摘要：Net photosynthetic rates(Pn) were measured in 18-month-old seedlings of Machilus pauhoi from two provenances of Suichuan in Jiangxi and Jian’ou in Fujian using a LiCor LI-6400 portable photosynthesis system(LiCor Inc.,Lincoln,NE,USA) with a LED light source. The other photosynthetic parameters,including maximum net photosynthetic rate(Pmax),apparent quantum yield(AQY),light saturation point(LSP) and light compensation point(LCP),were also detected in response to irradiation. The results showed: The average P max,AQY,LSP and LCP of the seedlings from the two provinces were 12.65 μmolCO2.m -2 s -1,0.052 7 μmolCO2.μmol -1 photons,1 120.99 μmol.m -2 s -1 and 18.03 μmol.m -2 s -1 respectively. There were significant differences between the two provenances in the all photosynthetic parameters except for AQY. The provenance of Suichuan performed better than that from Jian’ou with higher P max,AQY and LSP of 30.48%,4.66% and 25.70% respectively,though the LCP of Suichuan provenance was higher and needed stronger illumination. There was more variation in P max,AQY,LSP and LCP between the two provenances than that within the two provenances. There were significant differences between the upper and lower crown layers with higher P max and AQY in the upper crown,while there was no difference in LCP and LSP between the two crown layers due to the integrated influence of the shape of seedling crowns and the photosensitivity of leaves.

摘要：按照不同基肥种类、混交树种、混交方式与造林株行距设计9种刨花楠粉用工业原料林造林方案。通过对各方案中的刨花楠平均直径、平均高及平均木生物量的对比分析,提出了刨花楠粉用工业原料林的造林技术与方法。研究结果表明:造林8年后,刨花楠平均胸径、平均高、平均单株材积与平均单木生物量分别为8.02cm、5.96 m、0.01743 m3和23.656 kg。各造林方案中刨花楠生长量存在一定的差异,以方案9(纯林、造林株行距2.5 m×2.5 m,基肥为干粪肥+氯化钾+脲素+钙镁磷)为最好,其平均胸径、平均高与平均单木生物量分别为9.76 cm、6.57 m和37.3565 kg。土壤肥力及其养分结构对其生长有显著影响,应选择土壤肥沃、空气湿润、立地条件较好的阴坡或半阴坡的林地造林。以营造刨花楠纯林或刨花楠与湿地松或杉木等针阔混交林为好,可采用小块状混交或垂直等高线纵向行状混交方式进行造林。造林后,应加强对造林苗木的抚育管理。

摘要：基于对我国南方集体林区森林经营和林业发展中存在问题的认识 ,指出了影响该区域森林可持续经营的主导因素 ,提出了该区域森林可持续经营应以森林生态系统经营为实现途径 ,以社会林业为主要组织形式 。