The result pointed out that the vertical distribution of foliage for each species was different,however,generally speaking,the foliage in upper crown (0.3CL) for broad-leaved species in natural secondary forest took a small percentage,about 10%;in middle or middle lower of the crown(0.4CL to 0.8CL) the branches here took the majority percentage of whole foliage,almost 60%to 75%;but in lower crown(0.8CL),there was about 10%of whole foliage.(5)The interspecies competition of trees in secondary forest was expressed by Hegyi competitioin index,and the active competitor was calculated by the competition zone radius and the tree position,DBH,and distance in the zone,it was not all competitors in tranditional calculation.The study introduced crown area overlap index to describe the crown competition between subject tree and its competitors,furthermore,the crown area was classified into 5 levels with a method of equal crown projection area,therefor,the resulting crown area overlap index showed more realities of existing stand conditons.(6)Based on the theoretics of multiply divide,the spatial strcture optimizing model of secondary forest stand selective thinning was developed by diversity mingling,aggregation index,competition index and crown area overlap index,also designed 10 constraint conditions which were related to forestry meanings,the objective function was solved by the implicit enumeration method with LINGO 9.0,using 0-1 integer programming.

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The paper , taking forest parks in the pearl river delta as an example , expounds several problems in forest park planning area , and principles and methods on delimitating the boundary of urban forest parks

摘要以珠江三角洲的部分森林公園為例一区二区综合，剖析城市地區(qū)森林公園規(guī)劃區(qū)存在的主要問題，并提出合理勘界的工作原則和方法女人18毛片九区毛片。

With thick forest and sound vegetation it is one of the forest treasure houses in central China and is also eulogized as immense forest of the west Hubei.

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The main content of studying in this dissertation are as follows: First, the dissertation defines the concept and intension that state- owned forest resources assets owned, sets up state- owned forest reserves goal system that assets run, and orientates the operation objective of state- owned forest resources assets according to the classified management of forestry .

第一，界定了國有森林資源資產(chǎn)運營的概念及其內(nèi)涵看A一级欧美黄色录像，建立了國有森林資源資產(chǎn)運營的目標體系噜噜吧先锋音av资源一百度，并按林業(yè)分類經(jīng)營的要求對國有森林資源資產(chǎn)運營目際進行了定位。

On the basis of the analysis of physicochemical properties of soil, analyzes variance characters of soil physical properties and nutrient properties in different land use ways and slope locations in the western edge mountains of Sichuan basin, and the results indicate that, in the respect of soil physical properties, it is either the soil structure coefficient or the degree of aggregation that is contained in farm land is obviously less than that is contained in reforested land and waste land, and because of the effects that forest crop root system and forest floor take, the soil physical properties of forest plantation is far better.

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The result indicated that other shrubberies, the land where the forest had not been grown up and the land being suitable for forest growing were the dominant styles of the forest resource landscape of the whole county.

結(jié)果表明欧美4438，其他灌木林免费看日本黄色视频、未成林造林地和宜林地是全縣森林資源景觀的主導類型；當?shù)卦炝至Χ却笙憬断憬豆患兑患睹涣謽I(yè)發(fā)展空間廣闊国产jiuse视频网站最新地址；景觀生態(tài)系統(tǒng)不穩(wěn)定。

People who live outside the forest need not in future appearbefore the royal justices of the forest in answer to general summonses,unless they are actually involved in proceedings or are sureties forsomeone who has been seized for a forest offence.

居住在森林外的人將來不需要在一般森林的王室審判傳喚時到庭午夜啪啪啪大片，除非他們涉入訴訟或者作為侵犯森林的嫌疑人的擔保人亚洲午夜久久久久久69。

Shen Nong top mist throughout the year the vast, bare rock, there is a long moss and ferns, are located halfway up on the bamboo forest, alpine fir forest and rhododendron forest.

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However remarkable impacts were observed in the plantation in terms of community physiognomy,community structure,species composition,species richness,and biomass accumulation.1 Planting trees made community structure simple.Betula alnoidis plantation had three layers including a dominant arbor layer,a complex and well developed shrub layer and a poorly developed vine layer.The arbor layer contained few species and had a single layer.The mountain rain forest had 4 layers including the dominant arbor layer,shrub layer,grass layer and vine layer.The vine layer was well developed and very rich in species composition,and the arbor layer contained as many as 38 species that could be grouped into 3 layers.2 Sequenced by the important value,main species for the plantation and the nature forest were totally different,and the plantation had one dominant species while the nature forest contained many dominant species.3 Planting trees changed the community physiognomy.

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The diversity index of broadleaved forest and bush, the evenness index of conifer forest and broadleaved forest,the dominance index of bare rock and farmland were higher than that in the other habitat types.

對5種不同生境類型的蝶類多樣性進行分析能直接看的黄色视频网址，物種多樣性指數(shù)最高的為落葉闊葉林和灌叢清纯唯美色五月，均勻度指數(shù)最高的為針葉林和落葉闊葉林，優(yōu)勢度最高的為裸巖和農(nóng)田WWWxxⅹCOM。