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Predicting Litter Decomposition from Soil Properties and Crop Type

Publikation: KonferencebidragPosterFormidling

Soil organic carbon (SOC) content is a critical soil quality indicator which is crucial for several soil functions. One indicator of soil carbon sequestration is the rate of litter decomposition and organic matter stabilization. In this study, we investigated litter decomposition rate k and stabilization factor S in three long-term experiments (LTEs) using the tea bag index (TBI) protocol. Two types of tea with different quality were buried in soil for three months in three LTEs and the k and S were calculated from the weight loss. The LTEs had contrasting soil textures and have been fertilized with manure for between 20 and 127 years, and have three to four rotation crops, including spring barley (Hordeum vulgare L.), winter wheat (Triticum aestivum L.), maize (Zea mays L.), and grass/clover in one site. Soil physico-chemical properties including texture, SOC, pH, EC and nutrient contents, and soil structural properties, i.e. bulk density, gas transport parameters and water stable aggregates were measured. Here, we modeled the relationships between the TBI parameters and aforementioned edaphic and crop factors. The results could contribute to the estimation of carbon sequestration potential from basic soil properties and crop type.
Udgivelsesår8 nov. 2021
StatusUdgivet - 8 nov. 2021

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