Effect of long term land use systems on fractions of glomalin and soil organic carbon in the Indo-Gangetic plain

Singh, Ashutosh Kumar; Rai, Apurva; Singh, Nandita

doi:10.1016/j.geoderma.2016.05.004

Cited by 103 publications

(44 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, other studies suggest that AMF diversity mainly depend not only on the vegetation but also on the soil nutrient status (Kivlin et al, 2011). A strong positive correlation has been observed between soil organic carbon and soil microbial population and their activity (Singh et al, 2016). Higher soil moisture together with a greater organic C content in the MF may have facilitated a higher abundance of AMF and their colonisation potential in the present study.…”

Section: Soil Edaphic Properties and Root Colonisation Potential Of Amfsupporting

confidence: 47%

Arbuscular mycorrhizal fungal dynamics following change of land use from mature forest to Eucalyptus plantation

Edirisinghe

Madawala

2017

J. Natn. Sci. Foundation Sri Lanka

View full text Add to dashboard Cite

Abstract:Change of arbuscular mycorrhizal fungi (AMF) dynamics following land use change was investigated. A study was carried out using four land use types viz., a mature forest (MF), a Eucalyptus plantation (EP: which was established after clearing mature forests in the area in 1980s) and two regenerating forests (Re: following clear-cut of Eucalyptus in 2005), where one is bordered by a Eucalyptus plantation (Re-EP) and the other bordered by a mature forest (Re-MF), located in the Intermediate Zone of Sri Lanka. Soil samples were collected from each land use type and the AMF spores were quantified and identified into morphotypes. Percentage AMF colonisation in fine roots was also quantified. Some basic soil parameters (pH, soil moisture, available P and total C) were also tested. A total of 24,698; 16,379; 15,791 and 15,165 spores were recovered from MF, EP, Re-EP and Re-MF, respectively. The number of morphotypes was 14, 13, 11 and 9 in Re-EP, EP, MF and Re-MF, respectively. The MF showed the highest diversity index (0.970), followed by EP, Re-EP and Re-MF. The MF showed a significantly higher average number of spores (2,058) compared to EP, Re-EP and Re-MF (1,365; 1,316 and 1,264, respectively). Out of 19 morphotypes, 5 (26 %) were observed in all land use types, while 4 (21 %) were observed exclusively in Re-EP. Percentage root colonisation was significantly higher in MF (≈70 %) than in other land use types (52 -53 %). The MF showed a higher soil moisture and total organic matter content than the rest of the study sites, with no significant difference in available P. The results indicate that the change of land use has clearly altered the abundance and composition of the AMF population.

show abstract

Section: Soil Edaphic Properties and Root Colonisation Potential Of Amfsupporting

confidence: 47%

Arbuscular mycorrhizal fungal dynamics following change of land use from mature forest to Eucalyptus plantation

Edirisinghe

Madawala

2017

J. Natn. Sci. Foundation Sri Lanka

View full text Add to dashboard Cite

show abstract

“…The soil conditioning function of GRSP has well reported, and understanding of how to improve GRSP accumulation in soil is important for the GRSP-oriented degraded soil rehabilitation 14,44 . Long-term land uses could affect fractions of glomalin and SOC in the Indo-Gangetic plain 10 . The primary forests had 2.35–2.56-fold higher GRSP amount than those in the plantation forests and farmlands 14 , while the GRSP amount significantly correlated with soil bulk density and soil water 47 .…”

Section: Discussionmentioning

confidence: 99%

Glomalin contributed more to carbon, nutrients in deeper soils, and differently associated with climates and soil properties in vertical profiles

Wang

Zhong

Wang

et al. 2017

Sci Rep

View full text Add to dashboard Cite

Despite vital importance in soil conditioning and a proxy for arbuscular mycorrhizal (AMF), glomalin-related soil protein (GRSP) contribution to soil carbon and nutrients at vertical soil profiles and underlying mechanism were not well-defined yet. Thus, 360 soil samples were collected from 72 farmland 1-m soil profiles in northeastern China, and soil physiochemical properties, nutrients, glomalin characteristics, local climates were determined. Linear decreases of glomalin amounts were observed from the top to deep soils, and glomalin/SOC (glomalin ratio to total SOC) in the 80–100 cm soil (EEG, easily-extracted GRSP, 2.2%; TG, total GRSP, 19%) was 1.34–1.5-fold higher than did in the 0–20 cm soil. Different statistical analyses crosschecked that the lower pH and higher SOC usually accompanied with the higher EEG and TG, while EEG was more sensitive to climates; Moreover, glomalin was more physiochemical-regulated in the deep soils, but more nutrient-regulation was found in the surface soils. Structure Equation Model showed that soil depths and climates indirectly affected TG and EEG features through soil properties, except significant direct effects on EEG. In future, glomalin assessment should fully consider these for identifying the AMF importance in the whole 1-m profile, and our findings also favor degrade soil improvement from glomalin rehabilitation.

show abstract

“…Recent studies have shown that GRSP could response to elevated CO 2 and N addition in a subtropical forest, which favors the potential consequences for soil C accumulation ( Zhang et al, ). Moreover, long‐term land use systems could affect fractions of glomalin and soil organic C in the Indo‐Gangetic plain ( Singh et al, ). Both, EE‐GRSP and T‐GRSP were significantly correlated with the SOC ( Woignier et al, ), and Fokom et al () reported the regression equations as SOC (g kg −1 ) = 0.023GRSP +1.3274 ( R 2 = 0.7648).…”

Section: Discussionmentioning

confidence: 99%

“…Glomalin‐related soil protein (GRSP) is a glycoprotein produced by the hyphae of arbuscular mycorrhizal fungi (AMF) that contain large contents of metal ions ( Wright et al, ; Wright and Upadhyaya , ). GRSP amount received increasing attention over the past few years for enhancing soil aggregate stability ( Rillig et al, ; Wu et al, ; Xie et al, ; Zhang et al, ) and loading capacity for heavy metals ( Wright and Upadhyaya , ), maintaining soil fertility, increasing soil C capture ( Rillig et al, ; Luna et al, ; Singh et al, ), and regulating soil acidity ( Cai et al, ; Wang et al, ; Zhang et al, ). Recent studies also show that GRSP has a complex composition of asparagine‐linked carbohydrate chains ( Wright et al, ; Wang et al, ), and it is a mixture of organic matter, amino acids and carbohydrates along with some aliphatic methines, methylenes ( Rillig et al, ), and possibly some auto‐fluorescent compounds tightly bound with metal ions ( Aguilera et al, ; Wang et al, ).…”

Section: Introductionmentioning

confidence: 99%

Glomalin amount and compositional variation, and their associations with soil properties in farmland, northeastern China

Zhong

Wang

et al. 2017

J. Plant Nutr. Soil Sci.

View full text Add to dashboard Cite

Glomalin‐related soil protein (GRSP) is well‐known for its soil conditioning functions, but compositional traits are rarely considered. Farmland in northeastern China is the most important commercial grain basis, and soil degradation becomes the bottleneck for keeping crop productivity. The objective of this study was to uncover the possible associations between GRSP (amount and composition) and soil properties, and make suggestions for soil improvement from soil glomalin rehabilitation in northeastern China. Here, spatial variation in GRSP amount (Easily‐extractable‐GRSP, EE‐GRSP; Total‐GRSP, T‐GRSP) and its compositional traits from infrared spectroscopy, UV‐absorbance, X‐ray diffraction (XRD) and 3‐D fluorescence spectroscopy were surveyed in 360 soil samples across northeastern China, and their association with 11 soil properties were also analyzed for finding the possible influence of soil properties on GRSP composition in farmland. There about 3‐fold spatial variation in GRSP amount was observed, while functional group variations were ranged from 1.2‐fold (O–H & N–H stretching) to 2.4‐fold (C–O stretching & O–H bending of –COOH) in different locations. The XRD showed that grain size was 113–180Å and crystallinity was 0.71–1.42%, and GRSP contained seven fluorescent compounds of tyrosine‐like, tryptophan‐like, fulvic acid‐like, soluble microbial byproduct, humic acid‐like, nitrobenzoxadidole‐like, and calcofluor white‐like. Both, EE‐GRSP and T‐GRSP positively associated with soil organic carbon (SOC), soil N (SON), soil P (SOP), alkali‐hydrolyzed N (AN), available P (AP), available K (AK), and soil water, while negatively associated with soil pH and soil bulk density. Structural equation model (SEM) analysis indicates that direct effects on GRSP amounts were mainly from soil bulk density (coefficient: –0.27), soil pH (coefficients: –0.51 to –0.57), SOC (coefficients: 0.51 to 0.69) and AP (coefficients: 0.18 to 0.26), while all other soil properties had indirect effects on GRSP amounts via their close associations with these four parameters. Compared with the GRSP amounts, soil properties laid fewer effects on GRSP compositional traits. Of 16 compositional traits, five of them showed possible regulations from soil properties, which were three infrared functional groups (IR‐II: aliphatic C–H stretching; IR‐V: C–O stretching & O–H bending of –COOH; IR‐VII: O–H binding) and two fluorescent compounds (tyrosine‐like and humic acid‐like). SEM analysis indicates that soil water, pH and EC could directly affect IR‐II, IRV, tyrosine‐like and humic acid‐like, while available nutrients showed more evident influences on infra‐red functional groups than total amounts of N, P and K. Moreover, SOC, as a media of various soil nutrients, gave the strongest influence on GRSP compositional traits. As a supplement to previous studies, we found that GRSP is a mixture of different fluorescent compounds with different functional groups. Our findings highlight that soil properties could strongly change both GRSP accumulatio...

show abstract

Effect of long term land use systems on fractions of glomalin and soil organic carbon in the Indo-Gangetic plain

Cited by 103 publications

References 46 publications

Arbuscular mycorrhizal fungal dynamics following change of land use from mature forest to Eucalyptus plantation

Arbuscular mycorrhizal fungal dynamics following change of land use from mature forest to Eucalyptus plantation

Glomalin contributed more to carbon, nutrients in deeper soils, and differently associated with climates and soil properties in vertical profiles

Glomalin amount and compositional variation, and their associations with soil properties in farmland, northeastern China

Contact Info

Product

Resources

About