幼龄林

杉木幼龄林化学除草试验

Chemical Weed Control in the Young Growth of Chinese Fir

用材林幼龄林资产评估调整系数的确定

Studies on Modification Coefficient of Asset Evaluation of Young Growth for Timber Forest

模拟氮、硫复合沉降对杉木幼龄林植株C和N含量的影响

Effects of simulated deposition of nitrogen and sulfur on the contents of carbon and nitrogen in young Chinese fir plantation

林分直径分布，幼龄林呈倒“J”型，壮龄林近似于正态分布；

The stand diameter distribution of juvenile stand appears an inversed " J " form , and that of the half mature forest approximately a normal distribution .

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 .

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 .

防治该病的重点应放在林分平均高不超过10m的中、幼龄林。

InSAR Technology and Its Application to Estimate Stand Average Height It is suggested that controlling this disease should be put stress on the middle and young forest under 10m .

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 .

油松幼龄林竞争指标的初步研究

Preliminary study on the competitive index in Young Pinus tabulaeformis forest

中幼龄林抚育机械化工艺及机械系统探讨

Study on mechanical process and system of tending of culture

红松人工幼龄林调控技术的研究

Study on the Regulation and Control Technique of Korean Pine Young Stands

杉木幼龄林叶片营养元素含量与林木生长的相关性

Correlativity between growth and nutrient contents in foliage of young Chinese Fir Plantation

天然中幼龄林地位及经营措施的探讨

The role and management of natural juvenile and mid - aged forest stands

天然中幼龄林在森林资派中占有十分重要的地位。

Natural juvenile and mid-aged stands takes an important part in forest resources .

木荷造林技术及幼龄林生长量的研究

Studies on Afforestation Techniques of Schima superba and Increment of Its Young Forest

马尾松幼龄林干扰指数的研究

A study on interference index of Pinus massoniana

浙西山地马尾松幼龄林的绿色生物量和叶面积指数

Green Biomass and Leaf Area Index of Young Masson Pine Forest in Western Zhejiang Mountains

在幼龄林中，大叶胡枝子展现出本土树种良好的适应性。

In the young forest , Lespedeza davidii showed good adaptability as native tree species .

且中幼龄林不同保留密度直径结构也不同。

And the young middle aged forest in different retaining structures are also different density diameter .

加强中幼龄林抚育管理已是我国林业的紧迫任务。

It is emergent task to strengthen the management and tending of cultures in China forests .

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 .

在幼龄林时根际土壤中盐分积累的程度最高，随林龄增长根际土壤中盐分积累程度逐渐下降；

The extent of soluble salt accumulation of rhizosphere soil decreased with the increase of stand age .

峡江县人工湿地松中幼龄林进界胸径预估模型

Estimate Model of Ingrowth Diameter for the Middle and Young Artifical Forest of Pinus elliottii in Xiajiang County

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 .

一次性水肥措施对等密度107杨幼龄林胸径和郁闭度的影响作用分析

Effect of One-time Irrigation and Fertilization on the DBH and Crown Density of No.107 Poplar Plantations with Even Planting Density

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

采用平均标准木法对五倍子蚜虫夏寄主主要树种盐肤木和红麸杨人工幼龄林的生物量及其分配进行了测定和研究。

The biomass and its allocation of the young plantation of Rhus chinensis and R. punjabensis was determined with the average standard tree method .

黑龙山林场白桦幼龄林聚集程度比孟滦林场白桦幼龄林聚集程度较大。

Black dragon hill forest birch sapling forest aggregation degree than Luan of the first month forest birch sapling forest aggregation degree is bigger .

树高分布峰度在幼龄林阶段较尖锐（峰度值大于0），在中龄林、成熟林阶段较为平坦。

The height distribution kurtosis was sharper in young forest stage ( kurtosis value greater than 0 ), and was flatter in the middle stage .