NDLI: The effect of forestry drainage on vertical distributions of major plant nutrients in peat soils

Content Provider	Springer Nature Link
Author	Laiho, Raija Sallantaus, Tapani Laine, Jukka
Copyright Year	1998
Abstract	Vertical distributions of total N, P, K, Ca and Mg in a 0–60 cm surface peat layer were studied at 80 pine mire sites in southern Finland. The sites fell into two categories according to the soil nutrient regime: Meso-oligotrophic and oligo-ombrotrophic, and formed a chronosequence from undrained sites to sites drained 55 years ago. A statistically significant drainage age effect on the gravimetric (mg g-1) concentration profile forms was detected for all nutrients except K. In oligo-ombrotrophic sites the concentration of N increased following drainage in the topmost layer (0–10 cm) and that of P in all layers. In meso-oligotrophic sites the changes in N and P profiles were obscure. The concentration profiles of K remained clearly surface-enriched in both site type groups, but there was a general drop in the concentration values immediately after drainage. Ca and Mg decreased, especially in the 10–20 and 25–35 cm layers in both site type groups. The volumetric (kg m-3) nutrient concentrations clearly reflected the increase in the bulk density of the surface peat occurring after drainage. The compaction of peat had compensated for the effect of the processes removing nutrients from the soil (increased tree stand uptake, leaching); for Ca and Mg to a lesser degree than for the other nutrients. It was concluded that the N, P and K profiles did not show changes that would be likely to affect site productivity, whereas the net loss of Ca and Mg may cause problems in the longer term. As the total K capital of the sites was in general rather small, a disturbance in the biological cycle, such as cutting of the tree stand, may be critical.
Starting Page	169
Ending Page	181
Page Count	13
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	207
Issue Number	2
e-ISSN	15735036
Language	English
Publisher	Springer Netherlands
Publisher Date	1998-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Plant Sciences Soil Science & Conservation Plant Physiology Ecology
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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