通过对福建柏和杉木凋落物分解和N、P、K 养分动态为期750 天试验研究，结果表明：福建柏和杉木落叶和落枝分解速率与时间呈指数关系，第1年干重损失率分别为83.47%和19.43%、60.78%和25.02%。落叶分解过程中， P 浓度增加，而K 和C 浓度下降；但落叶N浓度，福建柏的先升后降，而杉木的则单调上升；落枝分解过程中各元素浓度均呈现：N 单调上升，K和C单调下降，P 先升后降。落叶和落枝的元素分解速率均以K最大，其次为C和P，N最小。福建柏落叶元素年分解速率，N、P和C比杉木的大，但K 却比杉木的小；而福建柏落枝元素年分解速率C和N比杉木的大，而P 和K 却比杉木的小。福建柏落叶和落枝分解过程中N、P、K的年养分释放量分别为2.630、0.162和1.604g•m-2，分别是杉木（1.205、0.143和1.129g•m-2）的2.18倍、1.13倍和1.42倍。与杉木林相比，福建柏林凋落物分解过程中养分释放量高，且养分释放/归还比值亦大，表明福建柏林凋落物养分周转比杉木快，这对维持林地土壤肥力是有益的。

A Chinese fir forest (Cunninghamia lanceolata, CL) and a secondary evergreen broadleaved forest (BF) located in Fujian Province, south-eastern China, were examined before clear-cutting to compare their ecosystem carbon and nitrogen pools (above-and below-ground tree, understorey vegetation and forest floor biomass + 0-100cm mineral soil layer). The ecosystem pools of C and N in the CL before clear-cutting were 257 Mg ha−1 and 8605 kg ha−1, respectively. The corresponding values for the BF were 336 Mg ha−1 of C and 10,248 kg ha−1 of N. For the two forests, most of the C was in the trees, whereas most of the N pool was in the soil. C and N pools in understorey vegetation and forest floor were small in the two forests (about 2% of ecosystem pools). During clear-cutting, 117 Mg ha−1 C and 307 kg ha−1 N in stem wood with bark and coarse branches (>2 cm) were removed from the CL compared to 159 Mg ha−1 C and 741 kg ha−1 N from the BF. Two days after slash burning, C removal from logging residues (including forest floor material) was estimated at 10 Mg ha−1 for CL and 23 Mg ha−1 for BF, and N removal was 233 and 490 kg ha−1 in the CL and BF, respectively. Compared with the pre-burn levels in the CL, contents of topsoil organic C and total N 2 days after burning were reduced by 17 and 19%, respectively. In the BF, the corresponding proportions were 27% (C) and 25% (N). Our results indicate that clear-cutting and slash burning had caused marked short-term changes in ecosystem C and N in the two forests. How long these changes will persist needs further study.

通过对福建三明格氏栲天然林及在其采伐迹地上营造的33年生格氏栲人工林和杉木人工林枯枝落叶层现存量与季节动态、C库及养分库的研究表明，格氏栲天然林、格氏栲人工林和杉木人工林枯枝落叶层现存量分别为8.99t•hm-2、7.56t•hm-2和4.81t•hm-2；枯枝落叶层中叶占现存量的比例分别为64.96%、61.38%和38.05%，枝占比例分别为31.59%、37.83%和42.62%。格氏栲天然林与人工林枯枝落叶层现存量最大值均出现在春季，而杉木人工林枯枝落叶层现存量最大值出现在夏季。格氏栲天然林枯枝落叶层C 贮量为4.02t•hm-2，分别是格氏栲人工林和杉木人工林的1.22倍和1.77倍；格氏栲天然林和人工林枯枝落叶层C 库与杉木人工林的差异均达到显著水平（P<0.05）。格氏栲天然林、格氏栲人工林和杉木人工林枯枝落叶层养分贮量分别为138.42kg•hm-2、113.56kg•hm-2 和72.39kg•hm-2；除Mg外，格氏栲天然林枯枝落叶层中各种养分贮量均最高。与人工林相比，天然林枯枝落叶层现存量、C和养分贮量均最大。枯枝落叶层对林地长期生产力维持具有重要作用。

通过对福建三明相邻的27年生混交比例为2行杉木和1行观光木的混交林和杉木纯林群落细根分布特点的研究，结果表明，杉木和观光木行间的杉木细根密度虽比杉木与杉木行间的低8.5%，但观光木与杉木之间的观光木细根密度则比杉木与杉木行间的高152.09%，其细根总密度比杉木与杉木行间的大10.43%。混交林杉木各径级活细根密度呈单峰型分布，均以5-10cm土层最大；而观光木各径级活根主要分布在0-10cm土层内。纯林杉木各径级活细根密度亦基本呈单峰型分布，但峰值出现在10-20cm或20-30cm土层。不同树种不同径级死细根的分布均与其各自的活细根分布相似。混交林灌木细根密度在30-40cm最大，而纯林灌木细根集中于表层0-10cm；混交林和纯林草本细根均集中在0-5cm土层。与纯林的相比，混交林中杉木细根主要分布层次明显上移，混交林群落表层土壤细根所占比重增大，这对土壤资源高效利用及促进群落生产力提高有利。

通过室外定位观测前期连续干旱情况下天然降雨及室内模拟不同温度（10℃、19℃和28℃）下测定格氏栲天然林、格氏栲人工林和杉木人工林土壤增湿后呼吸动态，探讨不同林型土壤呼吸对土壤干湿交替的响应。结果发现室外定位观测和室内模拟试验均出现了增湿后土壤呼吸骤升至最大值及随后逐渐衰减的现象，且这种变化可由时间过程模型（R=ate-bt+c）较好地进行拟合。温度升高提升了土壤呼吸对干湿交替的响应值RV。格氏栲天然林土壤呼吸对干湿交替的响应对温度最为敏感，随温度升高其响应指数RE 增加；杉木林土壤呼吸对干湿交替的响应指数RE最高，且对土壤水分变化最敏感，但随温度升高超过一定限度后其响应指数RE 反而降低。