沙地

The individual growth,morphology and population biomass of Pennisetum centrasiaticum clones at two different habitats of farmland-sand dune ecotone on Keerqin sandy land of Inner Mongolia were compared in this study.P.centrasiaticum clones had significant morphological plasticity and different biomass distribution pattern at different habitats.

对生长在不同沙地生境下的白草无性系进行了个体生长与形态以及种群生物量等指标的比较研究。结果表明，生长在不同生境下的白草无性系表现出显著的形态可塑性和不同的生物量分配模式。

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。

For a long time, owing to forest fire, pests and ill management, the Picea mongolica forests suffered serious destroying, and almost reached the edge of distinction.

但是长期以来，由于森林火灾的发生、病虫害的蔓延和经营管理不善，致使沙地云杉林遭受严重破坏，甚至达到了绝灭的边缘。

Gradient distribution of soil n, p, and k along the distance from picea mongolica seedlings root surface .

沙地云杉幼苗根表土体中 n 、 p 、 k 的梯度分布。

The research demonstrated that the introduction of Picea mongolica from Baiyinaobao to Tongliao city and to Yijinhuoluo county was very successful.

4研究结果表明，沙地云杉苗木从原产地白音敖包向东部的通辽市，以及西部的伊金霍洛旗引种是十分成功的，但是由于时间有限，目前还不能下定论。

So, in order to provide scientific afforestation methods and guideline, it is rather necessary to introduce and popularize Picea mongolica in arid and semiarid regions.

但是该树种是云杉属中的特殊种，在半干旱草原中于沙地上能良好生长，有罕见的防风阻沙能力，大有在半干旱区甚至干旱区引种推广的必要。

Based on different treatments that had been used, this paper studied the breeding techniques and annual growth rhythm of the Picea mongolica seedlings.

采用不同做床方式、不同播种密度，夏季苗床不同遮荫方式等方法研究了沙地云杉育苗技术及其年生长规律。

Based on extensive literature review, the introduction and afforestation techniques of Pinus sylvestris var.

通过查阅相关文献，对沙地樟子松的引种栽培及造林技术进行了详细的阐述。

The Medieval Warm Period was another warm period after postglacial epoch. The research results indicated that drifting sands were fixed in sandy land during the MWP in eastern China.

中世纪暖期是冰后期的又一次回暖期，研究表明当时我国东部沙地均出现不同程度的流沙固定现象。

Results showed that total vegetation coverage, herbaceous coverage, and species richness were all decreased, and perennial species gradually gave place to psammophyte annuals, shrubs, and semi-shrubs from gentle slope hilly ridge, through saline bottomland and fixed and semi-fixed dune, and to shifting and semi-shifting dune.

结果表明，从缓坡丘陵梁地，经盐化丘间低地、固定半固定沙地到流动半流动沙丘，植被总盖度、草本植物盖度、物种丰富度均呈下降趋势；植被组成中多年生草本植物逐渐减少，一年生草本植物及沙生灌木、半灌木逐渐增加。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新