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林区
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  forest area
    Analysis and evaluation on the fatalness of Lophodermium piceae of water source conservation forest area in both Bailong and Tao River
    白龙江、洮河水源涵养林区云杉落针病危险性分析评估
短句来源
    A PRELIMINARY STUDY ON THE BIONOMICS OF HYLOBIUS ALBOSPARSUS BOHEMAN IN THE DAXING'AN MOUNTAIN FOREST AREA
    大兴安岭林区白毛树皮象生物学特性初步研究
短句来源
    Status and Control of the Harmful Rodents in Hebei Forest Area of Heilongjiang
    黑龙江鹤北林区鼠害现状和综合防治
短句来源
    The Integrated Pest Management of Zoker in Forest Area
    林区鼢鼠的综合管理研究
短句来源
    Occurrence and Distribution Regularity of Rodent Damage in Yichun Forest Area
    伊春林区主要森林鼠害发生与分布规律
短句来源
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  forest
    Study on the Application of Biological Fire-Prevention in South China Forest Areas
    南方林区生物防火的应用研究
短句来源
    RESEARCH ON MONITORING FOREST FIRE IN SOUTH CHINA BY NOAA/AVHRR DATA
    利用NOAA/AVHRR资料监测南方林区森林火灾的研究
短句来源
    Study on the Potential Energy of Forest Fuel in Daxingan Mountain, Heilongjiang Province
    黑龙江大兴安岭林区森林草类可燃物潜在能量研究
短句来源
    Study on the relation between the community structure of rodent and the impaired seedling in forest
    林区啮齿动物群落结构与林木受害关系研究
短句来源
    Analysis and evaluation on the fatalness of Lophodermium piceae of water source conservation forest area in both Bailong and Tao River
    白龙江、洮河水源涵养林区云杉落针病危险性分析评估
短句来源
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  forest district
    RESEARCHES AND ANALYSES ON FOREST FIRE OCCURRENCE IN THE EAST PART OF GREATER XINGAN MTS. FOREST DISTRICT
    大兴安岭东部林区森林火灾发生图的研制与分析
短句来源
    STUDY ON INSECT PEST AND PREVENTION OF FIRE-DAMAGED LOGS IN TAHE FOREST DISTRICT
    塔河林区火烧原木虫害与治理的研究
短句来源
    Insect-eating Birds in the Forest District of Jiangshan City.
    浙江江山市林区食虫鸟类初步调查
短句来源
    STATISTICS AND ANALYSIS TO FIRE SOURCE OF SHENNONGJIA FOREST DISTRICT
    神农架林区森林火灾的火源统计分析
短句来源
    The Characters of The Harmful Biology of Main Forest Industry in Yichun Forest District and The Analysis of the Reasons
    伊春林区主要林业有害生物发生特点及原因分析
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  “林区”译为未确定词的双语例句
    POSSIBILITY OF PINE WILT DISEASE EPIDEMIC IN SOUTH CHINA
    松材线虫萎蔫病在中国南方林区流行的可能性
短句来源
    Research on fire-resistance tree species in south China.
    南方林区防火树种的筛选研究
短句来源
    Using V/U Bifrequency Repeater to Solve Jam Problem of Radio Channel of Incident Command System
    用V/U跨段方式解决寻呼台对林区森林防火通信系统的干扰
短句来源
    The parasitic rate of larvae,pupae and adults is 5.40%,8.46% and 0.33% respectively.
    大兴安岭林区小蠹虫天敌寄生蜂13种,其中茧蜂科4种,广肩小蜂科2种,金小蜂科6种,姬小蜂科1种,寄生率分别为:幼虫期5.40%,蛹期8.46%,成虫期0.33%;
短句来源
    There are 39 species of parasitic wasps in Xiaoxinganling Mountains,9,5,13,4 and 8 species of which belong to Braconidae,Euritomidae,Pteromalidae,Eupelmidae and Eulophidae respectively. The parasitic rate of larvae,pupae and adults is 20.70%,15.82% and 1.71% respectively.
    小兴安岭林区小蠹虫天敌寄生蜂共计39种,其中茧蜂科9种,广肩小蜂科5种,金小蜂科13种,旋小蜂科4种,姬小蜂科8种,寄生率分别为:幼虫期20.70%,蛹期15.82%,成虫期1.71%。
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  forest area
There was a negative correlation between the regenerated forest area and annual flow, and thus, forest regeneration would decrease annual flow.
      
The highest quantitative indices of the testacean complexes were revealed in the forest area soils.
      
We found that the alpine musk deer has strong ecological adaptability; the population development of alpine musk deer may benefit from the reduction of the forest area and even from the fragmentation and isolation of the habitat to a certain extent.
      
Intense and long-lasting ENA events have been studied more or less comprehensively and in full detail for Northern Europe, with 60 to 70% of observations taken in a forest area in the presence of snow cover and 10 to 20% in coastal marine areas.
      
It has the largest area of all planted bamboo-over two-thirds of the total bamboo forest area-and the highest economic value in China.
      
更多          
  forest
Moreover, a backward reasoning forest of a reachable marking was generated for explicitly representing reachable paths in RBS.
      
Growth Model System for National Continuous Forest Inventory
      
A Growth Model System is developed for data updating and forecasting of the national continuous forest inventory.
      
Its design is based on the inherent forest growth laws, and its parameters are estimated by modern regression methods.
      
It is suitable for forest resource information updating and forecasting for a large region, e.g., a province.
      
更多          
  forest district
Annual production of moss layer in dark coniferous forests of Ket-Chulym forest district (by the example of moss Hylocomium sple
      
Hydrogeochemical characteristics of shennongjia forest district at Songbai Town, Hubei
      
In recent years, the calculus disease occurs occasionally in Songbai Town, Hubei Province, which is the capital of the Shennongjia forest district, and shows a trend of more and more frequent occurrence.
      
Thirty Norway spruce trees (Picea abies (L.) Karst.) from the forest district of the ETH Zurich were tested for bending MOR, static MOE of bending and dynamic MOE (calculated from eigenfrequency and sound velocity).
      
Several individuals of the ambrosia beetleGnathotrichus materiarius Fitch were captured by Pheromone traps ofIps cembrae within stands ofLarix kaempferi andPinus sylvestris in the forest district of Lingen (Emsland).
      
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Gravitarmata margarotana Hein. is an important forest insect pest of Shensi. It attacks four species of pine and especially prefers Pinus tabulaeformis which is sometimes severely injured.According to field observation, this insect has one generation a year in North Shensi with pupae hibernating in cocoons. The moths begin to appear in mid-April iind are most abundant in late April and early May. The larvae attack host plants from early May to early June, being most serious in the middle part of May. A number...

Gravitarmata margarotana Hein. is an important forest insect pest of Shensi. It attacks four species of pine and especially prefers Pinus tabulaeformis which is sometimes severely injured.According to field observation, this insect has one generation a year in North Shensi with pupae hibernating in cocoons. The moths begin to appear in mid-April iind are most abundant in late April and early May. The larvae attack host plants from early May to early June, being most serious in the middle part of May. A number of available insecticides were tested against the young larvae. Eesults showed that 25% DDT emulsion and 50% wettable DDT ( : 200-400) are more effective.

油松球果小卷蛾是松类的球果及嫩梢的重要害虫之一。该虫在陕西省乔山、黄龙、秦岭,巴山等林区均有分布,已知寄主植物有油松、马尾松、华山松及白皮松等。其中以油松受害最为严重,被害的当年生球果提早枯落而不能成熟;先年生球果多干缩枯死,无子粒:当年生嫩梢常枯枝秃顶,继而干形弯曲,不能长成通直良材,这样,既严重影响森林更新及造林用种,又严重威胁树木生长发育及木材利用价值。 该虫在陕西省乔山林区年只一代,以蛹越夏过冬。翌年4月中旬为蛾始发期,4月下旬至5月上旬达盛发期。蛾盛飞时刻在傍晚19时30分至20时30分。卵散产,主要产于先年生球果上,间或产于嫩梢及针叶上。卵期14天。幼虫始孵期在5月上旬,中旬达盛孵期,6月上、中旬幼虫始老熟,吐丝下地在枯枝落叶层及杂草丛下结茧化蛹,准备越夏过冬。 该虫发生在海拔1,900米以下的松林内,而在1,900米以上的高寒山地尚未见其踪迹。其发生为害规律是:低海拔重于高海拔,山下部重于山中、上部,纯林重于混交林,疏林重于密林,幼、中龄林重于近、成、过熟林,结实好林分重于结实不好及未结实林分。该虫的发生期是阳坡先于阴坡,低海拔先于高海拔,并与植物物候相关,如幼虫孵化始、...

油松球果小卷蛾是松类的球果及嫩梢的重要害虫之一。该虫在陕西省乔山、黄龙、秦岭,巴山等林区均有分布,已知寄主植物有油松、马尾松、华山松及白皮松等。其中以油松受害最为严重,被害的当年生球果提早枯落而不能成熟;先年生球果多干缩枯死,无子粒:当年生嫩梢常枯枝秃顶,继而干形弯曲,不能长成通直良材,这样,既严重影响森林更新及造林用种,又严重威胁树木生长发育及木材利用价值。 该虫在陕西省乔山林区年只一代,以蛹越夏过冬。翌年4月中旬为蛾始发期,4月下旬至5月上旬达盛发期。蛾盛飞时刻在傍晚19时30分至20时30分。卵散产,主要产于先年生球果上,间或产于嫩梢及针叶上。卵期14天。幼虫始孵期在5月上旬,中旬达盛孵期,6月上、中旬幼虫始老熟,吐丝下地在枯枝落叶层及杂草丛下结茧化蛹,准备越夏过冬。 该虫发生在海拔1,900米以下的松林内,而在1,900米以上的高寒山地尚未见其踪迹。其发生为害规律是:低海拔重于高海拔,山下部重于山中、上部,纯林重于混交林,疏林重于密林,幼、中龄林重于近、成、过熟林,结实好林分重于结实不好及未结实林分。该虫的发生期是阳坡先于阴坡,低海拔先于高海拔,并与植物物候相关,如幼虫孵化始、盛期,正是油松开花始、盛期,也是进行化学防治的大好时机。 防治措施:营造混交林;改疏

Dahurian larches[Large gimelini] were important timber trees, growing very commonly in our Northeastern forest. Since 1976, larch cankers have been observed on dahurian larches. The pathogenic fungi are Trichoscyphella willkommii[Hart.] Nannf. They may occur as a serious disease on twigs and stems of the plantatio ns, the natural regenerating young crops and the natural overmatured stock trees, but the natural regenerated young crops had the highest percentages of pathogenic fungi attacks. The lowest percentages...

Dahurian larches[Large gimelini] were important timber trees, growing very commonly in our Northeastern forest. Since 1976, larch cankers have been observed on dahurian larches. The pathogenic fungi are Trichoscyphella willkommii[Hart.] Nannf. They may occur as a serious disease on twigs and stems of the plantatio ns, the natural regenerating young crops and the natural overmatured stock trees, but the natural regenerated young crops had the highest percentages of pathogenic fungi attacks. The lowest percentages of pathogenic fungi attacks were 21%, the highest-97%, as a general, the percentages of pathogenic fungi attacks were 50%, the twigs attacked by this disease could produce the fusiform cankers, the stems could produce a variety of forms of cankers and occur the symptoms of resin flows. On the surfaces of cankers persisted concentric protuberances of cankers traumata. If trees attacked from year to year,the trees were hard to recover from this disease. On the margins of cankers traumata produced some discoid fructifications, which were white outside and orange-yellow inside,diseased trees of natural stands were the source of infection of plantations, seriously attacked, frostbite and sun burn caused by tremendous temperature difference were the essential infective matter. Buds, twigs and barks died back from freeze injury were essential infection gate of pathogenic fungi. Precautionary measures were proposed that:we had to reconnoiter the state of disease development, carry out quarantine in the cultivated regions, improve tbe stands conditions, reforest mixed crops, don't reforest in the low-lying lands and in the cutting-blank of larch, adsivably increase the primary density of plantations, in order to escape from frostbite, at formation period, make intermediate cutting in time, carefully make prunning reduce infection gate and chance invaded by pathogenic fungi.

兴安落叶松[Larix gmslini]是我国东北林区分布广泛的重要用材树种。自1976年发现了癌肿病。病原菌是韦氏毛杯菌[Trichoscpphella willommii(Hart.)Nannf.]。病害发生在人工林、天然更新幼林和过熟的天然母树上的枝与干上,显然幼令林的发病率最高。发病率最低为21%,最高为97%,一般为50%。枝病后发生棱形癌肿,干病后发生各种形状的癌肿和流脂病状,癌肿表面有同心环状的突起溃疡伤。一旦发病年年发展,极难恢复。在溃疡伤的边缘产生盘状子实体,外白内橙黄。天然林中的病树,是人工林大面积发病的侵染来源。霜冻与温差大所造成的日灼伤,是发病的重要诱因,被冻死的芽和小枝以及皮部,是病菌的最有可能的主要侵染途径。建议防治措施应包括:普查病情、域内检疫,提高林分卫生标准、造混交林、不在低洼地和落叶松迹地上造林、适当加大初植密度以防冻害、成林后适时间伐、精心修枝,以减少侵染来源和病菌的侵染机会。

Fir and spruce aphid (A. pectinatae Chol.), which injures leaves of young fir tree (Abies nephrolopis Maximowicz) and forms galls on young spruce tree (Picoa koraiensis NaKai and Picea jezoensis Cartiere), is a newly-found pest on Cutting-blanks in Lesser Xingcm Mts; It is a dominant and one of the major pest of young fir and spruce trees in this district.

冷杉球蚜是小兴安岭林区釆伐迹地上新发现的一种害虫。本文报导了冷衫球蚜的为害情况、生活习性及综合防治措施等。

 
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