群落

That is, the appropriate electric field should be a uniform electric field in the strength of 1.0V/cm with the reversal time interval of 10 min in rhizosPHere soil; while the appropriate electric field should be a uniform electric field in the strength of 1.5V/cm in non-rhizosPHere soil.

施加均匀场1.0V/cm的同时，每隔10min切换极性，是土壤根际微生物群落在电场作用下比较合适的电场条件；而对土壤非根际微生物来说，施加均匀场1.5v/cm是相对比较合适的电场条件。

The results also showed that less shifts in soil microbial biomass and two ecophysiological parameters were occurred in planted soils as compared with the respective unplanted soils, suggesting that the influences on microorganisms by Pb contamination was related to different management and the clay and organic matter contents of the soils.

对21种磷脂脂肪酸的图谱进行分析，结果表明，受铅污染土壤的微生物群落结构组成伴随着功能参数的变化而发生了改变；随着铅污染程度的增强，指示真菌和放线菌类的脂肪酸增加，而革兰氏阳性菌与革兰氏阴性菌脂肪酸比值下降。

The plant community composition changed and the community coverage increased over the wetland succession from primary swamp, through swampy meadow, to meadow. The number of associated species increased, while the dominant species abundances decreased. Through succession, the content of soil organic matter and total nitrogen declined. In contrast, the soil enzyme activity of catalase, protease and invertase increased; however urase declined.

随着湿地原生沼泽向沼泽化草甸、草甸的演替，湿地植物群落盖度增加、物种组成增多，群落优势种优势度减小，伴生种数量增加，植物多样性呈增加趋势；湿地土壤有机质、全氮含量不断减少，过氧化氢酶、蛋白酶、蔗糖酶活性增加，脲酶活性降低。

In the 5 000 m2 area investigated, there were 132 vascular bundle plant species belonging to 64 families and 111 genus.

其主要结果如下：（1）白云山楝叶吴茱萸群落外貌以常绿为主，种类组成丰富。

The results show that 195 species in 144 genera and 79 families of vascular plants were found in the 10 000 m2 plot .

基于10 000 m2 样地的帽峰山次生林群落共有维管束植物195 种，分属于79 科144 属。

These species represent 13 extant species vegetatively present in the community which and 17 species of earlier, seral species.

种子库中有现存植物种子13种，群落演替前期各阶段产生的种子17种。

Wetland bird ; community diversity ; water bird ; wader ; environmental impact

湿地鸟类；群落多样性；水鸟；涉禽；环境影响

First this paper analyzes and clarifies the statistical investigating data of winter migrant birds in Poyang lake in many years, and selects 44 samples on behalf of the main lake, this paper analyzes the birds community characteristic of abundant, variety, even, dominant and the meeting rate among the plant; this paper selects 10 environmental elements according to the reality of Poyang lake and selects the characteristic bird among rare plant, normal plant, wading bird, swimming bird etc, and.

本文首先通过对环鄱阳湖地区越冬候鸟多年调查统计数据的梳理和分析，筛选44个具有代表性主要湖泊作为样本，分析了各湖候鸟群落的丰富度、多样性、均匀性、优势度和种间相遇机率等特征；根据鄱阳湖实际选取10个环境因子，从稀有种、常见种、涉禽、游禽等方面结合选择具有代表性候鸟，进行了候鸟与湿地环境因子的相关关系分析。

Water is not only a carrier of lives in biotic community but also a medium for energy movement and matter cycling.

水是生物群落生命的载体，又是能量流动和物质循环的介质。

And the best water-conserving and flood-controlling forest cover is the main index for regional scale diposition. While the small watershed scale should consider the forest type. And the stable forest structure is the key factor for the disposition in slope and gully scale.

指出在区域尺度上，主要以理水调洪森林覆盖率为区域空间配置的指标；在小流域尺度上主要考虑防护林林种的配置方式；而在坡面和沟道尺度上，主要考虑防护林树种和植被群落的稳定林分结构设计。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。