树种

Furthermore, the ability of betulinic acid to induce apoptosis in melanoma and other cell types and the favoral therapeutic index suggests that betulinic acid is an attractive and promising antitumor agent.

虽然白桦酯酸存在于很多植物种类中，但其普遍含量很低，由于其巨大的研究价值，仅靠植物提取已经不能满足越来越多的研究需求，与白桦酯酸结构很相近的化合物白桦酯醇，在白桦树皮中含量高于10%，而白桦又是北半球数量丰富的树种。

Natural distribution, site condition and bioecological characteristics of some local tree species have been studied in this paper.

对臭椿、酸枣、荆条、山桃、毛樱桃、黄刺玫、柄扁桃、细叶小檗等乡土树种的自然分布、立地条件和生物学生态学特性作了研究，并收集播种材料进行育苗试验。

It is mainly distributed in Hebei, Liaoning and Inner Mongolia, as one of the dominant species of breakwind.

主要分布于河北、辽宁及内蒙古等地，作为防风固沙的优势树种。

Broussonetia papyrifera is the best species for the revegetaion in mine spoil in Mufu mountain of Nanjing.

因此，在人工恢复这一地区矿区废弃地植被时，可以选用这些树种。

Basing on the investigation on 5 plots of Broussonetia papyrifera population and main associated species naturally revegetabled in mine spoil Nanjing Mufu Mountains, the niche breath and niche overlap of the main species were studied.

中文摘要：以南京幕府山矿区废弃地自然恢复的植被优势种群为对象，对构树及其伴生树种的生态位宽度和生态位重叠进行了研究。

The comprehensive value of the planted seedlings under forest in the designed scheme in Beijing were assessed by applying VE and VA methods. It was indicated that the value of the seedlings under ecological forests followed the order of Quercus variabilis, Broussonetia kazinoki, Cotinus coggygria, Acer truncatum etc. It was concluded that in the forestry management, comprehensive values should be considered to select seedling species with high values for regeneration under forests.

评价结果认为，在以生态公益林定位的森林经营中，人工林下更新幼苗的综合价值依次是栓皮栎、构树、黄栌、华北五角枫等，所以在林下层苗木的经营选择中应该按照这些树种的综合价值来进行苗木的选择和操作。

Xeuramericana cv.'Zhonglin46', Salix matsudana and Broussonetia papyrtfera, and analysis the bark inclusion of these 4 tree species.

结果表明，取食不同树种的桑天牛成虫在取食量、存活时间、产卵量和死亡雌虫体内遗卵量上有较大差异。

The comprehensive value of the planted seedlings under forest in the designed scheme in Beijing were assessed by applying VE and VA methods. It was indicated that the value of the seedlings under ecological forests followed the order of Quercus variabilis, Broussonetia kazinoki, Cotinus coggygria, Acer truncaturn etc. It was concluded that in the forestry management, comprehensive values should be considered to select seedling species with high values for regeneration under forests.

评价结果认为，在以生态公益林定位的森林经营中，人工林下更新幼苗的综合价值依次是栓皮栎、构树、黄栌、华北五角枫等，所以在林下层苗木的经营选择中应该按照这些树种的综合价值来进行苗木的选择和操作。

Take three kinds of tree in Karst area and non-Karst area (Castanea mollissima, Ginkgo biloba, Prunuspersica) for study objects.

本文以桂林毛村两个区域上的三种经济树种：板栗、银杏、桃树及其根附近的土壤为研究对象，研究土壤溶解有机碳的季节动态及其对三种果树的相互影响。

Casuarina equisetifolia is a useful evergreen and fast-growing tree growing in loose sandy soil in tropical and subtropical zones.

木麻黄是热带、亚热带常绿乔木，天然生长于滨海疏松沙土中，为多用途速生树种。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。