数据来源于联合国粮农组织（FAO）和维也纳国际应用系统研究所(IIASA)所构建的世界土壤数据库(Harmonized World Soil Database version 1.1 )(HWSD). 中国境内数据源为第二次全国土地调查南京土壤所所提供的1：100万土壤数据。 该数据可为建模者提供模型输入参数,农业角度可用来研究生态农业分区,粮食安全和气候变化等。数据格式:grid栅格格式，投影为WGS84。采用的土壤分类系统主要为FAO-90。
\n\n土壤属性表主要字段包括:
\n\nSU_SYM90（FAO90土壤分类系统中土壤名称)；
\n\nSU_SYM85(FAO85分类);
\n\nT_TEXTURE(顶层土壤质地);
\n\nDRAINAGE(19.5);
\n\nREF_DEPTH(土壤参考深度);
\n\nAWC_CLASS(19.5);
\n\nAWC_CLASS(土壤有效水含量);
\n\nPHASE1: Real (土壤相位);
\n\nPHASE2: String (土壤相位)；
\n\nROOTS: String (到土壤底部存在障碍的深度分类)；
\n\nSWR: String (土壤含水量特征)；
\n\nADD_PROP: Real (土壤单元中与农业用途有关的特定土壤类型)；
\n\nT_GRAVEL: Real (碎石体积百分比)；
\n\nT_SAND: Real (沙含量)；
\n\nT_SILT: Real (淤泥含量)；
\n\nT_CLAY: Real (粘土含量)；
\n\nT_USDA_TEX: Real (USDA土壤质地分类)；
\n\nT_REF_BULK: Real (土壤容重)；
\n\nT_OC: Real (有机碳含量)；
\n\nT_PH_H2O: Real (酸碱度)
\n\nT_CEC_CLAY: Real (粘性层土壤的阳离子交换能力)；
\n\nT_CEC_SOIL: Real (土壤的阳离子交换能力)
\n\nT_BS: Real (基本饱和度)；
\n\nT_TEB: Real (交换性盐基)；
\n\nT_CACO3: Real (碳酸盐或石灰含量)
\n\nT_CASO4: Real (硫酸盐含量)；
\n\nT_ESP: Real (可交换钠盐)；
\n\nT_ECE: Real (电导率)。
\n\n其中以T_开头属性字段表示上层土壤属性（0-30cm），以S_开头属性字段表示下层土壤属性（30-100cm）。
\n\n具体属性值代表何意义请参考文件夹下说明文档.pdf及数据库.mdb。
", "ds_source": "数据来源于联合国粮农组织（FAO）和维也纳国际应用系统研究所(IIASA)所构建的世界土壤数据库(Harmonized World Soil Database version 1.1 )(HWSD). 中国境内数据源为第二次全国土地调查南京土壤所所提供的1：100万土壤数据。
", "ds_process_way": "采用的土壤分类系统主要为FAO-90
", "ds_quality": "数据集通过严格的人工审核控制质量
", "ds_acq_start_time": "2009-01-01 00:00:00", "ds_acq_end_time": "2009-12-31 00:00:00", "ds_acq_place": "中国", "ds_acq_lon_east": 135.5, "ds_acq_lat_south": 17.8, "ds_acq_lon_west": 73.2, "ds_acq_lat_north": 53.86666666666667, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "login-access", "ds_total_size": 16134120, "ds_files_count": 2, "ds_format": "ENVI Image", "ds_space_res": null, "ds_time_res": "", "ds_coordinate": "WGS84", "ds_projection": "+proj=longlat +datum=WGS84 +no_defs", "ds_thumbnail": "a948627d-4b71-4f68-b1b6-fe02e302af09.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "9c4867b1-5cb1-4de0-abeb-df42547bf41e", "ds_serv_man": "国家冰川冻土沙漠科学数据中心", "ds_serv_phone": "0931-4967592", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [ "170.4510" ], "quality_level": 3, "publish_time": "2020-12-31 15:01:14", "last_updated": "2023-08-23 16:47:02", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.Westdc.2020.585", "i18n": { "en": { "title": "Chinese soil dataset based on the World Soil Database (HWSD) (v1.1)", "ds_format": "ENVI Image", "ds_source": "The data comes from the world soil database version 1.1 (hwsd) constructed by FAO and IIASA. The data source in China is 1:1 million soil data provided by Nanjing Soil Institute of the second national land survey.
", "ds_quality": "Data set quality control through strict manual audit
", "ds_ref_way": "", "ds_abstract": "The data comes from the harmonized world soil database version 1.1 (hwsd) built by FAO and IIASA. The data source in China is 1:1 million soil data provided by Nanjing Soil Institute of the second national land survey. The data can provide input parameters for modelers, and the agricultural perspective can be used to study ecological agriculture zoning, food security and climate change. Data format: grid grid format, projection as WGS84. The main soil classification system is fao-90.
\nThe main fields of soil attribute table include:
\nSu Yu sym90 (soil name in FAO 90 soil classification system)
\nSu Yu sym85 (fao85 classification)
\nT_texture (top soil texture)
\nDRAINAGE(19.5);
\nRef? Depth (reference depth of soil)
\nAWC_CLASS(19.5);
\nAwc_class (soil available water content)
\nPhase1: real (soil phase)
\nPhase2: string (soil phase)
\nRoads: string (depth classification of obstacles to the bottom of soil)
\nSWR: string (soil moisture content characteristics)
\nAdd_prop: real (specific soil types in the soil unit related to agricultural use)
\nT_gravel: real (volume percentage of crushed stone)
\nT_sand: real (sand content)
\nT_silt: real (silt content)
\nT_clay: real (clay content)
\nT? USDA? Tex: real (USDA soil texture classification)
\nT? Ref? Bulk: real
\nT_oc: real (organic carbon content)
\nT? PH? H2O: real
\nT ﹣ CEC ﹣ clay: real
\nT? CEC? Soil: real
\nT_bs: real (basic saturation)
\nT_teb: real (exchangeable base)
\nT_caco3: real (carbonate or lime content)
\nT_caso4: real (sulfate content)
\nT_esp: real (exchangeable sodium salt)
\nT_ece: real.
\nThe attribute field beginning with t_represents the upper soil attribute (0-30cm), and the attribute field beginning with s_represents the lower soil attribute (30-100cm).
\nPlease refer to the description document < EM >. PDF and database < / EM >. MDB under the folder for the meaning of specific attribute values.
", "ds_time_res": "", "ds_acq_place": "China", "ds_space_res": "", "ds_projection": "+proj=longlat +datum=WGS84 +no_defs", "ds_process_way": "The main soil classification system used is fao-90
", "ds_ref_instruction": "" } }, "submit_center_id": "ncdc", "data_level": 0, "recommendation_value": 0, "license_type": "https://creativecommons.org/licenses/by/4.0/", "doi_reg_from": "reg_local", "cstr_reg_from": "reg_local", "doi_not_reg_reason": null, "cstr_not_reg_reason": null, "is_paper_in_submitting": false, "belong_to_nieer": false, "ds_topic_tags": [ "碎石体积", "HWSD", "土壤质地", "土壤", "土壤含水量", "有机碳含量" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "中国" ], "ds_time_tags": [ 2009 ], "ds_contributors": [ { "true_name": "卢玲", "email": "luling@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" }, { "true_name": "刘超", "email": "lc287@126.com", "work_for": "中国科学院西北生态环境资源研究院", "country": "" } ], "ds_meta_authors": [ { "true_name": "吴立宗", "email": "wulizong@pric.org.cn", "work_for": "国家极地科学数据中心", "country": "中国" } ], "ds_managers": [ { "true_name": "卢玲", "email": "luling@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" } ], "category": "基础地理" }