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6篇 您的检索式：作者名="Nikodemus"

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		题名	作者	年代	出处	被引量
	1	The impact of economic,social and political factors on the landscape structure of the Vidzeme Uplands in Latvia显示文摘	Olgerts Nikodemus		0，，70：	1
	2	The perception of abandoned farmland by local people and experts:Landscape value and perspectives on future land use显示文摘	Ruskule A Nikodemus O Kasparinskis R	2013	Landscape and Urban Planning2013，115，：	1
	3	The monitoring and risk assessment of Zn deposition around a metal smelter in Latvia 显示文摘	Brumelis G Brown D H Nikodemus O	1999	Environmental Monitoring and Assessment1999，58，：	1
	4	Monitoring of air pollution in Latvia between 1990 and 2000 using moss 显示文摘	Nikodemus O Brumelis G Tabors G	2004	Journal of Atmospheric Chemistry2004，49，：	1
	5	Monitoring of Air Pollution in Latvia Between 1990 and 2000 Using Moss显示文摘	O. Nikodemus G. Brūmelis G. Tabors L. Lapia S. Pope	2004	Journal of Atmospheric Chemistry (-)2004，，1：	1
	6	Effects of afforestation of agricultural land with grey alder(Alnus incana(L.) Moench)on soil chemical properties, comparing two contrasting soil groups显示文摘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.	Oļģerts Nikodemus Dārta Kaupe Imants Kukuļs Guntis Brūmelis Raimonds Kasparinskis Iluta Dauškaneand Agita Treimane	2020	Forest Ecosystems2020，7，3：	0

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