造林

Check, acceptance and allocation of cutting area regarding the forest harv esting operations

育林费，确保更新造林的质量。森林采伐作业则按&国有林区伐区质量作业检查标准&

Based on the limit equilibrium theory, the paper tries to establish an analytical model to assess shallow planar landslide of the forested soil side slope, taking into account of the positive effects of mechanically reinforcing soil and hydrologically improving matric suction on slope by woody roots, as well as the negative effects of additional weight of trees.

基于极限平衡理论，综合考虑土质边坡上林木根系的力学加固土壤作用和水文增加基质吸力效应，以及林木附加自重对边坡稳定的负面效应，建立了一个用来评价造林土质边坡浅层平面滑坡的分析模型。

The hypogeal insect pests of eucalyptus are a group of special insect pests, having made serious damages to the young plantation. To solve the problem, it is necessary to use chemicals to control the population of those insect pests. The selection of chemicals and the methods of chemical application must be appropriate so as to lighten and minimize the negative impacts of chemicals on the ecological environment.

桉树地下害虫是一类特殊的害虫群体，在造林初期的危害比较严重，此时应针对不同的害虫选用不同的化学药剂来控制其种群密度，施药时要考虑减轻化学药剂对生态环境的不利影响，应采用毒饵诱杀、根部施药等方式。

The results showed that biomass of Eucalyptus exserta stands were increscent with the increasing of stand age.It was 2.77 t/hm2 in the stand of 0.7 year and was 70.932 t/hm2 in the stand of 7.7 years.

结果表明，窿缘桉林分的生物量是随着林分年龄的增长而增加，即由造林初期(0.7 a生)的2.77 t/hm2增加到主伐期(7.7 a生)的70.932 t/hm2。

However, the economic loss in upper stands could be compensated with monetary gain from rattan plantations that generated considerable economic benefit. The level of economic gain and the increment of NPV by interplanting G.

与单株种植相比，丛栽能明显提高藤林的产量；进一步的经济分析表明，2株丛栽可获得最高的经济收益，因而在进行造林时以2株丛栽为宜。

The growth after planting of one-year seeding of Larix principis-rupprechtii and dealing with the different medicaments was studied.

本文研究了不同药剂处理条件下华北落叶松一年生苗木造林后的生长情况。

Larch {Larix gmelinii is an important sylvicultural species in northeast China.

落叶松是我国东北地区的重要造林树种。

According to the study result of species selection,12 species of Eucaly-ptus and Acacia were introduced in 1993 in Yuanmou of Yunnan Province Through observing and analysing for more than 2 years and comparing the adaptability and rapidly-growing ability with Leucaena lecocephala introduced successfully before the authors found that Eucalyptus camaldulensis,A auriculiformis ,A caciamangium were the optimal afforestation species in dry-hot river valley of Yuamou This had certain significance to guide...

根据树种选择研究结果，1993年在云南元谋引种桉属和金合欢属树种12个，经两年多的初步观测分析，并与原引种成功的新银合欢比较适应性和速生性，认为赤桉、大叶相思、马占相思可作为元谋干热河谷造林的最优树种，逐步扩大栽培试验，对当地植被恢复适生树种的使用具有一定指导意义。

In order to accelerate close canopy of new plantation Phyllostachys nuda forest,fertilization experiment on new growing bamboo was carried.

为了促进新造林的郁闭，对新造石竹林进行施肥研究试验。

We thought that the studyresults could provide the theoretical basis for conservation of Picea mongolicaforest and construction of Three-North Protection Forest System.

本文的研究将为沙地云杉林的保护、扩大造林面积及&三北&防护林体系建设提供理论依据。

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。