Effects of afforestation of agricultural land with grey alder(Alnus incana(L.) Moench)on soil chemical properties, comparing two contrasting soil groups  

作　　者：Oļģerts Nikodemus Dārta Kaupe Imants Kukuļs Guntis Brūmelis Raimonds Kasparinskis Iluta Dauškaneand Agita Treimane 

机构地区：[1]Faculty of Geography and Earth Sciences,University of Latvia,Jelgavas iela 1,Riga,LV-1004,Latvia [2]Faculty of Biology,University of Latvia,Jelgavas iela 1,Riga,LV-1004,Latvia

出　　处：《Forest Ecosystems》2020年第3期489-498,共10页森林生态系统（英文版）

基　　金：supported by University of Latvia grant Nr. AAp2016/B041//Zd2016/AZ03 within the project “Climate change and sustainable use of natural resources”。

摘　　要：Background: Natural afforestation of former agricultural lands with alder species is common in Europe. Symbiotic nitrogen fixation by actinomycetes associated with alder species has been widely used for improvement of soil properties of abandoned agricultural lands, but relatively little is known of the interactions of these processes with soil type and chemical composition. We conducted a space-for time study with soil sampling under and outside grey alder tree canopies on two different soil groups to explore effects of colonisation of former agricultural lands by alder on soil properties.Results: The results were analysed using analysis of variance. During the first 25 years after afforestation of former agricultural lands there was a significant increase in content of Ctot, Ntot, K+, Fe3+, Mn2+and available P in the topsoil(0–10 cm and 11–20 cm) of Dystric Arenosols soils, which are deficient in organic matter. Such trends were not evident in organic matter rich Endostagnic Umbrisols soils, in which exchangeable K+concentration decreased and exchangeable Fe3+and Al3+concentration increased.Conclusions: The results show that the effects of grey alder on soil chemical properties depend on initial soil properties. The invasion of agricultural land by grey alder leads to spatial variability of soil chemical properties creating a mosaic pattern.

关 键 词：AFFORESTATION Grey alder Soil properties Umbrisols ARENOSOLS TOPSOIL 

分 类 号：S714[农业科学—林学]