毛竹(Phyllostachy pubescens)、杉木(Cunninghamia lanceolata)人工林生态系统碳贮量及其分配特征

研究比较了湖南会同林区毛竹、杉木人工林生态系统碳含量和碳贮量分配特征,结果表明,15年生杉木各器官碳含量在47.15%～50.43%之间,不同器官碳含量高低依次为树干、树叶、树皮、树枝、树根;毛竹不同器官碳含量波动在44.51%～49.91%,各器官碳含量高低依次为竹鞭、竹枝、竹叶、竹干、竹蔸、竹根,但是毛竹不同器官碳含量与年龄之间没有明显变化规律。林地土壤3个层次(60cm深)碳素含量为0.746%～2.390%,各层次碳素含量分布不均,表层(0～20cm)土壤碳素含量和碳贮量最高。毛竹、杉木人工林生态系统碳贮量分别为166.34tC·hm-2和150.19tC·hm-2,并且其碳贮量空间分布格局基本一致,土壤层是主要部分,其次为乔木层,林下植被层和凋落物层所占比例最小。其中,毛竹林土壤层有机碳贮量占83.92%,乔木层占15.38%,林下植被和凋落物层分别占0.38%和0.32%;杉木人工林土壤层碳贮量占62.03%,乔木层占34.99%,林下植被和凋落物层分别占0.70%和2.28%。另外,碳贮量在两个树种各器官中的分配,基本与各自的生物量成正比例关系。从植被年固定碳量来看,毛竹林为9.94tC·hm-2·a-1,相当于年固定CO2量为36.44tCO2·hm-2·a-1,是杉木林的1.39倍。

氮沉降下杉木(Cunninghamia lanceolata)人工林凋落叶分解过程中C、N元素动态变化

在12年生的杉木(Cunninghamia lanceolata)人工林中开展模拟氮沉降试验,分N0(对照)、N1、N2、N3等4种处理,N沉降量依次为0、60、120、240kgNhm-2a-1,每处理重复3次。通过2a的监测和分析发现,经N0、N1、N2、N3处理后,凋落物分解过程中C平均含量分别为46.47%、46.35%、46.79%、46.6%,各处理之间无显著差异,但均随着分解时间的增加呈下降趋势。氮沉降明显增加了凋落物中的N含量,且随着沉降水平的增加而增加。各处理凋落物C的分解系数依次为0.739、0.744、0.936、0.708,周转期为4.26a、4.26a、3.46a、4.41a;而N的分解系数分别为0.458、0.543、0.776、0.565,周转期为6.26a、5.44a、3.91a、5.20a。N1处理表现出促进N释放的作用,但对C释放影响不明显;N2处理促进了凋落物C、N元素的释放,而N3处理则表现出一定的抑制作用。氮沉降处理也明显降低了凋落物的C/N比,N1、N2、N3处理使C/N比分别比N0下降8.59%、14.20%和17.54%。

模拟氮沉降对杉木人工林(Cunninghamia lanceolata)土壤酶活性及微生物群落功能多样性的影响

在杉木人工林中开展模拟氮沉降试验,设计N0(对照)、N1(N 60 kg/(hm2.a))、N2(N 120 kg/(hm2.a))和N3(N 240 kg/(hm2.a))等4个氮沉降水平。通过连续7年的处理后,研究了外加氮源对土壤酶活性及群落功能多样性的影响。相同氮沉降处理下,参与土壤碳循环的6种主要酶(蔗糖酶、纤维素酶、淀粉酶、β-葡糖苷酶、多酚氧化酶、过氧化物酶)活性、土壤微生物群落碳源利用能力和多样性指数与均匀度指数均随土层加深而降低。氮沉降对纤维素酶和多酚氧化酶具有促进作用,而对淀粉酶和过氧化物酶表现出一定的抑制作用;中?低氮沉降(N1、N2)对蔗糖酶无影响,而对β-葡糖苷酶具有促进作用,高氮沉降(N3)促进了蔗糖酶活性,但抑制了β-葡糖苷酶活性。各土层中,低氮处理(N1)促进了微生物群落碳源利用能力和多样性指数与均匀度指数的增加,而中?高氮处理(N2、N3)则呈抑制作用。主成分分析表明,土壤微生物群落利用的主要碳源为碳水化合物和羧酸,不同氮沉降处理碳源利用类型存在差异。因此,氮沉降促进了表层土壤纤维素酶、多酚氧化酶和蔗糖酶的活性,但在一定程度上抑制了淀粉酶、过氧化物酶和β-葡糖苷酶活性;氮沉降增加改变了杉木人工林土壤微生物群落的功能多样性。

2008年初特大冰雪灾害对粤北地区杉木(Cunninghamia lanceolata)人工林土壤理化性质的影响

2008年8月,选择具有代表性的样地（受冰雪灾害较轻、受到冰雪灾害影响、受到冰雪灾害后皆伐清理样地）,用野外调查和室内分析相结合的方法,对广东省天井山林场杉木人工林土壤理化性质进行分析。结果表明：（1）粤北地区杉木人工林在受到冰雪灾害后,0-60 cm的土壤容重比未受到损害的上升8.1%-16.4%,孔隙度下降8.9%-11.9%,自然含水量减少17.1%-28.6%,皆伐清理后,土壤容重比未受到损害的下降1.5%~9.5%;孔隙度上升1.2%~5.9%,自然含水量增加44.2%~68.1%。（2）受损后,土壤pH值未发生变化,浅层（0-40 cm）有机质质量分数比未损样地下降（1.3%-9.4%）,深层（〉40 cm）有机质质量分数提高30.5%;各层土壤全氮、全磷、有效氮、有效磷和有效钾质量分数分别下降13.4%、30.3%、16.7%、37.6%和37.2%,全钾质量分数上升21.0%,且与未损样地的差异显著;土壤交换性钙和交换性镁大幅减少,分别为28.1%和43.4%。进行皆伐清理后,有机质质量分数比未损样地提高207.9%,土壤全氮、全钾、有效氮和有效磷质量分数升高138.7%、10.2%、161.3%和540.0%,全磷、有效钾、交换性钙和交换性镁的质量分数下降2.6%、9.0%、28.7%和24.3%,各土层变化不一致。（3）冰雪灾害的发生使杉木人工林林下土壤紧实度增加,不利于土壤呼吸、空气传导和土壤养分的累积;而经过清理后,土壤变得较为疏松,通透性增强,含水量增加,有利于土壤团粒结构的增强、土壤微生物活动和土壤养分的累积及转化。因此,冰雪灾害后对受损林地进行及时的清理对植被恢复重建尤为重要。

施氮对杉木-浙江楠(Cunninghamia lanceolata×Phoebe chekiangensis)混栽苗木生长与植株元素含量的影响

为了探究氮沉降背景下杉木和浙江楠混栽苗木的生长特征,于2019年5月模拟两种氮水平(对照0kg·hm^(-2)·yr^(-1)·N、施氮45kg·hm^(-2)·yr^(-1)·N)和三种混栽方式(每盆种植1颗杉木苗木、1颗浙江楠苗木,地上竞争被隔板完全隔绝,地下竞争由三种根系分隔方式控制竞争强度:塑料膜分隔-根系无竞争、尼龙网分隔-根系干扰性竞争、无分隔-根系完全竞争),2019年生长季(5月~12月)施氮处理并对杉木和浙江楠苗木生物量、根系形态和植株元素含量进行分析。结果表明:根系竞争对杉木和浙江楠苗木的根、冠生物量无显著影响(p>0.05)影响,但两种苗木的根系生长随着竞争的加剧而受到抑制作用,种间竞争特别是干扰性竞争能够促进植物对磷的吸收;施氮后,根系竞争促进了根、冠生物量的增加,并对冠生物量的增加更有利,同时,根系干扰性竞争的促进作用最明显。另外,两种苗木的根系生长随着竞争的加剧而受到促进作用。施氮和种间竞争均能促进植物对营养元素的吸收。

Dissolved organic carbon and nitrogen in precipitation, throughfall and stemflow from Schima superba and Cunninghamia lanceolata plantations in subtropical China

Despite growing attention to the role of dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) in forest nutrient cycling, their monthly concentration dynamics in forest ecosystems, especially in subtropical forests only were little known. The goal of this study is to measure the concentrations and monthly dynamics of DOC and DON in precipitation, throughfall and stemflow for two planta- tions of Schima superba (SS) and Chinese fir (Cunninghamia lanceolata, CF) in Jianou, Fujian, China. Samples of precipitation, throughfall and stemflow were collected on a rain event base from January 2002 to December 2002. Upon collection, all water samples were analyzed for DOC, NO3 -N, NH4 -N and total dissolved N (TDN). DON was calculated by subtracting NO3 -N and NH4 -N from TDN. The results - + - + showed that the precipitation had a mean DOC concentration of 1.7 mg·L-1 and DON concentration of 0.13 mg·L-1. The mean DOC and DON concentrations in throughfall were 11.2 and 0.24 mg·L-1 in the SS and 10.3 and 0.19 mg·L-1 in the CF respectively. Stemflow DOC and DON concentrations in the CF (19.1 and 0.66 mg·L-1 respectively) were significantly higher than those in the SS (17.6 and 0.48 mg·L-1 respectively). No clear monthly variation in precipitation DOC concentration was found in our study, while DON concentration in precipita- tion tended to be higher in summer or autumn. The monthly variations of DON concentrations were very similar in throughfall and stemflow at both forests, showing an increase at the beginning of the rainy season in March. In contrast, monthly changes of the DOC concentrations in throughfall of the SS and CF were different to those in stemflow. Throughfall DOC concentrations were higher from February to April, while relatively higher DOC concentrations in stemflow were found during September-November period.

Comparisons of carbon storages in Cunninghamia lanceolata and Michelia macclurei plantations during a 22-year period in southern China

Tree species composition was important for carbon storage within the same climate range.To quantify the dynamics of ecosystem carbon allocation as affected by different tree species,we measured the above-and below-ground biomass accumulation in 22 years,as well as the tissue carbon concentrations of trees in Cunninghamia lanceolata plantation and Michelia macclurei plantation.Results indicated that M.macclurei plantation significantly stored more carbon（174.8 tons/hm2） than C.lanceolata plantation（154.3 tons/hm2）.Most of the carbon was found in the soil pool（57.1% in M.macclurei plantation,55.2% in C.lanceolata plantation）.Tree and soil component of M.macclurei plantation possessed significantly higher carbon storage than that of C.lanceolata plantation（p 〈 0.05）.No significant difference was found in the carbon storage of understory and forest floor.These results suggest that the broadleaved species（M.macclurei） possesses greater carbon sequestration potential than the coniferous species（C.lanceolata） in southern China.

Concentrations and seasonal dynamics of dissolved organic carbon in forest floors of two plantations （Castanopsis kawakamii and Cunninghamia lanceolata） in subtropical China

The concentrations and seasonal dynamics of DOC in forest floors of monoculture plantations of Castanopsis kawakamii and Chinese fir （Cunninghamia lanceolata） were assessed in Sanming, Fujian, China （26°11′30″N, 117°26′00″E）. Forest floor samples were taken in January, April, July and October in 2002 and divided into undecomposed material （horizon Oi）, partially decomposed organic material （horizon Oe）, and fully decomposed organic material （horizon Oa）. Upon collection. DOC concentrations of samples were analyzed by a High Temperature TOC. The results showed that the annual average DOC concentration of Chinese fir （1341.7 mg·kg^-1） in the forest floor was higher than that of Castanopsis kawakamii （ 1178.9 mg·kg^-1）. Difference in DOC concentrations was observed among three horizons of the forest floor. DOC concentration of forest floor in the two forests was the highest in horizon Oe. Seasonal trends of DOC concentrations in different horizons of forest floors were similar and the maximal value occurred in autumn （or winter）. The concentration and temporal change of DOC in studied forests were probably related to the variation in moisture, temperature, biological activity and quantity of organic matter in the forest floor.

Improving the assessment method of seed vigor in Cunninghamia lanceolata and Pinus massoniana based on oxygen sensing technology

Oxygen sensing technology was employed to study the rapid methods for seed vigor assessment of Chinese fir （Cunninghamia lanceolata） and Masson pine （Pinus massoniana）. Firstly, seeds of five lots were performed using accelerated aging （AA） into three vigor levels. Then, four oxygen sensing indices, including increased metabolism time （IMT）, oxygen metabolism rate （OMR）, critical oxygen pressure （COP）, relative germination time （RGT） and the control indiees such as labora- tory germination indices, dehydrogenase activity （DA）, and electrical conductivity （EC） were analyzed by the tests of 15 samples. The results of correlation analysis between these indices and field emergence per- formances based on two-year and two-spot data showed that RGT and OMR should be indicated as the optimal oxygen sensing indices to rap- idly and automatically evaluate seed vigor of Chinese fir and Masson pine, respectively. On the basis, one-variable linear regression equations were built to forecast their field emergence performances by the two oxygen sensing indices.

Microbial biomass in subtropical forest soils： effect of conversion of natural secondary broad-leaved forest to Cunninghamia lanceolata plantation

到 Cunninghamialanceolata 种植园的自然第二等的阔叶的森林的变换是在副热带的中国的一个普通管理惯例。在这研究，我们比较了土壤物理化学的性质，在一天赋的微生物引起的生物资源第二等的 broad-leavedforest 和二 C。在土壤上估计森林变换的效果的 lanceolata 种植园地点在林地生态学的 Huitong 试验性的车站的微生物引起的生物资源，中国科学院。器官的碳，总氮， NH_4^+-N 和微生物引起的生物资源碳和氮多是的土壤的集中在 C 下面降低。lanceolata 种植园作为与自然离开 secondarybroad 的森林相比。在 C 的第一和第二旋转玷污微生物引起的生物资源 C。lanceolataplantations 仅仅是 53% ，那中的 46% 个分别地在自然第二等的阔叶的森林，和微生物引起的生物资源 N 里是 97% 和 79% 。到器官的 Cwas 也在种植园地点降低的土壤的微生物引起的生物资源 C 的贡献。然而，到总氮和 NH_4^+-N 的微生物引起的 N 的贡献在 C 是更大的。lanceolata 种植园地点。因此，到 C 的自然第二等的阔叶的森林的变换。lanceolata 种植园并且 C 的连续的种。lanceolataled 到在土壤的衰落微生物引起的生物资源和在副热带的中国的森林土的降级。

Litterfall production and nutrient return in different-aged Chinese fir(Cunninghamia lanceolata) plantations in South China

The amounts of litter produced and nutrients returned play a fundamental role in the productivity and biogeochemical and nutrient cycling of forest ecosystems.We monitored annual litterfall production, nutrient return,and monthly dynamics over a one-year period in Chinese fir plantations aged 10, 22, and 34 years. Our objective was to quantify litterfall and nutrient return over a complete harvest rotation of Chinese fir. Annual litterfall production increased with stand age and was recorded as（3,294.6 ± 360.4）,（3,733.9 ± 211.2）, and（4,876.1 ± 212.8） kg ha-1a-1in stands aged 10, 22 and 34 years, respectively. Total litter production was significantly greater in the stand aged34 years than in the stand aged 10 years（p ／ 0.05）. With the exception of miscellaneous components, needle litterfall constituted the highest proportion（27.5–43.6 %）, followed by branches/twigs（9.5–16.6 %）. In all three plantations,annual total nutrient return to soil was in the order of C（1,119.95–2,709.05 kg ha-1a-1） [ N（39.32–62.04 kg ha-1a-1） [ K（15.95–22.44 kg ha-1a-1） [ P（1.30–1.63 kg ha-1a-1）. C, N, K and P input to soil was significantly lower in the 10-year-old stand in comparison to the 22- and34-year-old stands（p ／ 0.05）. Litterfall production and nutrient return（C, N and K） followed similar patterns, and C and N input to soil was significantly related to litterfall production（needle, branch and total litterfall）. C, N, P and K input to soil and total litterfall production were mainly driven by needle litterfall.

Self-thinning lines and allometric relation in Chinese fir(Cunninghamia lanceolata) stands

We calculated a self-thinning exponent of 1.05 for tree mass using the 3/2 power equation in 93 Cunninghamia lanceolata plots.According to Weller’s allometric model,the self-thinning exponent for tree mass was calculated as 1.28 from the allometric exponents h and d.The both self-thinning exponents were significantly lower than 3/2.The self-thinning exponent of organs was estimated to be 1.42 for stems,0.93 for branches,0.96 for leaves,1.35 for roots and 1.28 for shoots,respectively.The self-thinning exponent of stem mass was not significantly different from 3/2,whereas thinning exponents of trees,branches,leaves and roots were significantly lower than 3/2.The stand leaf mass and stand branch mass were constant regardless of the stand density.The scaling relations among branch,leaf,stem,root and shoot mass（MB,ML,MS,MR and MA,respectively） showed that MB and ML scaled as the3/4 power of MS,whereas MS or MA scaled isometrically with respect to MR.

Effects of gap size on diversity of soil fauna in a Cunninghamia lanceolata stand damaged by an ice storm in southern China

Cunninghamia lanceolata （Lamb.） Hook. is economically the most important tree species in southern China and has been cultivated in plantations on a large scale. This species is widely used in construction, furniture, utensils and shipbuilding. Soil fertility of C. lanceolata stands affects soil structure, porosity and nutrient availability, which causes changes in fauna activity. During January to February 2008, an ice storm caused extensive damage to C. lanceolata stands. Despite the environmental importance of soil fauna, basic information on the distribution and diversity of soil fauna in C. lanceolata stands after ice storm damage is lacking. To assess the response of soil fauna diversity and distribution to forest gaps following the ice storm, five small gaps （each 30-40 m^2）, five large gaps （each 80-100 m^2） and five canopy cover plots were selected within a 2-ha C. lanceolata stand. Soil samples were collected from 0 to 10 cm depth in March 2011 to measure soil fauna diversity and abundance. The abundance and community composition of the soil fauna varied with gap size. In canopy cover sites, the number of individuals was 2.0 and 5.2 times greater than in the small gaps and large gaps. Three taxa （Nematoda, Oribatida and lnsecta） of soil inver- tebrates occurred commonly, and Nematoda dominated the communities in all three habitat types. The Shannon-Wiener diversity index, Margalef diversity index, and Pielou evenness index were high in the small gaps, indicating that they harbored the most species, with the most even distribution, and the highest diversity. Our results indicated that gap size apparently affected abundance and community composition of the soil fauna.

Biomass Productivity of Taiwania flousiana Plantation and Successive Rotation Plantation of Cunninghamia lanceolata in Cutover Forest Land of C.Lanceolata

[Objectives] The aim was to reveal the accumulation characteristics and differences of biomass productivity of Taiwania flousiana plantation and successive rotation plantation of Cunninghamia lanceolata .[Methods] The biomass and productivity of the 23-year-old T. flousiana plantation and successive rotation plantation of C. lanceolata were studied at Nandan Shankou Forestry Farm of Guangxi., China.[Results] There were differences in the biomass distribution of different organs of T. flousiana plantation and successive rotation plantation of C.lanceolata. The biomass for the T. flousiana plantation was distributed in the order of stem 〉 branch 〉 leaves 〉 bark, and the successive rotation plantations of C. lanceolata was stem〉 root 〉 branch 〉 bark 〉 leaves. The biomass of tree layer of 23-years-old T. flousiana plantation and successive rotation plantations were 195.21 and 136.82 t/hm^2, respectively, including 113.32 and 87.91 t/hm^2 of economic biomass （stem）. The annual net productivity of tree layer of the 2 plantations were 8.49 and 5.95 t/（hm^2·a）, respectively, including 5.14 and 3.82 t/（hm^2·a） of stem. Therefore, T. flousiana plantation has higher biomass accumulation ability than that of successive rotation plantations of C.lanceolata, and can be used as an excellent substitute tree species for the regeneration of C.lanceolata cutover plantation.[Conclusions]

Effects of simulated acid rain on root growth of Cunninghamia lanceolata and Schima superba saplings planted in acidified soil

Results from pot culture (with one-year old Cunninghamia lanceolata and Schima superba) are described. It was found that the biomass production and elongation of C. lanceolata was seriously inhibited at pH 2.0 rain, but for S. superba, was not affected markedly. When pH values of experimental rain were higher than 2.0, the root growth of both species was not adversely affected. Aluminium had already accumulated to some degrees in the roots of both trees, and started to affect the root growth of C. lanceolata at pH 2.0 rain. The soil chemistry was also examined. Increased acidity of experimental rain increased the leaching of Ca and Mg. The Al/Ca mol ratio increased from 0.3 to 0.9 in top soil, and in rhizosphere to 1.5 when the pH values of simulated acid rain were 4.5 to 2.0. In this experiment, NO3- fertilization effect was discovered.

A New Bislabdane-type Diterpenoid from cunninghamia lanceolata

A new bislabdane-type diterpenoid lanceolactin (I), was isolated from the roots of Cunninghamia lanceolata. Its structure was elucidated on the basis of spectroscopic methods, especially 2D-NMR techniques.

VARIATION PATTERN OF WOOD PROPERTIES OF NATURALCUNNINGHAMIA LANCEOLATA

In thes paper, the variation pattffe of wood Prpebo was edied for natural Cunninghamia lanceolata. The mathematical models of property were obtained on tracbeidlength, microfibril angle, late wood percdsgn, growth ring width and growth ring dsisity in the radial direction. The interrelation were analynd between tracheid length and microfibril angle. The result can provide sciatilic theory basis for wood utilhaion and early prediction of wood properties .

酚醛树脂/蒙脱土浸渍改性杉木工艺及密实化研究

以酚醛树脂和蒙脱土混合后溶液为改性剂,正负压仿呼吸环境下浸渍改性杉木板材,探讨了负压压力、负压时间、正压压力、正压时间对杉木板材增重率的影响;通过正交试验确定最佳处理工艺,在最优工艺浸渍杉木板材基础上进行压缩密实化处理,分析改性后杉木的密度、增重率、表面硬度、力学性能、尺寸稳定性和阻燃性,并通过扫描电镜和红外光谱对木材微观形貌、官能团进行表征。结果表明:当负压压力–0.095 MPa、负压时间20 min、正压压力1.5 MPa和正压时间1.5 h,改性杉木的增重率最大。在此浸渍工艺处理下,压缩密实化处理后的杉木密度由0.328 g/cm3提升至0.784 g/cm^(3),静曲强度、弹性模量和表面硬度分别提升了34.7%、38.4%和85.6%;尺寸稳定性结果表明改性杉木的吸水率和体积膨胀率明显降低。扫描电镜表明改性剂主要通过管胞、射线细胞和纹孔渗透,且木材内部孔隙被很好地填充。红外分析表明木材内部游离羟基减少,缔合羟基和醚键数目增多,木材内部引入Si-O-C键,耐火试验结果表明改性材具有良好的阻燃效果。

闽楠-杉木人工混交林混交比对闽楠生长形质和空间利用能力的影响

为了分析混交比例对闽楠-杉木人工混交林中闽楠生长形质性状、空间利用能力的影响,明确珍贵用材树种闽楠的经营方向,以江西省分宜县上村实验林场6年生闽楠-杉木人工混交林和闽楠纯林为研究对象,分析不同混交比例处理对闽楠生长、干形形质、空间利用能力的影响,并通过主成分分析方法综合评价不同混交比例的闽楠生长表现,筛选出最佳混交模式。结果表明:(1)混交处理促进了闽楠生长,改善了闽楠干形形质。2楠1杉混交处理中,闽楠的胸径、树高、单株材积、枝下高、枝下高比例均为最大,分别比闽楠纯林增加了21.44%、31.78%、79.41%、48.00%、30.23%(P<0.05);但尖削度和胸高形数均小于闽楠纯林,尖削度和胸高形数分别降低了24.43%、7.20%。(2)混交处理提升了闽楠的空间利用能力。混交林的平均冠幅、冠高、树冠体积、树冠表面积、生长空间指数均显著高于闽楠纯林,各指标分别提高了6.49%~10.27%、11.28%~27.89%、45.36%~86.09%、27.56%~44.39%、13.24%~36.76%;但混交林的树冠圆满度均低于闽楠纯林。(3)混交处理能够改善闽楠的生长特征和空间利用能力,综合评价得分由高到低依次为2楠1杉(2.282)、1楠1杉(1.479)、3楠1杉(0.973)、纯林(-1.365),2楠1杉混交处理为最优混交比例。因此,营建闽楠-杉木人工混交林可提升闽楠的生长形质和空间利用能力。

湖北杉木人工林生物量及其可变密度预估模型研究

利用6~59年生杉木人工林190个标准地资料和517株样木生物量测定数据,以建立的单木生物量估算方程为基础推算出各林分单位面积生物量,并基于林龄、立地指数以及7种不同林分密度指标构建并选择最优的全林分生物量预估方程,研究湖北杉木人工林林分生物量及其变化规律。结果表明:该区域杉木人工林平均单株生物量为52.8893 kg,以胸径和树高为变量的二元单木生物量方程的拟合优度为0.91,其拟合优度和精度更高;林分平均单位面积生物量为101.4923 t/hm^(2),总体上呈随林龄增加而增大的趋势;基于多元回归技术的经验方程构建了含7个林分密度指标和不含密度指标共计16种林分生物量预估模型,包含林分立木株数和林木大小信息的林分密度指标的模型均达到了较理想的拟合效果,其中密度指数SDI的Schumacher修正收获模型精度最高,确定系数为0.95,检验精度为97%,对本区域杉木生物量估算具有较好的适用性,能为其人工林经营和质量提升提供参考与支持。