摘要
对福建三明杉木观光木混交林中杉木和观光木细根分解过程中干质量热值、能量残留率、能量年归还量及释放量进行了系统的研究,结果表明,细根在分解过程中干质量热值呈递减趋势变化.同一树种细根径级越小其能量残留率也越小.杉木细根的年能量归还量为2.8184×106J.m-2,观光木细根的能量年归还量为0.6435×106J.m-2,在不同径级细根能量年归还量组成中,两个树种的<0.5 mm径级细根的能量年归还量均占60%以上,表明在细根的能量流动中,<0.5 mm细根起着重要的作用.杉木细根的能量年释放量为1.8187×106J.m-2,观光木细根的能量年释放量为0.5864×106J.m-2.
Systemic study was carried out to determine gross caloric value, energy remnant rate , energy annual return and release during decomposition of fine roots in a mixed forest of Chinese fir （ Cunninghamia lanceolata （Lamb.） Hook. ） and Tsoong＇s tree （ Tsoongiodendron odorum Chun） in Sanming, Fujian, China. Gross caloric value of fine roots decreased during decomposition . The rate of energy release increased with decreased diameter size of fine roots for the same tree species. The annual return of energy for fine root of Chinese fir and TsoongioderMron odorum were 2.8184×10^6 J. m^-2 and 0.6435×10^6 J. m^-2, The annual energy return of fine roots （〈 0.5 mm） account for than 60% in both species with different diameter. This indicated fine roots （〈 0.5 mm ） play a very important role in energy flow. The annual release of energy for fine roots of Chinese fir and Tsoong＇s tree were 1. 8187×10^6 J. m^-2 and 0.5864×10^6 J. m^-2.
出处
《福建师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2005年第3期61-64,共4页
Journal of Fujian Normal University：Natural Science Edition
基金
福建省自然科学基金资助项目(B0010022)
关键词
杉木
观光木
细根
干质量热值
能量残留率
能量年归还量
Chinese fir
Tsoonggodendron odorum
fine roots
gross caloric value
energy remnant rate
energy annual return
