Cellulose decomposed faster in fallow soil than in meadow soil due to a shorter lag time

Abstract

The study aimed at comparing organic matter decomposition in two semi-natural agrobiocenozes, namely fallows and meadows, with similar plant biomass but differing in plant community composition and diversity and in succession stage. Materials and methods The decomposition rate of a standard material (cellulose) was measured in soils from six fallows and six meadows spanning a few kilometres apart. The mathematical model was fitted to the data. Results and discussion The model showed a significantly longer lag-time in cellulose decomposition in the meadows. Despite the delayed start of decomposition in the meadows, the estimated decomposition rates were similar in both ecosystem types, once the decay started. Conclusions The faster start of decomposition in fallows seems to be promoted by higher contents of nitrates and phosphates in the fallow soils. The fallows, as younger ecosystems, may have faster C turnover than older grasslands due to remains of fertilisers on these ex-arable fields.

Carboxylated nanocellulose superabsorbent: Biodegradation and soil water retention properties

“…Considering that the SAP is composed of more than 90% cellobiose units with the remainder being oxidized glucose units, its decomposition rate can be compared to that of cellulose, reported to range from 0.03 and 0.06 d -1 . [58][59][60][61] The calculated values of soil amended with 0.2 wt% SAP correspond to this range. The rate of superabsorbent breakdown is affected by soils and incubation conditions: moisture content and temperature.…”

“…The rate of superabsorbent decomposition in soil is independent of the type of superabsorbent (either freeze‐dried or oven‐dried). Considering that the SAP is composed of more than 90% cellobiose units with the remainder being oxidized glucose units, its decomposition rate can be compared to that of cellulose, reported to range from 0.03 and 0.06 d –1 58–61 . The calculated values of soil amended with 0.2 wt% SAP correspond to this range.…”

“…depending on the SAP type and application rate. This model successfully described decomposition rates of carbon sources such as cellulose or manure (Cabassi et al 2008;Chmolowska et al 2017;Hadas et al 2004). The decay rate constant of the soil amended with 0.2 wt% SAP was similar for nanocellulose freeze-dried and oven-dried 50 °C, ranging between 0.042 and 0.048 d -1 , respectively.…”

“…This model successfully described decomposition rates of carbon sources such as cellulose or manure. [59][60][61] The decay rate constant of the soil amended with 0.2 wt% SAP was similar for nanocellulose freezedried and oven-dried 50 C, ranging between 0.042 and 0.048 d À1 , respectively. The rate of superabsorbent decomposition in soil is independent of the type of superabsorbent (either freeze-dried or oven-dried).…”

Release of microplastic fibres and fragmentation to billions of nanoplastics from period products: preliminary assessment of potential health implications

“…This is because cellulose is a very stable natural polymer with half-life of 5–8 million years and even in environments where microbes have developed highly specialised sets of enzymes, its degradation is in the order of weeks or months. 28 Although larger fibres are more likely to be flushed out and are therefore less likely to be retained in the body, some released fibres can remain inside the body at least for as long the product is used (up to 8 h) and possibly harbour bacterial infections, rupture cells or cause irritation and inflammation. 29 Little attention has been given to the fate of such fibres inside the vagina.…”