1985年7月11日 · One of the most distinctive aspects of soil formation under grassland in temperate climates was recognized in an early classic of pedology, V.V. Dokuchaev's Russian Chernozem. The term ‘chernozem,’ or ‘black earth,’ is an apt description of the thick, dark-colored zone of organic matter accumulation, or A horizon, in soils of relatively ...

2022年3月1日 · The Chernozem horizon has a finer texture than the subsoil, which would mirror the preferred ingestion of finer particles by earthworms (e.g. Darwin, 1881, Evans, 1948, Landmaid, 1964). A Chernozem texture finer than subsoil is reported from other sites (e.g. Altermann et al., 2005).

Moving southward from the chernozem zone in Russia, effective moisture decreases and A horizons become thinner and lighter-colored, reflecting lower organic carbon content. Similar trends in carbon content and A horizon color are observed along east-to-west transects of decreasing effective moisture in the grasslands of central North America ...

2019年9月1日 · Therefore, the main direct reason for the relatively rapid Chernozem leaching and transformation into Retisol in Muszkowice, and possibly more extensively in SW Poland and Central Europe, seems to be the succession of close-canopy beech forests, and, possibly, artificial ‘densification’ (compaction) of other broadleaf/mixed forests ...

2011年10月26日 · Subsequently, the traditional model of Chernozem formation has been questioned in general, and anthropogenic causes have been suggested as crucial for the evolution of Chernozems. Fire clearing by settlers of the Early Neolithic Bandkeramik (LBK), or from other archaeological periods ( Gerlach et al., 2006 ), would have set vast fires ...

2007年5月15日 · After a Chernozem developed in Early and Middle Holocene, an increase in precipitation led to humus degradation in Late Holocene. During 2000 to 3500 years the Chernozem was transformed to a Luvisol, which still contains Chernozem material as a …

2021年12月1日 · Chernozem is a vital agricultural soil source in northeastern China (Zhao et al., 2016b). In the last few decades, soil erosion and human activities have led to massive losses of SOM, triggering serious soil degradation in this region (Yao et al., 2013, Wang et al., 2020). However, the enzymatic mechanism of SOM loss in chernozem northeastern ...

2021年9月1日 · The functioning of Haplic Chernozem in the bare fallow regime for 52 years caused sharp changes in the distribution of its organic and organo-mineral fractions: the amount of Free OM (LF fr) decreased by 12-fold, Occluded OM (LF oc) more than 3.5-fold, and the amount of clay fraction by more than 1.2-fold, while the Res fraction demonstrated ...

2016年3月1日 · Chernozem MDZ is characterized by weak development of pedogenesis as the following magnetic parameters: χ, χ ARM, M s and M rs have lower values than the other profiles (Fig. 5, Fig. 6). For the MDZ profile, the depth extension of pedogenic processes is …

2025年3月1日 · This study investigated whether fertilization and crop type affect the effect of sampling time on soil organic carbon (SOC) content and SOM composition. A cultivated Haplic Chernozem (Loamic) topsoil in Martonvásár, Hungary, was studied in a long-term experiment to compare the effects of fertilization on soil properties under different crops.