2) soil in tree root zone
林木根区土壤
1.
Heavy metal contents and enzymatic activities of soil in tree root zone at different air-polluted areas;
不同大气污染区林木根区土壤重金属和酶活性研究
4) Cunninghamia lanceolata forest
杉木林
1.
Based on a field investigation, the early recovery vegetation characteristics of Pinus 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。
2.
And all the 30 plots were divided into four types of landscape forests: broad-leaved forest,coniferous and broad-leaved forest,Pinus massoniana forest and Cunninghamia lanceolata forest.
杉木林物种数量明显偏少,林分密度大,达到3 967株。
3.
Based on the data of gaps in Cunninghamia lanceolata forest in Ancaoxia,China,the size and formation pattern of gaps as well as the quantitative characteristics of gap makers were studied.
根据安曹下杉木丰产林全林林窗样地调查资料,分析了杉木林林窗的大小结构、形成方式及林窗形成木的数量特征。
5) Chinese fir
杉木林
1.
Soil samples were collected in Nanping,Fujian Province(117°57′E,26°28′N)and characteristics of soil inorganic nitrogen were investigated for different Chinese fir plantations of 11-,21-,28-,40-,88-year-old,compared with a mixed broad-leaved forest and a 2-year-old cleared area from an 86-aged Chinese fir plantation,which were both adjacent to the 88-aged Chinese fir stand.
在福建南平杉木林中心产区,选取11、21、28、40、88年生杉木人工林以及采伐迹地、杂木林为研究对象,研究不同年龄杉木林土壤无机氮的差异。
2.
The carbon stock and carbon sequestration of Chinese fir in different generations were investigated in Ancaoxia and Denke of Xihou Village, Nanping City, Fujian Province.
对福建南平市王台镇溪后村安曹下及邓窠的不同代数杉木林C库和C吸存的研究结果表明,1代杉木林C库总量为251。
3.
<Abstrcat>Based on the observed date, the efficiency of temperature and humidity of Chinese fir plantation has been analyzed.
结果表明:由于杉木林冠层的作用,使杉木林内形成了温度变化平缓,林冠层对地表温和土温的调节作用远大于气温;由于冠层的阻滞作用,使林内风速很小,乱流交换较弱,林木蒸腾蒸发的水气不易散失,造就了林内水气充沛、空气湿润的特征;杉木林内显热能的日平均波动在2%,杉木林内环境的潜热能占总温湿能的8%左右;杉木林具有这样的温湿特征是杉木林的结构特征、杉木林生理功能与环境相互作用的结果。
6) Chinese fir forest
杉木林
1.
Forest resources inventories materials and data from China Forest Ecosystem Location Research Network(CFERN) were prepared for estimating 4 periods of carbon storage of Chinese fir forest ecosystem from 1977 to 2003.
利用中国4次森林资源清查资料以及中国森林生态系统定位观测研究站(CFERN)的实测数据,估算了中国1977-2003年4个时期杉木林生态系统的碳储量,分析了其年龄结构特征、垂直分配结构特征、时空动态格局和贮碳潜力。
2.
A comparative study was conducted for 2 a on soil biological activities of a 70-year-old fact-growingand high-yield Chinese fir forest (hillside), and a 32-year-old"young forest" of Chinese fir (hillside), whichwere originally occupied by broadleaved forests in Ancaoxia, Xihou, Nanping.
32a生杉木“青年林”土壤生物学活性下降则更为明显，说明从杉木取代阔叶林（头耕土）起，土壤生化活性及土壤肥力就存在明显下降现象，轮伐期缩短或林地连栽杉木代数增加，而不采取恢复地力措施，杉木林地地力衰退将更为明显。
补充资料：土壤水分运动基本方程(见土壤水运动)
土壤水分运动基本方程(见土壤水运动)
turang shuifen yundong iiben土壤水分运动基本方程fangeheng见土壤水运动。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条