Soil microbial biomass nitrogen and β-glucosaminidase activity response to surface compaction and poultry-litter application in a claypan soil

2011 ◽  
Vol 51 ◽  
pp. 79-86 ◽  
Author(s):  
P. Pengthamkeerati ◽  
P.P. Motavalli ◽  
R.J. Kremer
Keyword(s):  
Microbial Biomass ◽  
Soil Microbial Biomass ◽  
Poultry Litter ◽  
Microbial Biomass Nitrogen ◽  
Soil Microbial ◽  
Activity Response ◽  
Claypan Soil ◽  
Soil Microbial Biomass Nitrogen

scholarly journals Impact of cadmium and lead on soil microbial biomass nitrogen of the botanical garden of ahmadu bello university, Zaria, Nigeria

2018 ◽  
Vol 3 (3) ◽  
pp. 94-97
Author(s):  
Oijagbe IJ ◽  
Abubakar BY ◽  
Edogbanya PRO
Keyword(s):  
Microbial Biomass ◽  
Room Temperature ◽  
Soil Microbial Biomass ◽  
Botanical Garden ◽  
Soil Samples ◽  
Microbial Biomass Nitrogen ◽  
Soil Microbial ◽  
Soil Microbial Biomass Nitrogen ◽  
Cadmium And Lead ◽  
Chloride Salts

This study is aimed at evaluating the effect of heavy metals on soil microbial processes. The effects of Lead (Pb) and Cadmium (Cd) at different concentrations were investigated over a period of eight weeks. Chloride salts of Pb and Cd were added singly and in combination to soil samples at room temperature (27°C) in different polythene bags. Samples were taken from the bags at two weeks interval and measurements were taken of the rate of microbial biomass nitrogen (MBN). The results showed that there was a significant decrease in the microbial biomass for all treated soils from the second week to the sixth week. But there was an observed increase in microbial biomass Nitrogen on the eight week. On the 6thweek, 40mgkg-1Cd gave the most significant decrease (16µg/g) and 1000mgkg-1 Pb gave the least significant decrease (70µg/g) of MBN.

scholarly journals Pesticides effect on soil microbial ecology and enzyme activity- An overview

2016 ◽  
Vol 8 (2) ◽  
pp. 1126-1132 ◽  
Author(s):  
Sanjay Arora ◽  
Divya Sahni
Keyword(s):  
Microbial Biomass ◽  
Soil Microbial Biomass ◽  
Soil Microbes ◽  
Microbial Biomass Carbon ◽  
Soil Microbial Communities ◽  
Field Application ◽  
Microbial Biomass C ◽  
Microbial Biomass Nitrogen ◽  
Soil Microbial ◽  
Chemical Pesticides

In modern agriculture, chemical pesticides are frequently used in agricultural fields to increase crop production. Besides combating insect pests, these insecticides also affect the activity and population of beneficial soil microbial communities. Chemical pesticides upset the activities of soil microbes and thus may affect the nutritional quality of soils. This results in serious ecological consequences. Soil microbes had different response to different pesticides. Soil microbial biomass that plays an important role in the soil ecosystem where they have crucial role in nutrient cycling. It has been reported that field application of glyphosate increased microbial biomass carbon by 17% and microbial biomass nitrogen by 76% in nine soils at 14 days after treatment. The soil microbial biomass C increased significantly upto 30 days in chlorpyrifos as well as cartap hydrochloride treated soil, but thereafter decreased progressively with time. Soil nematodes, earthworms and protozoa are affected by field application rates of the fungicide fenpropimorph and other herbicides. Thus, there is need to assess the effect of indiscriminate use of pesticides on soil microorganisms, affecting microbial activity and soil fertility.

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