中龄林

研究结果表明P缺乏是马占相思中龄林生长的主要限制因子。

Results indicate that P deficiency was a main limit for the plantation productivity .

在幼龄林时，根际土壤的CEC值与非根际土壤相近，而在中龄林和近熟林阶段均小于非根际土壤；

The CEC value of rhizosphere soil was lower than that of non-rhizosphere soil in half-mature stage and near-mature stage .

兴安落叶松（Larixgmelini）幼中龄林的生物量与碳汇功能

Biomass and carbon pool of Larix gmelini young and middle age forest in Xing ′ an Mountains Inner Mongolia

Cu、Zn、Mn含量，从幼龄林至中龄林呈大幅度下降，中龄林至近熟林在非根际土壤中略有恢复。

The contents of Cu , Zn , Mn , decrease greatly from young stage to half mature stage , and rehabilitate a little from half mature stage to near mature stage in non rhizosphere soil .

研究结果表明：杉木幼龄林、中龄林及近熟林样地土壤中有机养分和无机养分含量，除去幼龄林土壤中全K之外，均是根际土壤养分含量高于非根际土壤。

The results show that the contents of organic and inorganic nutrients in the rhizosphere soil of young , half mature and near mature Chinese fir of first rotation are more than those in non rhizosphere soil , except for total K in young Chinese fir plantation .

不同密度对杉木中龄林生长的影响

Effects of Different Densities on the Cunninghamia Lanceolata in Middle Age

马尾松人工中龄林施肥肥效与增益持续性研究

Fertilization Effectiveness and Gain Sustainability of Middle aged Pinus massoniana Plantation

杉木中龄林施肥效应探讨中国林蛙在人工生态系中的生物学特性

Growth Response to Fertilization in a Middle-aged Plantation of Chinese Fir

由成过熟林占据绝对优势演变为幼中龄林占优势的结构，很难实现可持续。

It 's difficult to realize sustainable development .

幼、中龄林一般采用成本方式估价方法；

Cost valuation method is generally used to evaluate young growth and middle-aged forest ;

落叶松幼中龄林主要测树因子生长规律的研究

Study on growth pattern of principal measurement factors in young-and middle-aged stands of larch

杉木中龄林树冠叶面积密度空间分布及季节变化

Spatial Distribution and Seasonal Changes of Needle-leaf Area Density within 17-year-old Chinese Fir Crown

施肥对马尾松中龄林生长量和产脂的影响

Effects of fertilization on the growth and resin yield of middle-aged forest of Pinus massoniana

林分土壤在中龄林至成熟林阶段的碳汇能力不断提高。

The ability of soil carbon sink from half-mature stand to mature stand improved continuously .

河南引种火炬松种源中龄林木材基本密度的变异

Variation of Wood Density Among Provenance of Exotic Loblolly Pine Grown in South of Henan Province

幼龄林平均胸径与密度的关系表现为正相关，中龄林为负相关。

Sapling forest between average DBH and density were positive correlation , negative in the mid-maturation forest .

对福建马尾松幼龄林、中龄林和成熟林生态系统中各组分的含碳率和碳贮量进行了比较研究。

The carbon content and carbon storage of Pinus massoniana Lamb at different growing stages were measured .

而中龄林的碳贮量最多，过熟林碳贮量最少。

The most carbon storage are middle age forests , and the least are excess mature forests .

坡向、坡位对水曲柳中龄林生长与生物量分配的影响

Influence of Aspect and Position of Slope on the Growth and Biomass Allocation of Mid-age Fraxinus mandshurica

孟滦林场在白桦中龄林混交程度较小，只有两种树种。

Luan of the first month in the birch forest mixed forest is less , only two species .

森林资源的结构不太合理，中龄林和近熟林面积占据较大比例，中龄林和近熟林的蓄积量有所增加，成过熟林的蓄积明显减少；

The structure of forest resources was unreasonable : the proportions of immature and near-mature forests were larger ;

幼龄林阶段树高偏度较大于中龄林和成熟林。

The height skewness of young stage forest was larger than the middle stages forest and mature stages forest .

杉木幼中龄林速生丰产可行性的研究

The feasibility of tending fast growing , high yielding forests out of young and middle-aged stands of Chinese fir

作者指出，对该区的中龄林应进行抚育采伐，成过熟林应强化开采，否则，每年将损失11亿元。

The author indicates that attending felling should be speedily exploited or annual loss would be 1100 million yuan Per year .

河南火炬松种源中龄林生长量、干形特征的差异分析

The Difference Analyses of Tree Growth Characteristics Among Provenance of Exotic Loblolly Pine Planted in South of Henan Province of China

林下植物的物种丰富度指数、各多样性指数和均匀度指数均表现出成熟林>幼龄林>中龄林的趋势

The richness index , diversity index and evenness index of understory plant show mature forest > young forest > middle aged forest

滨海土壤化学因子对刺槐中龄林生长影响的研究

The effects of the chemical factors of soil on the growth of middle aged forest of black locust on the sea shore

在中龄林土壤中细菌和放线菌的数量最少，真菌数量则随着树龄不断增大呈增加的趋势；

Quantity of bacteria and actinomycetes is the lowest in the middle aged soil and quantity of fungi rises while time goes by .

在中龄林中，林药模式构建的灌木层物种丰富，形成的群落结构最好。

In middle age forest , it was rich in species in the shrub layer of forest-medical plant mode with the best community structure .

中龄林阳性先锋树种优势度明显，演替层树种组成最丰富。

The dominance of the pioneer species is obvious in the middle-year forest . And the species in the succession layer is most abundant .