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New Zealand Journal of Forestry Science
Fig. 2 | New Zealand Journal of Forestry Science

Fig. 2

From: Above- and below-ground biomass distribution and morphological characteristics respond to nitrogen addition in Pinus tabuliformis

Fig. 2

Effect of N fertilization on a cumulative root length, b mean root diameter, c specific root area, and d specific root length for each root order (n = 5 pots). CK, N1, N2, N3, N4, and N5 are 0, 0.02, 0.04, 0.08, 0.16, and 0.32 g N kg−1, respectively. I–VI indicate the first- to sixth-order roots. Different letters indicate significant differences for a given index among the different N additions (p < 0.05)

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