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forest belts
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  林带
     Dimensional pasture land shelters should be penetrating types,whose distance between forest main belts should be 150-200m,distance between second forest belts are recomanded as 200-300m, the forest belt form 5-8m wide and row spacing 1 ̄3m, number of rows ranging from 2 to 4 are regarded suitable.
     营造复合型护牧林应为疏透型,主林带间距150~200m,副林带间距200~300m,带宽5~8m,株距1~3m,行数2~4行比较适宜。
短句来源
     The Theory and Application of Fire-resistant Forest Belts
     防火林带的理论与应用
短句来源
     On the basis of the calculation on several annual evaluation indices of the whole benefits of the shelter forests of farmland in Zhangbei county, the balanced revenue and expenditure tree height for forest belts was culculated as 4 64 meters, the balanced revenue and expenditure time as 7 5 years, the benefit compensation time as 15 3 years, and the benefit compensation tree height as 8 7 meters.
     通过对张北县农田林网个别年度及整体效益评价指标的计算,推算出林带收支平衡高度为4.64m,收支平衡年为7.5a,效益补偿年为15.3a,效益补偿高度为8.7m。
短句来源
     Inthe forest belts which were against wind and wide 2 -- 3 times as much as the height oftrees, yield of cotton increased by 13. 0% -- 38. 1%, as compared with the controls. In the testedarea affected by the forest beltS. yield of cotton increased by 8. 4% on average.
     林带背风而树高2~3倍地区为林带增产作用的显著范围,棉花产量比对照区增产13.0%~38.1%,除林缘等胁地外,受林带有利影响测试区棉花产量平均增产8.4%。
短句来源
     Controlling effects of forest belts on non-point source pollution of agricultural lands in Taihu Lake area, China
     林带对太湖地区农业非点源的控制效应研究(英文)
短句来源
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  “forest belts”译为未确定词的双语例句
     Study on Mechanism of Fire-preventing Forest Belts
     防火林带阻火机理研究
短句来源
     Predicting dynamics of soil organic carbon mineralization with a double exponential model in different forest belts of China
     利用双指数模型预测中国不同森林带土壤有机碳矿化的动态变化(英文)
短句来源
     In the context of experimental observations and the quadratic regression revolution design, a group of models are established for three controllable cultivation factors and dynamic indices of wheat mass development between forest belts, with the yield effect related to one and all of the factors investigated, thereby sorting out an optimal scheme to provide assistance for normalized cultivation and prediction and control in advance of the crop for purposes of high yield.
     运用二次回归旋转设计,由田间试验实测参数建立了小麦3项栽培措施与林下产量群体发展动态指标值的数学模型群,并解析了栽培因素的单独产量反应及其交互作用,优选出林下小麦最佳栽培措施组合方案,对规范化种植及高产预测预控提供信息
短句来源
     A STUDY ON THE CORRELATION BETWEEN THE SHADES OF PAULOWNIA FOREST BELTS AND THE MODEL OF PAULOWNIA-APPLE-CROP INTERCROPPING
     泡桐林带遮光与桐果农间作模式的研究
短句来源
     The Placement Observation Experiment on the Comprehensive Protective Benefit of Field Forest Nets of Coastal Forest Belts in Dongfengyang, Fuqing City
     福清市东风洋海岸林带农田林网综合防护效益定点观测试验
短句来源
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  相似匹配句对
     forest .
     林。
短句来源
     THE DEVELOPMENT OF FIRERESISTANCE FOREST BELTS RESEARCH
     防火林带研究进展
短句来源
     The Application and Besearch of Fire Break Forest Belts
     防火林带的应用与研究现状
短句来源
     Forest Trends
     森林趋势组织
短句来源
     On Decorations Jade Belts
     漫谈玉带饰
短句来源
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  forest belts
unguiculata, is cultivated for its fresh pods and leaves in the derived savanna and forest belts of southeastern Nigeria.
      
Priority areas are concentrated in scarp and coastal forest belts, regions of comparatively recent evolutionary activity with high species richness.
      
The T'OLCHE', a Maya system of communally managed forest belts: the causes and consequences of its disappearance
      
Predicting dynamics of soil organic carbon mineralization with a double exponential model in different forest belts of China
      
Based on model of buffering forest belts, the width ratio of farmland to forest is determined between 100 to 40 and 150 to 40, because it not only can purify water, but also occupy less farmland.
      
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Since 1976, we have determined the purification effects of air pollution by three structures, namely, forest-belt, hedgerow and scattered tree planted in Shaoxing Iron and Steel Factory. The results showed that the rates of purification by forest-belt in the distance 1, 10, 50 and 100 meters away from the edge of forestbelt are 18%, 33%, 47% and 57% respectively. Among the different density of forest-belt structure the sparse one is the most effective. The rate of purification...

Since 1976, we have determined the purification effects of air pollution by three structures, namely, forest-belt, hedgerow and scattered tree planted in Shaoxing Iron and Steel Factory. The results showed that the rates of purification by forest-belt in the distance 1, 10, 50 and 100 meters away from the edge of forestbelt are 18%, 33%, 47% and 57% respectively. Among the different density of forest-belt structure the sparse one is the most effective. The rate of purification by hedgerow is averagely 43%, and its effect raises with an increase in height of hedgerow. The effects of purification by scattered tree varied with tree species, weight of leaves and size of leaf area. The tree species which is heavier in leaves weight and larger in leaf area is higher in purification effect, and which of the five tree species determined here is averagely 43%. The authers considered that forest-belt, hedgerow and scattered tree are all good for purification effect, therefore, tree planting in and around factory is an important mearsure to control air pollution.

自1976年以来,我们对绍兴钢铁厂设置的林带、绿篱、散生树三种结构的空气净化效应进行了测定研究。研究表明,在距林带边缘 1米、 10米、 50米、100米处的林带的净化率分别达到18%、33%、47%、57%,不同的林带结构以疏透型的最好;绿篱的净化率平均可达43%,而且绿篱的高度越高,影响的距离越远;散生结构的净化率则因树种而异,影响净化率的主要因子是叶量和叶面积,叶量多、叶面积大的树种净化率高,本文测定的5个树种的平均净化率达到43%。笔者认为工厂区内各种形式的绿化对大气污染都有良好的净化效应,工厂绿化是防治大气污染的一项重要措施。

The rodents and their ectoparasites were catched from Altai Mountains situated in Fuyun County, the around of Altai Town and the forest belt by Hanasi Lake. 385 rodents composed of 17 species belonging to 12 genera out of 4 families were catched, in which the Apodemus speciosus ( 3 specimens) is a new record in Xinjiang. 810 specimens of fleas composed 25 species belonging to 16 genera out of 4 families were collected, including 2 new species and 2 new recordes in China. 21 species of gamasid mites were...

The rodents and their ectoparasites were catched from Altai Mountains situated in Fuyun County, the around of Altai Town and the forest belt by Hanasi Lake. 385 rodents composed of 17 species belonging to 12 genera out of 4 families were catched, in which the Apodemus speciosus ( 3 specimens) is a new record in Xinjiang. 810 specimens of fleas composed 25 species belonging to 16 genera out of 4 families were collected, including 2 new species and 2 new recordes in China. 21 species of gamasid mites were obtaided and it filled in the gap in this field of Altai area. The distributive characters of main pestilence rodents and their ectopa-sites and the epidemiological significance of them are described as well.

本文报告了富蕴县阿尔泰山地、阿勒泰城镇周围山地和哈纳斯湖畔林间所捕获啮齿动物及其体外寄生物。共捕获啮齿动物385只,隶属4科、12属、17种,其中有大林姬鼠(Apodemus speciosus)3只,该鼠为新疆新记录。共获蚤类810只,隶属4科、16属、25种,其中包括2个新种和2个国内新纪录。革螨21种,填补了阿尔泰山地的空白。同时概述了主要疫源动物及体外寄生蚤的分布特点及其流行病学童义。

The vegetations in Mosuowan Desert are seriously damaged.The desertthere is intensively activated with the characteristics of lower and shortcommunica flora,small vegetations,sparse and unshading coverages, whichhas the tendency of moving and semi-moving.Because of the wintersnowcover and the spring rainfall,a humid-sand layer is breeded in thedesert,which is favourable for H.persicum regeneration.According to fieldinvestigation in the typical area,the population structure of H.persicumis tend to grow.Therefore,...

The vegetations in Mosuowan Desert are seriously damaged.The desertthere is intensively activated with the characteristics of lower and shortcommunica flora,small vegetations,sparse and unshading coverages, whichhas the tendency of moving and semi-moving.Because of the wintersnowcover and the spring rainfall,a humid-sand layer is breeded in thedesert,which is favourable for H.persicum regeneration.According to fieldinvestigation in the typical area,the population structure of H.persicumis tend to grow.Therefore, we must avoid grazing or chopping the adult H.persicum by stock and man in order to assure the natural regeneration.Insome areas with good conditions,seed can be sown artificially for supple-mentary regeneration.In addition,it is necessary to restore the natural co-verage out of the oasis, so as to resist the wind-sand encroaching into oasis.We should rationally utilize and develop the ecological superiority of H.persicum which is suitable to desert,and greatly establish forest-belt com-bining with the supplementary regeneration.

莫索湾沙区自梭梭群落破坏严重,造成大面积沙丘重新活化而裸露。然而,这里冬春多雨雪,且沙层内含有一个湿沙层,对白梭梭天然更新十分有利。典型地段调查,更新尚佳,年龄结构表明,这里的白梭梭种群且有发展的趋势。

 
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