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ground vegetation
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  地面植被
     Because of a little studies on the relationship of the biodiversity of Yellow River Delta with abut regions by Yel-low River been made,based on the existing researches and the investigating on ground vegetation in Sep.2003 and Oct.2004,we statistically analyzed the flora composition and the biodiversity correlation between Yellow River Delta and the abut regions.
     鉴于已有的研究工作对黄河三角洲地区生物多样性通过黄河与周边地区的联系方面的研究相对薄弱,以现有研究工作为基础,以黄河的廊道作用为主线,并结合2003年9月和2004年10月两次实地地面植被调查,主要对黄河三角洲自然保护区的植物区系组成状况进行统计分析,总结出黄河三角洲地区生物多样性状况、植物区系组成的特点及其与周边地区的相互关系。
短句来源
     Electromagnetic scattering characteristics of ground vegetation in a half-space model are studied.
     本文给出了地面植被电磁散射的半空间模型研究方法.
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     The author holds the view that forest vegetation condition is the basic factor that affects water table and spring emergence in Jinan City,and puts forward a suggestion that a large scale construction of ecological project to enrich grourdwater with increase in ground vegetation is a main measure for preserving spring.
     认为森林植被状况是影响济南市地下水位和泉水涌量的根本原因,提出了以大规模生态工程建设,增加地面植被,丰富地下水源,作为保泉基本措施的建议。
短句来源
     The species number of arthropod on the grape trees in intensive management grapery was not significantly different from that in extensive management grapery,while on the ground vegetation,it was significantly different (P<0.05).
     葡萄树上节肢动物物种数差异不显著,地面植被上物种数差异显著(P<0.05);
短句来源
     Spectrum and space information of rocks and soils can be reduced,covered or shielded by growth of ground vegetation to a certain degree.
     地面植被的发育,在一定程度上,弱化、掩盖或屏蔽了岩石和土壤的光谱和空间信息。
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  地表植被
     Differences in ground vegetation and soil characteristics in adjacent birch and spruce stands of southern Sweden
     瑞典南部相邻桦树和欧洲云杉林分的地表植被和土壤特征(英文)
短句来源
     Differences in ground vegetation and soil characteristics were studied in 23 adjacent birch and spruce stands in southernmost Sweden.
     对瑞典南部 2 3对相邻的桦树和欧洲云杉林分的地表植被和土壤特征进行了研究。 桦树和欧洲云杉林分曲芒发草( Deschampsia flexuosa L.)
短句来源
     2. From 1992 to 2000, the regions that ground vegetation cover trends improved primarily include the exterior ring of oasis in South Xinjiang, the south exterior ring of oasis in Zhungaer Basin, the region of Qitai-Mulei-Beita Mount, etc.
     2. 1992-2000年,新疆地表植被覆盖改善的地区主要包括南疆各绿洲外缘、准噶尔盆地南侧的绿洲外缘和奇台-木垒-北塔山等地区;
短句来源
     Finally,the regression(equations) between the researched soil physical properties and altitude,soil aspect,slope gradient,slope position,soil depth,and ground vegetation coverage were established.
     其次,还建立了土壤物理性质与海拔、坡向、坡度、坡位、土壤深度、地表植被覆盖度等之间的回归方程。
短句来源
     Nature precipitation increase have take advantage of streamflow increasing in Tarim and ground vegetation growing River . But climate change of the lower reaches is not consistent with the upper and middle reaches in Tarim River basin. The deterioration of ecological environment in the lower reaches have something to do with the climste change.
     认为近30年尤其是90年代以来塔里木河流域上中游气候条件总的来讲是向好的方面变化,其自然降水的增加十分有利于塔里木河流域内各河流水量的稳定增加和地表植被的生长 ,但塔里木河流域下游气候变化与上中游并不完全一致 ,有自身的特点,而这种差异与下游生态环境的恶化有着密切的关系。
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  “ground vegetation”译为未确定词的双语例句
     the water capacity of ground vegetation of stands was respectively 49.2, 27.2 and 15.8 times of control;
     林分地上部分涵蓄水分功能远大于对照 ,分别是对照的 4 9.2 ,2 7.2和 15 .8倍 .
短句来源
     NUMERICAL SIMULATION STUDY FOR THE EFFECT OF GROUND VEGETATION TYPE ON NORTH CHINA SUMMER PRECIPITATION
     陆面植被类型对华北地区夏季降水影响的数值模拟研究
短句来源
     (6)The seed relativity between soil seed banks and the ground vegetation were not tight,and the relativity decreased with the development from the herbosa stage to tree-shrub stage.
     (6)地上植被与土壤种子库的相关性不管在早期阶段还是中后期阶段都不紧密,而且从草丛阶段向乔灌林阶段演替,两者之间的相关性有降低的趋势。
短句来源
     In view of what follows the status of great varieties of ground vegetation in shanghai, the paper probes into the prospects for application of bulb perennial root flowers and plants in shanghai's gardening and greenery in combination with the advantages of those plants.
     根据上海在地被植物中大量作用草花存在的问题,结合球宿根植物的优势,探讨了球宿根花卉在上海园林绿化中的应用前景。
短句来源
     Microclimate effects of the forests have a direct bearing on the restoration of ground vegetation and canopy closure.
     此外 ,马尾松幼林的小气候效应与活地被物恢复和林冠郁闭密切相关 .
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  ground vegetation
It is shown that the activities of these animals affect the vertical structure of the underbrush and understory layers, the dynamics of phytomass accumulation, and the state of the ground vegetation.
      
Under the effect of periodic ash fallout (in the absence of glacial activity), communities are formed that contain increased proportions of xerophytes and species preferring sites with a disturbed ground vegetation cover.
      
Transformation of ground vegetation under the effect of fires in pine forests of Middle Siberia
      
The NPP estimation derived from satellite remote sensing data agrees with the ground measurement data within the error range of 15% when all above-ground vegetation NPP is calculated for different vegetation classifications.
      
These two groups of localities did not differ in exposure, altitude, inclination, soil structure and cover of ground vegetation.
      
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Describes the natural regeneration of various types of pinus armandii forests in Qinling mountain forest region. Natural regeneration at the mountain foot and the stream side was much better than that of the mixed forests with grasses or shurbs. Regeneration of the forests a.t cliffs or the forest mixed with bamboos was underdeveloped. The regenerated saplings and seedlings on cleared areas were complicated with certain proportion of. non-objective tree speices. The relationships between natural regeneration...

Describes the natural regeneration of various types of pinus armandii forests in Qinling mountain forest region. Natural regeneration at the mountain foot and the stream side was much better than that of the mixed forests with grasses or shurbs. Regeneration of the forests a.t cliffs or the forest mixed with bamboos was underdeveloped. The regenerated saplings and seedlings on cleared areas were complicated with certain proportion of. non-objective tree speices. The relationships between natural regeneration and cutting and skidding system, canopy closure, litter layer thickness, the depth of soil layers, topography, understorey or ground vegetation were analyzed. Considerations for the management and utilization of the forests were also suggested.

山坡下部和溪旁的华山松林,天然更新良好,草类、灌木华山松林次之,峭壁华山松林和竹子华山松林最差。采伐迹地上的更新幼苗幼树组成复杂,非目的树种占有一定比重。此外,分析了采伐方式、集材方式、林分郁闭度、枯落物厚度,土壤厚度,地形、下木及活地被物与华山松天然更新的关系,提出经营利用秦岭林区华山松林应注意的问题。

Cultivation of fast growing tree species which has a high demand for nutrientsin soil tends to lead to the decrease of soil fertility. Early in the initial period of 19th centu-ry, attention had been paid to the soil fertility in plantations. In early period inEurope, and in recent years in New Zealand, Australia and areas of Chinese fir For-ests in South China, decrease of soil fertility in monocultured plantations were and arerepeatedly reported. The causes are consumption of soil fertility by trees, theinadaptability...

Cultivation of fast growing tree species which has a high demand for nutrientsin soil tends to lead to the decrease of soil fertility. Early in the initial period of 19th centu-ry, attention had been paid to the soil fertility in plantations. In early period inEurope, and in recent years in New Zealand, Australia and areas of Chinese fir For-ests in South China, decrease of soil fertility in monocultured plantations were and arerepeatedly reported. The causes are consumption of soil fertility by trees, theinadaptability of edaphic conditions and the improper forest management measures. Inthis paper an analysis is emphatically made of the effects on soil fertility of cycle of rota-tion, form of utilization of the felled trees, way in cleaning the slashes and ground veg-etation, management measures such as farming practice site preparation, nitrogen fix-ing plants and plants adding fertility to soils. In order to stabilize the level of soilfertility, in addition to observing the rule of suitable tree species for suitable sites, andavoiding concentrated planting of the same tree species in large areas, care should betaken in handling the following problems: (1) relative prolongation of the cycle of rota-tion, which is better to be longer than the quantitative maturity. (2) In felling, onlythe trunk is used, and utilization of the whole tree is harmful. (3) Burning of slashesand ground vegetation often leads to great loss of nutrients to soil. (4) High intensity ofsite preparation and tilling is unfavorable to the preservation of organic matter and nitro-gen, though it may be conductive to the growth of young stands for the time being. (5) Attention should be paid to cultivating nitrogen-fixing plants and plants addingfertility to soils, which can contribute greatly to the increase of soil fertility.

栽培生长迅速和对土壤肥力要求高的树种,有导致地力下降的趋势.早期欧洲,近期新西兰、澳大利亚以及我国南方杉木林区,都有人工林地力下降的报道.从林业技术措施来说.促进人工林地力下降的主要因素有轮伐期短、全树采伐利用、火烧清理采伐剩余物和强度整地等。栽培固氮植物和肥土植物,可显著改善土壤肥力.在造林中遵循适地适树的原则,避免同一树种的大面积集中连片,也有助于地力的维持.

The effect of Ageratum conyzoides as the ground vegetation interplanted in hilly citrus orchard in Hunan Province on mite and insect populations was studied. The habitat of citrus orchard could be improved by this till - less interplantation condition, the RH in summer and temperature in winter were increased, and the summer temperature in canopy and soil were decreased, which were beneficial to the survival of natural enemies. The vegetation could provide alternative food and living and oviposition...

The effect of Ageratum conyzoides as the ground vegetation interplanted in hilly citrus orchard in Hunan Province on mite and insect populations was studied. The habitat of citrus orchard could be improved by this till - less interplantation condition, the RH in summer and temperature in winter were increased, and the summer temperature in canopy and soil were decreased, which were beneficial to the survival of natural enemies. The vegetation could provide alternative food and living and oviposition site for predatory mites,suppress the autumn damage and alleviate the spring damage of citrus red mite Parmychus ctiri(McGregor) .and also reduce the damage of citrus leaf -miner Phyllocmstis citrella (Stainton)in spring;while the damage of citrus flower midge Con-tarinia citri Barnes and longicorns were increased. It could enhance the tolerance of citrus to drought and cold,improve the soil structure and fertility,increase the quality and yield of citrus fruit, and reduce the cost of control. The effect of control tactics, irrigation system and growth situation of A. cunyzoides on the citrus red mite control by Ageratum interplantation were discussed.

作者评价了湖南丘陵桔园间种藿香蓟对桔树螨类和昆虫的影响。桔园间种藿香蓟、免耕蓄草能改善桔园的小生境,提高桔园夏季相对湿度和冬季温度,降低夏季树冠和土壤温度,创造一个有利于天敌生存的良好环境;能提供钝绥螨的交替食料和栖息、产卵场所;能控制柑桔全爪螨的秋季为害,减轻柑桔全爪螨的春季为害和柑桔潜叶蛾的为害,但加重了柑桔花蕾蛆和天牛类害虫的为害。能提高树体的抗旱和抗寒能力,改善土壤结构,增加土壤肥力,提高柑桔品质和产量,降低防治费用。文中还评价了防治策略、灌溉方式和藿香蓟的长势等因素对间种藿香蓟控制柑桔全爪螨的作用。

 
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