Sample: Flakaliden Soil warming exp. 1997

Details

Sample type

Leaves/Needles

Sampled

1997

Available

Yes

Description

Three different age classes of spruce needles (C+0-, C+1- and C+2-needles) collected in the soil warming experiment at Flakaliden 1997-10-16. The samples were taken on the seventh branch whorl. C+0-needles and C+1-needles has been analysed. • Sample no. Fla 1514-1558 = remains of ground C+1-needles. • Sample no. Fla 1763-1770 = remains of ground C+0-needles. • Unground C+2-needles, stored in glass tubes, not analysed. A key list for the analysed samples is available for download. Control plot 8B:1 was replaced with control plot 12B:1 in year 1997. As a precaution needle samples from both plots were collected.

Background information

The soil warming experiment, which started in 1994 and ended in the autumn of 2012, was conducted on two treatments: irrigation with water (I) and irrigation with liquid fertiliser (IL), with two control plots and two heated plots on each treatment, a total of eight plots (size 10x10 m). The ground was heated by heating cables installed between humus and mineral soil. Heated plots were kept 5°C warmer than the control areas during the vegetation period. Soil warming started one month before normal spring thaw. In the autumn, when the control areas froze, the heating was reduced by 1°C per week, which means that the frost-free period was extended around two months per year.

Associated trials

Events Analysis 1997: Nutrient analysis of C+0-needles and C+1-needles.
Miscellaneous 2004: These samples were first stored at The Department of Forest Production Ecology, SLU Uppsala. In 2004 the samples were sent to SilvaBoreal-Archive for longtime storage.

Location and ownership

Organisation

SLU - ESF - Vindelns försöksparker

Location

Östvallen → Attic (Not temperature regulated)

Contact

Ulla Nylander
ulla.nylander@slu.se