[Dynamics of phenolics content of Chinese fir stump-roots and the rhizosphere soil and it's allelopathy].
Studies on the releasing pattern of phenolics during the decomposition of Chinese fir stump-root and on its allelopathy show that the phenolics contents in stump-roots decreased with their decomposition. Roots had a higher content of phenolics than heart stumps, and edge stumps had the least. The phenolics was released during decomposition, and accumulated in the soils around stump-roots. Pot culture experiment showed that phenolics affected the germination of Chinese fir seeds. The correlation analysis between the density of Chinese fir stump-root and the tree height and base diameter (BD) of its saplings proved that Chinese fir stump-roots had a negative impact on the growth of the next generation of Chinese fir plantations. It is suggested that the traditional operation of Chinese fir plantations should be reformed, and the stump-roots should be cleared from woodland before reforestation.
Huang
Z
Z
Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110015. zqhuang@iae.syb.ac.cn
Liao
L
L
Wang
S
S
Lui
Y
Y
D010636:Phenols / Q000032:analysis*; D012987:Soil / Q000032:analysis*; D014197:Trees / Q000737:chemistry* / Q000254:growth & development
D010636:Phenols; D012987:Soil