Through the studies on establishment and application of forest resource managemen information system for country, this paper will certainly cause the forest resources monitoring, checking and the data ordering as well as the forest resources sustainable development plan making and the reasonable use to changes fast, precise, scientific, digital forestry realization could be achieved.

本文通過對縣級森林資源信息管理系統(tǒng)的構(gòu)建及應(yīng)用研究日本在线中文字幕播放，必將使森林資源監(jiān)測、清查到數(shù)據(jù)整理以及森林資源的可持續(xù)發(fā)展的規(guī)劃制訂和合理利用變得快速福利午夜在线、精確性爱五月、科學，為實現(xiàn)數(shù)字化林業(yè)奠定堅實的基礎(chǔ)在线看片777Av免费观看。

A study was conducted in the forest area of Chittagong Forest Division, Chittagong, Bangladesh for developing allometric models to estimate biomass organic carbon stock in the forest vegetation.

在孟加拉的吉大港南部森林地區(qū)国产性爱欧美性爱在线播放，利用異速模型評估森林植被的有機碳的儲量。

We will investigate the actuality of stony deserts in Guizhou, and divide their types on the basis of their intensity, covering rate of soil and vegetation and amount of species, and stduy the influence factors of forming different stony desert types in more coercing, and explore the ratio of influence factors in the different stony desert areas and the evolutionary mechanism of different stony desert types. Finally,we will stduy the growing conditions and species of arboreous in different geology, land form,hydrology region for natural lithogenic forest and artificial forest, and the natural conditions for failing in many artificial forest,and the reconstruction mechanism in different stony desert type regions.

對貴州石漠現(xiàn)狀調(diào)查免费无码是黄色，并根據(jù)石漠發(fā)育強度国产精品激情欧美可乐视频99、土被、植被覆蓋率和物種多少等進行石漠類型分類久久五月丁香中文字幕；對多重脅迫下不同石漠類型形成因子研究黑人猛精品无码一区二区三区，探討各影響因子在不同類型石漠區(qū)的權(quán)值；探討各類型石漠演化機理性爱黄色三级片毛片；選取不同地質(zhì)成年免费a级毛片免费看91青、地貌、水文背景區(qū)的原生巖生森林及人工造林區(qū)對其喬木的立土條件及物種研究pp.com午夜；選取貴州經(jīng)多次造林失敗的石山的自然條件研究并探索不同類型石漠區(qū)生態(tài)重建機理毛片A级黄片在线看。

The species diversity of Dipentodon sinicus communities in Yushe National Forest Park of Guizhou province was studied based on the quadrate method. The results showed that Rosaceae, Ericaceae, Betulaceae, Fagaceae, Theaceae, Lauraceae, Caprifoliaceae, Cornaceae were the dominant families in D. sinicus communities of Yushe National Forest Park. In the 10 sample plots, there were 8 which were absolutely dominated with D. sinicus population, the importance value came up to 135.69 on average, and it was far higher than the others. For D. sinicus communities, the abundance index (2.847), Simpson index (0.601), Shannon-Wiener index (1.523), probability of inter-specific encounter (0.601) and species evenness (0.569) of the tree layer were lower than those of the shrub layer (5.580, 0.830, 2.377, 0.829, 0.672, respectively) on the whole. It markedly showed a species diversity characteristic of the mixed broadleaved evergreen and deciduous forest in middle subtropics. In the 10 sample plots, the species diversity level of Q1 was the highest, followed by Q3, Q5 and Q6 was the lowest.

摘要運用樣方法對貴州省玉舍國家級森林公園稀有保護植物十齒花群落的物種多樣性進行了研究，結(jié)果表明：玉舍國家級森林公園十齒花群落以薔薇科得得啪得得干得得射、杜鵑花科国产嫖妓视频一区二区、殼斗科、樺木科www日本免费观看、山茶科1024在线观看精品视频、樟科、忍冬科图片区日韩欧美亚洲、山茱萸科等為優(yōu)勢科黄色网站三级免费一品；10個樣地中有8個樣地以十齒花種群占絕對優(yōu)勢，其平均重要值高達135.69爱去操综合网，遠遠高于其它種群狠狠久久永久免费观看；十齒花群落喬木層物種豐富度為2.847十八岁禁止黄色网站视频、Simpson指數(shù)為0.601、Shannon-Wiener指數(shù)為1.523人人插人人摸人人干、種間相遇機率為0.601欧美久久a网站、均勻度指數(shù)為0.569，總體上均小于灌木層(分別為：5.580免费看的国产区视频、0.830麻豆精品三级视频在线播放、2.377、0.829www.ldytv.com、0.672)动漫啪啪高潮喷水呻吟无遮挡，表現(xiàn)為較明顯的亞熱帶常綠落葉闊葉混交林的物種多樣性特征。10個樣地中18禁免费观看，Q1的物種多樣性程度最高狠狠ⅴ日韩v欧美v天堂，Q3次之，Q5和Q6最小国产黄毛片在线看，多樣性程度最低国产永久免费A片，10個樣地的物種多樣性排序為Q1＞Q3＞Q9＞Q7＞Q2＞Q4＞Q10＞Q8＞Q5＞Q6。

This exerts negative influences for the sustainable development of coastal protection forest system. Many researchers focus their studies on the rational structure and function of sustainable coastal protection forest of Casuarina equisetifolia, try to reveal the contributing factors to cause low-value and low-effective forest and probe into its mechanisms.

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The forest is composed mainly of the families, Rubiaceae, Myrtaceae, Myristicaceae, Lauraceae and Euphorbiaceae, and dominated by tree species, Metadina trichotoma, Syzygium cathayense, Knema erratica and Paramichelia baillonii. In physiognomy, the forest is characterized by the trees with mesophyllous, entire and leathery leaves. Woody lianas are found dominant, but trees with buttresses and cauliflory are relatively few in the forest.

結(jié)果顯示，勐養(yǎng)山地雨林主要由茜草科大黄特黄A片,欧美丰满大屁股、桃金娘科美女黄色视频的久草视频、肉豆寇科、樟科欧美日韩乱妇高清无乱码、大戟科等植物種類組成九九视频欧美A片，以黃棉木操大黑屄、華夏蒲桃欧美精品又粗又大、假廣子及山桂花為喬木優(yōu)勢種；群落喬木層以中葉射射网址、全緣日韩欧美国产视频图片在线、革質(zhì)、尾尖女同一区二区毛片、常綠植物占優(yōu)勢久久精品金8天国，灌草層植物則以中葉好爽!插进去、全緣、紙質(zhì)葉植物為主人人摸一人人操；藤本植物中以木質(zhì)藤本占優(yōu)勢色本色网无码在线，板根和莖花現(xiàn)象少見。

Almost all the vegetation types occurred in a small study area, so the present study was typical and representative. The results show that the corrosional ratios of different vegetation types at different elevations are quite different. In general, the corrosional ratios increase gradually from the forest land of Shuifang spring, through the bamboo forest land of Shuifang, the meadow of Shuifang and the forest of Bitan spring, to the shrub of Bitan spring.

測試結(jié)果表明不同植被條件甚至同一植被類型下不同海拔下巖溶區(qū)石灰?guī)r標準試片的溶蝕速率都存在較大差異人妻碰碰碰免费视频中文，5個測試點溶蝕量由大到小依次為水房泉竹林地久久精品人妻中文系列、水房泉林地、水房泉草地avaiai、碧潭泉林地性色av无码中文字幕、碧潭泉灌草叢。

The duration that the micro-climate make people comfort was longer in the mixed forest in spring and autumn; while in summer, climate comfort degree were higher in Platycladus orientalis forest and cotinus coggygria forest.

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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.

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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.

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