杉木人工林凋落物动态及其与气候因素的相关分析

ANALYSIS ON THE LITTER-FALL DYNAMICS OF CHINENSE FIR PLANTATION AND ITS CORRELATION TO CLIMATIC FACTORS IN NORTH GUANGXI

This paper deals v ith a part of stationary research on the forest ecosystems in Guangxi and relates to the production, components and seasonal pattern of litter-fall in chinense fir (Cunninghamia lanceolata) plantation as well as climatic characteristics over a 5-year-study-period in North Guangxi. The results show that the mean annual litter in chinense fir plantation is 4.621 t/ha with Cv of 19.40-28.34% in Liluo. The rate of each component of litter-fall is ver stable with in S.D.<5 %. The leaf fraction is 46.47% of annual total litter-fall in chinense fir forest; twig fraction, 18.47% cones fraction, 16.91%;and miscellaneous franction,18.21%. The seasonal pattern of litteting exhibits a distinct peak from the late autumn to early spring as the weather gets colder and drie (Nov. to Apr.) The correlation between 17 climatic factors and litter-fall characters is anal sed quantitativel . The lo er tem-perature dry and wind have been identified as the key -factors influencing the production and dy namics of the litter in chinense fir plantation.