Auswirkungen eines 10‐jährigen Miscanthusanbaus auf ausgewählte Eigenschaften eines Mineralbodens in Nordostdeutschland

Abstract

Effects of 10 years of Miscanthus cultivation on different properties of mineral soil in North‐east Germany The effects of 4–10 years of Miscanthus cultivation on different soil properties was investigated at Klein Markow (Mecklenburg‐Pommerania, Germany) in variants with and without Miscanthus between 1994 and 2000. Soil containing Miscanthus showed higher concentrations of organic carbon (Corg) (+0,29 %) and total nitrogen (Nt) (+0,03 %) and consequently an increased storage of soil organic matter (SOM) (+15,5 t ha–1) as a result of high amounts of leaves, roots and rhizomes. With regard to concentrations of Corg, cation exchange capacity, porosity and water retention significantly increased, while the wet and bulk density decreased in Miscanthus variants. The concentration of Corg and storage of SOM were increased significantly during the experimental period of Miscanthus treatments. The mineralization of the organic soil compounds which developed was comparable with those of the SOM. The reintegration of the Miscanthus area into a crop rotation system was possible only after the last harvest in February and seed of winter rape in August of the same year. The application of Glyphosat and the later shading by rape stands led to failure of the Miscanthus cultivations.

Comparison of Miscanthus and Switchgrass Cultivars for Biomass Yield, Soil Nutrients, and Nutrient Removal in Northwest Spain

“…Estimates of annual soil C sequestration by energy crops such as switchgrass range from 500 to 2900 kg ha -1 (Al-Kaisi et al, 2005;Ma et al, 2000;Sanderson et al, 1999). Kahle et al (2002) observed annual C sequestration of 1220 kg ha -1 in miscanthus plots ranging from 4-to 10-yr old, in northeastern Germany. Our results are at the upper part of the reported ranges.…”

Species and Genotype Effects of Bioenergy Crops on Root Production, Carbon and Nitrogen in Temperate Agricultural Soil

“…Rubino et al [36] quantified significant incorporation of 13 C-labelled poplar litter into the topsoil horizon in Italy. Significant input from Miscanthus leaves is unlikely, however [18], despite a potential input of up to 7 Mg C ha −1 year −1 [37][38][39]. Even for late-harvest Miscanthus, leaf fall remains largely undecomposed [22], partly because of its reduced quality arising from the translocation of N from senescing leaves to the rhizome at the end of the growing season [40].…”

Metagenomic insights into the alteration of soil N‐cycling‐related microbiome and functions under long‐term conversion of cropland toMiscanthus

“…Hence, an appropriate amount of industrial N fertilizer is needed to compensate for the annual soil N losses to maintain the high successive biomass yields of Miscanthus; otherwise, the significant decrease in soil N levels could be caused even over a short establishment period (Placek et al, 2018;Wang et al, 2017). However, many papers suggest that soil N contents are not affected much after Miscanthus establishment (Brami et al, 2020;Duan et al, 2019;Dufossé et al, 2014;Gregory et al, 2018;Kang et al, 2020;Krol et al, 2019;Xu et al, 2021) or even increased (Chen et al, 2009;Das et al, 2016;Dufossé et al, 2014;Kahle et al, 1999Kahle et al, , 2002Nebeská et al, 2018) to some degree in the absence of N supplement independent of the cultivation years and soil types. We previously found that the annual harvest of a large amount of biomass (around 22.22 t/ ha/year) over a long-term period (> 15 years) slightly increased total N (TN) contents of 0-100 cm soil in the absence of N fertilization (Zhao et al, 2020(Zhao et al, , 2021.…”