clear cutting的例句大全

Study was made on the content of Sulphur in permafrost and the influencing factors of the Sulphur contents in three ecosystems which were virgin forest, clear cutting forest, original wetland in typical temperate Larix gmelinii forest region in China.

通过对我国典型寒温带兴安落叶松林区的原始林、间伐林、原始湿地3种生态系统冻土中硫含量以及影响硫含量因素的研究。

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PH of mixed coniferous and broadleaf stand, the artifical dahurian larch forest and clear cutting forest land are higher than that the select cutting forest land and the reserved zone;

pH：针阔混交林、落叶松人工林皆伐林地比择伐林地及保留带高，水解酸低，阔叶混交林则相反；

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Some of them show clear cutting relationship and genetic linkage. The Dongshan Complex, with a long history of geological evolution, provides a typical example for the study of the Anshan early Archaean crustal evolution.

部分类型岩石之间存在清楚的切割关系，在组成上具有成因联系，表明了该杂岩长期的地质演化历史，为鞍山地区太古宙早期地壳演化提供了一个典型实例。

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The experience and lesson of forest management in Heilongjiang province since 1949 were summarized, and the main lessons are as follows: ( 1) over cutting and regeneration lag cutting, big area clear cutting and high strength selective logging;

系统总结了建国以来黑龙江森林经营管理的经验和教训。指出应该吸取的主要教训是：①大砍大造，更新跟不上采伐，大面积的皆伐和大强度的择伐；

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Loss of water and erosion of soil in the clear cutting land were very serious, even if the native tree species from original forest were adopted for afforestation in such area, they were unable to grow well in such a changed environment.

皆伐迹地水土流失严重，即使采用附近原始林的树种造林，因环境改变生长不良。

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Its field trial showed that the free grain loss is reduced and specially invented windrowing device closely behind the stripping rotor located justified itself by the clear cutting with shorter stubble and being center delivered windrow of the straw.

田间试验表明落粒损失减少，作者发明的设置于摘脱流通筒后面的切割搂集装置工作性能良好：割茬低条铺放在两履带之间。

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The order of the content of Se frow high to low is the virgin wetland, the virgin forest and the clear cutting forest. And the influence of the position of slope and the direction of slope on Se content is not notable.

3种生态系统硒元素含量由高到低的顺序为原始湿地、原始林、皆伐林，坡向和坡位对硒元素含量影响不显著。

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Based on socioeconomic data and field investigation, this change was mainly induced by the clear cutting of coniferous, broad leaved forests and sandy-shrub vegetation, saline-shrub vegetation. Thus, human activities had significant influences on these two types of vegetation.

根据社会经济发展和调研结果，上述变化与当地农业生产活动对针叶、阔叶林带和沙地盐地灌丛带土地的开垦密切相关，即人类活动对这两种类型植被的影响相对较大。

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The decrease of draining ditches area may also cause methane emission rates decreasing in the plantations. ( 8) Three forested swamps after selective and clear cutting uptakes less methane than the natural ones, or changed to the atmospheric methane sinks.

排水沟相对面积减少也会导致人工林甲烷排放速率降低。（8）择伐和皆伐都导致3个类型的森林沼泽作为大气甲烷汇的功能降低，或者由大气甲烷的汇转变为甲烷的源。

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In clear cutting forest, the dominant species was Gansu zokor.

次生林全面清坡造林幼林地，其群落优势种为甘肃鼢鼠。

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The choice of technological types of aerial cableway skidding for the small area clear cutting

小面积皆伐集材索道工艺类型的选择小小面包圈：连战皆捷

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Mass fraction of the quick potassium of clear cutting area are higher than that of selected cutting areas and the reserved zone;

速效钾质量分数：皆伐林地高于择伐林地及保留带；

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Clear cutting shall be put under strict controls and the reforestation shall be completed in the same or next year of the cutting;

皆伐应当严格控制，并在采伐的当年或者次年内完成更新造林；

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Field test of bulldozer operating process SKIDDING EXPERIMENT EXCEPT CLEAR CUTTING JOBS

推土机作业过程的现场试验

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His paper studies the migration of nutrient element resources of the forest land after clear cutting and prescribed burning.

本文研究了林地皆伐火烧后生物量和养分元素资源迁移状况。

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SKIDDING EXPERIMENT EXCEPT CLEAR CUTTING JOBS Equidistant Setting Out of Easement Curve in Railway Construction

非皆伐作业集材试验铁路缓和曲线的等间隔放样方法

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The litter thickness of select cutting areas and reserved zone are higher than that of clear cutting areas.

枯落层厚度：保留带、择伐林地高于皆伐林地。

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And the effect of mixed mode was the most significant, followed by clear cutting sprouting and reforestation.

其中以混交方式的作用最为明显，其次为皆伐萌生，重新造林效果最差。

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Change of Vegetation Species of Artificial Mixed Forests of Chinese fir and Broad-leaf Trees Before and After Clear Cutting

杉阔混交人工林皆伐前后植物种类组成变化

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The result of establishing a semi-artificial grassland after shrubs were clear cutting is researched in this paper.

本文研究了乌鲁木齐南山种羊场春秋放牧场灌木砍伐后，建立半人工草地的效果。

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