关键词: 杉木, 生态公益林, 凋落物, 植物多样性, 生态效益

Abstract:

Thirty-two sampling plots of ecological public-welfare forest that distributed in fourteen counties were investigated in over 100 000 km² zones of Zhejiang Province. Five quadrats were set in every plot by using diagonal method. From March 2000 to March 2001, litters were collected and analyzed every month. The results showed: In juvenile, middle-aged and mature stands Chinese Fir as the dominant species, the average annual litter productions was 56.2, 121.5 and 327.2 g·m^-2 a^-1 respectively. There was no significant difference at annual litter among Northwest, Middle, South and seaboard region of Zhejiang Province (p>0.05). The production ratio of the defoliation to the total litter was about 76.0%～96.4%, The litter component varied in distinct aged stands. The litter production of Chinese Fir dominance forest was less than that in mixed forest containing Chinese Fir; the more the species of arbor, the less the dominance of Chinese Fir, and the more the litter production. Chinese Fir dominance forest was not benefit on soil self-fertilization, keeping water and vegetation restoration deeply.

Key words: Cunninghamia lanceolata, ecological public-welfare forest, litterfall, plant diversity, ecological benefits