土壤质量特征,Soil quality characteristic
1)Soil quality characteristic土壤质量特征
英文短句/例句
1.RESEARCH ON CHARACTERISTICS OF SOIL QUALITY DURING KARST ROCKY DESERTIFICATION PROCESS IN GUIZHOU PROVINCE贵州喀斯特石漠化过程中土壤质量特征研究
2.The Study of Soil Quality Properties of Slope in Western Middle-Low Mountains of Sichuan Basin;四川盆地西缘中低山坡地土壤质量特征研究
3.Study on Soil Quality and Controling Countermeasures of in Hongyuan Gold Mining District in Lilin County of Hunan Province醴陵市洪源金矿区土壤质量特征及治理对策研究
4.Systematic assessment and regional features of soil quality in the Hainan Island海南岛土壤质量系统评价与区域特征探析
5.Characteristics of Tea Plantation Soil Environmental Quality Around the Dongting Lake in Hunan Province;湖南省洞庭湖区茶园土壤环境质量特征
6.Spectral Characteristics and Estimation of Organic Matter Contents of Different Soil Types不同类型土壤的光谱特征及其有机质含量预测
7.Yanbian Flue-Cured Tobacco Quality Characteristics and Relationship between Rhizosphere Soil Environment and Flue-Cured Tobacco Quality延边烟叶质量特征及土壤环境与烟叶质量形成的关系研究
8.Temporal-spatial Variability of Soil Quality under Different Vegetation Covering on the Loess Plateau;黄土高原不同植被覆盖下土壤质量的时空变异特征
9.Distribution characteristics of soil pH,CEC and organic matter in a small watershed of the Loess Plateau黄土高原小流域土壤pH、阳离子交换量和有机质分布特征
10.Response of Soil Quality to Vegetation Succession in Karst Region;喀斯特地区土壤质量对植被演替的响应特征研究
parative Study on the Soil Water Retention Curve between Macroporous Soil and Homogeneous Soil大孔隙土壤与均质土壤水分特征曲线比较研究
12.Characteristics of Fractal Dimension of Limestone Soil and Its Correlation with Soil Properties石灰岩区土壤分形特征及其与土壤性质的关系
13.A Study on Soil Contact Angle and Soil Surface Free Energy Properties;土壤接触角及土壤表面能量特征的研究
14.Geostatistics-based Characterization of the Spatial Distribution and Temporal Changes of Soil Fertilities in the Region Around Taihu Lake in Jiangsu Province, China;基于地统计学的江苏省环太湖地区土壤肥力质量演变特征研究
15.The Study of Soil Chemical Properties and Biomass Spatial Heterogeneity in Daqing;大庆盐渍土壤特征值及生物量的空间异质性研究
16.Soil Fertility of Different Fertilization Systems and Its Effect on Crop Yield and Quality;不同施肥制度土壤肥力特征及其对作物产量和品质的影响
17.Soil Organic Matter, Phosphorus and Potassium Fertility of Different Fertilization Systems and Its Effect on Crop Yield;不同施肥制度土壤腐殖质、磷钾肥力特征及其对作物产量的影响
18.Geochemistry Characteristics of Heavy Metal Elements in the Soil and Its Quality Conditions, Pengshan County, Sichuan, China四川彭山县土壤重金属元素地球化学特征及其质量评价
相关短句/例句
soil characteristics土壤特征
1.Differences in ground vegetation andsoil characteristics in adjacent birch and spruce stands of southern Sweden;瑞典南部相邻桦树和欧洲云杉林分的地表植被和土壤特征(英文)
2.There are significant difference ofsoil characteristics in each forest model forest.以重庆缙云山8种不同构建模式的水源涵养林及林地土壤为研究对象,用物种多样性指数(Simpson指数、Shannon-Wiener指数)、均匀度指数(Pielou指数)和物种丰富度指数(Margalef指数)以及用土壤容重、毛管孔隙度、非毛管孔隙度、pH值、有机质、全氮、全磷、全钾、速效氮、有效磷、速效钾和阳离子交换量12个指标表征土壤的物理性状和养分特征,分析了8种群落的植物多样性、土壤特征及二者的相互关系。
3.In our research,soil moisture contents in typical mountains in Dongjiang were measured by TDR in many locations with different land covers,landform,soil characteristics,land surface slopes in different slope position.选取广东省东江流域内具有不同覆被、地形、土壤特征的典型山体,利用TDR测定山体不同位置的土壤含水率,分析土壤水的空间分布规律及其影响因素。
3)soil properties土壤特征
1.Characteristics of artificial grassland plant communities with different establishment duration and their relationships withsoil properties in the source region of Three Rivers in China;三江源地区不同建植期人工草地植被特征及其与土壤特征的关系
4)Soil salt transpo rtcharacteristics土壤盐分变化特征量
5)soil moisture characteristic土壤水特征
6)soil enzyme characteristics土壤酶特征
延伸阅读
土壤水分特征曲线土壤水分特征曲线soil moisture characteristic curveturang shuifen tezheng quxian土壤水分特征曲线(5011 moisture ehar.aeteristie eurve)土壤水分的基质势与含水率的关系曲线，也称土壤水分保持曲线。它是1939年英国土壤物理学家查尔兹(E. C. Childs)在第一次国际土壤学会上建议命名的。绘制此曲线以吸力表示基质势的负值。土壤水分特征曲线可间接地反映土壤中不同孔隙的孔隙容积，由此可以计算对植物生长有利孔隙的分布情况。该曲线可以分析各种土壤的持水性与土壤水的有效性。利用土壤水分特征曲线可进行土壤水分能量(基质势)与数量(含水率)间的换算。在田间用负压计监测土壤吸力，利用土壤水分特征曲线，即可了解土壤墒情。该曲线还可用于灌溉与排水的管理。由水分特征曲线的斜率得出的容水度，也是分析土壤水分运动所需要的参数。-含水率与吸力的关系当土壤处于饱和状态，土壤水吸力为零时，对土壤施加一微弱的吸力，土壤中无水流出;当吸力增加至超过某一临界吸力Sa值时，土壤中大孔隙开始排水，含水率开始减少(见图)。临界吸力，也称进气吸力或进气值。沙质土壤有较明显的进气值。当吸力继续提高至大于更多较小孔隙内的吸持力时，较小孔隙中的水分便排除出来。因此，土壤水分特征曲线就是土壤含水率随吸力的提高(即基质势的降低)而减少的关系曲线，此曲线也表明了土壤中土壤水能量和数量之间的相互关系。亘‘5。…l{臀番‘00}{\细，\。一_11\丫50卜\沙、、、I0 .1 0.2 0.3 0.4体积含水率e0 .5 0.6土壤水分特征曲线土壤水分特征曲线的形状它受多种因素影响。首先，受土壤质地的影响。沙质土壤孔隙较大，施加较小的吸力就能从土壤中排出水分。大孔隙排空后，仅有少量的水存留在土壤中。粘质土壤，孔径分布较均匀，以薄膜的形式吸附的水分多，要施加很大的吸力才能从土壤中排出水分。其次，受温度变化的影响，当温度升高时，水的粘滞性和表面张力下降，吸力降低。温度对不同土壤和同一土壤在不同含水范围的影响不同。土壤水分特征曲线还和土壤中水分的变化过程有密切关系。此外，土壤水分特征曲线还受土壤的结构和密度，矿物成分，有机质含量，水分中的化学成分等其他因素的影响。土壤水分特征曲线的测定在室内用张力计(负压计)法或砂性漏斗法均可测得低吸力下扰动或原状土样的水分特征曲线。还可用水汽压平衡法和离心机法等施测。在田间，若在地下水位稳定、无植物生长的地面上，防止蒸发，待自然平衡后，土壤剖面上水分分布曲线即是局部的水分特征曲线。
