马尾松次生林,secondary Masson pine forest
1)secondary Masson pine forest马尾松次生林
1.A study on structure and growth of young population ofsecondary Masson pine forest;马尾松次生林幼龄种群结构和生长状况研究
英文短句/例句
1.Influences of Fire Disturbance on the Water Repellency of Pinus massoniana Soil森林火灾对马尾松次生林土壤斥水性的影响
2.Studies on the Ecological Characteristics of the Communities of Secondary Forests of Pinus Massoniana, Acacia Confusa Along the Coast;沿海马尾松、相思次生林群落生态学特征研究
3.Studies on the Population Ecology of Dominant Population in Secondary Pinus Massoniana and Acacia Confusa Forests in Coastal Area;沿海马尾松相思次生林优势种群生态学研究
4.The Study of Biomass and Carbon Storage in the Ecosystem of Secondary Forests of Pinus Massoniana, Acacia Confusa Along the Coast;沿海马尾松台湾相思次生林生态系统生物量及碳贮量的研究
5.Litter Decomposition and Influence on Carbon Flux in Secondary Forest of Pinus Massoniana, Acacia Confusa Along the Coast沿海马尾松相思次生林凋落物分解及其对碳通量的影响
6.Study on species niche of Schima superba and Pinus massoniana artificial forest shrub layer木荷马尾松林更新层种群生态位分析
7.A Preliminary Study of Germination Characters of Masson Pine pollens and Pollens Vitality of Masson Pine with Different Stands马尾松花粉萌发性状和不同林分马尾松花粉生活力的初步研究
8.Study on Growth Modeling with Artificial Neural Network for Masson Pine Plantation;马尾松人工林生长的人工神经网络模型研究
9.Main Risky Pest Monitoring of Pinus Massoniana Forests in Wuyi Scenery Spot;武夷山风景区马尾松林主要有害生物的监测
10.Study on Biomass and Nutrient in Pinus Massoniana-Hardwood Mixed Forests;马尾松-阔叶树混交林生物量及矿质养分的研究
11.Analysis on Economic Benefits of Forty-40-year-old Masson Pine Plantation;40年生马尾松人工林经济效益分析研究
12.Study on Growth of Pinus Massoniana and Cupressus Funebris and Its Health Management in Three Gorges Reservoir Area三峡库区马尾松、柏木林木生长及健康经营研究
13.Biodiversity of the low hilly Pinus massdoniana of Dahuang in Wannian Country江西万年大黄低丘马尾松林的生物多样性
14.Synthetic Estimation of Surface Strengthening Technique For Fast-growing Lumber from Pinus massoniana Plantation马尾松人工林速生材表面强化工艺综合评价
15.Research on Genetic Variations and Selection of 28-Year-Old of Pinus massoniana Provenances Plantation28年生马尾松种源试验林遗传变异及选择
16.Effects of fertilization on the growth and resin yield of middle-aged forest of Pinus massoniana施肥对马尾松中龄林生长量和产脂的影响
17.Impact of invasion of pine wood nematode on the niche of main populations in Masson pine community松材线虫入侵对马尾松林主要种群生态位的影响
18.Diffusion effect of Hemiberlesia pitysophila biocontrol fungi in different types of Pinus massoniana forests松突圆蚧生防菌在马尾松不同林型中的扩散效果
相关短句/例句
secondary Pinus massoniana forest马尾松天然次生林
1.Secondary Pinus massoniana forest is the main forest type of Qiandao Lake.马尾松天然次生林是千岛湖的主要森林植被类型 ,虽具独特风韵 ,但生物多样性低、稳定性差、生态功能脆弱 ,面临松毛虫和松材线虫的致命威胁。
3)Pinus massoniana forest马尾松林
1.Successional dynamics ofPinus massoniana forest in Lijiang River watershed,Guilin;桂林漓江流域马尾松林演替动态
2.Based on a field investigation, the early recovery vegetation characteristics ofPinus massoniana forest, Cunninghamia lanceolata forest and evergreen broad-leaved forest, which had been burned severely one year before, in Maoan Forestry Centre of Chongqing were analyzed.通过对重庆市北碚区茅庵林场马尾松林,杉木林和常绿阔叶林3种群落火烧1年后的迹地以及未火烧林地的群落学调查,研究了高强度火干扰后不同群落早期恢复植被特征。
3.Height, diameter at breast height(DBH) and canopy width(CW) of 17 broadleaved tree species in degradedPinus massoniana forest from lianhua mountain Nature Reserve of Dongguan city, were measured and analyzed.对东莞莲花山自然保护区退化马尾松林林分2002年种植的17个3年生阔叶树种的树高、胸径以及冠幅进行测量和分析。
4)masson pine forest马尾松林
1.The distribution of Masson Pine forest is very wide in the upper ana middle reaches of Yangtse River.长江中上游地区马尾松林的分布非常广泛。
5)Pinus massoniana马尾松林
1.Eco-hydrological Effect ofPinus massoniana Canopy and Its Influence Factors in Zhangjiajie of Hunan Province;湖南省张家界马尾松林冠生态水文效应及其影响因素分析
2.Study of Hydfological Characters and Movement of Mineral Elements ofPinus massoniana Forest Watershed;马尾松林水文特征及其矿质元素迁移研究
3.pubescens,Pinus massoniana stand and tea garden were analyzed.通过对马尾松林、茶园和毛竹林土壤酶活性的研究表明:3种群落间,毛竹林的过氧化氢酶活性大于马尾松林、茶园(P<0。
6)Pinus massonian woodland马尾松林地
1.In the red soil area of southern China,because of erosion and degeneration ofPinus massonian woodland,extremely leanness of soil and large degeneration area,it is difficult to recover ecology of degeneratedPinus massonian woodland.我国南方红壤区严重侵蚀退化马尾松林地土壤极度贫瘠,加之退化面积广等因素,导致其恢复的难度加大,如何恢复侵蚀退化马尾松林地成为当前面临的一个艰巨而又迫切的任务,因此加快相关方面的研究和治理,探讨其退化机理,解决生态恢复关键技术,对于推动红壤区的生态建设具有重要意义。
延伸阅读
次生林次生林secondaryforest原始森林经过多次不合理采伐和严重破坏后自然形成的森林。与原始林一起同属天然林，但其立地特点、树种组成、林分结构和起源与原始林、人工林不同。人工林采伐迹地上，栽培树种的萌生林与入侵树种形成的混交林，也属于次生林。次生林分布范围广，种类多，不仅可以生产木材、薪炭材和林副产品，而且在涵养水源、保持水土、调节气候和维持生态平衡等方面均起着重要的作用。中国次生林约占全国森林面积的46.2％。次生林可划分为多种类型。①按发生时间分成早期次生林、中期次生林和晚期次生林。一般用以区别大范围内次生林的性质及恢复速度，供经营规划时参考。②按发生地区分成远山次生林和近山次生林。一般反映人为活动的强弱及经营次生林与农业的关系。③按经营措施分成抚育型、改造型、利用型和封护型等。④还可按森林自然特征分类，方法较多，有按优势树种和树种组成划分的，有以生态因子划分的，有以地形作为主导因子进行划分的，还有以立地条件和优势树种划分的。次生林的经营措施应根据自然特征和经济条件（交通、劳力、产品销路等）选用：①抚育间伐。科学地确定采伐木和采伐强度，为目的树种生长创造有利的环境条件。②林分改造。是在密度小、经济价值低或病虫害严重的林分中全面或局部伐除原林分，再栽植珍贵树种，以调整林分组成，增加林分密度，提高林分生产力。③抚育改造。是抚育间伐与林分改造相结合的一种经营方式。④封山育林。利用树木自然繁殖能力恢复森林的措施。可分为全封、半封和轮封3种。封山期间禁止一切人为活动，开封片则允许在一定季节内进行林副业生产活动。主要用在交通不便和经营水平不高的地区。郁郁葱葱的次生林
