field capacity造句

• Field capacity is a property of a unit volume of soil .
  野外容水率是单位土体的一种特性。
• Soil at field capacity has a high water potential
  土壤处于田间持水量时通常有很高的水位。
• Field capacity field moisture capacity
  田间持水量
• Any more water added to soil at field capacity would drain away by gravity
  超过田间持水量的所有添加的水分的都会由于重力作用而流失。
• Field capacity the point at which the soil contains all the water it can hold by capillary and chemical attraction
  田间持水量：土壤通过毛细作用和化学吸力可维持的全部水量。
• Water content at field capacity is usually expressed as a percentage of the weight or volume of oven - dry soil
  土壤含水量一般用干土壤的重量或体积百分比来表示，它受土壤质地的影响。
• The threshold value of soil water contents for photosynthesis and stomatal resistance is about 14 ( 0g ) , i . e . , 60 65 of field capacity
  棉花的光合速率和气孔阻力随土壤含水量变化的阈值约在14土壤含水量水平，该阈值相当于田间持水量的60 65 。
• In conclusion , the variable degree of the soil water properties and bulk density in different layers is water content > wilting point > field capacity > saturation > bulk density
  总的来看，各水分特性在剖面各层的变异情况为:含水量>萎蔫含水量>田间持水量>饱和含水量>容重。
• Bulk density in 0 ~ 20cm , 20 - 40cm and field capacity in 20 ~ 40cm can be simulated with pure nugget effect model , and they are not spatially correlated in sampling scope . 4
  O ~加cm 、 20一40cm土壤容重和2 } 40cm田间持水量符合纯块金效应模型，说明在采样范围内它们的空间相关性不存在。
• The coefficient of variation of saturated water content decreased with the depth of profile . the coefficient of variation of bulk density and field capacity fluctuate with depth of soil
  饱和含水量的变异系数都随深度的增加逐渐降低，含水量、容重和田闷持水量的变异系数随深度的呈波动变化。
• The field capacity and porosity increase gradually and bulk density decrease gradually . the significance linear regression between the field capacity and soil organic matter is discovered as well as porosity and bulk density
  此外，随植被演替， 0 5cm土层田间持水量和孔隙度逐渐增加， 0 5cm土层容重逐渐降低，且均与有机质含量呈显著线性正相关。
• According to physiognomy , the bulk density changed as the following order : upland > hills > hillslopes > gully slopes , the saturated soil moisture arranged as : hillslopes > hills > gully slopes > upland , while field capacity and wilting moisture are as follows : gully slopes > hills > hillslopes > upland
  在地貌上，土壤容重呈现出塬面梁顶沟坡梁坡，饱和含水量呈现出塬面沟坡梁顶梁坡，田间持水量和萎蔫湿度均呈现出沟坡梁顶塬面梁坡的趋势。
• The objectives of this study are : ( 1 ) collect the basis data about soil physical properties , soil moisture , infiltration and evapotranspiration in the catchment scale for developing a catchment hydrological model , based on the dtm , ( 2 ) provide the hydrological information in the catchment scale for developing agricultural production , vegetation rehabilitation , and reasonable land using in this region . the main conclusions drawn from this study are : ( 1 ) the soil physical properties , including bulk density , saturated soil moisture , field capacity , and wilting moisture , were measured at 56 plots across the catchment
  为此，本文以黄土高原沟壑区典型小流域?王东沟为研究对象，通过大量的野外测定和室内分析，系统研究了流域土壤容重、土壤饱和含水量、田间持水量、萎蔫湿度、土壤入渗性能、土壤含水量和蒸散量的空间变异性，以期为该区农业生产、植被恢复和土地合理利用等提供科学的依据，同时为建立基于数字高程模型( dtm )为基础的流域水文模型积累基础资料。
• The soil physical properties have obvious vertical distribution characteristic in the slope . the bulk density in sunlit slope is greater than it in sunless slope , and change in the follow order in the slope : top < middle < lower . while saturated soil moisture , field capacity , and wilting moisture are on the contrary
  在地形上，土壤物理性质具有明显的垂直分布规律，阴坡除土壤容重外，饱和含水量、田间持水量和萎蔫湿度均大于阳坡；同一坡度和坡向下，容重从坡下向坡上递增，饱和含水量、田间持水量和萎蔫湿度均从坡下向坡上递减。
• It was found that the soil physical properties had significant spatial variability in the catchment scale because of the joint - influences of land use , topography , physiognomy , and other factors . the spatial variation is small for field capacity , moderate for wilting moisture and bulk density , and great for saturated soil moisture
  受地形地貌和土地利用等因素的综合影响，土壤物理性质在流域尺度内存在显著的空间变异，饱和含水量的空间变异性最大，土壤萎蔫湿度和土壤容重居中，田间持水量空间变异最小。
• The physical and chemical properties of the soil were analyzed , including nutrient change and routine index of acidity and alkalinity , in addition , compared them with natural soil and studied their variation and correlation . the results as follows : the soil bulk density of harbin urban vegetation is higher , total porosity and field capacity are small
  对其土壤的理化性质和养分状况等指标进行分析，并与松花江地区自然黑土进行了对比，研究其变化的趋势和养分相关性。结果表明：哈尔滨城市绿地土壤容重较大，孔隙度和田间持水量少，有机质缺乏，养分含量较低，相关性差，土壤ph值呈中性，肥力水平低。
• Moreover , according to different land use types , bulk density shows the lowest value for the woodland while the highest value for the grassland and the subsoil of farmland , saturated soil moisture and field capacity exhibit the highest values for woodland while the lowest for the grassland and the subsoil of farmland , and the wilting moisture in woodland is also the highest and that in the farmland is the lowest
  不同土地利用类型土壤物理性质也存在显著差异，容重以农地亚表层和草地较大，林地较小；饱和含水量和田间持水量以林地较大，农地亚表层和草地较小；萎蔫湿度则以林地较大，农地和果园地较小。
• The lower limits of soil moisture for rational deficit irrigation scheduling to cotton at its different growth stages are 55 60 , 65 , 70 and 50 55 of field capacity at seedling , buds , bolls and wadding stages , respectively
  合理的棉花调亏灌溉制度是苗期控制水分供应，土壤含水量维持在田间持水量的55 60 ；蕾期和花铃期是棉花的需水关键期，土壤含水量应分别保持在田间持水量的65和70左右；吐絮期应控制水分供应，土壤含水量维持在田间持水量的50 55 。