杉木林林下植被及其生物量的研究

STUDIES ON UNDERSTORY AND ITS BIOMASS IN CHINESE FIR STANDS

近年来的一些研究表明,杉木人工林地力衰退日趋严重,维护和提高杉木林地地力已成为杉木人工林发展的重要课题。林下植被是人工林生态系统的一个重要组成部分,在促进人工林养分循环和维护林地地力中起不可忽视的作用。研究林下植被生物量的积累与分配规律及与立地、林分的关系,是研究并利用林下植被的重要前提。有关林下植被生物量的研究,始见于20世纪中叶,但鲜见有关林下植被生物量的专题研究报道,杉木林下植被生物量的测定也只局限于杉木人工林养分循环的系列研究。本文对杉木人工林林下植被生物量的系统研究丰富了上述系列研究的内容,同时也为利用林下植被来维护和提高林地地力提供科学的依据。

The development of understory in the Chinese fir stand in the Dagangshan, and the law of its biomass accumulation and allocation have been discussed in this paper. The relations of understory, the growth of Chinese fir trees, and site types have been expounded. The results indicate that understory develops quickly and its biomass could accumulate 4—5 t/ha in 4—5years. Therefore, it provides the scientific basis for further investigating how to use the understory and conserve and increase the Chinese fir forestland capablity.