查询词典 selection forest

In chapter 4, the restoration and rehabilitation technology of multiple functional forest system were studied. Firstly, it was expounded that we should restore and rehabilitate watershed protection forest in source of rivers, in catchment areas of small watersheds and around reservoirs, which includes protecting the present natural forests and planting watershed protection forests in the non-forest land. The main afforestation models comprises "Cupressus funebris + Alnus cremastogyne or Robinia pseudoacacia}","Pinus massoniana + Camellia oleifera (or Robinia pseudoacacia","Populus + Robinia pseudoacacia ", etc.

首先阐述了应在河流源头、小流域集水区和水库周围恢复和重建水源涵养林，这包括保护好现有天然林和在无林地营造水源涵养林，主要林种组合模式有&柏木＋梢木（或刺槐丫'／'马尾松＋油茶&、&杨树＋刺槐&等；其次着重论述了坡地水土保持林体系的重建技术，这包括工业原附、经济林、薪炭林、混农林业和退耕还草还牧等的经营和 A 建设技术；接着简要介绍了林牧业产业化途径。

Biomass in the rain forest was far more than that in the plantation of 12 years,especially for the shrub layer.But the biomass of litterfall collected in the plantation was greater than that of the rain forest for the reason that Betula alnoidis defoliated in dry seasons.9 Four years observation found that soil bulk density tended to increase first, then decrease after planting trees;total soil porosity and non-capillary porosity tended to decrease and after few years they recovered to different degrees;the soil cation exchange capacity for all forest types increased;in the soil of 0-30cm depth,soil salt saturation tended to decrease;nutrient content in the soil of 0-60cm depth in the young stand tended to decline;soil effective P,effective K and N contents all tended to decrease.

山地雨林的总生物量远远大于10年生的西南桦人工林，其中灌木层的相对差别尤其巨大。94次的观测发现，人工林栽植后，土壤容重一般呈现一个先上升后下降的特点；而土壤非毛管孔隙度、土壤总孔隙度大多呈下降趋势，几年后有不同程度的恢复。

The plantation defoliated in dry seasons while the mountain rain forest was tall and dense evergreen broadleaved forest and kept green in dry season.The mountain rain forest\'s arbor layer contained 3 layers.Relatively open space under the canopy,rare shrub,sparse grasses,very tall wood vines and rich epiphytes were found in it.4 Afforestation did not change the life form spectrum significantly.

西南桦人工林的乔木层在旱季落叶，而山地雨林外貌为高大、常绿、茂密的阔叶林，即使旱季也仍保持林冠葱绿的外貌，乔木层可明显的分为3层，林下比较空旷，灌木植被少见，草本植物分散，另外具有高大的木质藤本植物和附生植物。4人工造林对群落的物种生活型谱影响不大。

In 1998,Malamud et al compared actual forest fire data with simulation results of forest-fire model proposed by Drossel et al.and found that actual forest-fire system has self-organized criticality characteristics.

研究主要基于火灾发生原理法，分析各种气象因素、人口因素等对森林火灾发生概率的影响，对其进行定量化，特别是对人口密度对森林火灾的影响进行了定量化。

3Using long-term measurement of forest ecosystems, together with r elative data provided by forest resource inventory, hydraulic and meterorologica l departments, we estimate the various forest benefit values of Heilongjiang Pro vince, including those for visible and invisible products. Transferring the "pr oducts" to currency value using equivalent replacement of beneficial products f or currency and standard dimension, the total value is 498.687×108 yuan which takes up 32.7%of the total annual average provincial production (1522×108 yuan).

3引用多年森林生态系统定位研究结果，并参照森林资源调查、水利、气象等部门提供的有关数据，计算出黑龙江省森林各类效益值(有形产品和无形产品的产量)，通过等效益物替换和货币置换法进行&产品&的转换和量纲统一，最终得出黑龙江森林总效益值为498.687×108元，占全省(1990-1992)年平均总产值1522×108元的32.7%。

To the saying of wasting ,in my opinion,when the pets are buried in some little forest and the forest can't be an area of living,why not let the the pets exuberate the little forest?

关于浪费土地这一说法，既然是安葬在小树林里的，本来因为环保这小树林就不可能变成住宅区的，何不让宠物的尸体来旺盛这一片树林呢？

The fruiting bodies of ectomycorrhizal fungi were abundant and diverse in intact forest dominated by Fagaceae. Only a few species of macrofungal bodies were found in the pine dominated forest and secondary broad-leaved forest and none were seen in grassland during the study.

外生菌根菌子实体在以壳斗科植物为优势种的原生性次生林中较多且种类丰富，在松林和次生阔叶林有少数种类，但次生草坡群落未见有外生菌根菌子实体。

We may see from next: the subject of forest resources ownership is absent, rights of different subject are not clear; rights of contractor and management for forest resources haven't got effective guarantee; government regulation's actions are too much, and hamper the development of foresty; right to use forest land hasn't got sufficient elaboration, etc.

集中表现在：森林资源所有权主体缺位，权属不清；森林资源的承包经营权没有得到有效保障；政府干预过渡，阻碍了林业的发展；林地使用权的作用没有得到充分发挥等。

From intergrating model the general forest ecological economic structure classified by equal interval analysis spatial heterogenicity of the forest ecological benefit economic structure to create money gross of GIS spatial graphic distribution and statistics histogram, described the ecological benefit, and dynamics analyse the forest ecological benefits in last ninty years.

从广义森林生态效益经济结构汇总模型出发、按等间隔的分类标准作出森林生态效益货币总量的GIS空间分布图及其统计直方图，进行森林生态效益经济结构的空间异质性分析，划分黑龙江省森林生态效益的主产区，进行了森林生态效益的跨度近90年的动态分析。

Behaviour ecology, physio-ecology and community ecology of vines in the evergreen broad-leaved forest of Tiantong National Forest Park, Zhejiang Province, China, were studied and rich first-hand data were collected in this project.Some vines with different climbing motheds were much different in leaf anatomy, ecophysiology, growth rhythm and behavior, and another vines with same climbing methods showed similar adaptation to habitat, on which their distribution in a forest depended. The concept of climbing unit consisted of internode, leaves and tendrils or other climbing organs on it was put forth, and the method to calculate and value the climbing capaity of a vine was set up. In the meantime,experimental ecology of a twining vine Humulus scandens was carried out.

本项目以浙江天童常绿阔叶林为基地，从行为生态、生理生态和群落生态学等角度较系统深入地研究了常绿阔叶林藤本植物的生态适应特征，取得了丰富的第一手资料，结果表明不同攀援类型的藤本在形态结构、生理生态、生长和攀援行为上表现出明显的差异，而同一攀援类型的藤本表现出较大的趋同适应的特征，但也存在着差异，这些特征或差异决定了它们在群落中分布的层次和与支持木之间的作用方式；提出了攀援单位的概念，初步建立了攀援能力的测定和评估方法。

If you were not , and OS X just booted normally, have no fear.

如果你没有，和OS X刚刚启动通常，没有恐惧。

I only want to preserve our all .

我只想保存好我们的一切