Land Use Changes and Sustainable Land Management Practices for Soil Carbon Sequestration in Sub-Saharan African Agro-ecosystems

Were, Kennedy; Singh, Bal Ram; Ayaga, George

doi:10.1007/978-3-030-37537-9_3

Cited by 3 publications

(1 citation statement)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We characterized the soil organic fraction by FTIR and found that the functional groups of organic fraction in the soil also tend to be homogeneous after multiple generations of succession, which reduces the effectiveness of organic carbon, indicating that multiple generations of succession are not conducive to the efficient cycling of organic carbon in eucalyptus plantation soils (3620 cm −1 ), which are more stable carbon sources and difficult to be used by soil microorganisms, thus affecting the nutrient conversion rate [ 47 ]. Meanwhile, new unsaturated (C=C, C=O, 2361 cm −1 ) production was found in the high-generation T3 soils, indicating that successive plantings change their native soil organic fraction and structure [ 48 , 49 ].…”

Section: Discussionmentioning

confidence: 99%

Structural equation model was used to evaluate the effects of soil chemical environment, fertility and enzyme activity on eucalyptus biomass

Tang¹,

Zhao²,

Qin³

et al. 2023

R. Soc. open sci.

View full text Add to dashboard Cite

This paper aims to reveal the effects of multi-generational succession of eucalyptus on soil fertility, organic structure and biological properties. Soil samples were collected from eucalyptus plantations of different stand ages (5, 11, 17 and 21 years old) in a typical area in south Asia, soil organic fraction structure and content characteristics were investigated using Fourier transform infrared (FTIR), and structural equation modelling (SEM) was used to explore influences of soil fertility, enzyme activity and organic fraction on stand biomass. FTIR analysis showed that 11 infrared absorption peaks existed in the soils of this study area, attributed to silicates, aromatics, carbonate ions, sugars, esters, polysaccharides, aliphatic hydrocarbons and phenolic alcohols. Combined with the results of peak area integration, the content of esters, aromatics and phenolic alcohols was significantly higher in 17- and 21-year-old stand soils than in control soils. The results of SEM showed that organic components were negatively related ( p < 0.01) to enzyme activity and biomass, with standardized coefficients of 0.53 and 0.49, respectively. In summary, multi-generation succession of eucalyptus trees can change the structure of soil organic functional group composition and promote the enrichment of aromatic and phenolic alcohol functional groups. Such changes can directly inhibit the increase in eucalyptus biomass and indirectly negatively affect biomass by inhibiting enzyme activity.

show abstract

Section: Discussionmentioning

confidence: 99%