Mercury toxicity to Eisenia fetida in three different soils

2016 ◽  
Vol 24 (2) ◽  
pp. 1261-1269 ◽  
Author(s):  
Khandaker Rayhan Mahbub ◽  
Kannan Krishnan ◽  
Ravi Naidu ◽  
Mallavarapu Megharaj
Keyword(s):  
Eisenia Fetida ◽  
Mercury Toxicity ◽  
Different Soils

scholarly journals Toxicity Evaluation of Chlorpyrifos Metabolite 3,5,6-trichloro-2-pyridinol to Eisenia fetida in Different Soils

2021 ◽  
Author(s):  
Kaixuan Hou ◽  
Yue Yang ◽  
Lei Zhu ◽  
Ruolin Wu ◽  
Albert Juhasz ◽  
...  
Keyword(s):  
Eisenia Fetida ◽  
Oxygen Species ◽  
Exposure Group ◽  
Red Clay ◽  
Enzymes Activities ◽  
Soil Ecosystems ◽  
Exposure Biomarker ◽  
Biomarker Response ◽  
Response Method ◽  
Different Soils

Abstract The present study utilized a biomarker response method to evaluate the effect of 3,5,6-trichloro-2-pyridinol (TCP) in artificial and natural soils on Eisenia fetida after 7, 14, 28, 42 and 56 days exposure. Biomarker responses were standardized to calculate the Integrated Biomarker Response (IBR) index. The influence of soil type on TCP toxicity was assessed. Results indicated that TCP induced excessive reactive oxygen species, caused oxidative stress, DNA damage to earthworm, which is similar to its parent chemical chlorpyrifos. The IBR index of three enzymes activities showed that TCP induced the enzymes activities of earthworm in red clay was stronger than the other three soils. Specifically, chlorpyrifos exposure group showed a lower toxicity than TCP exposure group after 28 days exposure but a higher toxicity than TCP exposure group after 56 days exposure. Despite the deficiencies of this study, the above information is of great significance for assessing the risk of chlorpyrifos and its metabolite TCP pollution in soil ecosystems.

Ecotoxicity Evaluation of Azoxystrobin on Eisenia fetida in Different Soils

2021 ◽  
pp. 110705
Author(s):  
Yaqi Xu ◽  
Bing Li ◽  
Kaixuan Hou ◽  
Zhongkun Du ◽  
Samuel C. Allen ◽  
...  
Keyword(s):  
Eisenia Fetida ◽  
Different Soils

scholarly journals Toxicity Evaluation of Chlorpyrifos Metabolite 3,5,6-trichloro-2-pyridinol to Eisenia Fetida in Different Soils

2022 ◽  
Author(s):  
Kaixuan Hou ◽  
Yue Yang ◽  
Lei Zhu ◽  
Ruolin Wu ◽  
Zhongkun Du ◽  
...  
Keyword(s):  
Eisenia Fetida ◽  
Oxygen Species ◽  
Exposure Group ◽  
Toxicity Evaluation ◽  
Red Clay ◽  
Enzymes Activities ◽  
Soil Ecosystems ◽  
Biomarker Response ◽  
Response Method ◽  
Different Soils

Abstract The present study utilized a biomarker response method to evaluate the effect of 3,5,6-trichloro-2-pyridinol (TCP) in artificial and natural soils on Eisenia fetida after 7, 14, 28, 42 and 56 days exposure. Results indicated that TCP induced excessive reactive oxygen species, caused oxidative stress and DNA damage to Eisenia fetida. Biomarker responses were standardized to calculate the Integrated Biomarker Response (IBR) index. The IBR index of three enzymes activities showed that TCP induced the enzymes activities of earthworm in red clay was stronger than the other three soils. Specifically, chlorpyrifos exposure group showed a lower toxicity than TCP exposure group after 28 days exposure but a higher toxicity than TCP exposure group after 56 days exposure. Despite the deficiencies of this study, the above information is of great significance for assessing the risk of chlorpyrifos and its metabolite TCP pollution in soil ecosystems.

Water soluble nitrogen forms on two different soils as affected by biofertilization

2007 ◽  
Vol 35 (2) ◽  
pp. 597-600
Author(s):  
Ida Kincses ◽  
Tibor Filep ◽  
Péter Nagy ◽  
Andrea Kovács
Keyword(s):  
Water Soluble ◽  
Soluble Nitrogen ◽  
Nitrogen Forms ◽  
Different Soils

Energetic comparison of some stump-removing methods

2014 ◽  
Vol 10 (1) ◽  
pp. 35-51
Author(s):  
I. Czupy
Keyword(s):  
Alternative Energy ◽  
Fossil Fuel ◽  
Alternating Current ◽  
Above Ground Biomass ◽  
Alternative Energy Sources ◽  
Wide Domain ◽  
Fuel Substitution ◽  
Unused Resource ◽  
Root Connection ◽  
Different Soils

Concerns about climate change and fossil fuel shortages are encouraging interest in stumps, as alternative energy sources. Stumps are an almost unused resource in the context of bio fuels. Stump harvesting signifies an intensification of forest management compared with conventional stem-only or above-ground biomass-only harvesting. There are many benefits of stump harvesting. These include: the production of wood fuel, fossil fuel substitution, and improved soil preparation.Removing tree trunks in Hungary has been going on according to the principle of stump extraction, which means stumps are removed by grabbing technology. Experiments have been carried out to reduce the extraction force. In the Great Hungarian Lowland, where large areas require the operation implementation, stump extraction is done by special, hydraulic driven baggers equipped with a special bucket. During operation of the equipment, we carried out measurements of the extraction force and the time requirement. The experiments are designed to carry out the measurements with different soils and different tree species. According to our proposal the suitable force and torque required to remove stumps can be significantly reduced if before the lifting the soil — root connection is loosened. One of the possible ways to implement this task is the use of vibration. Since relatively great vibration power and wide domain of frequency are necessary, therefore we prepared the loosening machinery elements of alternating-current hydraulics system. Based on constructions variants we created a tractor-mounted experimental alternating-current hydraulic stump-loosening machine. It was designed with the ability to produce horizontal vibration in order to loosen stumps.

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