P - pedogenesis 中文 - EN166

pedogenesis n.【地質學；地理學】成土作用。-genic, -gen...

pedologic
This paper summarized the disturbance effect of rodents on soil ( pedogenesis , patch formation , and physical and chemical properties ) and vegetation ( species diversity , productivity , and seed dispersion ) , aimed to illustrate the contributions of rodents activities to desert ecosystem 本文主要從鼠類活動對土壤（包括土壤發生過程、土壤斑塊的形成、土壤理化性質）和植物群落（包括物種多樣性、生產力、植物種子）的擾動效應做了歸納總結，旨在闡明鼠類在荒漠生態系統中的作用。
Firstly , evidence from depositional pattern suggests that the hsl has experienced an expansion - contraction circle since the late glacial epoch . the expansion and movement of the hsl or desert in early stage were clearly marked by the presence of paleo - aeoline sands . the occurrence of paleosoal characterized the stabilization and contraction of the hsl and also indicated the activity of pedogenesis on the paleo - aeilian sands 通過系列氣候代用指標的分析，首次發現該地區粒度、磁化率指標值在兩個大的峰值之間有多個小的峰谷出現，表明了在大的氣候變化階段次一級的暖濕?干冷氣候波動，值的進一步做年齡的小尺度高分辨率研究。
The main results are following : ( 1 ) the variation of clay / silt ratio can indicate the secondary clay action of dust depositions ; the variations of magnetic susceptibility and total fe content are inferred to be records of the changeable intensity of bio - pedogenesis ; the variations of sr content and rb / sr ratio can indicate bio - pedogenesis , dissolving and leaching action ; the content of total organic carbon ( toc ) can reflect variation of climate and vegetation during soil formation , it indicates the intensity of weathering and bio - pedogenesis ; the content variation of caco3 can show the intensity of dissolving - leaching action and secondary deposit , which was noted as pseudomycilia in pores and fissures in the sediment , so it can indicate the intensity bio - pedogenesis quite well . these proxy indexes also reflect obvious regional difference of pedogenic environment and the intensity bio - pedogenesis ; namely , secondary clay action , dissolving - leaching action and bio - pedogenesis are all much stronger in south than that in north 實驗結果表明：粘粒粉沙比值能很好地指示粉塵堆積物的次生粘化作用；磁化率和全鐵很好地指示生物風化成壤作用； sr和rb sr比值能很好的指示生物風化成壤作用和淋溶作用；總有機碳( toc )含量的高低，在一定程度上反應了土壤發育過程中氣候和植被狀況的變化，指示著成壤過程中腐殖質化的程度； caco3含量的變化，可以反映了黃土古土壤形成時的風化成壤作用的強弱程度，指示成壤過程中的淋溶作用和次生碳酸鹽化作用；并且各指標所指示的成壤環境和成壤強度存在明顯的區域差異，即渭河流域土壤的生物風化成壤作用、次生粘化作用和淋溶作用均表現出南部強于北部。
Setenaly according to the analyses from selected profiles , we know that , it is cold and dry in this region during the early holocene when east asian winter monsoon ' s influence is obvious , so , it is a transition period from sand deposit to sandy soil deposit , when the layers become thinner gradually from north to south . during middle holocene , it is warm and humid , influenced evidently by east asian summer monsoon , so , it is an obivious pedogenesis , when there are generally well - developped holecene palaeosol ( so ) from north to south , and the pedogenesis in the south is better than that in the north , the soil is also thicker than that of the north . from late holocene to now , the climate changes to be dry and cold , but its changing scope is smaller than that of last glacial period 2 、就所選剖面分析來看，本區在全新世早期氣候回返，相對較寒冷干燥，東亞冬季風影響較明顯，此時為沙層堆積向砂質土壤過渡，自北至南堆積的沙粒漸細；全新世中期氣候溫暖濕潤，東亞夏季風影響顯著，此時為明顯的成壤期，表現在自北至南普遍可見發育較好的黑壚土層，且南部的成壤作用比北部好，土壤的厚度也要大；全新世晚期至今，氣候向干冷方向轉化，但變化幅度遠小于末次冰期。
Evidence of the early stage weathering pedogenesis by carbonate rock 碳酸鹽巖早期風化成土作用的證據