PJB-2024-160
Short-term Effects of Different Mixed Tree Species on the δ
Wei Zhou
Abstract
Abstract 【Purpose】This study investigates the short-term effects of different mixed tree species on nitrogen cycling and transformation in Pinus massoniana, to provide scientific basis for constructing mixed forests of Pinus massoniana. 【Methods】Using indoor simulation experiments, six mixed tree species were selected for row-shaped mixed planting with Pinus massoniana in a ratio of 1:1, the content of δ15N in rhizosphere soil and coniferous leaves of Pinus massoniana was analyzed, and its comprehensive effects were analyzed using a principal component analysis method. 【Results】The research results indicate that different mixed tree species have a significant impact (P<0.05) on the δ15N in rhizosphere soil and coniferous leaves of Pinus massoniana, with the highest δ15N (7.68%) in rhizosphere soil treated with CH-M, the lowest δ15N (0.45%) in coniferous leaves, and high δ15N in both rhizosphere soil and coniferous leaves treated with MH-M and SM-M. 【Conclusions】The comprehensive effects were analyzed using the principal component analysis method, with the results SM-M>MH-M>QM-M>CH-M>FX-M> M-CK>XZ-M, showing that mixed mixture of Cunninghamia lanceolata (Lamb.) Hook., Schima superba Gardn. et Champ. and Pinus massoniana produce the best short-term comprehensive effect.
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