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Fig. 1 | Annals of Forest Science

Fig. 1

From: Nitrogen addition method affects growth and nitrogen accumulation in seedlings of four subtropical tree species: Schima superba Gardner & Champ., Pinus massoniana Lamb., Acacia mangium Willd., and Ormosia pinnata Lour

Fig. 1

Effects of N addition levels and methods on total and fine root biomass in four tree species (mean ± SD). Different lowercase letters above the error bars indicate significant differences among N addition level in each species. S-CK: ambient N addition to the soil, S-MN: medium N addition to the soil, S-HN: high N addition to the soil, C-CK: ambient N addition to the canopy, C-MN: medium N addition to the canopy, and C-HN: high N addition to the canopy. Data of soil N addition are from Liu et al. (2017)

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Annals of Forest Science

ISSN: 1297-966X