查询词典 silvicultural

The main mission of large scale forest production from plantations has been fundamentally and thoroughly changed to a silvicultural mission based on a recent analysis of its resource characteristics and the need for green space.

到20 世纪末，北京市规划宜林荒山基本实现绿化，林业生产的主要任务已由大规模植树造林转变为森林资源经营管理，森林培育的任务已发生根本性转变。

The seedlings growth in containers with different combination of materials, size, and medium compound were monitored for three successive years after transplanted on the silvicultural site in order to observe the continuous effects of different treatments and superior traits.

对不同容器材料、尺寸和基质配比下的容器苗作造林后连续3年跟踪调查，以期从一段时间内考察它们在出圃造林后各处理组合及优良性状的持续效应。

In silvicultural regeneration treatment,the diversity of shrubs and herbages increases gradually in stage A1～A3,and the variation will continue after stage A3,further work is needed to examine the dynamic.

群落多样性是指生物群落在组成、结构、功能和动态等方面的多样化，是生物多样性各个层次中研究得最早的一个层次，其研究内容主要侧重于群落的物种组成和结构的多样性[1]。

Through 7 years study, the variation regulation and model of white poplar were known well, and 3 best seed sources and30 best clones were screened, making the genetic gain more than 22~28 percent, The results presented here provide a scientific foundation for silvicultural division.

经过7年的研究，摸清了毛白杨的变异规律及模式，筛选出3个种源，30个优良无性系，遗传增益达22%~28%，为造林区划提供了科学依据。

Themain results are as follows:(1)The utilization-oriented silvicultureshould be regarded as a silvicultural regime or system,that can bestsatisfy the special economic,social or ecological demand for a given regionwith lowest cost and fast speed,using specifically oriented,systematic andadvanced technical measures on the basis of characteristics of tree species,natural and economic conditions and local technical and development levels.

主要研究结果如下：(1)定向培育应该做为一种森林培育制度来对待，即定向培育是根据经济、社会和生态上的特定要求，确定相应的培育目标，然后根据造林地区和造林地的条件，造林树种或树种组合的特性，以及当地经济和技术水平，采用相应专向，系统、先进、配套的培育技术体系，以可能的最低成本和最快速度，达到定向要求的一种森林培育制度。

Keywords: Pinus Densiflora Plantation,Silvicultural Measures,Wood Properties,Early Prediction

中文关键词：人工林赤松；培育措施；木材品质；早期预测

By quantitative analysis of partial correlation coefficients of the regression models, the key silvicultural techniques of growing Masson pine plantation can be scientifically determined as site control, inheritance control and density control.

通过对回归模型偏相关系数的定量分析，可以确定马尾松人工林培育的关键技术措施是立地控制、遗传控制和密度控制；同时，还可根据各项造林技术措施和林分年龄，预测马尾松林分的生长。

Bamboo pest ; IPM ; silvicultural ; natural enemy ; spatial distribution

竹类害虫；综合防治；营林技术；天敌；空间分布

Based on the yearly investigation to permanent plots of the 4 10 years old stands, the mean height and DBH of the stands were made as benchmark variables, and main silvicultural techniques and ages of the stands were made as explanatory variables, quantitative regression models of predicting growth of Masson pine plantation were established.

该文利用贵州省台江县马尾松造林技术试验林4～10年生林分的逐年测定资料，以林分平均树高和平均胸径为基准变量、各主要造林技术措施和林分年龄为说明变量，对建立马尾松林分生长的数量化回归模型进行初步研究。

We refer the knowledge of the construction of artificial multi-storied forest by 6W1M, furthermore, redraw up a new operating process documents of the construction of artificial multi-storied forest so as to replace experience rule by science. This approach wishes to provide systematic training on silvicultural workers and support the reference of multi-storied forest programming and decision in different districts.

研究结果以6W1M方式将营造复层林营造知识予以汇总，并重新拟订复层林营造作业流程，以科学的方法来取代旧有的经验法则，期能有系统的培训林业从事人员，并提供各林区未来复层林作业规划与决策之参考。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。