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A soil quality index for subtropical sandy soils under different Eucalyptus harvest residue managements

Journal of Forestry Research 2023年第1期34卷 243-255页

作者： Jackson Freitas Brilhante de Sao José Maurício Roberto Cherubin luciano kayser vargas Bruno Brito Lisboa Josiléia Acordi Zanatta Elias Frank Araújo Cimélio Bayer Department of Agricultural Research and Diagnosis Agriculture SecretariatLivestock and Rural Development of Rio Grande do Sul.570Goncalves Dias St.Porto AlegreRio Grande do SulBrazil Department of Soil Science “Luiz de Queiroz”College of Agriculture/University of Sao PauloPadua Dias Ave 11PiracicabaSao PauloBrazil Embrapa Floretas Estrada da Ribeirakm 111ColomboParanáBrazil CMPC Celulose RiograndenseSao Geraldo St.GuaíbaRio Grande do Sul 1680Brazil Department of Soil Science Federal University of Rio Grande do SulPorto AlegreBrazil

Eucalyptus harvest residues are attractive energy production resources for the forestry ***,their removal can have adverse impacts on soil quality and forest productivity,especially in sandy *** this study,we assessed the effects of Eucalyptus harvest residue managements with variable intensity on forest productivity and on physical,chemical,and biological indicators of the soil *** experiment was conducted in a Quartzipsamment(33 g kg-1clay)planted with Eucalyptus saligna in Barra do Ribeiro in southern *** the Eucalyptus was planted,residues from the previous rotation were subjected to five different management treatments:(1)FRM,in which all forest residues(bark,branches,leaves,and litter)were allowed to remain on the soil and only trunk wood was removed;(2)FRMB,in which was identical to FRM except that bark was also removed;(3)FRMBr,in which only trunk wood and branches were removed;(4)FRR,which involved removing all types of residues(bark,branches,leaves,and litter);and,(5)FRRs,in which all forest residues from the previous rotation were removed,and leaves and branches from the new plantation were prevented from falling onto the soil surface using a shade *** years after planting,soil samples were collected at four different depths(0-2.5,2.5-5,5-10,and 10-20 cm)to determine 17 soil chemical,physical,and biological *** results were combined into a soil quality index(SQI)using the principal component analysis *** SQI reduced by 30%,in the 0-20 cm layer,due to removal of harvest residues from the previous rotation,and collection of litter before it falls on the *** main drivers of SQI reduction were the principal components associated with soil organic matter and biological ***,the SQI was positively linearly related to tree height at P<0.01 and to tree diameter at breast height at P=*** adverse impact on soil quality and forest productivity in our study indicates that removal

关键词： Forest residues Soil health Soil organic carbon Microbial biomass Soil conservation

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