1) artifical Larix gmelinii forest
人工落叶松林
1.
Precipitation hydrochemical characteristic in virgin Pinus koraiensis forest and artifical Larix gmelinii forest in Liangshui National Nature Reserve;
凉水国家级自然保护区原始红松林和人工落叶松林降雨的水化学特征
2) Larch plantations
落叶松人工林
1.
The research was made that the change of component of soil humic substances in larch plantations and its effects on the soil acidity at the different development stages (young stand, half_mature stand, near mature stand, mature stand and young stand in the second rotation).
对落叶松人工纯林不同发育阶段幼龄林、中龄林、近熟林、成熟林及二代幼龄林土壤腐殖物质组分变化及其对酸度的影响进行研究,以次生林和一代幼龄林为对照,比较不同发育阶段落叶松人工林与天然次生林、一代幼龄林与二代幼龄林土壤有机质含量、腐殖物质组分特征的差异。
2.
After 50 years forestation, the larch plantations have already became near-mature forest or mature forest and been the important commercial forest base now.
落叶松是我国北方林区主要的造林速生树种之一,经过50多年的森林营建,落叶松人工林大部分已进入近熟林、成熟林阶段,已成为我国重要的用材林基地。
3) larch plantation
落叶松人工林
1.
Effect of major environment of canopy openness produced by thinning in larch plantation;
落叶松人工林开阔度的主要环境效应
2.
The effect of Zeiraphera lariciana and Zeiraphera grisecana on growth of larch plantations;
两种线小卷蛾对落叶松人工林生长的影响
3.
Soil acidity change of Larch plantations and relation between change and inorganic phosphorus types;
落叶松人工林土壤酸度变化与无机磷形态的关系
4) Larix olgensis plantation
落叶松人工林
1.
The soil degradationin in Larix olgensis plantations, to a certain extent, has been found.
落叶松人工林土壤质量存在着不同程度的下降问题。
2.
Models for simulating locational distribution of total branches, both along and around the bole, and for estimating crown profile of primary branches within live crown were developed in a 26-year-old Larix olgensis plantation based on the circular branch analysis technique.
本文以26年生长白落叶松人工林为研究对象，利用团状枝解析的方法，研究了主要枝条在树冠内的分布(包括垂直分布和水平分布)，构建了树冠构筑型模型，及主要枝条基径和枝长的生长特征和生长动态。
3.
This study was conducted based on the common characteristics of low mixture degree and uniform distribution of Larix olgensis plantation in a 15-year-old plantation.
(2) 15%左右为15年生落叶松人工林最优的间伐强度,空间优化达到最佳,优化后林分竞争态势减小,生长空间利用程度增大,林分空间结构得到改善,模拟20年、25年生林分空间结构优化经营,最优的间伐强度为15%、10%左右。
5) Larix principis-rupprechtii Plantation
华北落叶松人工林
1.
Effects of thinning on edge effect of Larix principis-rupprechtii plantation
间伐对华北落叶松人工林边缘效应的影响
2.
The problem are being brought out on cutting and regeneration of Larix principis-rupprechtii Plantation in a large scale in semi-arid region.
我国半干旱地区华北落叶松人工林正面临大面积采伐更新的问题,其采伐迹地更新树种选择的成败事关生态建设和经济发展的双重主题。
3.
The experiment is carried out in 32 year old Larix principis-rupprechtii plantation,combining the experimental results of soil water and nutrient.
针对半干旱地区华北落叶松人工林传统密度控制理论的弊端,以32年生华北落叶松人工林为研究对象,通过对土壤水分和养分的测定结果,结合华北落叶松人工林多年的生长表现,提出根据水分和养分环境容量来确定人工林合理密度的新方法,为半干旱地区华北落叶松人工林的可持续经营提供科学依据。
6) Larix olgensis plantation
长白落叶松人工林
1.
Effects of thinning on microsites and natural regeneration in a Larix olgensis plantation in mountainous regions of eastern Liaoning Province, China;
间伐对辽东山区长白落叶松人工林生境和更新的影响(英文)
2.
It is to determine the best soi I conditions of Larix olgensis plantation by researching the relationship of the soil environment conditions to plantation productivity.
通过研究长白落叶松分布区内的土壤环境条件与林木生产力之间的关系，确定培育长白落叶松人工林的最适宜土壤条件，这些指标既是营造长白落叶松人工林立地选择的标准，又是检验现有林立地生产力下降的依据。
补充资料：人工受精与人工授精
人工受精与人工授精
artificial fertilization and artificial insemination
我国学者把“人工受精”与“人工授精”两名词区别开来：前者指人工体外受精而言，后者指把精液注入到妇女的阴道或宫颈管、宫腔内，使精、卵在体内相遇。人卵体外受精与胚胎移植后出生的婴儿俗称试管婴儿。
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