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Abstract

Effect of mineral and organic fertilization on crop yield, nitrogen uptake, carbon and nitrogen balances, as well as soil organic carbon content and dynamics: results from 20 European long-term field experiments of the twenty-first century.

Assembled results from 20 European long-term experiments (LTE), mainly from the
first decade of the twenty-first century, are presented. The included LTEs from 17
sites are the responsibility of institutional members of the International Working
Group of Long-term Experiments in the IUSS. Between the sites, average annual
temperatures differ between 8.1 and 15.38C, annual precipitation between 450 and
1400 mm, and soil clay contents between 3 and 31%. On average of 350 yield
comparisons, combined mineral and organic fertilization resulted in a 6% yield
benefit compared with mineral fertilization alone; in the case of winter wheat, the
smallest effect was 3%, the largest effect, seen with potatoes, was 9%. All
unfertilized treatments are depleted in soil organic carbon (SOC), varying between
0.36 and 2.06% SOC. The differences in SOC in unfertilized plots compared with
the respective plots with combined mineral (NPK) and organic (10 t ha71 farmyard
manure) fertilization range between 0.11 and 0.72%, with an average of 0.3%
(corresponding to *15 t ha71). Consequently, the use of arable soils for carbon
sequestration is limited and of low relevance and merely depleted soils can
temporarily accumulate carbon up to their optimum C content.



Körschens, M.; , Albert, E.; Armbruster, M.; Barkusky, D.; Baumecker, M.; Behle-Schalk, L.; Bischoff, R.; Cergan, Z.; Ellmer, F.; Hrbst, F.; Hoffmann, S.; Hofmann, B.; Kismanyoky, T.; Kubat, J.; Kunzova, E.; Lopez, C.; Lopez-Fando,C.; Merbach, I.; Merbach, W.; Pardor, M.T.; Rogasik, J.; Ruehlmann, J.; Spiegel, H.; Schulz., E.; Tajnsek, A.; Toth, Z.; Wegener, H.; Zorn, W. 2013. Effect of mineral and organic fertilization on crop yield, nitrogen uptake, carbon and nitrogen balances, as well as soil organic carbon content and dynamics: results from 20 European long-term field experiments of the twenty-first century. Archives of Agronomy and Soil Science 59 (8), 1017-1040.