Journalartikel

Jahr der Veröffentlichung: 2018

Seiten: 1117-1125

Zeitschrift: European Journal of Soil Science

Bandnummer: 69

Heftnummer: 6

ISSN: 1351-0754

eISSN: 1365-2389

DOI Link: https://doi.org/10.1111/ejss.12724

Verlag: Wiley

Abstract: 
The effects of partial substitution of synthetic fertilizer N (NPK) with equal quantities of maize (Zea mays L.) stover N (50 kg ha(-1), NPKS) or cattle manure N (115 N kg ha(-1), NPKM) were investigated after 23 years with respect to maize yield, biomass N uptake, residual soil N and gross soil N dynamics in a fertile Chernozem soil. Maize yields were not different among these three treatments: maize biomass N uptake followed the order NPKM approximate to NPK > NPKS, whereas total N in soil was significantly larger under NPKM. A N-15 tracing method was used to explain differences in gross N dynamics of labile and recalcitrant organic N pools and total N in soil. The results showed that NPKS and NPKM compared with NPK increased gross N mineralization by 2.8 and 1.3 times, respectively. The NPKS decreased the gross rate of N nitrification by 14%, whereas NPKM increased it by 47% compared with NPK. The NPKS stimulated microbial competition for NH4+, whereas NPKM increased NO3- immobilization compared with NPK. Our results suggested that acceleration of the soil N cycle under NPKS provided the most likely reason for the small total N stock in soil. In contrast, large organic N input and considerable immobilization of NO3- to a recalcitrant pool was probably the reason for the large total N stock under NPKM.

Harvard-Zitierstil: Li, G., Meng, F., Zhu, P., Lu, C., Yu, W. and Müller, C. (2018) Fertilizer type and organic amendments affect gross N dynamics in a Chinese Chernozem, European Journal of Soil Science, 69(6), pp. 1117-1125. https://doi.org/10.1111/ejss.12724

APA-Zitierstil: Li, G., Meng, F., Zhu, P., Lu, C., Yu, W., & Müller, C. (2018). Fertilizer type and organic amendments affect gross N dynamics in a Chinese Chernozem. European Journal of Soil Science. 69(6), 1117-1125. https://doi.org/10.1111/ejss.12724