查询词典 eucalypt

Trek the Pulpit Rock Track past swamps, eucalypt forests and open heathland to be rewarded with a 280-degree panorama of the blue gum forest of Grose Valley.

在圣坛石路径上远足，途经沼泽、桉树林和开阔的荒原，最终领略到格罗斯山谷蓝桉树林的 280 度全景。

Learning and studying the advanced technologies and experiences of eucalypt wood utilization from other countries, the utilization le...

通过学习和借鉴国外桉树木材加工利用的先进技术和经验，以提高我国桉树木材的利用水平。

There was no enough evidence to prove the allelopathic effects in eucalypt trees.(4) The effect of eucalypt on ecosystem stability of the soil was caused b

桉树对土壤生态稳定性的影响受客观条件和人为经营共同决定的，桉树本身并不是导致土壤生态稳定性降低的主要原因。

There are rich resources of natural eucalypt forest in Australia.Brazil is one country with the highest intensive management level of eucalypt plantation in the world.

澳大利亚具有丰富的桉树天然林资源；巴西是世界上桉树人工林集约经营水平最高的国家。

This paper reviews the status of resources and utilization of wood from eucalypt plantation abroad from the viewpoints of eucalypt resources, wood properties, processing technologies and market development.

摘 要：从桉树人工林的资源现状、桉树人工林的木材性质、加工利用技术以及桉树木材产品的市场发展4个方面，概述了国外桉树人工林的发展及其木材利用状况。

Of this, eucalypt plantations account for 170,000 ha, and hence Zhanjiang now has the largest eucalypt resource of any city in China and some have even called it the "Eucalypt Kingdom" of China.

经过10多年的持续经营，湛江已发展桉树17万公顷，成为中国最大的桉树生产基地，被誉为"桉树王国"。

Learning and studying the advanced technologies and experiences of eucalypt wood utilization from other countries, the utilization level of eucalypt plantation in China will be promoted in the near future.

通过学习和借鉴国外桉树木材加工利用的先进技术和经验，以提高我国桉树木材的利用水平。关键词：桉树人工林，资源，木材，加工利用，市场发展

So, the short period eucalypt as industry material has huge market potential. The cutting of eucalypt can increase the supplement of the timber in the province. It can also relax the conflict of the supplement and requirement of timber, and ease the pressure of forest resource especially the savageness forest.

因此，桉树短周期工业原料用材林有着巨大的市场潜力，桉树砍伐后，将增加省内木材的有效供给，缓解贵州省木材供需矛盾，可减轻现有森林资源特别是天然林资源保护的压力。

The results showed that there existed variation among eucalypt families in wood physical-mechanical properties and wood chemistry. There were significant differences among E.pellita families、E.grandis families and E.urophylla譋.grandis clones in wood colors as well as between Strains and within trees.The variation of the surface wetability of wood between E.grandis families and E.urophylla譋.grandis clones were significant.Even in the same families level or clones level,there still existed the same regulation. The degree of collapse of eucalypt had a large relation in the amount of tylosis in vessel and vestured pits on the cell wall of vessel. The more rich tylosis and vestured pits in vessels,the more probability to occur collapse for eucalypt.The biggest moment collapse was probably the critical point of the drying degrade.During the fomulation of drying technology,it is necessary to adopt moderate condition to make the vessels which had formed the biggest moment collapse at the biggest moment collapse resume,especially to prevent the permanent set.At the normal temperature level,the main factors which influenced residual collapse were the contents of ray parenchyma and axial parenchyma .Nearly all the cells joined the course of forming the moment collapse and biggest moment collapse.Interval drying was fit for eucalypt plantation which was easier to make collapse.

研究表明：桉树不同家系间木材物理力学性质和化学组成存在差异；粗皮桉家系间、巨桉家系间、尾巨桉无性系间材色存在显著差异，株间、株内木材材色存在变异；桉树木材表面润湿性在巨桉家系间、尾巨桉无性系间存在着显著差异，在同一家系或同一无性系中，株间和株内也存在着相同的变化规律；桉材皱缩程度与其导管中侵填体的多少和导管壁上纹孔具有的附物多少密切相关，侵填体含物越丰富，纹孔附物越多，桉材越容易皱缩；最大瞬间皱缩是能产生更大干燥降等的临界点，在制定干燥工艺时，必须在最大瞬间皱缩发生时，采用温和条件，使已产生最大瞬间皱缩的细胞尽可能多的恢复，尤其不能使其产生永久变定；在常温条件下，影响残余皱缩的主要因子是射线薄壁细胞和轴向薄壁细胞含量；而对于瞬间皱缩和最大瞬间皱缩，几乎所有细胞都参与它们的形成过程；对于易皱缩的桉树木材，间歇干燥是最有前途的干燥方法。

The results showed that the species richness,the speciesdiversity and its biomass of understorey vegetation decreased with the stand age in-creasing.There was the most significant negative-linear relationship between thiskind of changes and age.It is possible that the certain shading condition may benefit to understorey growing better.The richness,diversity index and biomass of thevegetation in eucalypt plantation decreased with CPR increasing,however,after ro-tating by watermelon one rotation,the richness,the diversity index and biomass ofunderstorey in CP stand increased,this result will provide the possibility of therestoration and reestablishment of vegetation in eucalypt plantations.The nutrientstorage of understorey decreased in accord with the productivity decreased withCPR increasing,this is the result which the stand enviroment became worse and thestand stratum competed with the vegetation for the water and fertility of soil.

结果表明，随着年龄的增长，桉树林下植被物种丰富度降低，多样性减少，生物量下降，这种变化趋势与年龄存在极显著的负线性关系；随着造林密度的增加物种丰富度降低，多样性也下降，但林下植被生物量尚有增加，可能是一定程度的庇荫有利于桉树林下植被的生长；随连栽代次的增加，桉树林下植被丰富度降低，多样性指数下降，生物量减少；但在轮作一茬西瓜后的林地，物种丰富度提高，多样性指数升高，生物量增加，为桉树林下植被的恢复与重建提供了可能性；随连栽代次增加，林下植被养分总量逐代下降，与生产力下降一致，这是林分环境恶化后上层乔木和林下植被对水肥竞争的结果。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。