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Site‐adjusted organic matter–balance method for use in arable farming systems

Identifieur interne : 000120 ( Main/Exploration ); précédent : 000119; suivant : 000121

Site‐adjusted organic matter–balance method for use in arable farming systems

Auteurs : Hartmut Kolbe [Allemagne]

Source :

RBID : ISTEX:6A3CEFB976F00120ED60E6CEA775FCD7EC20DF6B

Mots-clés :

Abstract

Organic‐matter (OM) balancing can provide useful information for sustainable arable farm management. However, the balance methods commonly used are rather inaccurate and fail to meet current requirements. Therefore, an improved, site‐adjusted, semiquantitative technique based on the VDLUFA method developed by Körschens et al. (2004) in Germany was worked out for terrestrial soils for manual (i.e., not computer‐based) use in agricultural practice and consulting. It was optimized using results from 39 long‐term field trials to take into account site‐specific effects in Central Europe. The climatic, geogenic, and soil‐chemical influences on the process of OM decay were taken into consideration by adapting organic‐carbon (OC) coefficients of the organic material and the cultivation effects of crop species divided into six site‐specific groups. The balances calculated were adjusted to the soil organic‐carbon (SOC) concentrations, and the evaluation system was developed for use in conventional and organic agriculture on sites in Central Europe. The statistical deviation between calculated and field data is ± 3.7 g kg–1 for the VDLUFA method and ± (2.1–2.3) g kg–1 SOC for the site‐adjusted method, and the variance is reduced by 62%–68%. For use in farming, little information about soil and climatic characteristics, crop species, or organic material supply is needed, and the results can be used for in‐depth farm analyses and regulative reasons.


Url:
DOI: 10.1002/jpln.200900175


Affiliations:


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<div type="abstract" xml:lang="de">Organic‐matter (OM) balancing can provide useful information for sustainable arable farm management. However, the balance methods commonly used are rather inaccurate and fail to meet current requirements. Therefore, an improved, site‐adjusted, semiquantitative technique based on the VDLUFA method developed by Körschens et al. (2004) in Germany was worked out for terrestrial soils for manual (i.e., not computer‐based) use in agricultural practice and consulting. It was optimized using results from 39 long‐term field trials to take into account site‐specific effects in Central Europe. The climatic, geogenic, and soil‐chemical influences on the process of OM decay were taken into consideration by adapting organic‐carbon (OC) coefficients of the organic material and the cultivation effects of crop species divided into six site‐specific groups. The balances calculated were adjusted to the soil organic‐carbon (SOC) concentrations, and the evaluation system was developed for use in conventional and organic agriculture on sites in Central Europe. The statistical deviation between calculated and field data is ± 3.7 g kg–1 for the VDLUFA method and ± (2.1–2.3) g kg–1 SOC for the site‐adjusted method, and the variance is reduced by 62%–68%. For use in farming, little information about soil and climatic characteristics, crop species, or organic material supply is needed, and the results can be used for in‐depth farm analyses and regulative reasons.</div>
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