查询词典 microbiotic

In order to understand the ecological meaning of the microbiotic soil crust in agriculture and animal husbandry of the North interlocks and takes,this research took Yanchi of Ningxia as an example to carry on the survey of soil crust and vegetation,and go on the test of infiltration with crust and no curst.

为了解我国北方农牧交错带生物结皮的生态意义，本文以宁夏盐池为例，采用样线调查法进行结皮及植被调查，并在有结皮和无结皮覆盖两种情况下进行入渗试验。

Soil microbiotic crusts play important roles in vegetation restoration and revegetation in desert area.

土壤生物结皮在沙漠地区植被恢复和重建中具有重要的生态学意义。

Evapotranspiration value and transpiration indexes of the three types of soil microbiotic crust under different water content(including Bryum argenteum crust,Didymodon nigrescens crust and algal crust) were measured.

通过对3种土壤生物结皮在对照和3个不同水分条件下进行蒸散量以及蒸腾指标的观测，结果表明：①3种土壤生物结皮蒸散量日变化过程呈现单峰型，各个处理间峰值出现时间和蒸散量变化幅度差异较大；真藓对照组峰值为0.473 g/10 cm2，出现时间为11：00时。

The dominant species of them were Artemisia halodendron Setaria viridis respectively; The reconverted grazing land and the natural reconverted farmland consisted of herb layer and microbiotic crust layer, but itsmain layer was herb layer. The dominant species of them were Cenchrus calyculatus Artemisia scoparia respectively.

草本片层的现阶段优势种为狗尾草；放牧自然恢复地和退耕自然恢复地均由草本片层和生物结皮片层构成，但其主要片层均为草本片层，该层现阶段优势种分别为黄蒿和光梗蒺藜草。

However, little research has been carried out on the relation between soil microbiotic crusts and the diversity of insect species.

然而，关于生物土壤结皮与昆虫种类多样性之间关系的研究却很少。

In arid and semi-arid zones, appearance of microbiotic crusts will change the surface condition of sand dunes greatly.

在干旱、半干旱地区，微生物结皮的出现完全改变了沙丘表面状况。

However,the soil moisture content at soil depths of 45 cm and 60 cm in the areas with microbiotic crusts is much lower than that in the areas without microbiotic crusts(LSD-test,p.05),which reveals that the microbiotic crusts have high capability of maintaining topsoil moisture.

在世界干旱区的大量研究表明，作为荒漠生态系统的重要成分，生物结皮的形成能够增强土壤抗风蚀及水蚀的能力〔3~8〕、增强其周围维管植物的养分循环〔9~11〕、通过生物固氮提供丰富的氮源〔12〕、促进种子库的建立和生物多样性等。

The result shows that well developed microbiotic crust results in less invalidation precipitation than sandy soil, but sandy soil conserves 18% precipitation in deeper layer when the soil covered with microbiotic crust had been dry completely.

结果表明，结皮和流沙地表的蒸发速率随时间的变化趋势基本相同，但在不同的蒸发阶段具有各自不同的特点，总的说来，发育良好的苔藓结皮导致相对较少的无效降水，但在更长的时间维持较高的蒸发速率；流沙和初步发育的降尘结皮导致了较多的无效降水，但由于降水的入渗深度相对较深，需要更长的时间完成蒸发过程。

Using the survey data of several indexes as well as field experimental data of soil hydrology of microbiotic crusts in artificial vegetation-fixed sand dunes in Shapotou area, the impacts of microbiotic crusts on soil hydrological processes which included the penetration, interception and evaporation processes of precipitation were examined, and their mechanisms were also studied. The security problem of vegetation-fixing system due to the changed soil water environment in fixed sand dune area was analyzed further.

本文在上面的立意下，我们对沙坡头人工植被固沙区对微生物结皮的若干指标进行了详细的调查和试验，并安排了一系列微生物结皮土壤水文过程试验，从不同的角度揭示了微生物结皮在降雨渗透、拦截和蒸发过程中的作用，及其对降水在沙丘土壤剖面中的水分分配过程和格局的影响，并进一步分析了微生物结皮对固沙区土壤水环境的影响和植被固沙体系的安全问题。

However, the soil moisture content at soil depths of 45 cm and 60 cm in the areas with microbiotic crusts is much lower than that in the areas without microbiotic crusts (LSD-test, p.05), which reveals that the microbiotic crusts have high capability of maintaining topsoil moisture.

结皮覆盖区距地表5cm和10cm处的土壤含水量显著高于无结皮覆盖区（LSD检验，P.05）；而45cm和60cm处的土壤含水量则表现为结皮覆盖区极显著低于无结皮区（LSD检验，p.05），说明生物结皮具有较强的保持土壤表层水分的能力。

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。