本数据集利用LI-6400光合仪，观测了黑河流域中游绿洲区的主要农作物小麦和玉米。观测地点分别位于临泽平川和小满五星村超级站。观测日期从五月中旬开始到九月份。本数据集包括观测期内的小麦和玉米的LI-6400的原始观测数据和预处理后的数据。
\n1）测量目的\n
\n光合数据测量可以用于植物生理生态特性研究以及生态水文模型的模拟和验证。
\n2）测量仪器与原理\n
\n测量仪器：LI-6400便携式光合作用测量仪。\n
\n测量原理：利用红外气体分析法来测量CO2浓度变化，通过测量样品室和参比室之间CO2的浓度差从而获得叶片的净生产力。\n
\n3）测量时间与地点\n
\n小麦观测地点：临泽平川小麦试验场\n
\n观测时间：2012-05-17，2012-06-08至6-13日\n
\n玉米观测地点：五星村超级站\n
\n观测时间：2012-05-19至2012-09-15\n
\n4）数据处理\n
\nLI-6400原始文件是文本格式的文件，经过格式转换为excel格式的文件。为保留原始数据，未对数据进行删改。测量时每个时段数据存为一个文件，并以日期+类型+时刻命名，每片叶子重复读数3次；每片叶子添加一个remark。
", "ds_source": "观测地点分别位于临泽平川和小满五星村超级站。观测日期从五月中旬开始到九月份。本数据集包括观测期内的小麦和玉米的LI-6400的原始观测数据和预处理后的数据。
", "ds_process_way": "测量仪器：LI-6400便携式光合作用测量仪。
\n测量原理：利用红外气体分析法来测量CO2浓度变化，通过测量样品室和参比室之间CO2的浓度差从而获得叶片的净生产力。
", "ds_quality": "数据质量良好
", "ds_acq_start_time": "2012-05-30 00:00:00", "ds_acq_end_time": "2012-09-28 00:00:00", "ds_acq_place": "黑河流域, 中游人工绿洲试验区, 临泽平川镇, 大满超级站", "ds_acq_lon_east": 100.37194444444444, "ds_acq_lat_south": 38.85444444444445, "ds_acq_lon_west": 100.37166666666666, "ds_acq_lat_north": 38.85472222222222, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "apply-access", "ds_total_size": 14134960, "ds_files_count": 2, "ds_format": "excel", "ds_space_res": null, "ds_time_res": "日", "ds_coordinate": "WGS84", "ds_projection": "", "ds_thumbnail": "cf7f7b44-774d-4af9-a010-603631c23220.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "本数据由“黑河生态水文遥感试验（HiWATER）”产生，用户在使用数据时请在正文中明确声明数据的来源，并在参考文献部分引用本元数据提供的引用方式。", "ds_from_station": null, "organization_id": "c94b3578-20da-4346-9de9-c702b6ca8983", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596 ", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": null, "quality_level": 3, "publish_time": "2021-08-31 08:48:46", "last_updated": "2023-08-23 16:47:38", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.NIEER.2021.1844", "i18n": { "en": { "title": "Heihe River eco hydrological remote sensing experiment: Li-6400 photosynthetic observation data set in the middle reaches of Heihe River Basin (2012)", "ds_format": "", "ds_source": "The observation sites are located in Pingchuan, Linze and Wuxing village, Xiaoman respectively. The observation date starts from mid May to September. This data set includes the original observation data and preprocessed data of Li-6400 for wheat and maize during the observation period", "ds_quality": "
Good data quality
", "ds_ref_way": "", "ds_abstract": "In this data set, Li-6400 photosynthetic instrument was used to observe the main crops wheat and corn in the oasis area in the middle reaches of Heihe River Basin. The observation sites are located in Pingchuan, Linze and Wuxing village, Xiaoman respectively. The observation date starts from mid May to September. This data set includes the original observation data and preprocessed data of Li-6400 for wheat and maize during the observation period.\n
\n1) Measurement purpose\n
\nPhotosynthetic data measurement can be used for the study of plant physiological and ecological characteristics and the simulation and verification of eco hydrological models.\n
\n2) Measuring instrument and principle\n
\nMeasuring instrument: Li-6400 portable photosynthesis measuring instrument.\n
\nMeasurement principle: the change of CO2 concentration is measured by infrared gas analysis method, and the net productivity of leaves is obtained by measuring the CO2 concentration difference between sample chamber and reference chamber.\n
\n3) Measurement time and place\n
\nWheat observation site: Linze Pingchuan wheat experimental field\n
\nObservation time: May 17, 2012 June 8, 2012 to June 13, 2012\n
\nCorn observation site: Wuxing village super station\n
\nObservation time: May 19, 2012 to September 15, 2012\n
\n4) Data processing\n
\nLi-6400 original file is a file in text format, which is converted into excel format. In order to retain the original data, the data is not deleted. During measurement, the data of each period is saved as a file and named after date + type + time, and each leaf is read repeatedly for 3 times; Add a remark to each leaf
", "ds_time_res": "日", "ds_acq_place": "Heihe River Basin, pilot area of artificial oasis in the middle reaches, Pingchuan Town, Linze, Daman super station", "ds_space_res": "", "ds_projection": "", "ds_process_way": "Measuring instrument: Li-6400 portable photosynthesis measuring instrument\n
Measurement principle: the change of CO2 concentration is measured by infrared gas analysis method, and the net productivity of leaves is obtained by measuring the CO2 concentration difference between sample chamber and reference chamber", "ds_ref_instruction": " \nThis data is generated by \"Heihe eco hydrological remote sensing experiment (hiwater)\". When using the data, users should clearly state the source of the data in the text and quote the reference method provided by this metadata in the reference part." } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "CC 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, "ds_topic_tags": [ "碳循环", "地面同步观测", "蒸散发", "光合有效辐射", "LI-6400光合仪", "植被" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "大满超级站", "临泽平川镇", "黑河流域", "中游人工绿洲试验区" ], "ds_time_tags": [ 2012 ], "ds_contributors": [ { "true_name": "马明国", "email": "mmg@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": "王海波", "email": "wanghaibokm@163.com", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "王海波", "email": "wanghaibokm@163.com", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" } ], "ds_managers": [ { "true_name": "马明国", "email": "mmg@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": "遥感及产品" }