Effects of liming and NPK-fertilization on the soil and fine roots in a Norway spruce stand
2010
Konôpka, B., National Forest Centre - Forest Research Institute Zvolen, Zvolen (Slovak Republic) | Takáčová, E., National Forest Centre - Forest Research Institute Zvolen, Zvolen (Slovak Republic)
The main objective of the paper is the quantification of liming (CaO + MgO) and/or NPK-fertilization effects on soil chemical properties and fine root parameters in an 85-year-old Norway spruce (Picea abies L. Karst.) stand in the Nízke Tatry Mts, Central Slovakia. The analyses of pH and soil solution Ca/Al molar ratio were carried out two and six years after applying the amelioration materials onto the soil. Fine roots in the soil depths of 0−5, 5−15 and 15−25 cm were included in the analyses, and their biomass, necromass, length, surface area and number of root tips were measured. Two years after the liming, values of pH and Ca/Al molar ratio increased significantly only in the top 5 cm of the soil. Six years after the treatment, pH and Ca/Al molar ratio changed also in the soil depth 5−15 cm. NPK-fertilization did not modify the values remarkably. Biomass of fine roots, their length, surface area and number of root tips were stimulated by the liming six years after the application. The NPK-fertilization increased quantity of very fine root necromass. Thus, the fertilization was considered less efficient in stimulating fine root biomass than liming. Mutual combination of liming and NPK-fertilization did not show any additional effects on fine root biomass. Vertical distribution of fine roots was only slightly modified by the application of the lime and/or fertilizer as compared to the control plot.
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