造林

Forestry elements(tree species, standage,afforestation density etc), ecological elements (hillside direction, hillside seat, soil type etc) and meteorological elements (temperature,humidity, precipition etc) were the leading factors...

通过对病菌孢子飞散规律和病情调查的定性因子和定量因子进行相关的分析结果，已明确了林分因子(树种、林龄、造林密度等)、生态因子和气象因子交互作用是樟子松枯梢病流行的主导因素。

The plants of the family Tamaricaceae, a family with long history, have occurred in ancient Mediterranean region since Tertiary. Most of them are drought-telerant plants, which are suitable to be used as wind-preventing, forest-making and soil-holding plants. Ecologically, they are plants of great importance in reforming of desert and improving of climate condition in arid zone.

柽柳科是一个古老的科，起源于第三纪，包括亚洲中部的内的&古地中海&沿岸地区，该科植物主要为旱生植物，其中大多数种是防风、固沙造林和水土保持的优良树种，对改造沙漠和改善气候条件具有重要的生态意义。

Tilia amurensis sprouts and planted seedlings are very susceptible to forking.

紫椴萌生条和造林幼树极易分杈，原因是多方面的。

Trema angustifolia Blume is a superior planting species in dry and hot river valley areas.

麻柳树是干热河谷地区的优良造林树种。

The feasibility and validness of relieving floods by solid (aerial,ground and underground,etc)project and ecolgical measure are analyzed.

分析了利用空中、地面、地下等立体工程和生态措施进行削洪的可行性和有效性，指出将被动的抗洪救灾的巨大经费用到积极的治山造林上来，变洪水为宝贵资源的目标是可能逐步实现

The procedure, from budding to grow up, is a significant difference in every different land use type. It's very difficult to invade into the natural forest without any disturbance; For the sake of failure forestation and reclamation, L. lucocephalla and intolerant spices will invade into mixed woodland, and it will be a new dominant after competition finally; They has a high probability for invasion a..nd spread at abandon rural and graze land. The spread area of L.

种子萌芽到成株的过程中，因土地利用类型不同有显著差异，未经干扰之天然林银合欢无法入侵；次生林地由於造林失败或开垦之原因，银合欢与其他阳性树种一起入侵，经过生长竞争后，银合欢会逐渐成为优势树种；而休耕之裸露地或停止放牧之草生地，银合欢之入侵及扩散机率最大。

The research is focused on the agricultural and afforested landscape.

该系的研究主要集中于农业和造林景观。

Although afforested areas were increasing rapidly, the quality of forest was declining.

森林质量性状的改善对于维系和增加森林资源至关重要，但在我国森林经营管理中一直存在重数量、轻质量的现象，随着造林面积的增加，森林质量却在下降。

It is concluded that using techniques of drought resistance in dry area or sandy dryland could solve the problem in afforesting.

干旱或荒漠地区采取有效的抗旱栽植技术，可以有效地解决造林绿化中的难题。

This article main research content is afforests a system design operation easily for Yunnan, the contact surface is friendly based on the WEB man-machine interactive connection.

本文的主要研究内容就是为滇中造林系统设计一个操作简便，界面友好的基于WEB的人机交互接口。

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。