土壤水分特征,soil moisture characteristics
1)soil moisture characteristics土壤水分特征
1.Soil moisture characteristics of apple-planting subarea in Weibei dry highland,Shaanxi Province.;渭北旱塬苹果种植分区土壤水分特征
英文短句/例句
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
2.Soil Moisture Characteristics under Hedgerow Intercropping System植物篱模式下土壤水分特征变化研究
3.Research of soil water character below artificial forest of the heaviest rainfall year in Luochuan area of Yan an;特大丰水年洛川人工林地土壤水分特征研究
4.Soil moisture characteristics of different vegetation measures in loess hilly region of southern Ningxia宁南黄土丘陵区不同植被措施的土壤水分特征
5.Soil Water Characteristic of Forest Grass Intercropping Models in Hilly Area of the Loess Plateau;黄土丘陵沟壑区林草间作地土壤水分特征研究
6.Study of Soil Water Characteristics in Loess Hilly-Gully Region of Yanan;延安黄土丘陵沟壑区土壤水分特征研究
7.Characters of Soil Moisture under Different Vegetation Types in Xishui Slope浠水坡地不同植被类型土壤水分特征研究
8.Curve Fitting and Analysis for Soil Water ?Characteristic Data of Beijing Xishan Mountain京西山地土壤水分特征数据的拟合与分析
9.Study on the Characteristics of Soil Moisture Content in the Apple Growing Subregions of the Weibei Dry Highland In Shaanxi Province;陕西渭北旱塬苹果种植分区土壤水分特征研究
10.A Fractal Study on Soil Structure and Soil Water Movement Model;土壤结构的分形特征及土壤水分运动模型研究
11.Analysis on Monthly and Seasonal Variation of Soil Moisture in Shanghai上海地区土壤水分月季变化特征分析
12.Prediction Method of the Characteristic Curve of Water in Brown Soil潮棕壤土水分特征曲线预测方法研究
13.Estimation of soil moisture from Ts-EVI feature space基于Ts-EVI特征空间的土壤水分估算
parison of Soil Water Properties of Hilly Red Soils in Guangdong广东丘陵红壤土壤水分性能特征比较研究
15.Effects of Soil Moisture on Water Utilization Characteristics of Rice(Oryza sativa)不同土壤水分含量对水稻水分利用特征的影响
16.Characters of soil moisture niche-fitness of locust forest in the Loess Plateau黄土高原坡面刺槐林土壤水分生态位特征分析
17.ESTIMATING SOIL WATER RETENTION CURVE BASED ON FRACTAL DIMENSION OF SOIL PARTICLE SIZE DISTRIBUTION OF PURPLE SOIL根据土壤粒径分形估计紫色土水分特征曲线
18.Spatio-temporal Variability of Soil Water and Water Balance Analysis in Field;农田土壤水分时空变异特征及水量平衡分析
相关短句/例句
soil moisture characteristic土壤水特征
3)soil water characteristic curve土壤水分特征曲线
1.Study onsoil water characteristic curves of soils of same quality (heavy loam);同一质地(重壤土)土壤水分特征曲线的研究
2.Establishment and application of one-parameter model ofsoil water characteristic curve;土壤水分特征曲线单一参数模型的建立及应用
3.Evaluation of two indirect methods to estimatesoil water characteristic curve of loess soil;两种土壤水分特征曲线间接推求方法对黄土的适应性评价
4)soil water retention curve土壤水分特征曲线
1.Fractal approach for estimatingsoil water retention curves of various textures;估计不同质地土壤水分特征曲线的分形方法
2.Functional equations can be established between thesoil water retention curve and the fractal dimension of soil struc- tures by the fractal geometry theory.利用这些函数关系式与Campbell经验公式具有相同或相似的幂定律形式的特点,由土壤水分特征曲线反推土壤孔隙分形维数,这不仅可以揭示Campbell经验公式与土壤孔隙结构之间的内在联系,还可为建立土壤非饱和水力参数的分形模型提供理论依据。
3.This article estimated thesoil water retention curve of brown earth in Liaotung peninsula based on the fractal theory,discussed the feasibility of this method,analyzed the factors that would affect the method.应用分形理论估算了分布于辽东半岛棕壤的土壤水分特征曲线,通过估算结果与实测结果的比较,探讨了分形方法估算土壤水分特征曲线的可行性,分析了影响该方法估算精度的因素,认为用分形方法估算土壤水分特征曲线以粘粒和粉粒含量较少、质地偏粗的土壤效果较好。
5)the model of soil moisture feature curve土壤水分特征曲线模型
6)soil water physical properties土壤水分物理特征
1.The soil water physical characteristics, deficit of the soil water content, and dynamics of the soil water content were studied during the vegetation restoration of the southern semi-arid region of loess Plateau in Ningxia , the results are as following:(1) There are obvious differences related tosoil water physical properties of different vegetation types.本研究对宁夏南部半干旱黄土丘陵区植被恢复过程中封育草地的土壤水分物理特性,土壤水分亏缺,及土壤水分时空动态等特征进行了系统测定并对土壤水分变化特征进行了综合的评价,结果如下: (1)不同草地类型之间各项土壤水分物理特征存在显著差异。
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。
