scholarly journals Soil microbial biomass and organic matter fractions during transition from conventional to organic farming systems

Geoderma ◽  
2012 ◽  
Vol 170 ◽  
pp. 227-231 ◽  
Author(s):  
Valdinar B. Santos ◽  
Ademir S.F. Araújo ◽  
Luiz F.C. Leite ◽  
Luís A.P.L. Nunes ◽  
Wanderley J. Melo
Keyword(s):  
Organic Matter ◽  
Microbial Biomass ◽  
Organic Farming ◽  
Soil Microbial Biomass ◽  
Farming Systems ◽  
Soil Microbial ◽  
Organic Farming Systems ◽  
Organic Matter Fractions

scholarly journals Response of soil microbial biomass and community structures to conventional and organic farming systems under identical crop rotations

2007 ◽  
Vol 61 (1) ◽  
pp. 26-37 ◽  
Author(s):  
Jürgen Esperschütz ◽  
Andreas Gattinger ◽  
Paul Mäder ◽  
Michael Schloter ◽  
Andreas Fließbach
Keyword(s):  
Microbial Biomass ◽  
Organic Farming ◽  
Soil Microbial Biomass ◽  
Farming Systems ◽  
Crop Rotations ◽  
Community Structures ◽  
Soil Microbial ◽  
Organic Farming Systems

Responses of soil microbial biomass and N availability to transition strategies from conventional to organic farming systems

2006 ◽  
Vol 113 (1-4) ◽  
pp. 206-215 ◽  
Author(s):  
Cong Tu ◽  
Frank J. Louws ◽  
Nancy G. Creamer ◽  
J. Paul Mueller ◽  
Cavell Brownie ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Organic Farming ◽  
Soil Microbial Biomass ◽  
Farming Systems ◽  
N Availability ◽  
Soil Microbial ◽  
Transition Strategies ◽  
Organic Farming Systems

scholarly journals Effect of Different Tillage Systems on Soil Organic Carbon and Enzymatic Activity

Agronomy ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 208
Author(s):  
Małgorzata Szostek ◽  
Ewa Szpunar-Krok ◽  
Renata Pawlak ◽  
Jadwiga Stanek-Tarkowska ◽  
Anna Ilek
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Organic Farming ◽  
Total Nitrogen ◽  
Farming Systems ◽  
Conventional Tillage ◽  
Tillage Systems ◽  
Organic Farming Systems ◽  
Organic Matter Fractions

The aim of the study was to compare the effect of conventional, simplified, and organic farming systems on changes in the content of soil organic carbon, organic matter fractions, total nitrogen, and the enzymatic activity. The research was conducted from 2016–2018 on arable land in the south-eastern part of Poland. The selected soils were cultivated in conventional tillage (C_Ts), simplified tillage (S_Ts), and organic farming (O_Fs) systems. The analyses were performed in soil from the soil surface layers (up to 25 cm depth) of the experimental plots. The highest mean contents of soil organic carbon, total nitrogen, and organic matter fractions were determined in soils subjected to the simplified tillage system throughout the experimental period. During the study period, organic carbon concentration on surface soil layers under simplified tillage systems was 31 and 127% higher than the soil under conventional tillage systems and organic farming systems, respectively. Also, the total nitrogen concentration in those soils was more than 40% and 120% higher than conventional tillage systems and organic farming systems, respectively. Moreover, these soils were characterised by a progressive decline in SOC and Nt resources over the study years. There was no significant effect of the analysed tillage systems on the C:N ratio. The tillage systems induced significant differences in the activity of the analysed soil enzymes, i.e., dehydrogenase (DH) and catalase (CAT). The highest DH activity throughout the experiment was recorded in the O_Fs soils, and the mean value of this parameter was in the range of 6.01–6.11 μmol TPF·kg−1·h−1. There were no significant differences in the CAT values between the variants of the experiment. The results confirm that, regardless of other treatments, such as the use of organic fertilisers, tillage has a negative impact on the content of SOC and organic matter fractions in the O_Fs system. All simplifications in tillage reducing the interference with the soil surface layer and the use of organic fertilisers contribute to improvement of soil properties and enhancement of biological activity, which helps to maintain its productivity and fertility.

Associations between organic matter fractions and the active soil microbial biomass

1998 ◽  
Vol 30 (6) ◽  
pp. 767-773 ◽  
Author(s):  
C.R. Alvarez ◽  
R. Alvarez ◽  
M.S. Grigera ◽  
R.S. Lavado
Keyword(s):  
Organic Matter ◽  
Microbial Biomass ◽  
Soil Microbial Biomass ◽  
Soil Microbial ◽  
Organic Matter Fractions

Soil microbial biomass—Interpretation and consideration for soil monitoring

Soil Research ◽  
2011 ◽  
Vol 49 (4) ◽  
pp. 287 ◽  
Author(s):  
V. Gonzalez-Quiñones ◽  
E. A. Stockdale ◽  
N. C. Banning ◽  
F. C. Hoyle ◽  
Y. Sawada ◽  
...  
Keyword(s):  
Organic Matter ◽  
Microbial Biomass ◽  
Soil Microorganisms ◽  
Soil Microbial Biomass ◽  
Biological Function ◽  
Anthropogenic Change ◽  
Soil Monitoring ◽  
Soil Microbial ◽  
Quality Assessments ◽  
The Impact

Since 1970, measurement of the soil microbial biomass (SMB) has been widely adopted as a relatively simple means of assessing the impact of environmental and anthropogenic change on soil microorganisms. The SMB is living and dynamic, and its activity is responsible for the regulation of organic matter transformations and associated energy and nutrient cycling in soil. At a gross level, an increase in SMB is considered beneficial, while a decline in SMB may be considered detrimental if this leads to a decline in biological function. However, absolute SMB values are more difficult to interpret. Target or reference values of SMB are needed for soil quality assessments and to allow ameliorative action to be taken at an appropriate time. However, critical values have not yet been successfully identified for SMB. This paper provides a conceptual framework which outlines how SMB values could be interpreted and measured, with examples provided within an Australian context.

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