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1)  forest category
林种
1.
Analyzing the forest farmers behavioral characteristic managing the different forest category behind the new round of collective forest property rights institution reform,we arrive at a conclusion that the objective expectancy and reformation result is not the same.
分析了新一轮集体林产权制度改革后林农经营不同林种的行为特征,得到集体林产权制度改革预期目标与改革结果不相一致的结论。
2.
Investigation and analysis of forest category and tree species composition reveals that the main problem is economic forest area is too small,generating less economic benefits gained by farmers who have participated in the project,and that species selection was narrowed to single species which led to larger area of pure forest.
林种结构和树种组成是退耕还林工程的关键问题之一,本文分析了延安市退耕还林工程实施以来造林林种和树种组成,指出其存在林种选择上经济林面积过小,使退耕农户从退耕地中收益减少;树种单一,纯林面积过大等问题。
3.
Based on the conception of Optimal cover rate of forest (OCRF), the view that forest category should be a basic unit for evaluating the amount of OCRF is put forward.
按照最佳森林覆盖率的定义,提出了最佳森林覆盖率的确定应以林种为基本单元即分林种确定以满足人们对森林的各种需求所需森林面积;介绍了确定最佳森林覆盖率的指标体系和各林种所需面积的计算公式;提出了各林种所需面积合并的技术关键为“功能换算系数”,定义功能换算系数为相同面积的一林种在功能上相当于另一林种的程度,用十分制或百分制表示。
2)  forest species
林种
1.
The results showed that the order of carbon fixation for different forest species of highwood was:timber forests﹥fuelwood forests﹥special use forests﹥protective forests;the order of carbon fixation for different developmental stages of highwood was:young forests﹥middle age forests﹥near mature forests﹥mature forests﹥over mature forests;the order of carbon f.
结果表明,不同林种乔木固碳能力依次为:用材林(薪炭林(特种用途林(防护林;不同发育阶段乔木林固碳能力依次为:幼龄林(中龄林(近成熟林(成熟林(过成熟林;不同优势树种组乔木林固碳能力依次为:针叶林(阔叶林(针阔混交林;不同优势树种乔木林固碳能力依次是:杉木林(马尾松林(杨树林;同时,得出相同龄组但不同优势树种或相同优势树种但不同龄组的乔木林固碳能力也不同,其中杉木的幼龄林固碳能力最大,达到19。
2.
The reasons for irrational & ununified criteria for both charging and forest species differentiation in the course of charging for forest vegetation restoration cost, lead to the problems about artificial alterations of land classification and forest species before the expropriation & occupation of forestland.
在实施征收森林植被恢复费过程中,由于收费标准不合理、林种划分标准不统一等原因,导致征收工作中出现征占用林地之前人为改变地类、更改林种等问题,为此,提出调整收费标准、进行技术处理和行政干预等合理化建议。
3)  forest type
林种
1.
The five types in sample land are as follows: return economic forest for keeping soil type, return forest for keeping soil type, mixed block return forest type, return forest in the top of mountain type and return forest in forbidden cutting type.
在永顺县勺哈乡退耕还林试验示范区进行立地类型划分与评价的基础上,在各立地类型区根据各自不同的特点进行了模式和林种树种配置。
2.
The optimized model for the ecoecological shelterbelt system in Yanchi was established and the optimal pattern of forest type,tree species in the sandy area of Yanchi county was put forward.
运用层次分析方法对盐池沙区林业建设的现状进行了分析,建立了盐池县生态经济型防护林体系的优化模型,提出了盐池县风沙区生态经济型防护林体系林种、树种的最优比例。
3.
Study and analysis on forest resources dynamics and development tendency in Zhejiang,investigation, evaluation and plan on current situation of forest type and tree species,especially on famous.
通过浙江省森林资源动态与发展趋势的研究分析,进行了全省林种、树种结构分布现状调查、评价及规划,特别是对浙江省名特优经济林生产现状进行了调查、评价,完成了全省林种结构的合理调整与配置,并对今后发展目标进行规划。
4)  species of crop and tree
林种树种
5)  Landscape tree
园林树种
1.
This paper was based on the investigation of landscape trees in various green land to carry out the directories of landscape trees, common and potential use species and native species in Taiyuan city, and analyzed their growth and ornamental characteristics and use in landscape, and concluded the blooming time of main trees for flower view.
采用实地调查与分析相结合的方法,对太原市不同绿地类型的园林树种及其应用情况进行了调查,在整理出太原市园林绿化树种、常用及应用前景较好树种及乡土树种名录的基础上,对其生长习性、观赏特性和园林用途进行了分析;观察总结了主要观花树种的初花期。
6)  afforestation species
造林树种
1.
Through study of re-reclamation afforestation on mining district of Daye iron mine in Huangshi city, the authors found that the afforestation species suitable to re-reclamation of mining district are Vetch leaf Spphora, Hankow Willow, Chinese Arborvitae and Fortune Firethorn with additional of such auxiliary measures as pulling trough and digging pit and adding filler etc.
通过对黄石大冶铁矿矿区复垦造林研究 ,筛选出适宜矿区复垦造林树种为刺槐、旱柳、侧柏与火棘。
2.
To meet the needs of afforestation in particular natural conditions in Yuanmou dry and hot valley, the quantitative selection research of drought resistant and heat resistant afforestation species was carried out.
针对元谋干热河谷区特殊的自然条件,为荒山造林所需,开展抗旱耐热造林树种的定量选择研究。
补充资料:采收林木种子要有选择性
    林木种子是造林、绿化、美化的物质保障,树种、品种的选择和采种品质的好坏,直接影响苗木质量和林业生态环境的建设。在秋冬闲季,利用农村、城镇剩余劳动力,采集林木种子,无须投入太多资金,就可获得较大经济收入。但是,林木种子不能随意采摘,见种就采,而要有选择地及时采集。
    一、根据市场需求,选择有发展前景的城镇绿化树种采集。
    由于全国退耕还林计划缩减和国家基本农田不允许栽树的有关规定,当前山区和平原绿化造林的苗木基本供应充足,侧柏、黑松、刺槐、国槐、白蜡、紫穗槐等树种的种子用量有限,不可盲目地大量采收,否则很容易造成积压或滞销。相反,随着城市化进程的不断加速,城镇绿化、美化需要大量的林木、花木种苗,应选择适合城镇绿化、美化的树种采种,如栾树、百日红、合欢、玉兰、木槿、紫荆以及嫁接蔷薇科花木的毛桃、杏、海棠、木瓜等砧木的种子。
    二、要选择优良母株采种。
    由于林业生产周期较长,林木种子品质优劣对林业的影响不是几年,而是几十年、上百年。因此,母株应选择生长健壮、株形丰满、无病虫害、具有优良性状的壮年树。这样采集的种子,充实饱满、品质纯正、发芽率高、出苗整齐、幼苗健壮。那些生长环境不良、长势差的“小老头树”,尽管硕果累累,但种子质量特别是遗传品质很差,不要在这些母株上采种。
    三、要在果实成熟期采收。
    不同树种果实成熟期不同,如白榆种子春天成熟;杏、黄栌种子夏初成熟;五角枫种子秋天成熟;南天竹种子冬天成熟。就是相同树种,生长在不同地理位置的母株,果实成熟期也不尽相同,如黑松、麻栎种子沿海地区比内陆地区普遍晚熟20余天。早了,种子未成熟,发芽能力弱;晚了,种子会因脱落失散或被鸟类、害虫吃掉而采不到。一般种子成熟的特征为果实呈黄褐色、干裂或果肉软化。
    四、要选择观赏价值高的珍稀树种采种。
    普通树种随处可见,种子很容易采到,价格也不高,甚至不好销售。物以稀为贵,珍稀树种特别是
    具有较高观赏价值的树种,大多分布在山区森林深处或栽培在植物园内,如七叶树、小叶朴、鸡爪槭、海州常山、流苏、石楠、平枝栒子、凌宵等。这些树种,果实成熟期未必一致,生长环境或地理位置也比较特殊,采种往往比较困难,有时需要借助一定的外界条件及时采收才行。(源自《中国花卉报》2004.09.28)
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
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