The result shows:(1) The soil density and stone content increased with increasing soil depth;while total porosity,capillary porosity,non-capillary porosity,saturated water content,(capillary) soil water content,and field capacity of soil decreased with increasi.
结果表明:(1)随土深增加,土壤密度和石砾含量逐渐增大,而土壤总孔隙度、毛管孔隙度、非毛管孔隙度、土壤饱和持水量、毛管持水量和田间持水量却逐渐减小,但非毛管孔隙度在100cm以下土层时因石砾含量加大却随土深增加而增大;(2)各项土壤水文物理性质基本上均是阴坡优于半阴半阳坡和阳坡,半阴半阳坡与阳坡差别不大;(3)随着坡位下降,土壤厚度、土壤密度、石砾含量、非毛管孔隙度逐渐增大,总孔隙度和毛管孔隙度逐渐减小,各种持水量指标基本上也是程度不同地减小,但上坡的持水量指标大于阴坡坡顶;(4)4种植被类型0~30 cm土层的土壤密度为天然灌丛<天然草地<乔木林地<退耕地;石砾含量为退耕地最低,其它3种植被类型差别不大;总孔隙度、毛管孔隙度、饱和持水量、毛管持水量和田间持水量均是天然灌丛>天然草地>乔木林地>退耕地;非毛管孔隙度则是退耕地>乔木林地>天然灌丛>天然草地。
In order to find out the effects of super absorbent polymers(SAP) on physical and chemic characteristics of soil and apply it reasonably on drought resistance and water saving,soil moisture constants,soil density,pH values,soil expansion ratios and soil hardness of SAP-mixed soil were measured at experimental station,Agricultural University of Hebei.
结果表明:保水剂能显著提高土壤中的土壤水分常数和土壤孔隙度,但混剂土的土壤密度减小;保水剂能明显提高土壤的膨胀性能65%~170%;保水剂加入土壤后对土壤的pH值影响较小;在土壤大量失水后,保水剂能明显降低土壤坚实度,对照土壤的硬度是混剂土硬度的5。
With the increment of soil bulk density and water discharge rate, the movement of horizontal wetting front increased and the vertical movement decreased.
土壤质地、滴头流量、土壤密度以及供水方式等因素对于点源入渗有着一定的影响。
In the whole watershed,mean soil carbon density of mountain area was 25.
论文利用改进的土壤类型法———基于网格的土壤类型法,以干旱区典型的三工河流域为例,精确估算流域土壤碳储量,分析土壤碳密度的空间分布特征,为干旱区土壤碳循环研究提供数据支撑。
For the whole soil section,soil carbon density in all forest types varied from 12.
(2)4种林分土壤碳密度存在显著差异,其各土层变化范围为1。
For the whole soil section,soil carbon density in all forest types varies from 13.
(2)4种林分土壤碳密度差异显著,其各土层变化范围为1。
ionizing radiation backscatter soil density meter
电离辐射反散射土壤密度计
Monte Carlo Simulation of the Soil Density and Moisture Content by the Attenution Method of ~(137)C_s
用~(137)Cs衰减法测定土壤密度和含水量的蒙特卡罗模拟
Soil compaction may limit horizontal root extension.
土壤的紧密度能限制水平根的扩展。
Undergrowth Vegetation and Soil Properties of Pinus massoniana with Different Densities
不同密度马尾松林下植被和土壤性质
Water and soil losses bore a close relationship with the rainfall and the soil moisture before raining.
水土流失同降雨及降雨前土壤湿度关系密切。
soil consistence
土壤结持度, 土壤稠性
Studies on Understory Vegetation and Soil Properties Affected by Tree Density in Coniferous Plantations;
密度调控对针叶人工林地被和土壤影响的研究
Researches on Soil Organic Carbon Density and Carbon Sequestration Effects in the Farmland of Yangtze Delta;
长三角农田土壤有机碳密度及碳收集效应研究
Effects of Fargesia Denudata Density on Soil Carbon, Nitrogen Pool Beneath Subalpine Forest of Western Sichuan;
川西亚高山箭竹密度对土壤碳、氮库的影响
Soil organic carbon density of 4 forest types in Jinyun mountain of Chongqing
重庆缙云山典型林分土壤有机碳密度特征
Research of Soil Thermal Diffusivity and Liquid Water Flux Density at linfen City
临汾市土壤热扩散率和液态水通量密度研究
Study on Soil Organic Carbon Density of Main Plantations in the Dabashan Forest Areas
大巴山林区主要人工林土壤有机碳密度的研究
Predicting Parameters of Soil Moisture at Different Sampling Intensities
不同采样密度的土壤水分特征参数预测
Study on Soil Organic Carbon Densities of Artificial Pinus massoniana in Sichuan Province
四川省马尾松人工林土壤有机碳密度研究
Effects land-use types on soil microbial characteristics and carbon density in the loessial hilly-gully region
黄土丘陵区土地利用类型对土壤微生物特征和碳密度的影响
Estimation and Uncertainty Assessment of Spatial Distribution of Soil Nitrogen Density in Densely Populated Rural
人口稠密区土壤氮密度空间分布估算及不确定性评价
Analysis of Soil Organic Carbon Density in the Lithoid Mountainous Area in North China:A Case Study in Miyun County
北方石质山区表层土壤有机碳密度特征分析——以密云县为例
Study on Soil Water Characteristic and Suitable Density of Artifical Robinia Psedoaeacio on Slope of West of Shanxi Province;
晋西黄土区人工刺槐林地土壤水分特征及合理密度研究
