本书系统研究哈萨克斯坦北部及中部森林生态系统的特征与管理策略。第一部分探讨北哈萨克斯坦森林资源的经济利用科学基础，包括带状松林的生态特性及哈萨克丘陵地的森林类型分类。第二部分分析主要树种的生物学特性，如欧洲赤松的种内变异、西伯利亚冷杉的形态变异，以及桦树和山杨的物候特征。第三部分研究森林经营技术，包括抚育采伐对光合作用的影响、人工林密度调控，以及除草剂使用对林下植被的影响。
", "ds_source": "作者（编委会）：В. А. Алексеев（В. А.阿列克谢耶夫）\n出版社：Издательство «НАУКА» Ленинградское отделение\n出版地：列宁格勒\n出版年：1974年\n页数：180页\n语种：俄文\n馆藏条形码：XJLAS RU 70018679
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", "ds_acq_start_time": "2025-09-30 00:00:00", "ds_acq_end_time": "2025-09-30 00:00:00", "ds_acq_place": "苏联", "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": "login-access", "ds_total_size": 108100587, "ds_files_count": 1, "ds_format": "PDF格式", "ds_space_res": "无", "ds_time_res": "无", "ds_coordinate": "无", "ds_projection": "无", "ds_thumbnail": "d44f90f7-650b-4cf3-92c9-8cb08710e936.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": [ "220.25" ], "quality_level": 1, "publish_time": "2026-09-15 16:43:23", "first_publish_time": null, "last_updated": "2026-09-15 16:43:23", "protected": false, "protected_to": null, "lang": "zh", "cstr": "33110.11.ariddc.02317", "license": null, "extra": null, "files_shape": [ { "name": "202508070003（XJLASRU70018679）双层.pdf", "size": 108100587, "is_dir": false } ], "features": null, "data_level": 0, "i18n": { "en": { "title": "Forest land and tree species in northern Kazakhstan", "ds_abstract": "This book systematically studies the characteristics and management strategies of forest ecosystems in northern and central Kazakhstan. The first part discusses the scientific basis for economic utilization of forest resources in North Kazakhstan, including the ecological characteristics of belt pine forests and the classification of forest types in Kazakh hilly lands. The second part analyzes the biological characteristics of major tree species, such as intraspecific variation of Pinus sylvestris, morphological variation of Siberian fir, and phenological characteristics of birch and poplar. The third part studies forest management techniques, including the impact of tending logging on photosynthesis, plantation density regulation, and the impact of herbicide use on understory vegetation.", "ds_source": "Author (Editorial Board): Expand.А.Алексеев（В.А. Alekseyev)\r\nPublished by: 丨 зд а т е льс тво « 丨 АУ к о т д е н и нгра д с к о е о т д е л е н и е н и е\r\nPlace of publication: Leningrad\r\nPublication year: 1974\r\nPages: 180 pages\r\nLanguage: Russian\r\nCollection barcode: XJLAS RU 70018679", "ds_process_way": "This book is the collection of the Documentation and Information Center of the Xinjiang Institute of Ecology and Geography, China Academy of Sciences (hereinafter referred to as the Center). The center stores the book electronically and has been recognized by OCR. The data processing process is in accordance with the national standard \"GB/T 31219.2-2014 Specifications for Digital Processing of Library Collection Resources\" and fully complies with the data information of \"Forest Land and Tree Species in Northern Kazakhstan\" without modification or deletion.", "ds_quality": "The collected \"Forest Land and Tree Species in Northern Kazakhstan\" were electronically processed. In accordance with the requirements of the national standard \"GB/T 31219.2-2014 Code for Digital Processing of Library Collection Resources,\" the data information of \"Forest Land and Tree Species in Northern Kazakhstan\" was not changed or deleted, and the data quality was reliable.", "ds_acq_place": "Soviet Union", "ds_ref_instruction": "", "ds_ref_way": "", "ds_format": "PDF format", "ds_projection": "no", "ds_space_res": "", "ds_time_res": "" } }, "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": [ "森林生态学", "森林植被区划" ], "ds_subject_tags": [ "森林经理学" ], "ds_class_tags": [], "ds_locus_tags": [ "哈萨克苏维埃社会主义共和国" ], "ds_time_tags": [ 1974 ], "ds_contributors": [ "文献信息中心" ], "ds_meta_authors": [ "文献信息中心" ], "ds_managers": [ "文献信息中心" ], "category": "图书" }