【正文】 源地之一。落葉松土壤適應能力強，有耐水濕的能力。人工林目前占世界森林總面積的7%。林業(yè)發(fā)展趨向于多功能化、多效益化，現(xiàn)代林業(yè)的發(fā)展以及成為帶來經(jīng)濟效益的一個重要支柱，改善了人民的生存空間的同時更改變了人民的生活質(zhì)量。（保密的學位論文在解密后應遵守此協(xié)議）研究生簽名： 時間： 年 月 日導師簽名： 時間： 年 月 日65 / 65目 錄摘 要 1英文摘要 3第一章 緒論 5 5 5 6 8 10 14 14 15 16第二章 撫育間伐效果研究內(nèi)容和方法 16 16 17 17 18 18 19 19 19 20 21 22 23 24 25第三章 撫育間伐對人工林土壤的影響 26 27 27 28第四章 研究結果與分析 29 30 31 32 33第五章 遼寧省清原縣撫育間伐工作存在的問題和對策 34 34 35第六章 結論與建議 40 42 45參考文獻 46致 謝 47CatalogAbstract 1English abstract 3Chapter 1 introduction 5 research background 5 research purpose and significance 5 domestic and international research review 6 Foreign Studies on thinning 8 domestic research on thinning 10 the role of thinning 14 effects of thinning on soil carbon in plantations 14 effects of site conditions on stand growth and tending management 15 effects of stand density on stand growth and tending management 16The second chapter: research content and method of thinning effect 16 Qingyuan County of Liaoning Province, geographical location and related overview 16 climate 17 topography and geomorphology 17 water resources 18 soil 18 the main content of the research 19 the main method of study 19 standard setting 19 setting of standard land under different site conditions 20 setting of standard land under different stand density 21Investigation and treatment of standards 22Contents and methods of determination of main indexes of 23 data processing 24 technical route 25The third chapter: influence of thinning on the soil of artificial forest 26 influence of tending on physical properties of plantation soil 27 effects of tending on the chemical properties of plantations soil 27 the influence of tending on soil enzyme activity was 28The fourth chapter is the result and analysis 29 effects of different stand density on stand growth 30 effects of different stand density on tending management 31 effects of different site conditions on stand growth 32 the influence of different site conditions on tending management 33The problems and Countermeasures of Qingyuan County of Liaoning Province, the fifth chapter tending thinning work 34 the problems existing in thinning 34, thinning, perfect relevant countermeasures 35The sixth chapter is conclusion and suggestion 40 conclusion 42 remendation 45References 46Thanks 47第1章 緒論森林，是陸地生態(tài)系統(tǒng)的主體部分，是維持生命體生存的最不可或缺的生態(tài)資源。研究生簽名： 時間： 年 月 日導師簽名： 時間： 年 月 日關于論文知識產(chǎn)權和使用授權的說明本論文的知識產(chǎn)權為沈陽農(nóng)業(yè)大學所有。 tending of plantation。, 500 strains of/hm 178。關鍵詞：撫育經(jīng)營；林分密度；立地條件；人工林撫育；土壤酶活性；Abstract: in the process of forest growth, will be affected by various factors, and natural forest because of various effects led to tree density, so through the thinning of science, will growth advantage to eliminate the unqualified inferior forest in natural forest. Then, according to different stand density and different site conditions, how to select reasonable thinning of different intensity to provide advantages for tending management. This paper takes the suburb in Qingyuan County of Liaoning province forest farm as research sites, by setting the standard of different investigation, parative analysis, trying to find the most reasonable way of tending operations. In view of the specific conditions of suburban forest farms, different tending and management methods were adopted under different stand density and different site conditions. And specific analysis of the suburban forest currently existing in the management of the problem, put forward related suggestions to improve and provide the reference value for the local forestry workers take proper measures of tending operations. The main results are as follows:(1) different stand density is set up, and the stand factor of tree growth is different. 100 strains of hm 178。撫育經(jīng)營不同的間伐強度，土壤的溫度，濕度不同。樹冠結構上升，具有正相關性質(zhì)。(2) 坡度、坡位、坡向等地形因子和土層厚度、土地類型等土壤因子是影響城郊林場人工林林木生長的主要立地條件。五個不同林分密度中，100株/hm178。200株/hm178。針對林場的具體情況，在不同的林分密度下，不同的立地條件下，采用不同的撫育經(jīng)營方式。淺談遼寧省清原縣撫育間伐經(jīng)營方式與林分密度、立地條件的關系摘要森林在生長的過程中，會受到各種因素的影響，而天然林則因為各種影響導致林木密度不均勻，因此需要通過科學的撫育間伐，將天然林中不具備生長優(yōu)勢的劣質(zhì)林木剔除。并對林場目前在經(jīng)營過程中存在的問題進行具體的分析，提出了改善的相關建議，為今后當?shù)亓謽I(yè)工作者采取適當合理的撫育經(jīng)營措施提供了參考價值。300株/hm178。的林分密度下林木生長的最好。林地坡度變化不大，林地坡位導致土壤肥力不同，林地坡向使日照時間長短和強度有差異。林地坡向?qū)α址稚L的平均胸徑、樹高有較大影響，對樹冠結構沒有影響。撫育經(jīng)營不同的間伐強度，Ph值、有機質(zhì)。set in the standard, 200 strains of /hm 178。 different stand densities. According to the data analysis, the stand density has different effects on the average DBH, crown structure, tree height and so on. When the stand density increased continuously, the average DBH and crown structure of trees decreased, but the tree height increased.(2) the soil factors such as slope, slope, slope and other soil factors, such as soil thickness and land type, are the main site conditions affecting the growth of plantation forest in suburban forest farm. The slope of woodland forest slope caused little change, soil fertility, woodland slope towards the sunshine time and strength are different. The forest slope had no influence on the average DBH, crown structure and tree height of the growth of the stand, and the two had little relationship. The