soil bulk density 中文意思是什麼

soil bulk density 解釋
土壤顆粒密度
  • soil : n 1 泥土，土壤；土質。2 土地，國土。3 滋生地，溫床。4 農業生活，務農。n 1 臟東西，污物，污穢，污...
  • bulk : n 1 體積，容積，大小。2 巨大；龐然大物；大塊；大批，大量。3 貨艙；船貨；散裝貨物。4 〈the bulk〉...
  • density : n. 1. 稠密；濃厚。2. 【物理學】濃度；密度；比重。3. 愚鈍，昏庸。
  1. At the same time, the quality of different - state water was studied. the results show : the soil bulk density of the fir wildwood heightens with the increase of soil depth, specifically 0. 74 > 0. 94 andl. 34g / cm3, the saturated, canaliculus and field moisture contents decrease gradually in layer a, b and c, accordingly the soil total foveola decreases gradually, and the moisture - hold capacity of the soil lessens gradually with the increase of the soil depth ; there is small difference of the soil bulk density between layer a and b in the outer space, which are respectively 0. 92 and 0. 99g / cm3, and the other laws are the same as the in ner in the main ; reverse success often occurs in the low position of the thoroughly - fell trace and plateau marsh is formed

    結果表明：冷杉原始森林土壤容重隨土層深度的增加而增大，分別為0 . 74 、 0 . 94 、 1 . 34g cm ~ 3 ，飽和持水量、毛管持水量、田間持水量a層、 b層、 c層逐漸減小，十壤總孔隙度也逐漸減小，土壤的持水能力隨深度的增加逐漸減弱；林外空地a層、 b層十壤容重相差不人，分別為0 . 92和0 . 99g cm ~ 3 ，其它規律與林內人體相同：皆伐跡地的低洼地段容易發生逆行演替，形成高原沼澤地。
  2. 2. the structure of purple soil is meliorated by sabaigrass. when contrast to bare land treatment and natural wild grassland treatment we knew that sabaigrass treatment and grass tree solid plating treatment reduced soil bulk density, enhanced soil capillary porosity, non - capillary porosity and porosity ratio, decreased soil sand grain content, enhanced soil clay grain and silt grain content so as to reduced the dispersal degree of soil, improved the aggregate capacity of soil, increased the amount of soil aggregate structure, meliorated the water permeability of soil, accelerated the form of good soil structure

    龍須草能改善紫色土的土壤結構龍須草純種植被和林草立體種植植被能不同程度地降低土壤容重，減少土壤砂粒含量，增加土壤的毛管孔隙度、非毛管孔隙度和孔隙比，以及增加粉粒含量，從而降低土壤分散度，提高土壤團聚性，增加土壤團粒結構數量，改善土壤的透水性，促進良好土壤結構的形成，最終提高土壤的蓄水保肥性能，增強土壤的抗蝕性和抗沖性。
  3. Influence of organic fertilizers on soil bulk density and porosity of purplish soil

    有機肥對紫色土容重及孔隙度的影響
  4. Effects of soil bulk density on soil physical properties and wheat growth

    不同施肥方式下紫色水稻土土壤肥力變化規律研究
  5. The result indicated that straw mulching could increase soil porosity by 2. 88 % - 5. 76 %, reduce soil bulk density by 1. 86 % - 3. 73 % and the content of soil water with straw mulching was higher than that with no straw mulching treatment ( ck1 ) at different growth stage, improve water - stable aggregate ; and increase soil organic matter, available n, available p, available k, improve soil perviousness and soil retention of water and fertilizer

    研究結果表明，與對照ck1 ，相比，秸稈覆蓋可使土壤總孔隙度增加2 . 88 % ~ 5 . 76 % ，土壤容重降低1 . 86 % ~ 3 . 73 % ，並且各生育期覆蓋處理的土城含水量均比對照高，並且秸稈覆蓋還田對促進土壤團粒結構形成具有較大作用，改善了土坡通透性和保水保肥性；同時秸稈覆蓋還田使土壤有機質、全氮、速效氮、速效磷、速效鉀得到明顯提高，從而培肥地力。
  6. ( 6 ) in agroforestry and contour hedgerow treatments, soil structure and soil texture is improved with soil bulk density decreasing and soil porosity and capillary pore increasing. finally, water - holding capacity is improved. ( 7 ) soil loss in small plots of comprehensive management treatments is significantly lower than that in control

    … ）實施農林復合經營和生物籬埂技術可明顯的改善土壤結構，降低土壤容重，增加上壤總孔隙度和毛管孔隙度，從而提高土壤的保水持水性能。
  7. Ploughing deeper and corn residues might promote formation of soil aggregated structure, decrease soil bulk density, relax solum, decrease soil porosity, raise soil permeability, improve soil structure and holding - water capability, create better soil biology condition for growth of crop, and coordinate water, fertilizer, air and heat etc. to prevent the fertility deterioration of the corn belt phaeozem and ameliorate soil, it is need to reform tillage and fertilizer application for the corn belt phaeozem in the central part of jilin

    針對吉林玉米帶黑土土壤退化現象，從黑土玉米的耕作制和施肥制的改革入手，並結合農村現有機械和技術水平，採用玉米「輕主重輔」三三耕作制和玉米「一穩二減三補」施肥技術，提出吉林玉米帶黑土土壤調控技術體系。
  8. Organic matter and available n of topsoil decreased in recreational areas, but the soil bulk density and ph increased. affected by garbage decomposing, soil available p concentration varied obviously in recreational areas

    活動區土壤有機質含量降低， ph值升高，容重增大，堿解氮含量降低，受垃圾分解影響，速效磷含量發生變化。
  9. With the construction of geographically referenced database based on second national soil general survey materials, including the data of soil profiles physical chemistry property, soil profiles depth, soil nitrogen content, soil bulk density, and the support of geographic information system, this paper systematically quantified the soil nitrogen pool

    本文以中國陸地生態系統中的土壤為研究對象，以中國較完善和精確的第二次土壤普查統計資料為基礎，在地理信息系統（ gis ）的支持下，對土壤剖面資料進行空間化，初步建立了土壤剖面數據庫。
  10. On the basis of analyzing factor ( soil particle composition, soil bulk density, water stable aggregate content, antecedent soil moisture, slope gradient, rain intensity, accumulation depth and soil crust, soil and water conservation tillage measures ) affecting soil infiltration rates, several relation models was obtained ; analyzed in detail different soil and water conservation tillage measures intensifying infiltration rates, while there have the same rainfall condition, the increasing infiltration rates of contour tillage and artificial digging and artificial hoeing in gully areas of loess plateau are 67 % and 41 % and 29 % ; the increasing infiltration rates in hilly areas of loess plateau is 45 % and 22 % and 14 %

    在相同的降雨條件下，黃土高原溝壑區等高耕作與直線坡相比，可提高入滲67 ，人工掏挖可提高入滲41 ，人工鋤耕可提高入滲29 ；黃土丘陵溝壑區等高耕作可提高入滲45 ，人工掏挖可提高入滲22 ，人工鋤耕可提高入滲14 。並根據黃土高原超滲產流的概念和水量平衡方程，建立了不同水土保持耕作措施強化入滲速率模型。
  11. Under subsurface drip irrigation, soil wetted front movement when higher soil initial moisture content was quicker than that of when it is lower, so did the supplied water pressure and soil bulk density. the wetted front movement of clay loam was clearly slow than that of sandy soil, especially in the larger soil bulk density

    地下滴灌條件下，初始含水量較高的土柱，濕潤鋒運移速度快于含水量較低的；在較高的供水壓力條件下，各個方向的濕潤鋒運移都比低水頭情況下的快；容重越大的土柱濕潤鋒運移速度越緩慢。
  12. Measurement of soil bulk density by time domain reflectometry combined with soil sampling

    時域反射儀結合土鉆法測定土壤容重
  13. The harms of soil compaction represented briefly as soil bulk density and penetration resistance increased, macroporosity decreased, soil physical, chemical and biological properties deteriorated, which effected on crop growing and soil structure degradation, and has become one of the principal obstacle factors for sustainable development of agriculture

    土壤機械壓實危害主要表現在土壤容積質量和機械阻力增加，大孔隙減少，土壤物理、化學、生物性狀惡化，進而影響作物的生長發育，土壤結構發生退化，已成為當前制約農業可持續發展的障礙因素之一。
  14. ( 2 ) the emitter discharge of simple subsurface drip irrigation is greater than the infiltration rate after formed saturate loop in the short time. infiltration rate under subsurface drip irrigation is not only affected by soil texture, original soil moisture content and soil bulk density et al, but also by emitter discharge, which affect by water pressure

    （ 2 ）地下滴灌的灌水器出流量一般在較短時間內形成飽和圈后，土壤入滲速率不僅受到土壤質地、土壤初始含水率、土壤容重等因素的制約，而且還與影響灌水器出流速率的壓力水頭有關。
  15. The data needed by the research are collected from relevant materials and field sampling, including the soil saturation hydraulic conductivity, soil bulk density, various kinds of chemical parameters of soil layer ( such as organic nitrogen, organic phosphorus and soluble phosphorus ), the transformation of organic carbon content of soil layer and the land use in 1993 etc.

    筆者兩次參加對研究區的實地考察，並進行相關數據的收集和實測，包括1993年土地利用、土壤飽和導水率、土壤容重和土壤各種化學參數（如有機氮、有機磷和可溶性磷等） ，以及后來所進行的土壤層有機碳含量的轉化等。
  16. Effects of soil bulk density on aba concentration in xylem sap and stomatal conductance of maize zea mays l. plant under different soil water conditions

    下層土壤容重對玉米根系生長及吸收活力的影響
  17. The influence of soil bulk density on wetting front is related to discharge rate

    土壤容重對滴灌濕潤體特徵值有較明顯的影響。
  18. They decrease soil bulk density, increase soil porosity and soil saturated water content. the result of straw mulch is best, plastic mulch is better. the movement of soil water in gneiss area of tai - hang mountain has following regulation

    其中以秸稈覆蓋的效果最好，其次為地膜覆蓋；太行山片麻巖區土壤水分運動有如下規律，土壤含水量隨土壤深度的增加而逐漸降低。
  19. It can be use as a parameter to describe the variety of soil texture. 3. on the basis of the a & p model, soil particle - size distributions and soil bulk density data is translated to soil water retention characteristics

    A & p模型得出的四種土壤的水分特徵曲線，在低吸力范圍段可以較好反映土壤實際的土水勢與含水量之間的關系。
  20. Spatial variation of soil bulk density in relation to terrain and land use in eroded of black soil region

    侵蝕黑土容重空間分異與地形和土地利用的關系
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