| 1. | We own a piece of bare land with no property built upon it
我们拥有一块土地，上盖并无任何建筑物， |
| 2. | In addition , bare land covered with weed would delay runoff - yielding time , increase infiltrated water , and make soil water move deeper
裸地坡面覆盖杂草，能延缓产流时间、增加入渗，并促进土壤水分向深层的运移。 |
| 3. | Compared to bare land , soil water cycling on grassland with intensive transpiration was deeper in depth and greater in intensity
与裸地相比，荒草地由于植被强烈的蒸腾作用，其土壤水分循环强度加剧，表现为活跃层、次活跃层以及蒸发蒸腾作用层深度增大。 |
| 4. | Co2 ' s respond to the temperature in forest land is more moderate than that in the bare land , indicating vegetation ' s role of restraining to the carbon cycle
乔木林内的coz对温度的响应比裸地内c02对温度的响应要和缓些，显示了植被对碳循环的“平抑”作用。 |
| 5. | However , they seldom focus on karst districts . we took the karst experimental site of jinfo mountain nature reserve area as example . we select four experimental sites - grassland , forest . the bare land and chimonobambusa to carry out the research
尽管人们对土壤co _ 2的日动态及季节变化进行过一些研究，但对占全球陆地总面积15的岩溶地区土壤co _ 2的变化特征研究则较少。 |
| 6. | 2 comparison with the sand transporting rate of cultivate land , cultivate afterward harrowing land and flat bare land indicate that the sand transporting quantity of cultivate land and cultivate afterward harrowing land is separately lower than - flat bare land 88 . 2 % and 66 . 2 %
2对耕翻地、耕后耙地以及平坦裸地输沙量观测，表明耕翻地与耕后耙地分别比对照平坦裸地的输沙量降低了88 . 2与66 . 2 。 |
| 7. | But variation of the co ; concentration in the bottom soil show that sink effect of carbonate rock on the soil air co2 ( 2 ) the diurnal observation results of soil co2 dynamics in the different vegetation show that the soil co2 concentration in the bare land is sensitive to environment , but the soil co ; concentration in the other experimental site , which covered with vegetation , restrain the variation
在土壤?大气界面上，土壤表层可为大气提供游离co _ 2 ；而土壤深部co _ 2浓度的变化则显示下覆碳酸盐岩对co _ 2有吸收作用。 ( 2 )在不同植被系统中，土壤co _ 2昼夜动态变化进程不同。观测资料表明：裸地对外界环境的变化相当敏感，而有植被覆盖的竹林和草甸对土壤co _ 2浓度动态变化有平抑作用。 |
| 8. | Papers about methane and nitrous oxide were concerning in bare land soil and the effect factors up today . almost no information was on the nitrous oxide and methane fluxes from greenhouse soil and its microbiological mechanisms . therefore , it was valuable to observe the fluxes of methane and nitrous oxide from green - house soil and demonstrate its microbiological mechanisms
目前国内外关于农田甲烷和氧化亚氮排放通量的研究，仅局限于报道大田作物在当季生长期内甲烷和氧化亚氮的排放及其影响因子，但在设施栽培条件下土壤甲烷和氧化亚氮排放及其微生物学机理及相互间关系至今未见报道。 |
| 9. | Article 43 the municipal people ' s government shall take measures such as the responsibility system for afforestation , strengthening administration of construction operation , expanding the area of the paved ground , control of the heaping up of debris and waste and using clean transportation measures to increase the per capita possession of green land , reduce the size of bare land and surface dirt , and prevent and control the dust pollution in the urban areas
第四十三条城市人民政府应当采取绿化责任制、加强建设施工管理、扩大地面铺装面积、控制渣土堆放和清洁运输等措施，提高人均占有绿地面积，减少市区裸露地面和地面尘土，防治城市扬尘污染。 |
| 10. | This paper deals with the fluxes of nitrous oxide from green - house soil , the methane oxidation by the soil , and microbiological mechanisms . the results obtained were reported as the followings : 1 ) it showed that the flux of n2o from the greenhouse was much higher than that from the bare land
因此，研究农业设施栽培条件下，甲烷和氧化亚氮排放及其微生物学机理，既可明确甲烷和氧化亚氮的排放通量，又能提供有效控制甲烷和氧化亚氮排放的措施，为农业和环境的可持续发展提供科学依据。 |
