environmental Sciences-china, 2006Co-Authors: Qixing Zhou, Qianru Zhang, Jidong LiangAbstract:Acetochlor and methamidophos are two important agrochemicals which are widely applied to agricultural production in northeast China. The investigation on the earthworm Eisenia fetida as an important type of soil animals exposed to single and binary-combined contamination of acetochlor and methamidophos was thus carried out. The single toxic effect test showed that the two agrochemicals had their toxicity to the earthworms living in phaiozem. Acetochlor had a stronger acute toxic effect on the earthworms than methamidophos. The mortality of the earthworms exposed to individual acetochlor and methamidophos changed with an increase in the exposure time and the exposed concentrations. The LD50 value of acetochlor and methamidophos toxic to the earthworms was 115.6-275.3 and 29.5-228.6 mg/kg, respectively. The weight of the earthworms was a more sensitive index compared to the mortality in indicating toxic effects of acetochlor and methamidophos in phaiozem. When considering both the mortality and the body-weight change, the combined pollution of acetochlor and methamidophos in phaiozem resulted in their synergic toxic effects on the earthworms.
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Comparison on desorptive behavior of cadmium in Phaeozem and burozem
Huan jing ke xue= Huanjing kexue, 2006Co-Authors: Guanlin Guo, Qixing ZhouAbstract:Desorptive behavior of Cd2+ was comparatively studied by the batch method on the two typical soils in northeast China. The results indicated that the two soils exhibit statistically significant sorption-desorption hysteresis. Phaeozem has a longer hysteresis period than the Burozem. The desorptive behavior of Cd2+ in the two tested soils was a rapid reactions, which could account for 90% of the Cd2+ equilibrium desorption within the first 30 min. Compared with the total adsorption, the desorptive percentage of the adsorped Cd2+ in the Phaeozem and burozem was in a low extent, which was ranged within rate of 9.0% and 15.1% respectively. The desorptive rates of Cd2+ in the soils were increased with the higher concentrations of Cd2+ in the treatments, and decreased with the increasing desorptive amount and time. Soil properties had no significant effect on the desorptive rate decreasing. Freundlich equation was the optimal model to describe the desorptive isotherm of Cd2+, while the Elovich equation was the best model to describe Cd2+ desorption kinetics in the two soils.
John Farmer - One of the best experts on this subject based on the ideXlab platform.
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RESEARCH ARTICLE Dynamics of Maize Carbon Contribution to Soil Organic Carbon in Association with Soil Type and Fertility Level
2016Co-Authors: Jiubo Pei, John FarmerAbstract:Soil type and fertility level influence straw carbon dynamics in the agroecosystems. Howev-er, there is a limited understanding of the dynamic processes of straw-derived and soil-de-rived carbon and the influence of the addition of straw carbon on soil-derived organic carbon in different soils associated with different fertility levels. In this study, we applied the in-situ carborundum tube method and 13C-labeled maize straw (with and without maize straw) at two cropland (Phaeozem and Luvisol soils) experimental sites in northeast China to quantify the dynamics of maize-derived and soil-derived carbon in soils associated with high and low fertility, and to examine how the addition of maize carbon influences soil-de-rived organic carbon and the interactions of soil type and fertility level with maize-derived and soil-derived carbon. We found that, on average, the contributions of maize-derived car-bon to total organic carbon in maize-soil systems during the experimental period were differ-entiated among low fertility Luvisol (from 62.82 % to 42.90), high fertility Luvisol (from 53.15 % to 30.00%), low fertility Phaeozem (from 58.69 % to 36.29%) and high fertility Phaeozem (from 41.06 % to 16.60%). Furthermore, the addition of maize carbon significant-ly decreased the remaining soil-derived organic carbon in low and high fertility Luvisols and low fertility Phaeozem before two months. However, the increasing differences in soil-de-rived organic carbon between both soils with and without maize straw after two months sug-gested that maize-derived carbon was incorporated into soil-derived organic carbon, thereby potentially offsetting the loss of soil-derived organic carbon. These results sug-gested that Phaeozem and high fertility level soils would fix more maize carbon over time and thus were more beneficial for protecting soil-derived organic carbon from maize carbon decomposition
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Dynamics of maize carbon contribution to soil organic carbon in association with soil type and fertility level.
PloS one, 2015Co-Authors: Jiubo Pei, John Farmer, Jingkuan WangAbstract:Soil type and fertility level influence straw carbon dynamics in the agroecosystems. However, there is a limited understanding of the dynamic processes of straw-derived and soil-derived carbon and the influence of the addition of straw carbon on soil-derived organic carbon in different soils associated with different fertility levels. In this study, we applied the in-situ carborundum tube method and 13C-labeled maize straw (with and without maize straw) at two cropland (Phaeozem and Luvisol soils) experimental sites in northeast China to quantify the dynamics of maize-derived and soil-derived carbon in soils associated with high and low fertility, and to examine how the addition of maize carbon influences soil-derived organic carbon and the interactions of soil type and fertility level with maize-derived and soil-derived carbon. We found that, on average, the contributions of maize-derived carbon to total organic carbon in maize-soil systems during the experimental period were differentiated among low fertility Luvisol (from 62.82% to 42.90), high fertility Luvisol (from 53.15% to 30.00%), low fertility Phaeozem (from 58.69% to 36.29%) and high fertility Phaeozem (from 41.06% to 16.60%). Furthermore, the addition of maize carbon significantly decreased the remaining soil-derived organic carbon in low and high fertility Luvisols and low fertility Phaeozem before two months. However, the increasing differences in soil-derived organic carbon between both soils with and without maize straw after two months suggested that maize-derived carbon was incorporated into soil-derived organic carbon, thereby potentially offsetting the loss of soil-derived organic carbon. These results suggested that Phaeozem and high fertility level soils would fix more maize carbon over time and thus were more beneficial for protecting soil-derived organic carbon from maize carbon decomposition.
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Dynamic patterns of total organic carbon content (TOC) and δ13C signature.
2015Co-Authors: Jiubo Pei, John Farmer, Jingkuan WangAbstract:Data expressed as the means ± SD (n = 3). L-LV+m, low fertility Luvisol plus maize straw; H-LV+m, high fertility Luvisol plus maize straw; L-PH+m, low fertility Phaeozem plus maize straw; H-PH+m, high fertility Phaeozem plus maize straw; L-LV, low fertility Luvisol; H-LV, high fertility Luvisol; L-PH, low fertility Phaeozem; and H-PH, high fertility Phaeozem.
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Remaining rates of total organic carbon (A), maize-derived carbon (B), soil-derived organic carbon in the treatments without (C) and with (D) maize straw.
2015Co-Authors: Jiubo Pei, John Farmer, Jingkuan WangAbstract:Data expressed as the means ± SD (n = 3). rSM, remaining rate of total organic carbon in the treatment with maize straw; rM, remaining rate of maize-derived carbon in the treatment with maize straw;rS′, remaining rate of soil-derived organic carbon in the treatment without maize straw; rS, remaining rate of soil-derived organic carbon in the treatment with maize straw; L-LV+m, low fertility Luvisol plus maize straw; H-LV+m, high fertility Luvisol plus maize straw; L-PH+m, low fertility Phaeozem plus maize straw; H-PH+m, high fertility Phaeozem plus maize straw; L-LV, low fertility Luvisol; H-LV, high fertility Luvisol; L-PH, low fertility Phaeozem; and H-PH, high fertility Phaeozem.
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Dynamic patterns of total nitrogen (TN) and C/N ratio in the treatments with maize straw.
2015Co-Authors: Jiubo Pei, John Farmer, Jingkuan WangAbstract:Data expressed as the means ± SD (n = 3). L-LV+m, low fertility Luvisol plus maize straw; H-LV+m, high fertility Luvisol plus maize straw; L-PH+m, low fertility Phaeozem plus maize straw; and H-PH+m, high fertility Phaeozem plus maize straw.
E. Wilczewski - One of the best experts on this subject based on the ideXlab platform.
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Spatial Differentiation of Total Nitrogen Content and the Activity of n-transforming Enzymes in a Soil
Ecological Chemistry and Engineering. A, 2013Co-Authors: A. Piotrowska-długosz, M. Rybacki, J. Długosz, M. Kobierski, E. WilczewskiAbstract:The objective of this study was to evaluate and compare the spatial differentiation of total N (NTOT) content and urease (UR), nitrate reductase (NR) and arginine deaminase (ADA) activities in the surface horizon of Luvisol and Phaeozem of the Pomerania and Cuiavia region. 50 soil samples from both study areas were collected in April 2007 in a square sampling grid (90 × 40 m). The results were evaluated with the use of geostatistical methods. Spatial variability of the investigated parameters was evaluated by using empirical semivariograms with adjusted theoretical mathematical model of variograms. Raster maps of the studied properties were drawn. The concentration of chemical properties (TN, TOC, pHKCl) and the activity of UR and ADA was significantly higher in Phaeozem compared to Luvisol. Only the nitrate reductase activity was similar in samples of both types of soils. To characterise the spatial variability of the properties studied, spherical or mixed (spherical/linear) models with or without the nugget effect (only NR activity in Luvisol), were fitted to the calculated semivariograms. Total N content, NR activity in Phaeozem and ADA activity in Luvisol were in the strong variability class (the nugget effect < 25 %), while UR activity in both soil types and ADA activity in Phaeozem were situated in the moderate variability class (the nugget effect between 25 and 75 %). The ranges of influence calculated for properties studied ranged from 9.0 to 17 m. The raster maps showed that the distribution of each variable had a different pattern on the area studied. A specific variable was distributed in both topsoils in a different way.
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SPATIAL DIFFERENTIATION OF TOTAL NITROGEN CONTENT AND THE ACTIVITY OF N-TRANSFORMING ENZYMES IN A SOIL ZRÓ¯NICOWANIE PRZESTRZENNE ZAWARTOŒCI AZOTU OGÓ£EM ORAZ AKTYWNOŒCI ENZYMÓW PRZEMIAN AZOTU W GLEBIE
2013Co-Authors: Anna Piotrowska-d, E. WilczewskiAbstract:The objective of this study was to evaluate and compare the spatial differentiation of total N (NTOT) content and urease (UR), nitrate reductase (NR) and arginine deaminase (ADA) activities in the surface horizon of Luvisol and Phaeozem of the Pomerania and Cuiavia region. 50 soil samples from both study areas were collected in April 2007 in a square sampling grid (90 × 40 m). The results were evaluated with the use of geostatistical methods. Spatial variability of the investigated parameters was evaluated by using empirical semivariograms with adjusted theoretical mathematical model of variograms. Raster maps of the studied properties were drawn. The concentration of chemical properties (TN, TOC, pHKCl) and the activity of UR and ADA was significantly higher in Phaeozem compared to Luvisol. Only the nitrate reductase activity was similar in samples of both types of soils. To characterise the spatial variability of the properties studied, spherical or mixed (spherical/linear) models with or without the nugget effect (only NR activity in Luvisol), were fitted to the calculated semivariograms. Total N content, NR activity in Phaeozem and ADA activity in Luvisol were in the strong variability class (the nugget effect < 25 %), while UR activity in both soil types and ADA activity in Phaeozem were situated in the moderate variability class (the nugget effect between 25 and 75 %). The ranges of influence calculated for properties studied ranged from 9.0 to 17 m. The raster maps showed that the distribution of each variable had a different pattern on the area studied. A specific variable was distributed in both topsoils in a different way.