The results showed that: with the regression analysis of Betula platyphylla, Pinus koraiensis, Abies nephrolepis, Picea koyamai var koraiensis, and Betula costata, there was a significant negative correlation between neighborhood interference index and the growth (0.40~0.89) and the correlation extent depended on the neighborhood influence zone and slope. The neighborhood influence zone corresponding to maximal regression coefficient R~2 was the neighborhood influence radius. Based on the linear subsection regression between neighborhood interference index and influence zone of five species, the neighborhood interference index increased with the increasing zone and there was a previous increasing trend in a certain scope, while the increasing trend slackened beyond the zone. The neighborhood influence zone corresponding to transition point was the neighborhood influence radius. The neighborhood interference index positively correlated with the neighborhood influence zone and the range of R~2 was 0.40-0.64. With the analysis of tree cores of Juglans mandshurica, Fraxinus mandshurica at middle and lower slope in a plot which was fostered in 1995, the distance which the growth release farthest neighborhood and object stub was judged, thus the neighborhood interference radius was inferred. According to the studies, we found that the neighborhood interference radius was different among different trees, even if the neighborhood interference radius of the identical tree species also had the difference at different slopes.

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Spruce Knob lies within the Monongahela National Forest and is a part of the Spruce Knob-Seneca Rocks National Recreation Area.

云杉旋鈕在于莫農(nóng)加希拉國(guó)家森林和是部分云杉旋鈕黄色视频一、二、三区，塞涅卡巖國(guó)家休閑區(qū)。

Correlation analysis showed that the growth of Picea schrenkiana was significantly sensitive to climate variations.

利用新疆伊犁地區(qū)雪嶺云杉的6個(gè)樹輪寬度年表欧美一级操，通過(guò)相關(guān)分析的方法午夜福利120，分析不同地形條件下雪嶺云杉樹輪寬度對(duì)于氣候要素的響應(yīng)操东北妇女视频。

After analysing the influence on the growth of root and stem of three different nitrogen concentration and PH matrixes,we concluded that the notrogen concentration and pH value and their interaction have influences on the germination of seeds and the growth of Picea aspoerata seedling.

通過(guò)分析3種氮濃度及3個(gè)不同pH值基質(zhì)下云杉幼苗根莖生長(zhǎng)量的差異，通過(guò)實(shí)驗(yàn)表明：不同的氮濃度及不同的pH值及二者間的交互作用對(duì)云杉幼苗的萌發(fā)和幼苗的生長(zhǎng)存在一定的影響色屁屁影院www免费看国产馆。

This dissertation focuses on the ecological characteristics, breeding techniques and introduction research on Picea mongolica. The results are as follows:(1) The seedlings and young trees take on a cluster distribution with a high, mortality.

因此亚洲色图精品录音，通過(guò)對(duì)沙地云杉的生態(tài)學(xué)特性及引種進(jìn)行研究，找出沙地云杉育苗和引種造林方面的限制因子97色在线视频观看香蕉，為科學(xué)育苗和引種推廣提供科學(xué)的方法和依據(jù)激情无码色欲毛片，為我國(guó)沙化地區(qū)的生態(tài)恢復(fù)起到指導(dǎo)作用全免费A级毛片毛片。

The distribution pattern of Picea schrenkiana poulation was related to its biological characteristics's age structure and regeneration and regeneration mode and the microenvironments.

天山云杉成熟林種群的空間分布格局受天山云杉種群本身的生物學(xué)特性一级片黄片视频、種群的年齡和更新方式等群落內(nèi)小環(huán)境的共同影響。

At Young Chang, we craft our soundboards from Solid Sitka Spruce found only in the coastal forests from Northern California to Alaska.

在英昌91嫩草国产线永久免费，我們用美國(guó)西加云杉來(lái)制造共鳴板日韩黄色网站AV。西加云杉僅生長(zhǎng)在北加利福尼亞州到阿拉斯加海岸的森林中。

Sitka is a bit stronger and stiffer than other spruces.

西加Sitka云杉比其他云杉堅(jiān)硬1024视频在线观看精品。

Through this study, the sustainable management hierarchical system of forest ecosystem was established, providing the frame of forest sustainable management which given dominance to the basic hydrology ecosystem processing of mountain forest. At the same time, this research brought forward the "double-cycle" mode maintaining the integrality of Tianshan Mountain forest ecosystem. Within all these studies, on one hand, through the research about the regeneration response to different disturbance types, the scientific measures concerning restoration and rebuilding of fragmentized landscape were supplied. On the other hand, t

建立了森林生態(tài)系統(tǒng)可持續(xù)經(jīng)營(yíng)等級(jí)系統(tǒng)真人交，為天山以森林生態(tài)系統(tǒng)基本水文生態(tài)過(guò)程為主導(dǎo)的森林可持續(xù)經(jīng)營(yíng)提供了框架；提出的天山森林生態(tài)系統(tǒng)生態(tài)完整性自維持的&雙循環(huán)&模式為天山森林生態(tài)系統(tǒng)的可持續(xù)經(jīng)營(yíng)奠定理論基礎(chǔ)久久久久精品日韩久久久，通過(guò)不同干擾方式下天山云杉的更新反應(yīng)研究2022韩国限制级电影在线观看，為破碎化森林景觀的恢復(fù)與重建提供了科學(xué)途徑，通過(guò)對(duì)天山云杉分布格局及動(dòng)態(tài)欧美色中色、更新格局www.rct999.com、林冠干擾后的系列特征及相應(yīng)的參數(shù)和反映種群生活史的生命表研究，為天山森林生態(tài)系統(tǒng)可持續(xù)經(jīng)營(yíng)景觀水平的評(píng)價(jià)提供了基本參數(shù)欧美A色黄毛一片。

The results are as follows:① The population structure of Picea schrenkiana-Dryopteris filix-mas pure stands is stable, the patterns of age, diameter and the height of Picea schrenkiana-Dryopteris filix-mas pure stands are all in inverse J-shaped curves, indicating a typical uneven-aged stand structure.

以西天山國(guó)家自然保護(hù)區(qū)內(nèi)1 hm^2原始鱗毛蕨(Dryopteris filix-mas)天山云杉純林臨時(shí)標(biāo)準(zhǔn)地調(diào)查材料為基礎(chǔ)黑人粗大猛烈进出高潮视频，分析鱗毛蕨天山云杉林胸徑、樹高和年齡結(jié)構(gòu)日韩高清不卡福利片视频、種群存活曲線以及基本測(cè)樹因子之間的相互關(guān)系黄片免费有限。