生态种群

The experiments with water as only limiting factor was designed to study the dynamics of size inequality in spring wheat ( Triticum aestivum L.)populations and its theoretical basis.Of the three densitywheat populations,the skew of weight distribution of wheat plants increase with time,and the increase rate is the highest in high density population.

在黄土高原半干旱生态条件下设置了低、中、高3个密度梯度的以水为限制因子的实验，各密度种群个体重量分布偏倚度随时间的延续而增大，增大的幅度随密度增高而上升。

In this paper, the global attractivity is investigated firstly, which includes the existence and stability of positive trivial solution, the attractivity of positive solution, etc.

本文首先研究了三类生态模型解的渐进性，其中包括正平衡态的存在性和稳定性，正解的吸引性等，其次讨论了一类单种群模型解的振动性问题。

The results indicated that there are has 21 kinds of alien invasive plant species which belonging to 21 generas and 13 families in Xiushan region, the alien plants has an important influence on the area where change farmland into woodland and the farm land that the condition of being unseeded, and the total coverage of the alien plant mostly reached 100%.

11入侵种是指在引入地建立了种群，改变或威胁本地生物多样性，对生态系统的结构造成了明显的损害和影响的外来种。u 1入侵植物就是指具有从原来的分布区域扩展到一个新的地区，在新的区域里其后代可以繁。。。。。。

With the whin growing rapidly,some areas have formed or is coming into preponderant species gradually and caused the drugged grassplot.There is a phenomenon that browsed critter are died because of poisoning.It seriously threatens the grassland agriculture and has made typical"ecological-economic sickness"in above district.

近年来棘豆迅速蔓延生长，在有些地区已经或正在向优势种群演替，造成草地毒草化，出现放牧家畜中毒死亡现象，严重威胁草地畜牧业，已形成了典型的"生态经济病"。

This paper summarized factors, both in biologic and abiological aspects that affected successful colonization and activity of bacterial inoculation. The impacts of inoculated bacteria on population structure of specific rhizobacterial communities and environment should also be paid an eye on.

本文主要针对国内外在影响微生物根际定殖的因素以及影响引入微生物活性的因素两方面的研究进行综述，同时强调对接种剂引入所引起的生物种群及生态环境变化应予以重视。

There is no premature convergence problem in the new model and parameters used in the model can be adjusted adaptively.

从两个方面改善了单种群的生态计算模型：在新的计算模型中，过早收敛问题不再存在，而且有关的参数能够自适应地调节。

Based on field experiment and measure data, ecological characteristics of soil water in different fencing sandy land in arid desert area and vegetation restoration effect of soil water variation in fencing sandy land were analyzed. In representation of Artemisa arenaria DC population, observing and researching vegetable restoration effect of soil water variation in fencing sandy land. The results indicate as follow:(1)With the vegetation development constantly in fencing sandy land, soil water utilization of vegetation increased. It made soil water content and soil water storage reduced with the increase of fencing time in sandy land.

本文通过野外实验测定数据，分析研究了干旱荒漠区不同类型封育沙地土壤水分生态特征，以及封育沙地土壤水分变化对植被恢复的影响，并以当地沙蒿种群为代表，观测研究封育沙地土壤水分变化对植被恢复的影响，结果表明：(1)封育沙地随着植被的不断生长，植被对土壤水分的利用也有所增加，从而使沙地土壤含水量和储水量随封育时间的加长而表现为一定的降低趋势。

Study of microbial ecology on the autecological factors, morphology and distribution of population and community succession was further carried out with the aim to understand the microbial characteristics in BAF.

为了探讨曝气生物滤池的微生物学机理，分别从个体生态条件、种群组成和分布、群落演替规律等方面研究了曝气生物滤池的微生物生态学特征。

Cyanophyta, Chlorophyta and Bacillariophyta were the dominant phyla of algae in the ecosystem.

通过大塘试验和围格试验，研究了围滩鱼塘生态系统中藻类的种群分布、变化及其与环境因子的关系。

It was found that Bodo was the food source of Gymnodinium and high salinity inhibited the growth of Bodo.

研究了它们的生态习性，包括pH阈值、盐度耐受范围和种群间关系，发现裸甲藻对波豆虫有捕食作用，且波豆虫不耐高盐。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。