Nutrient and Photosynthetic Characteristics of Broadleaved Tree Species in Mixed Growth of A Pure Pinus caribaea Plantation

Castanopsis fissa, Acacia auriculiformis, Artocarpus nitidus subsp. lingnanensis and Camellia oleifera were planted among rows and lines in one part of pure Pinus caribaea stand(G₁), Schima superba, Symplocos lancifolia, Carallia brachiata and Camellia oleifera were planted in another part of the pure Pinus caribaea stand (G₂). The nutrient and photosynthetic characteristics of broad-leaved tree species in these 2 remodeling modes were studied. Results showed that N, P, K concentrations in leaves of Acacia auriculiformis and Artocarpus nitidus subsp. lingnanensis at G₁ plot were high and the same as leaves of Carallia brachiata among at G₂ plot. Net photosynthetic rate, stomatal conductance, intercellular CO₂ concentration and transpiration rate decreased in the order of Acacia auriculiformis > Artocarpus nitidus subsp. lingnanensis > Castanopsis fissa > Camellia oleifera at G₁ plot, and in the order of Schima superba > Camellia oleifera > Carallia brachiata > Symplocos lancifolia at G₂ plot. The above results indicated that Acacia auriculiformis, Artocarpus nitidus subsp. lingnanensis and Schima superba were excellent tree species for stand transformation.