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针叶木

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Among the species we measured, the maximum water holding specie is Abelia chinensis, and the minimum is Cudrania tricuspidata, and the water holding capacity of Abelia chinensis is three times as Cudrania tricuspidata. The shrub and herbage amount of six forest types is Shrubbery and grass land, Pinus massoniana forest, Mixed conifer forest, Conifer and broadleaf forest, Broadleaf forest and Cupressus funebris forest in order. And the water holding amount of shrub and herbage have positive relative with their amounts.

6种森林类型林下凋落物存储量从大到小依次是柏木林、针阔混交林、阔叶林、针叶混交林、灌草地和马尾松林;各种森林类型的凋落物都以半分解层为主,凋落物的组成以叶子为主枝条为辅,并杂有一些果实、树皮及芽鳞等;凋落物持水量从大到小依次是阔叶林、柏木林、针阔混交林、针叶混交林、灌木林和马尾松林,主要原因是除了受凋落物数量的影响外,还受凋落物成分的影响。

The terrain is dominated by taiga—dense forest of spindly birch, cedar, and pine—and boloto, peaty marsh that is frozen for most of the year and in spots bubbles with methane.

这个地区主要是由茂密的西伯利亚针叶林带和泥炭沼泽构成;针叶林带的树木以细长的桦木、雪松与松树为主,泥炭沼泽一年大多呈冰封状态,有些地点还会冒出甲烷。

North America, Europe and Russia have most (85%) of the available softwood stock, while the

北美、欧洲和俄罗斯有占世界资源总量85%的针叶木,而阔叶木集中于拉丁美洲、非洲和东南亚。

The influence of PFI beating on fibre and handsheet properties of hardwood and softwood kraft pulps was investigated.

研究了针叶木和阔叶木硫酸盐浆PFI打浆对各自纤维性质及浆张性能的影响。

Have to Masson pine, fir, cedar mainly subtropical coniferous forests, and chestnut in silk, camphora, nanmu, eucalyptus, tangelo mainly evergreen broad-leaved forest, there are birch, poplar, Quercus acutissima, serrata tree mainly deciduous broad-leaved forest, there are a camellia, rhododendron, Eurya, mainly cubeba mountain shrub, and to Imperata, mainly of Pakistani mountain fescue grass.

有以马尾松、杉木、柏木为主的亚热带针叶林,有以丝栗、香樟、楠木、桉树、桔柚为主的常绿阔叶林,有以桦木、杨树、麻栎、枹树为主的落叶阔叶林,有以山茶、杜鹃花、柃木、山苍子为主的山地灌丛,有以白茅、巴茅为主的山地草丛。

The canopy interception will increase with the precipitation during at the beginning of rain, but it will keep stable later. The canopy interception quantity of six forest types is Mixed conifer forest, Pinus massoniana forest, Cupressus funebris forest, Conifer and broadleaf forest, Broadleaf forest and Shrubbery and grass land in order.There is much difference among the different species of the shrub and herbage.

林下灌草层不同的物种最大持水量有很大区别,在测定的物种中持水量最大的是糯米条,持水量最小的是柞木,糯米条的持水量接近柞木的3倍。6种森林类型林下灌草生物量从大到小依次是灌草地、马尾松林、针叶混交林、针阔混交林、阔叶林和柏木林;灌草层的持水量与其生物量具有密切关系,生物量多的持水量相应也多。

Semibleached alkaline sulfite-anthraquinone larch pulpis used as a substitute for the mixed long fiber pulp of NBKP and NBSP in newsprint furnish.

研究了以半漂落叶松碱性亚硫酸盐-蒽醌法浆代替针叶木漂白硫酸盐浆与白松酸性亚硫酸盐浆的混合长纤维浆料配抄新闻纸的情况。

The residual lignins extracted from both the original and oxygen-delignified softwood kraft pulp and those isolated from the effluent of oxygen delignification were subjected to pyrolysis in the presence of tetramethylammonium hydroxide.

针叶木硫酸盐原浆、氧漂浆以及氧漂后的废液中分离出残余木素,在四甲基氢氧化铵存在下,采用裂解气相色谱-质谱联用的方法研究了氧漂过程中木素分子结构的变化。

Based on beam-bending theory and digital image processing technique, the flexibility index of pulp fibers which was calculated with the unbonded span distance, fiber coarseness and the diameter of the metallic wire was easily obtained with the aid of charge coupled device camera, frame grabber, image processing software and computer.

摘 要:根据梁弯曲理论建立蹬纤维柔软度测量模型研制出了纤维柔软度的测量系统,对实验样本数进行了测量确定,并以此系统对针叶木、阔叶木和竹子等纸浆纤维进行了柔软度测量。

It is shown that it is difficulty to differentiate each vegetation type among sub-tropical evergreen forest, sub-tropical coniferous forest and sub-tropical deciduous forest because of the mixture of their tree spectra. According to the reflection index in the wavelengths of 750 nm to 1 100 nm, the tree species can be divided into 4 groups with descend in reflectivity. Each tree specie can be differentiated from each other according to its slope of the spectrum curve and its reflection index in the wavelengths of 770 nm to 1 010 nm for each forest vegetation type. The unique first order derivative feature can be used to identify litsea, alder, fir, red birch, southwest birch, large schima confertiflora, taiwania flousian and small leaf schima confertiflora.

研究表明:亚热带常绿阔叶林、亚热带针叶林和亚热带落叶阔叶林等植被类型,因其树种间光谱特征混淆严重,而难以彼此区分;根据其反射率在750~1 100 nm范围上的差异,可将其归为4类;就各植被类型而言,其树种间在光谱曲线坡度,以及在770~1 010 nm范围上具有显著差异,可据此将其区分;木姜子、桤木、杉木、红桦、大叶木荷、秃杉和小叶木荷等因具有独特的光谱一阶导数特征,据此可以识别提取。

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