chemical characteristics of soils 中文意思是什麼

chemical characteristics of soils 解釋
土壤的化學特性
  • chemical : adj 化學的，化學作用的；應用化學的，用化學方法獲得的。n 〈常 pl 〉化學製品；藥品。 fine chemicals...
  • characteristics : 產品性能描述
  • of : OF ＝Old French 古法語。
  • soils : 土壤
  1. The results indicate that : 1. the main physical and chemical characteristics vary regularly : with rising of the altitude, there is a transition from silt > sand > clay to sand > silt > clay in the mechanical composition ; the argic horizon emerges below the altitude of 1600 meters ; the content of organic matter is enrichment, the content of organic carbon of epipedon is higher than 20 g / kg, while the content of organic carbon increases with increasing of altitude, and in the altitude of 3500 - 3700meters, the soils under the meadow have the maximum content organic carbon ; the soils appear acid - slightly acid reaction, the ph decreases appreciably and acid strengthen with increasing of altitude ; the soils higher than the altitude of 2500 meters are base unsaturated, indicating the soil leaching is strong, the ph and bs are distinct plus correlated ; the contents of sio2, al2o3, and fe2o3 of the soil body and clay are all relatively stabilization ; in the soil body, the content of sio2 is much high and cao is very little, the total contents of sio2, a12o3 and fe2o3 occupy 92 % of the mineral parts, the sequence of mineral elements is : sio2 > al2o3 > fe2o3 > k2o > mgo > cao > tio2 > mno

    研究結果表明： 1太白山南坡土壤的主要理化性質隨海拔高度的上升呈有規律的變化：隨海拔高度上升，機械組成由粉粒砂粒粘粒逐漸過渡到砂粒粉粒粘粒，海拔1600m以下出現粘化層；土壤有機質豐富，表層有機碳含量一般在20g kg以上，有機碳含量隨海拔高度升高而相應增加，海拔3500 3700m的灌叢草甸植被下有機碳含量最高；土壤呈酸性或微酸性，並隨海拔上升， ph值略微降低，酸性增強，海拔2700m以上的土壤多呈鹽基不飽和狀態，表明土壤淋溶作用較強， ph值和鹽基飽和度呈極顯著正相關；土體與粘粒中的sio _ 2 、 al _ 2o _ 3 、 fe _ 2o _ 3含量相對比較穩定，土體中sio _ 2含量較高， cao含量較少， sio _ 2 、 al _ 2o _ 3和fe _ 2o _ 3含量之和約占土壤礦質部分的92 ，礦質元素含量的順序依次為： sio _ 2 al _ 2o _ 3 fe _ 2o _ 3 k _ 2o mgo cao tio _ 2 mno 。
  2. Mineral composition and chemical characteristics of albic soils in jianghuai drainage basin

    江淮流域白漿化土壤的礦物組成與化學特性的研究
  3. The releasing characteristics and availability of nonexchangeable k in cultivated soils were studied by two chemical successive extraction and pot exhaustion

    採用2種化學連續提取法及連續耗鉀實驗，研究了幾種耕作土壤非交換性鉀釋放特性及有效性。
  4. Abstract : by analysis on the physical and chemical properties of rhizosphere and nonrhizosphere soils of zanthoxylum bungeanum with soil and water conservation economic benefits in karst valley of guizhou province, the soil characteristics suiting zanthoxylum bungeanum growth well was studied, and some major technical measures of developing zanthoxylum bungeanum production has been put foward

    文摘:測定了貴州喀斯特峽谷水保經濟植物花椒根際和非根際土壤的理化性質；探討了適宜花椒生長的土壤特性；提出了發展花椒生產的主要技術措施。
  5. Fourteen typical profiles of different altitude on the south slope of the taibai peak of qinling mountaint, which is 3767 meters in altitude, were researched in this study. by field survey, the physical and chemical characteristics anasysis of the soils, we studied thoroughly the soil genetic, discussed the positions in taxonomic classification and the distribution of the soils on the basis of the keys to chinese soil taxonomy ( 3rd edition ), and to provide the foundation of soil taxonomy of mountain and resources development

    本研究以海拔3767m的秦嶺主峰太白山南坡不同海拔高度的14個典型土壤剖面為研究對象，通過野外調查、室內理化性質分析，研究了土壤的發生特性，以《中國土壤系統分類檢索（第三版） 》為依據，確定了其在系統分類中的地位和分佈界線。旨在為山地土壤系統分類和土壤資源開發利用提供依據。
  6. Clay minerals and surface chemical characteristics of soils developed under a palaeosol in lower west mountain area of beijing

    北京西山古土壤母質上發育的土壤之粘粒礦物與表面化學特性
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