title: Role and Variation of the Amount and Composition of Glomalin in Soil Properties in Farmland and Adjacent Plantations with Reference to a Primary Forest in North-Eastern China.
abstract: The glycoprotein known as glomalin-related soil protein (GRSP) is abundantly produced on the hyphae and spores of arbuscular mycorrhizal fungi (AMF) in soil and roots. Few studies have focused on its amount, composition and associations with soil properties and possible land-use influences, although the data hints at soil rehabilitation. By choosing a primary forest soil as a non-degraded reference, it is possible to explore whether afforestation can improve degraded farmland soil by altering GRSP. In this paper, close correlations were found between various soil properties (soil organic carbon, nitrogen, pH, electrical conductivity (EC), and bulk density) and the GRSP amount, between various soil properties and GRSP composition (main functional groups, fluorescent substances, and elements). Afforestation on farmland decreased the EC and bulk density (p < 0.05). The primary forest had a 2.35-2.56-fold higher GRSP amount than those in the plantation forest and farmland, and GRSP composition (tryptophan-like and fulvic acid-like fluorescence; functional groups of C-H, C-O, and O-H; elements of Al, O, Si, C, Ca, and N) in primary forest differed from those in plantation forest and farmland (p < 0.05). However, no evident differences in GRSP amount and composition were observed between the farmland and the plantation forest. Our finding highlights that 30 years poplar afforestation on degraded farmland is not enough to change GRSP-related properties. A longer period of afforestation with close-to-nature managements may favor the AMF-related underground recovery processes.
authors.affiliation: Urban Forests and Wetlands Research Group, Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun, China.
authors.forename: Qiong
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Key Laboratory of Forest Plant Ecology, Northeast Forestry University, Harbin, China.
authors.forename: Wenjie
authors.initials: W
authors.lastname: Wang
authors.affiliation: Urban Forests and Wetlands Research Group, Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun, China.
authors.forename: Xingyuan
authors.initials: X
authors.lastname: He
authors.affiliation: Key Laboratory of Forest Plant Ecology, Northeast Forestry University, Harbin, China.
authors.forename: Wentian
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Urban Forests and Wetlands Research Group, Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun, China.
authors.forename: Kaishan
authors.initials: K
authors.lastname: Song
authors.affiliation: Research Institute of Forest Ecology and Forestry Ecological Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China.
authors.forename: Shijie
authors.initials: S
authors.lastname: Han
mesh_terms: D002681:China; D065928:Forests; D005656:Fungal Proteins / Q000032:analysis*; D006023:Glycoproteins / Q000032:analysis*; D012987:Soil
chemical_list: D005656:Fungal Proteins; D006023:Glycoproteins; D012987:Soil; C573268:glomalin