1) Betula platyphylla community
白桦林群落
2) Betula platyphylla forest
白桦林
1.
Throughfall and stemflow in a Betula platyphylla forest at the subalpine of Western Sichuan;
川西亚高山白桦林穿透雨和茎流特征观测研究
2.
Soil physical properties and leaf photosynthetic characteristics in three stands,Betula platyphylla forest,Quercus liaotungensis forest,and Betula platyphylla-Quercus liaotungensis mixed forest,which were located in the secondary zone of Ziwuling Forest of the Loess Plateau,were studied.
对黄土高原子午岭次生林区白桦林、辽东栎林和白桦-辽东栎混交林3种林分的土壤物理特性和叶片光合特性进行了研究。
3.
The tree height, diameter at breast height and growing stock of Betula platyphylla forest stand are lower in the Bashang Plateau than those in the Baxia Mountain in northern Hebei Province and eastern Inner Mongolia.
河北北部坝上与坝下白桦林比较 ,无论是林分的树高、胸径、蓄积量 ,还是白桦的高生长、直径生长、材积生长 ,都是坝上小于坝下 。
3) birch forest
白桦林
1.
Dynamic characteristics of soil collembolans in the birch forest of Xiao xinganling;
小兴安岭白桦林土壤跳虫的动态特征
4) Betula luminifera community
亮叶桦群落
1.
Betula luminifera community characteristics of Bijie District in Guizhou of Southwest China;
毕节试验区亮叶桦群落特征研究
5) Betula platyphylla secondary forest
白桦次生林
1.
Based on the community structure analysis of the Larix principis-rupprechtii artificial forest and the Betula platyphylla secondary forest, this thesis evaluated the underway tending felling and improvement of second-growth-stand, then compared their productivity in mountain region and steppe region.
本文在分析内蒙古白音敖包草原区华北落叶松人工林和白桦次生林的群落结构的基础上,对己采取的经营措施进行效果评价,并在此基础上对森林区和草原区的两种林分的生产力进行了分析比较。
2.
This paper sdudied soil properties,water holding capacity of litter and water storage performance of different stages of betula platyphylla secondary forest, the study revealed the functional differences of water conservation.
研究地设在东北林业大学凉水国家级自然保护区内,通过对不同林龄白桦次生林的土壤特性、凋落物持水量、林地土壤贮水性能进行研究,以揭示不同林岭白桦林水源涵养能力差异,同时也对其林外降雨、穿透雨、树干茎流和枯透水中的Cl~-、NH_4~+-N、NO_3~--N、TN、Na~+、K~+、Ca~(2+)、Mg~(2+)、Fe、Mn等养分元素进行测定,以研究4个林龄之间降水化学性质的差异。
6) secondary birch forest(SBF)
次生白桦林
1.
secondary birch forest(SBF),secondary conifer and broad-leaved mixed forest(SCBF),and original broad-leaved Korean pine forest(OBPF),from the early successional stage to mature forest understory were investigated by using sweeping nets,light traps and pitfall traps.
昆虫多样性变化对生态系统健康有重要的指示作用,为研究昆虫群落变化与生境演替之间的关系,本研究采用网捕、灯诱和诱捕法系统调查了长白山针阔混交林不同演替阶段(次生白桦林、次生针阔混交林、原始阔叶红松林)昆虫群落的组成和多样性,分析了昆虫在森林演替过程中的规律及与植被群落之间的关系。
补充资料:桦林公园
桦林公园是以天然撵树为主要景观而建成的园林,总面积52.5公顷。它位于阿勒泰市区的西北角、克兰河上游的一处河漫滩地带,地势较平坦开阔,克兰河水将其分割为六个小岛,形成了林水相间的秀丽景色。
桦林公园又名“都统岛”,据说是当年一位都统于此避暑而得名。40年代,阿山动乱,撵林毁于战火,一片凄凉。然而天公作美,野火烧不尽,春风吹又生。今天园中的林木几乎全是后来自然生长起来的次生林木。树龄一船超不过50年,然而林育则旺,草育则盛,桦林恢复了昔日的光彩。
桦林公园与一般的人造公园不同,它依山傍水,自然林木、河水、花草融为一体。树种为寒温带山地阔叶次生林,以白桦树为主,青杨次之。林间杂生有野蔷薇、锦鸡儿、绣线菊、黑醋粟、野刺攻等十多种灌木,林下及空地生长有萎陵菜、野薄荷、草昧、白三叶草、红三叶草、草木樨、黄花苜蓿、黄蒿、白蒿等各种草本植物,在低尘湿泽处生有菖蒲、芦苇、莎草、苔藓等。夏日园内要比外界温度底2℃---4℃,在亭亭立的白桦挥树下,芳草如茵,溪水潺潺,林间百鸟啾啾、鱼儿游于浅水,游人如织。秋天,金风送爽,碧空如洗,层林尽染,一片金黄,景色更加迷人,让人流连记记忘返。冬日,公园银装素裹,树影婆婆,与蓝天相映成辉,别有一番情趣。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。