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CHEN YinglongResearch Institute of Tropical Forestry Chinese Academy of Forestry Guangzhou . China 《中国林业科技(英文版)》2002,(2)
Song Rong (i.e. Matsutake, Tricholoma matsutake) is the most favorite edible mushroom in Japan and restrictedly distributes in forests in East Asia. The yield of Song Rong, however, has been extremely dropping since 1940 's in the region due to changes of environmental ecology of nature forests. As a compensation for consumption, Japan imported products of T. matsutake from Korea and China, and T. magnivelare from North America since mid-1970s, but T. matsutake stili accounts for a large portion of the import components. About 6,000 to 7,000 ton of fresh Matsutake mushrooms were transported to Japanese markets, one fourth of these were harvested from uplandforests in Yunnan Province, southwest China. On the basis ofa case study of Song Rong in the Zixi Mountain Area of Chuxiong, Yunnan Province, this paper pays great attention to the sodai, economical and ecological aspects and issues relative to the production and sustainable management are addressed. 相似文献
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Tomohiro Nishizono Kunihiro Tanaka Kazuo Hosoda Yoshio Awaya Yasuhiko Oishi 《Journal of Forest Research》2008,13(5):264-274
We analyzed data from 28 long-term experimental monitoring plots installed in Japanese cedar (Cryptomeria japonica D. Don) plantations in northeastern Japan to examine how site productivity and thinning practices relate to culmination in
stand growth. Site productivity and thinning practices in the plots were evaluated by site index (dominant tree height at
40-years old) and by cumulative thinning rate (cumulative thinning volume divided by cumulative gross production during the
entire period of measurement). Culmination of stand growth was evaluated by culmination age of the mean annual increment (MAI)
and its maximum value (Max MAI). Max MAI for the mean annual gross increment (MAIgross) and mean annual net increment (MAInet)
increased with increasing site index, but did not change with cumulative thinning rate. Culmination age for MAIgross decreased
with increasing site index, but did not change with cumulative thinning rate. Culmination age for MAInet decreased with increasing
site index. Additionally, culmination age for MAInet increased with increasing cumulative thinning rate in sites with a high
site index (>19.3 m) but not in those with a low site index (<19.3 m). These results indicate that thinning extends the culmination
age without changing Max MAInet under high site productivity. Therefore, thinning increases total net yield in sites with
high productivity based on a long-term perspective. 相似文献