本数据集是2018年塔吉克斯坦17个退化和封育草地典型样点的草地植物高度、盖度和地上生物量观测数据。\n2018年4月，中国科学院新疆生态与地理研究所科研人员赴塔吉克斯坦南部、中部和中东部选取了17个退化和封育草地典型样点，随机布设1m×1m样方进行植物调查取样，再经过实验室分析处理，获得的草地植物高度、盖度和地上生物量数据。
", "ds_source": "数据来源于2018年4月在塔吉克斯坦中部、南部、中东部地区开展的野外草地调查采样.
", "ds_process_way": "1） 数据采集方法：2018年4月，中国科学院新疆生态与地理研究所科研人员赴塔吉克斯坦南部、中部和中东部，对冬春、夏秋牧场的植物组成、生产力、土壤养分、土壤微生物等开展系统调查和取样，并通过家庭问卷调查方式详细了解了牲畜的组成特点和数量、放牧方式、家庭收入、草原保护认识等方面的情况，根据调查结果综合考虑选取了17个典型退化和封育草地样点，随机布设1m×1m样方进行植物和土壤调查取样。\n2） 草地植物群落种类组成分析方法：用目测法测定植被物种的盖度，选取同一株植物的最高植株和最矮植株，用卷尺从距离地面1-2cm的单株植物根部量起至植物顶端最高处量测植物高度，记录植物的最高高度和最低高度； \n3） 草地地上生物量分析方法：收取小样方内植物地上部分（距离地面1-2cm的根部以上部分），称其鲜重并记录，然后带回实验室，鲜草于烘箱内65 ℃恒温烘干48 h以上，直至重量不在变化，此时称干重，并计算其为地上干重生物量。
", "ds_quality": "数据采集加工处理记录依据《全国生态状况调查评估技术规范——草地生态系统野外观测》（HJ 1168-2021）。从样点选择、样地设置、调查前期准备、调查取样、室内分析，整个过程对数据质量进行控制。\n调查前的数据质量控制：通过认真分析草地退化的情况，筛选出17个有代表性的典型草地生态系统。同时，制定系统的调查采样规范方案，并以此方案为基础，对所有参与野外调查采样的人员进行技术培训，尽可能地降低人为误差。\n调查采样中的数据质量控制：土壤样品的采集，参照土壤样品采集规范进行，注意标清样品的编号，便于实验室内的样品预处理和分析测试工作。调查人员在完成各小样方调查后，立即核查原始记录数据，以便及时更正有问题的数据。野外调查完成后，调查人员和记录人员进一步核查已经完成的样方数据，并补充相关信息；纸质版数据录入计算机后再次检查，并妥善保存纸质资料。\n室内分析测试及测试结束后的数据质量控制：土壤样品带回实验室后，迅速完成样品的预处理工作。然后根据实验进度安排，参照标准的分析方法，按时按质完成样品的测试工作。每项指标测试结束后，及时将实验数据录入计算机，同时检查是否有异常值。整理完毕的数据集，先由实验人员自查一遍，再交付给专家进行最终的审核和修订，确保数据集的真实、可靠。
", "ds_acq_start_time": "2018-04-30 00:00:00", "ds_acq_end_time": "2018-04-30 00:00:00", "ds_acq_place": "塔吉克斯坦中部、南部、中东部地区", "ds_acq_lon_east": null, "ds_acq_lat_south": null, "ds_acq_lon_west": null, "ds_acq_lat_north": null, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "apply-access", "ds_total_size": 29778, "ds_files_count": 2, "ds_format": "xls", "ds_space_res": "无", "ds_time_res": "无", "ds_coordinate": "无", "ds_projection": "无", "ds_thumbnail": "90f382c8-897c-4c70-b08c-19eb91264e9b.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "a5877b42-96ea-4f13-af7e-246f355413d6", "doi_value": "", "subject_codes": [ "170.45" ], "quality_level": 1, "publish_time": "2025-03-06 16:02:52", "first_publish_time": null, "last_updated": "2025-05-27 19:01:07", "protected": false, "protected_to": null, "lang": "zh", "cstr": "33110.11.ariddc.00304", "license": null, "extra": null, "files_shape": [ { "name": "Data", "size": null, "is_dir": true } ], "features": null, "data_level": 0, "i18n": { "en": { "title": "Observation dataset of grassland biological elements from typical sample sites in Tajikistan in 2018", "ds_abstract": "This dataset is the observation data of grassland plant height, coverage and above-ground biomass from 17 typical sample sites in degraded and closed grasslands in Tajikistan in 2018.\nIn April 2018, scientific researchers from the Xinjiang Institute of Ecology and Geography of China Academy of Sciences went to southern, central and central and eastern Tajikistan to select 17 typical sample sites of degraded and enclosed grasslands, and randomly arranged 1m×1m sample squares for plant investigation and sampling, and then analyzed and processed in the laboratory to obtain grassland plant height, coverage and above-ground biomass data.
", "ds_source": "The data comes from field grassland surveys conducted in central, southern, and central and eastern Tajikistan in April 2018.
", "ds_process_way": "1) Data collection method: In April 2018, scientific researchers from the Xinjiang Institute of Ecology and Geography of China Academy of Sciences went to southern, central and central and eastern Tajikistan to conduct systematic surveys and samples on the plant composition, productivity, soil nutrients, soil microorganisms, etc. of the winter, spring, summer and autumn pastures. Through family questionnaire surveys, we learned in detail the composition characteristics and quantity of livestock, grazing methods, family income, grassland protection awareness, etc. Based on comprehensive consideration of the survey results, 17 typical degraded and enclosed grassland sample sites were selected, and a 1m×1m sample square was randomly arranged for plant and soil survey and sampling.\n2) Species composition analysis method of grassland plant community: Measure the coverage of vegetation species by visual inspection, select the tallest plant and shortest plant of the same plant, and use a tape measure to measure the height of the plant from the root of a single plant 1- 2 cm away from the ground to the highest point at the top of the plant. Measure the height of the plant, and record the highest and lowest heights of the plant; \n3) Grassland above-ground biomass analysis method: Collect the above-ground parts of the plants in the small sample square (the parts above the roots 1- 2 cm from the ground), weigh and record their fresh weight, and then take them back to the laboratory. The fresh grass is dried at a constant temperature of 65 ℃ in an oven for more than 48 hours until the weight does not change. At this time, the dry weight is weighed and calculated as the above-ground dry weight biomass.
", "ds_quality": "Data collection, processing and processing records are based on the \"National Technical Specifications for Survey and Evaluation of Ecological Status-Field Observation of Grassland Ecosystem\"(HJ 1168-2021). From sample point selection, sample site setting, preliminary preparation for survey, survey sampling, and indoor analysis, the data quality is controlled throughout the process.\nData quality control before investigation: Through careful analysis of grassland degradation, 17 representative typical grassland ecosystems were selected. At the same time, a systematic survey and sampling specification plan was formulated, and based on this plan, technical training was provided to all personnel involved in field survey and sampling to reduce human error as much as possible.\nData quality control during investigation and sampling: The collection of soil samples shall be carried out in accordance with the soil sample collection specifications, and attention shall be paid to the numbering of standard clear samples to facilitate sample pretreatment and analysis and testing in the laboratory. After completing the investigation of each sample party, investigators immediately checked the original recorded data so that problematic data could be corrected in a timely manner. After the field investigation is completed, investigators and recorders further check the completed sample data and supplement relevant information; the paper version of the data is entered into the computer and then checked again, and the paper data is properly preserved.\nIndoor analytical testing and post-test data quality control: After the soil samples are brought back to the laboratory, the pretreatment of the samples is quickly completed. Then, according to the experimental schedule and referring to standard analysis methods, the sample testing work is completed on time and with quality. After the test of each indicator is completed, the experimental data will be entered into the computer in time, and at the same time, it will be checked for abnormal values. The compiled data set is first self-checked by the experimenter and then delivered to the experts for final review and revision to ensure the authenticity and reliability of the data set.
", "ds_acq_place": "Central, southern and central eastern Tajikistan", "ds_format": "xls", "ds_projection": "no", "ds_space_res": "no", "ds_time_res": "no" } }, "license_type": null, "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, "ds_topic_tags": [ "盖度", "样方", "生物量", "高度" ], "ds_subject_tags": [ "地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "塔吉克斯坦" ], "ds_time_tags": [ 2018 ], "ds_contributors": [ "范连连", "李耀明" ], "ds_meta_authors": [ "李锦" ], "ds_managers": [ "范连连" ], "category": "生态环境" }