查询词典 protection forest

There are more than 2,000 plant species, with 178 branches of higher plants, 611 genera and 1158 kinds, of which 73 tree species are 473 kinds of Section 181, accounting for 80% of tree species in Guangdong, mainland China, 25 kinds of state protection, accounting for 67 to 37% of the , there is a protected plant yew trees horses, Fujian cypress, Tsuga-bin, sightseeing wood, etc., and Guangdong-Song 207 kinds of medicinal plant resources; county's forest coverage reached 73.1% and the stumpage volume of 5.34 million cubic meters m.

植物种类有 2000多种，具有高等植物178科，611属，1158种，其中乔木树种73科181属473种，占广东大陆树种的80%，国家保护的25种，占全国67种的37%，有一级保护植物红豆杉、伯乐树、福建柏、长苞铁彬、观光木、广东松等以及药用植物资源207种；全县森林覆盖率达73.1%，活立木蓄积量达534万立方米。

On the basis of the grey related result, six factors including soil saturated water-holding ability, soil non-capillary porosity, lower shrubs and grass coverage, litters height, soil water infiltration rate, forest canopy density have been selected as the indexes to assess the water-conserving and flood-controlling function of protection forests.

根据灰色关联度的分析结果，挑选出了包括土壤饱和持水力、土壤非毛管孔隙度、灌草层盖度、枯落物厚度、土壤入渗速率、林分郁闭度在内的影响库区防护林植被理水调洪功能的6个主导因子，并将这些因子作为筛选库区高效理水调洪型防护林植被群落的指标。

At the same time, we have successfully received a large number of party and state leaders, foreign heads of state and international friends; successfully held a number of session of the International Forest Protection Festival and the world aerobatic competition, which won a reputation for Zhangjiajie expanded visibility.

同时，我们成功地接待了一大批党和国家领导人、外国元首及国际友人；成功地举办了数届国际森林保护节及世界特技飞行大赛，从而为张家界赢得了声誉，扩大了知名度。

Sand'.'' protection and control, and research and apply optimized plantation of indeciduous forest and grass, and selection and breeding of indeciduous plant for ''.

治理'。''模式研究；常绿林草优化种植、防沙治沙抗旱常绿植物的选育及装备技术研究与应用

It is of great significance in the protection of ecological resources, for the maintainance of the ecological system equilibrium in mountained agriculture and the preservation of large areas of virgin forest and great amount of biological species.

它维系了山地农业的生态平衡系统，又保护了大片原始森林，保存了大量的原生物种，对西南边疆的生态资源有重要的保护意义。

Kanas National Nature Reserve is the unique Europe-Siberian plants and animals region within palaearctic distribution in China and has obvious value of protection and research. Like other forests lied in cold temperate district, natural fire disturbance, one of the most important disturbance factors in taiga, improves continually the succession of forest in Kanas National Nature Reserve.

喀纳斯作为阿尔泰山的一颗璀璨明珠，浓缩了阿尔泰山自然生态系统和景观的精华，保存有以泰加林为代表的原始生态系统，系我国惟一的古北界欧洲-西伯利亚动植物分布区，具有很高的自然保护价值和科学研究价值。

The coast forest onion onion, in green grass cushion cushion, the lake the blue water is clear, near the lake alley, the pebbles shoal, the stair slope protection, the countless changes, causes the lake shore smoothly to stand erect from time to time, the edges and corners are distinct, from time to time the mountain riddlings fold, completely relaxed.

沿岸林木葱葱、绿草茵茵、湖中碧水粼粼，临湖小路，卵石浅滩，台阶护坡，变化无穷，使湖岸时而平滑直立，棱角分明，时而山石层叠，令人心旷神怡。

Firstly, influenced by climate, topographical feature, soil and hydrological and geographical features, there was drought, flood, salinification, desertification and barren in Daxing, biological protection is necessary as a protective barrier to control sand from Yong Dinghe River bed Secondly, the windbreak system has features of urban forestry with aesthetic character and reasonable forest structure and arrangement.

首先，受气候、地貌、土壤和水文地质等多种因素制约，旱、涝、碱、沙、瘠等自然灾害普遍存在，防护林体系的生态环境保护作用应当得到充分体现，要成为首都&南大门&的生态屏障保护及永定河沙地的风沙源控制带。其次，要体现大城市城郊防护林体系的建设特点，布局合理，结构合理，具有一定的风景美学价值。

Most herbivores feed in secondary forests because pioneer species in secondary forests do have little or no mechanical or chemical protection against herbivores and many early and late seral tree species in secondary forests produce edible fruits in large quantities. Environment and fire have some effects on secondary forest succession. In early succession, relatively more biomass is allocated to resource acquiring tissues and in later stages more is allocated towards structural materials.

大多数食草动物喜欢在次生林中取食，因为次生林中的先锋树种很少或没有机械和化学保护和林内许多树种产生大量可食用的果实；环境和火对次生林演替有一定影响；在早期的演替过程中，更多的生物量分配到资源需求旺盛的组织，在演替晚期阶段，更多的生物量则分配到结构组织中。

The research can provide theoretical reference to ascertain work intensities of Erector spinae for forestry worker under different forestry work conditions,which has important theoretical value to quantificationally study loads and labor intensities of the lumbar muscles for the forestry workers under different forestry work conditions,to prevent and decrease the lumbar traumas,to provide laboring safety and protection,to diagnose and correct unreasonable operating postures,to train the labor skills,to design and improve forest operating tools,to prevent and treat the occupational diseases.

本研究为确定不同林业操作中劳动工人腰背部肌肉工作强度提供理论参考，为定量研究在不同林业作业中操作工人的腰背部肌肉及脊柱所承担的工作负荷以及劳动强度理论依据，并对于预防和降低林业作业工人腰部损伤、提供劳动安全与保护、诊断和矫正不良作业姿势、进行劳动技能培训、指导设计与改进林业生产工具、职业病的预防与治疗等具有重要的理论价值。

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。