Short-Term Effects of Hemp-derived Amendments on Soil C and N Turnover and Microbial Efficiency across Three Soil Types
Küçük Resim Yok
Tarih
2026
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer Int Publ Ag
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
This study aimed to evaluate the short-term impacts of hemp-derived amendments on soil organic matter (SOM) stability, microbial functioning, and carbon-nitrogen cycling across three soil types (Entisol, Alfisol, and Mollisol). We hypothesized that amendment chemistry and soil properties would jointly influence microbial carbon use efficiency (CUE) and short-term carbon sequestration potential. Industrial hemp residue, biochar, and pyrolysis oil were applied at two carbon-equivalent doses (5 and 10 g C kg(-)(1) dry soil) under controlled 120-day incubation conditions. Cumulative CO2 emissions, dissolved organic carbon and nitrogen, microbial biomass (C and N), SOM stabilization indices, and microbial efficiency metrics (CUE, qCO(2)) were quantified. FTIR spectroscopy was used to characterize amendment chemical structures, and multivariate analyses (PCA and hierarchical clustering) were performed to identify treatment-soil interactions. Biochar markedly increased carbon retention and microbial CUE relative to hemp residue and pyrolysis oil, thereby promoting rapid mineralization and higher CO2 release. FTIR analysis confirmed the presence of stronger aromatic and condensed structures in biochar, indicating greater recalcitrance. Soil type strongly modulated amendment effects: Alfisol exhibited the highest microbial efficiency, whereas Entisol showed the most labile C turnover. Differences were linked to pH, texture, and inherent SOM content. Hemp-derived amendments can enhance short-term SOM stabilization and microbial efficiency, but their effectiveness depends on both amendment chemistry and soil type. Biochar showed the most tremendous potential to improve carbon management, while residue and pyrolysis oil stimulated rapid nutrient cycling. These findings highlight the value of soil-specific strategies when using hemp-based organic inputs to improve soil health.Graphical Abstract Key Insights from the Graph: Hemp Biochar (BC1 & BC2) treatments show the highest carbon sequestration while also reducing CO2 emissions significantly.Hemp Residue (Hemp1 & Hemp2) and Pyrolysis Oil (BC Oil1 & BC Oil2) lead to higher CO2 emissions, meaning they contribute to short-term microbial activity but not long-term sequestration.Microbial efficiency (CUE ratio) is highest in biochar-treated soils, reinforcing its role in long-term carbon stabilization.
Açıklama
Anahtar Kelimeler
Hemp-Derived Amendments, Biochar, Soil Health Indicators, Carbon Sequestration, Fourier Transform Infrared (Ftir) Spectroscopy, Carbon Use Efficiency (Cue)
Kaynak
Journal of Soil Science and Plant Nutrition
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
26
Sayı
1
