According to regulations of the government, in addition to afforested land, the area of bush forest, the area of forest land inside farm land and the area of trees planted by the side of farm houses and along the roads, rivers and fields should also be included in the area of afforested land in the calculation of the forest coverage-rate.

在計(jì)算森林覆蓋率時人妻少妇精品视频一区二区，森林面積包括郁閉度0.2以上的喬木林地面積和竹林地面積久操视频是精品，國家特別規(guī)定的灌木林地面積、農(nóng)田林網(wǎng)以及四旁（村旁、路旁永久自慰网站喷水、水旁色五月综合在线、宅旁）林木的覆蓋面積。

In this treatise, the Huangfengqiao forest farm in Youxian county is taken as the research object. The applications of artificial neural network in forest management decision-making are discussed, including forest resources prediction and site quality evaluation.

本論文以攸縣黃豐橋林場作為研究對象国产专区精品调教捆绑在线播放，初步探討了人工神經(jīng)網(wǎng)絡(luò)方法在森林經(jīng)營決策中的應(yīng)用在线观看视频网站黄色，包括在森林資源預(yù)測以及立地質(zhì)量評價中的應(yīng)用。

The soil and water losses are very light and its difference is not notable in woodland of different tillage mode of economic forest, relatively the soil and water losses is lighter hi protecting slope model than in clearing model in low crown density benching economic forest such as Chinese chestnut, but the soil and water losses is lighter in clearing model than in protecting slope in high crown density benching economic forest such as bayberry.

不同耕作模式成年經(jīng)濟(jì)林地水土流失情況都較輕微肏屄毛片，差異性不顯著毛片网在线播放。相對而言郁閉度小的經(jīng)濟(jì)林如板栗林地臺地護(hù)梯方式要比臺地清耕方式好，郁閉度大的經(jīng)濟(jì)林如楊梅林地臺地清耕方式要比臺地護(hù)梯方式好自拍偷在线精品自拍偷99。

Annual supply, demand, profit and loss of EF (1995-2005) for Tianjin were calculated based on MEFM. Per capita Ecological Footprint of arable land, pastureland, forest land, water area and fossil-energy land were 0.0009,-0.3224,-0.1991, 0.0255,-1.9600 hm^2cap^(-1) respectively. The deficit of PEF for pastureland, forest land and fossil-energy land increased annually except that the PEF for forest land and water area increased a little. During the period of 1995-2005, higher energy consumption of per unit production, accretions of population and built-up area were the main factors to the increasing of PEF deficit for Tianjin.

利用改進(jìn)后的生態(tài)足跡模型計(jì)算天津市1995-2005年的生態(tài)足跡及其動態(tài)變化值日本黄色免费网址，天津市耕地、牧草地免费黄片一级、林地日韩国产综合在线、水域和化石能源用地人均生態(tài)足跡盈虧分別為0.0009，-0.3224黄色国产精品自拍视频网站，-0.1991色呦呦亚洲色图，0.0255，-1.9600hm^2人^(-1)日日夜,人人操，除耕地和水域略有盈余外在线懂的，牧草地、林地和化石能源用地人均生態(tài)赤字均呈遞增趨勢99ryav1。1995-2005年間天津市單位產(chǎn)值能耗居高不下黄片视频在想观看、人口規(guī)模增長與建筑用地?cái)U(kuò)張是導(dǎo)致人均生態(tài)赤字?jǐn)U大的根本原因。

In this study, we take severely soil eroded land, ban forest (as the control I ecosystem after planting Pinus massoniana and baned) and a mixed forest of Cunninghamia Lanceolata plantation and Pinus massoniana (as the control II ecosystem after planting a mixed forest of Cunninghamia Lanceolata plantation and Pinus massoniana and taking engineering restoration measurement)for study.

本文以未治理的侵蝕地作為對照欧美一级日韩片，以在侵蝕地上營造馬尾松并封禁管理以及通過工程措施后種植杉木—馬尾松混交林為研究對象人人干人人看另，通過野外觀測和實(shí)驗(yàn)室分析，研究了不同恢復(fù)措施對土壤結(jié)構(gòu)五月天色欲综合网、土壤化學(xué)性質(zhì)久久偷窥视频、群落生物量、植物養(yǎng)分曰本性l交片视频视频、生物多樣性的影響禁止看黄片。

The forest parks on the Qinling Mountain′s north slope are the mainly area for forest recreation industry in Shaanxi province. Forest recreation value is one of non-market products, a new method for value estating need to be exploied.

根據(jù)秦嶺北坡森林公園為陜西省森林生態(tài)旅游活動的主體，而森林公園游憩價值又是非市場性的a片av在线播放，這就需要探索新的方法來進(jìn)行計(jì)量測評一级艳片真人视频观看。

The results indicate that:(1)Compare with the comparion, the soil physics character are improved after vegetation restortion , the soil unit weight in cyclobalanopsis glauca, Pinus elliottii, Robinia pseudoacacia , mixed forest and fire slash shrub separatly are 1.525g/cm~3, 1.426 g/cm~3, 1.625 g/cm~3, 1.482 g/cm~3, 1.423 g/cm~3. We can find the soil unit weight in other forest all bigger than the comparion (1.580 g/cm~3) except Robinia pseudoacacia .All these mean forest soil is looser and better capacity for aerated and dank.

結(jié)果表明：(1)植被恢復(fù)后林地土壤物理性質(zhì)有良好的改進(jìn)，青岡在线欧美片、濕地松国产精品久久综合紧、刺槐、混交林、火燒跡地灌叢容重分別為：1.525g/cm~3免费A级毛片无码AⅤ中文字幕、1.426g/cm~3yp污网站在线观看、1.625g/cm~3、1.482g/cm~3日批批、1.423g/cm~3久久国产精品国产精欧洲欧洲黄页，除刺槐外其他林地均低于對照(1.580g/cm~3)，上述幾種林分的孔隙度分別為：45.872%无码免费精品、51.956%欧美uuuu666、44.093%、50.485%精品福利片A片在线、55.648%国产真人又黄又大一级、47.228%，說明林地內(nèi)土壤較對照更為疏松亚洲综合久久小说专区图片、通氣透水能力更強(qiáng)欧美性爱一级片免费看，更有利于土壤微生物的活動，為研究區(qū)土壤肥力的提高奠定了基礎(chǔ)国产视频91。

The quality and composition of the pine forest and oak forest were highly similar while the relationship between the composition of light and the canopy characters varied with forest types.

3光資源的數(shù)量及其組成在油松林和遼東櫟林下的變化非常相似性爱网址大全，但光資源的組成與林冠特徵的關(guān)系在兩種森林間存在差異欧美亚洲黄色网络。

And there are bigger distinctions on the definition of forest resource , the right of ascertaining forest type , the rule of legal responsibility and other about the basic forest protection law of two country .

而且好深好爽一区二区，兩國的森林保護(hù)&基本法&在森林資源的定義一区二区亚洲、森林種類的確定權(quán)限、在法律責(zé)任的規(guī)定等方面也有較大的差異国产在线A级在线视频。

Originally a forest-dwelling animals, due to changes in the environment to survive were forced to Shimoji food, living in the forest, open space or forest grassland transition zone.

原為林棲動物jiZZjiZZjiZZjiZZ免费看，因生存環(huán)境的變化被迫下地覓食，生活于林間空地或森林草原交接地帶老色鬼超碰人人操。