粗粒土壤 的英文怎麼說
中文拼音 [cūlìtǔrǎng]
粗粒土壤
英文
soil coarse grained-
The organic matter, total n, hydrolytic n were increased, then reduced with the increase of abandoned time. the loss of organic c got up to 59. 4 % in abandoned land. in 0 - 20cm, the sand content of 0. 25 - 0. 05mm was increased gradually, the average content of sand in the abandoned land was up to 76. 84 %, the sand contents of silt and sand was gradually reduced, the soil mechanic compose became coarse
隨撂荒年限的增加,土壤有機質、全氮、堿解氮等主要養分均表現出先降低后增加的趨勢;撂荒地有機碳的損失平均達到59 . 4 ;在撂荒地表面0 - 20cm范圍內, 0 . 25 - 0 . 05mm粒徑的砂粒含量逐漸增加,各撂荒地砂粒平均含量達76 . 84 ,粉粒和粘粒含量逐漸降低,土壤機械組成出現粗化現象。The bulk density was 1. 2 g cm - 1. the soil contents about 60 % of silts and about 15 % of clays. a slope adjustable flume of 3 by 8 m was subdivided into 15 mini - flumes of 0. 2 by 8 m
土壤顆粒以粉沙為主,粉沙粒占總量的60左右,粘粒約佔15左右,容重約為1 . 2gcm ~ ( - 1 ) ,試驗前將土樣風干並過1 1cm的粗篩。The research showed that pam could improve soil structure, and greatly increase the stabilization of soil aggregates, so soil crust development would be decreased. fifthly, soil grain that controls rainfall splash erosion was obtained, the influence of soil clay was very great during initial stages of rainfall. with rainfall going on, soil coarse sand and fine sand would control the splash erosion
五、控制土壤濺蝕的主要土壤粒級:在降雨初期土壤的的粘粒對濺蝕速率的影響較大,隨著降雨歷時的延長,土壤中的細砂和粗砂成為濺蝕速率影響較大的因子;六、對土壤濺蝕影響較大的土壤結構特徵因子:降雨5分鐘時,土壤的滲透系數對濺蝕速率的影響較大,隨著降雨的繼續進行,土壤的團聚度一直對土壤濺蝕速率影響較大。Finally, the surface sands of the hsl are coarser at the present day than the past and the desertification of the land is currently rather rigorous
5 ,渾善達克沙地的沙漠化發展形勢嚴峻,目前有加速惡化的趨勢,表現為地表土壤嚴重粗粒化。The data collected in this study indicates that the paleosol layer is thicker in the southeast region than in the northwest and thicker in the north region than in the south
通過各項指標區域橫向對比發現,砂質古土壤層具有從西北向東南漸變厚變深的規律和粒度值從西北向東南由粗變細的規律。Standard test method for capillary - moisture relationships for coarse - and medium - textured soils by porous - plate apparatus
用多孔板儀器測量粗粒和中等結構土壤的毛細管與水份關系的標準試驗方法It puts forward to differentiate the coarse and fine sand and then measure the sediment yield of total precipitation erosion by using the combined method of drying and pycnometer in the light of the soil mixed with large quantity of coarser sand in the model tests
針對模型土壤中夾雜著大量粒徑較粗的泥沙顆粒的試驗,提出進行泥沙粗細分層,然後採用烘乾法和密度瓶法相結合的方法來測量次降雨侵蝕產沙量。分享友人