查询词典 sapling forest

Prattii- Ailanthus altissima deciduous broad-leaved forest community and Cerasus trichostorna-Cerasus dielsiana-Acer caudatum deciduous broadleaved forest community , had lower total richness and Shannon-Wiener index .

3人工林群落与次生林群落相比，人工林群落具有较低的物种丰富度指数和Shannon-Wiener多样性指数以及较高的优势度指数，次生林具有较高的物种丰富度指数和Shannon-Wiener多样性指数以及较低的优势度指数。

The colonized time of Ol. Opisthopora and Coleoptera were 8.42 and 6.45 months at mixed forest respectively, while Hymenoptera and Collembola were 9.48 and 7.91 months respectively at Chinese fir forest.

后孔寡毛目在杉木混交林凋落物中集聚的时间最长，鞘翅目集聚的时间最短，分别为8.42和6.45个月；膜翅目在杉木纯林凋落物中集聚的时间最长，弹尾目集聚的时间最短，分别为9.90和7.91个月。

The content of NH3-N of Coniferous mixed forest is higher than rainfall and other forest. The content of NH3-N of Corylus cornuta marsh is lowest. The purgative effect of NH3-N of Larix gmelinii plantation is better too.

樟落混交林的氨氮含量明显高于大气降水和其它林分类型，榛子灌丛的氨氮含量最低，落叶松人工林对氨氮的净化效果也很好。

This paper probed into existing problems of forest price based on collecting a vast mount of input and output data on Cunninghamia lanceolata and Pinus massoniana,and calculating their forest prices of growing stock and log per unit each species.

收集大量杉木、马尾松的投入和产出资料，测算杉木、马尾松单位活立木蓄积的林价与木材的林价，在此基础上，探讨了林价存在的问题，提出了完善林价体制的几点建议。

Patch characteristics indicated that the degree of fragmentation for the natural broadleaf forest was lower than for artificial landscapes of Phyllostachys pubescens, Cunninghamia lanceolata, and Camellia sinensis. Therefore, to maintain sustainable development in the region, and especially to enhance protection for the broadleaf forest matrix, intense human activity and tourism should be reduced.

景观要素的斑块特征表明，在目前干扰强度下，阔叶林景观的连通性尚好，破碎化程度低；毛竹纯林、杉木纯林和茶园等人工或半人工经营景观的破碎化程度高，建议应该减少强烈的人类经营活动和旅游，特别要加强对阔叶林基质的保护，实现区域可持续发展。

Smoldering combustion is a unique combustion phenomenon; its spread may cause disasters and damage a forest. In order to determine smoldering combustion characteristics so as to provide a theoretical basis for preventing and controlling forest fire, the paper made some combustion experiments on litters from Keteleeria evelyniana, Cupressus torulosa and Acacia mearnsii with a fuel bed designed by the authors.

为进一步了解森林凋落物的阴燃特性，为科学地防控森林火灾提供理论依据，用自行设计的燃烧试验床对云南油杉Keteleeria evelyniana、藏柏Cupressus torulosa、黑荆Acacia mearnsii这3种年凋落物积累量大的树木的凋落物进行了阴燃试验，对阴燃过程中的温度变化数据进行了实时采集。

Species of Eucalyptus globulus, Quercus acutissima, Cupressus torulosa, Prunu conradinae, Acacia dealbata and Albizia mollis applied for mixed forest, the experiment on 8 artificial mixed forest models was carried out in Daliyuan of Yuxi.

用蓝桉、麻栎、藏柏、山樱桃、圣诞树、山合欢等作混交树种，在玉溪大栗园开展了 8种人工混交林混交模型的试验研究，依据Ii=P1h/H +P2 d/D +P3v/V计算混交模型的选择指标，用I标=I平均+aδn 计算出混交模型的选择标准为

The results showed that the lowland rain forest are composed of Heritiera parvfolia, Ormosia balansae, Ficus altissima, Vatica mangachapoi, Sarcosperma kachinense, Man glietia hainanense, Ixonanthes chinensis and Diospyros hainanensis in arbor layer and Gironniera subaequalis, Koilodepas hainanense, Blastus cochinchinensis, Psychotria rubra in shrub layer. The dominant species in mountain rain forest are Dacrydium pierrei, Podocarpus imbricatus, Xanthophyllum hainanense, Altingia obovata, Quercus auguslii and Adinandra hainanensis.

研究结果表明吊罗山低地雨林乔木层以蝴蝶树、青梅、高山榕、粘木、长脐红豆、海南柿、肉实树和海南木莲为主，灌木层以白颜树、白茶、柏拉木和九节为主；山地雨林以陆均松、鸡毛松、黄叶树、阿丁枫、扫把青冈和海南杨桐为优势种；山顶常绿矮林则以山地常绿阔叶林陆均松、琼崖柯、岭南青冈和油丹等种类的矮化为特征。

The result shows that the Giant Panda habitat in Gansu is an under-plant population of forest communities with Fargesia denudate as the dominant species; that Giant Panda make movements at the altitudes ranging from 1 600 m to 2 000 m in Wenxian County and Diebu County; that the characteristics of bamboo population, geographical environment, along with the integrity of forest communities, are taken as the three dominant factors in influencing the life of Giant Panda;and that the features of the habitat are basically stable but reasonable distribution together with strong artificial disturbance is considered as the potential factor resulting in the habitat unstable.

结果表明：甘肃省大熊猫主要栖息在以缺苞箭竹为优势的下木种群森林群落中，其垂直活动范围主要集中在海拔1 600～2 800 m处，水平分布在文县和迭部一带；竹类种群的特性、地理环境和森林群落的完整性是大熊猫栖息生存的3个主要综合要素；甘肃省大熊猫的生境特征基本稳定，但该区竹类种群的正态性分布和人为干扰强度是构成其生境不稳定的重要潜在因素。

The percentages of dioecy varied among the six selected vegetation types in Taiwan, from 14.1% in the Linkou Laterite Terrace secondary forest to 23.9% in the Nanjenshan plot, the highest percentage ever found in a forest plot.

另外本研究在检视了六个森林样区中之所有原生被子植物资料，发现其中雌雄异株植物的比例有相当的变异，从林口红土台地次生林的14.1%，到南仁山热带森林的23.9%不等，后者甚至为目前所有发表样区资料中雌雄异株比例最高的地区。

The statistical analysis of this large set of mutations has led us to propose a diagnostic strategy that should help with the molecular work-up of optic neuropathies.

这一大系列基因突变的统计学分析引导我们提出一个诊断策略，可以帮助我们对视神经病变进行分子学的诊断检查。

The results show that the pipe grouting changes the mechanical parameters of surrounding rocks to achieve the security of engineering objectives by reinforcing surrounding rocks and bolcking the water.

研究表明：小导管注浆一方面改变了围岩的力学参数，另一方面利用浆液的固结特性可以实现堵水和加固围岩的工程目标，使隧道在开挖过程中的安全得到保障。