Table 1.

Biomass allocation to the different plant fractions in B. pubescens and Q. petraea trees harvested at the beginning of the δ¹³C-labeling experiment in April 2008 (i.e. at the beginning of the first growing season after clipping).

Biomass allocation (% total plant biomass)	B. pubescens		Q. petraea
	Clipped	Control	Clipped	Control
1-year-old stems	2.4 (0.3)	9.8 (1.6)**	1.3 (0.3)	4.8 (0.7)**
2-year-old stems	12.5 (2.8)	14.3 (1.8)	11.1 (2.0)	11.8 (1.5)
Main stems	30.3 (1.8)	23.8 (2.0)*	21.7 (1.5)	18.6 (1.3)
Coarse roots	25.0 (1.9)	24.8 (2.0)	39.6 (3.0)	36.8 (1.6)
Fine roots	16.0 (1.3)	16.6 (3.7)	10.0 (1.2)	13.8 (0.9)

Data are means and SE (in parentheses). Significant differences between treatments within species are indicated by asterisks: ^*P < 0.10, ^**P < 0.05, N = 5.