The impact of exogenous organic matter on SOM contents and microbial soil quality

Influence of long-term application of organic and inorganic fertilizers on soil properties

“…On the other hand, an insignificant effect of NPK on C tot content was observed. There are opposing views on the effect of mineral N fertilization on C tot content in the soil (1) mineral N fertilizer promotes N mineralization and can deplete SOM stocks in the course of time and (2) on the contrary, increased plant growth as a result of inorganic N use (compared to no fertilization) increase organic matter inputs and hence SOM stocks (Moeskops et al 2012). Our results do not provide evidence for a significant effect of mineral NPK on C tot content in soil.…”

Effect of organic and mineral fertilizers on soil P and C levels, crop yield and P leaching in a long term trial on a silt loam soil

“…Krey et al (2013) observed a similar or even stronger impact of organic fertilizers applied every third year on plant traits and P availability, compared to the annual application of inorganic P fertilizers. In the long term field trial we sampled in our study, Leroy (2008) and Moeskops et al (2012) showed that not only the quantity, but also the quality of the exogenous organic matter applied has a significant influence on the soil physical properties and soil microbial community, respectively.…”

“…Although the P concentration in the soil solution is dependent on the soil pH (Jones, 1979), we did not find any correlation between soil pH and P-CaCl 2 in our study. Moeskops et al (2012) studied the microbial soil quality of the field trial presented in this study in the winter of 2009-2010 and reported that all organic fertilizers have a positive effect on microbial soil quality compared to mineral fertilizers. Differences in microbial biomass and microbial enzyme activity between farmyard manure and all other organic fertilizer treatments were however small (Moeskops et al, 2012).…”

“…Moeskops et al (2012) studied the microbial soil quality of the field trial presented in this study in the winter of 2009-2010 and reported that all organic fertilizers have a positive effect on microbial soil quality compared to mineral fertilizers. Differences in microbial biomass and microbial enzyme activity between farmyard manure and all other organic fertilizer treatments were however small (Moeskops et al, 2012). We suggest three possible explanations for the differences in P-CaCl 2 and HWP between the organic fertilizer treatments remain: (i) organic acids released by the organic fertilizer, (ii) a combination of increased total P input and increased P-AL levels and (iii) the importance of Ca-P bindings.…”

The earthworm species Metaphire posthuma modulates the effect of organic amendments (compost vs. vermicompost from buffalo manure) on soil microbial properties. A laboratory experiment

“…Increasing soil organic matter (SOM) stocks and stability by addition of organic amendment offers a good way to substantially improve soil quality and therefore agricultural sustainability [17,28,45]. Most of the studies aimed at comparing the influence of animal waste amendment on soil quality have been done using swine, poultry, cow or horse manure as original substrates [6,51].…”