Table 5.

The influence of nitrogen (N) fertilization on growth of English oak (Quercus robur L.) and European beech (Fagus sylvatica L.) placed outdoors subject to natural climatic conditions at week six after the cessation of an 18-day waterlogging period.

Treatment	Leaf area	Shoot DW	Root DW	Total Plant DW	S:R
English oak
Control	4324.8	312.4	156.7	469.1	1.99
Tapwater	2017.6^*	240.1^*	107.6^*	347.7^*	2.23^*
7.25 g (0.25 oz) N	2761.0^*	251.4^ns	134.3^ns	385.7^ns	1.89^ns
14.5 g (0.51 oz) N	3324.6^*	280.9^ns	149.9^ns	430.8^ns	1.87^ns
29 g (1.02 oz) N	3465.7^*	286.3^ns	156.3^ns	442.6^ns	1.83^ns
LSD	821.72	65.32	33.01	96.77	0.239
European beech
Control	3881.9	289.0	166.9	455.9	1.73
Tapwater	676.9^*	191.2^*	112.4^*	303.6^*	1.70^ns
7.25 g (0.25 oz) N	889.4^*	207.8^*	126.1^*	333.9^*	1.62^ns
14.5 g (0.51 oz) N	1271^*	223.8^*	145.3^ns	369.1^ns	1.54^ns
29 g (1.02 oz) N	1456^*	240.9^ns	150.6^ns	391.5^ns	1.60^ns
LSD	1028.70	63.87	39.47	107.37	0.217

DW = dry weight; shoot DW = leaf and shoot DW combined; S:R = shoot:root ratio. All values mean of ten trees.
↵*Significantly different from controls according to least significant difference (LSD) at P < 0.05.
^ns = not significantly different from control value.