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But most natural forests were transformed into the artificial cultivated ecosystem—such as farmland, orchard, tea garden, economic forest, artificial forest, and others-which was result from the managing action by mankind such as disforest and reclamation, building plantation. It presented diversification of forest ecosystem conversion mode.

在历史上,中亚热带山地生态系统的自然植被基本上为天然常绿阔叶林,但由于人类的经营活动(如毁林开辟耕地、营造人工林等),大部(来源:A85BC论文网www.abclunwen.com)分天然林已转变为人工栽培用途的生态系统(如农田、果园、茶园、经济林、人工林等),呈现出多样化的森林生态系统转换模式。

About 150 species: disjunct between Africa, Asia, and Europe; 44 species (28 endemic, one introduced) in China.

大约150种:在非洲,亚洲和欧洲之间间断; 44种(28特有,引进栽培)在中国。

Climatic gradients were based on data sets from 841 meteorological stations throughout China. Definitions for floristic distributional patterns were based upon the work of Prof. Z. Y. Wu. Most of these floristic distributional patterns were strongly correlated with the geographic gradients in climate, except for cosmopolitan, cultivated and invasive genera. Tropical genera form a large fraction of the total genera (ranging from 0.84% to 94.38% in the regional floras) with the highest proportion in southern Yunnan and Hainan Island. Tropical genera occur predominantly in southern China of 0° N latitude and decreased with increasing latitude, as would be expected. Interestingly, the disjunct Tropical Asia and Tropical America distribution were not restricted to southern latitudes. Temperate genera account for 5.1% to 98.83% of the total genera in regional floras with the highest proportion in the province of Xinjiang. Most of these genera followed geographic gradients in climate as expected (temperate genera conspicuously dominate the landscape at higher latitudes), except the East Asian and North American disjunct distribution, Eastern Asian distribution and Chinese endemic distribution. Generally, most plant genera demonstrated some correlation with climatic and geographic gradients. The most important gradients were those of annual air temperature and precipitation. A small fraction did not demonstrate significantly particular pattern:"Cosmopolitan","East Asian and North American disjunct","Eastern Asian" and "Chinese endemic" distributions. The North Temperate distribution had the highest correlation with mean annual air temperature and precipitation.

结果如下:(1)除世界分布、栽培和入侵成分外,大部分中国种子植物属的地理成分的分布与地理相关密切;(2)热带分布属(泛热带分布、热带亚洲至热带美洲间断分布、旧世界热带分布、热带亚洲至热带大洋洲分布、热带亚洲至热带非洲分布及热带亚洲分布合计)占各地方植物区系的0.84%到94.38%,其最低值出现在中国西北部的新疆和青海地区,最高值出现在中国云南南部和海南;(3)热带分布属在<北纬30°的地区占优势,除热带亚洲至热带美洲间断分布外,其它热带成分随纬度增加迅速减少;(4)温带分布属(北温带分布、东亚和北美间断分布、旧世界温带分布、温带亚洲分布、地中海区、西亚到中亚分布、中亚分布和东亚分布合计)占各地方植物区系的5.1%至98.83%,其最高值出现在中国西北部的新疆地区,最低值出现在中国云南南部和海南;(5)除东亚和北美间断分布、东亚分布和中国特有分布外,其它温带成分随纬度增加迅速增加;(6)在温带成分中,东亚和北美间断分布及东亚分布属主要出现在中国亚热带到暖温带地区,北温带分布、旧世界温带分布和温带亚洲分布属在中国北部占优势,而地中海区、西亚到中亚分布和中亚分布属则在中国西北部占优势;(7)除世界分布、东亚和北美间断分布、东亚分布和中国特有分布外,所有其他成分都显示了与气候因素密切相关,其中,北温带分布属与年均温和年降雨量最为密切相关。

This paper discusses the character of ecological conditions and the law of geographical distribution for tea plants in China.

本文讨论了中国栽培茶树的生态条件及地理分布规律。

Emerson's Divinity School address, amid its offenses, reduced Jesus to a sublimely typical man, one who was "true to what is in you and me," alive to the "daily miracle" of "man's life," and manifesting not miracles and an impossible sanctity but "a sweet, natural goodness, a goodness like thine and mine, and that so invites thine and mine to be and to grow."

在它的攻击中,爱默生在神学院的演讲中将耶稣还原为一个象征高尚的人,他"在你我的心里是真实的",对"每日的奇迹"和"人的生命"是敏感的,不但代表着奇迹和难以达到的圣洁,而且代表着"一种美好的、天然的美德,一种你我都有、能引导你我形成和栽培这种美德的美德"。

Twining herb of Old World tropics cultivated in India for food and fodder; sometimes placed in genus Dolichos .

一种缠绕草本植物,产于东半球热带,在印度栽培做饲料,其种子常做食品。

The primary and secondary uses of land, such as forest, agricultural, cultivated, pasture and residential land, etc., which describes the dominant character of a geographic area and thereby establishes the types of activities which are most appropriate and compatible with the potential or designated use of the land

土地的直接与间接用途,例如作为林业,农业,栽培,草场,居民用地等,反映了一个地理区域的主要特征,并因此确定了最适合于潜在或者规定的土地用途的活动类型。

The effects of different concentration of NaCl and Na2SO4 double salt solution stress on the seed germination and seedling ability of salt tolerance of seven oat varieties were studied using the standard block method.

为给燕麦抗盐育种和栽培提供理论依据,用不同梯度的NaCl和Na2SO4复盐溶液胁迫处理7个燕麦品种,研究了盐胁迫对燕麦种子萌发、幼苗生长和叶片质膜透性的影响。

Double-barrelled nitrate selective microelectrodes were used to measure the nitrate activity in leaf cytosol and leaf vacuoles of different rice cultivars in either nitrate supply or deprivation conditions.

随着水稻节水栽培技术的发展与应用,水稻硝酸根离子营养的研究已成为植物营养学和农业生产领域的十分关注的问题之一[1]。

Taking the stem from three varieties of Dracaena fragrans as a material, the effect of the factors such as the plant growth regulators, the different basal culture medium, silver nitrate, and the cultivation medium upon tissue culture regeneration were investigated.

以3个也门铁品种(金心也门铁、金边也门铁和普通也门铁)茎段为材料,研究了植物生长调节物质、基本培养种类、AgNO3、栽培基质等因素对其离体再生的影响。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

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