| 渝东北中山区典型土壤的系统分类 |
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| 引用本文： | 连茂山,慈恩,唐江,胡瑾,魏朝富.渝东北中山区典型土壤的系统分类[J].浙江农业学报,2018,30(10):1729. |
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| 作者姓名： | 连茂山 慈恩 唐江 胡瑾 魏朝富 |
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| 作者单位： | 1.西南大学 资源环境学院,重庆 400715;2.农业农村部西南耕地保育重点实验室,重庆 400715 |
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| 基金项目： | 国家科技基础性工作专项(2014FY110200); 中央高校基本科研业务费专项(XDJK2017B027); 西南大学科技创新“光炯”培育项目(2016001) |
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| 摘 要： | 以渝东北中山区(海拔>800 m)为研究区域,选取该区域8个典型土壤样点,通过剖面挖掘、野外观测和分层样品分析等方法,明确供试剖面的形态特征和理化性质,检索出上述典型土壤的诊断层与诊断特性,探讨其在中国土壤系统分类(CST)中的归属,并与发生分类进行参比。结果表明,在8个供试土壤剖面中,除旱地外,林地及牧草地土壤具有淡薄表层,在坡度较小和土壤侵蚀较弱的情况下土壤大都可以形成黏化层,碳酸盐岩风化物发育的土壤均符合碳酸盐岩岩性特征,海拔800 m以上土壤符合常湿润土壤水分状况。8个供试土壤剖面分别被划归3个土纲(淋溶土、雏形土、新成土),3个亚纲(常湿淋溶土、常湿雏形土、正常新成土),3个土类(钙质常湿淋溶土、钙质常湿雏形土、湿润正常新成土),5个亚类(腐殖钙质常湿淋溶土、普通钙质常湿淋溶土、腐殖钙质常湿雏形土、普通钙质常湿雏形土、石质湿润正常新成土),其中,被划归为淋溶土土纲的剖面数量最多(共4个剖面),说明该区域土壤淋溶作用明显。黄棕壤、棕壤、黄色石灰土和黑色石灰土亚类均参比到了CST的钙质常湿淋溶土土类,黄棕壤性土和山地灌丛草甸土亚类均参比到了CST的钙质常湿雏形土土类,棕壤性土亚类参比到了CST的湿润正常新成土土类。按照土族和土系的划分标准,8个供试土壤剖面建立了8个土族,划分出8个土系。
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| 关 键 词： | 重庆市 中山区 土壤系统分类 诊断层 诊断特性 |
| 收稿时间： | 2017-12-04 |
Soil taxonomy of typical soils in middle-mountain area of northeastern Chongqing |
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| LIAN Maoshan,CI En,TANG Jiang,HU Jin,WEI Chaofu.Soil taxonomy of typical soils in middle-mountain area of northeastern Chongqing[J].Acta Agriculturae Zhejiangensis,2018,30(10):1729. |
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| Authors: | LIAN Maoshan CI En TANG Jiang HU Jin WEI Chaofu |
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| Institution: | 1. College of Resources and Environment, Southwest University, Chongqing 400715, China;
2. Key Laboratory of Arable Land Conservation (Southwest China), Ministry of Agriculture and Rural Affairs, Chongqing 400715, China |
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| Abstract: | The middle-mountain area of northeastern Chongqing was selected as the study area, and 8 typical soil profiles were collected in the area. The morphological characters, physical and chemical properties of the profiles were obtained by observing soil profile in the field, sampling and analyzing soil sample in each horizon for all the test soil profiles. The attribution of the typical soils in higher taxa of Chinese Soil Taxonomy (CST) was discussed, and the references with Genetic Soil Classification of China (GSCC) were established. The results showed that forest and pasture soils had Ochric epipedon in the 8 soil profiles. When the slope was small and the soil erosion was weak, the Argic horizon could be formed in most of the test soils. The soils developed by carbonate weathering material accorded with the lithologic characters of carbonate rocks. The soils above 800 m were in accord with Perudic moisture regime. Eight typical soil profiles were sorted into three orders (Argosols, Cambosols, Primosols), three suborders (Perudic Argosols, Perudic Cambosols, Orthic Primosols), three groups (Calci-Perudic Argosols, Calci-Perudic Cambosols, Udi-Orthic Primosols), and five subgroups (Humic Calci-Perudic Argosols, Typic Calci-Perudic Argosols, Humic Calci-Perudic Cambosols, Typic Calci-Perudic Cambosols, Lithic Udi-Orthic Primosols). The number of Argosols profiles was the highest (four profiles), indicating that soil leaching was obvious in this area. The yellow brown earth, brown earth, terra gialla soil and black limestone soil subgroups in GSCC were all sorted into Calci-Perudic Argosols in CST. The yellow brown earthened soil and mountain shrubby-meadow soil subgroups in GSCC were sorted into Calci-Perudic Cambosols in CST, and the brown earthened soil subgroups in GSCC was sorted into Udi-Orthic Primosols in CST. According to the criteria of soil family and soil series in CST, eight test soil profiles were sorted into 8 soil families and 8 soil series. |
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| Keywords: | Chongqing Municipality middle-mountain area soil taxonomy diagnostic horizons diagnostic characteristics |
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