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Air-drying changes the distribution of Hedley phosphorus pools in forest soils
Wang Jipeng1,2; Wu Yanhong1; Zhou Jun1; Bing Haijian1; Sun Hongyang1; Luo Ji1; Pu Shengyan2
Source PublicationPEDOSPHERE
Contribution Rank1
AbstractHedley labile phosphorus (P) pools in soil tend to be several times larger than annual forest requirements, even in highly weathered soils characterized by P limitation. The discrepancy between plant and soil P status could be partly attributable to the frequently adopted air-drying pretreatment that tends to increase soil P solubility. In this study, the effects of air-drying on the distribution of Hedley P fractions were examined using soils collected under 4 forest types at Gongga Mountain, southwestern China. The results showed that the microbial biomass P (P mic) in the organic horizon decreased markedly after air-drying. The concentrations of Hedley labile P in the air-dried samples were 31%-73% more than those in the field-moist samples. Consequently, the air-drying-induced increments of Hedley labile P pools in the surface soil horizons were 0.8-3.8 times the annual plant P requirements. The organic horizon was more susceptible to the air-drying-induced increases in Hedley labile P than the mineral horizon, probably because of the stronger release of P mic and disruption of soil organic matter. The quality of P, indexed by the ratio of Hedley labile P to slowly cycling P, shifted in favor of the Hedley labile fractions after air-drying, further revealing that air-drying changed the distribution of Hedley P pools in forest soils. These indicated that the effects of air-drying could not be ignored when interpreting the discrepancy between the P status of plants and the Hedley labile P pools in forest soils. To more efficiently evaluate the P status in forest soils via the Hedley fractionation procedure, the use of field-moist soils is recommended.
KeywordHedley fractionation labile phosphorus microbial biomass phosphorus phosphorous limitation slowly cycling phosphorus soil pretreatment
Indexed BySCI
Funding ProjectNational Natural Science Foundation of China[41630751] ; National Natural Science Foundation of China[41401253] ; National Natural Science Foundation of China[41471416]
WOS Research AreaAgriculture
WOS SubjectSoil Science
WOS IDWOS:000509783800012
Funding OrganizationNational Natural Science Foundation of China
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Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorWu Yanhong
Affiliation1.Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China;
2.State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Wang Jipeng,Wu Yanhong,Zhou Jun,et al. Air-drying changes the distribution of Hedley phosphorus pools in forest soils[J]. PEDOSPHERE,2020,30(2):272-284.
APA Wang Jipeng.,Wu Yanhong.,Zhou Jun.,Bing Haijian.,Sun Hongyang.,...&Pu Shengyan.(2020).Air-drying changes the distribution of Hedley phosphorus pools in forest soils.PEDOSPHERE,30(2),272-284.
MLA Wang Jipeng,et al."Air-drying changes the distribution of Hedley phosphorus pools in forest soils".PEDOSPHERE 30.2(2020):272-284.
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