Results 11 to 20 of about 62 (48)

山西芦芽山保护区楔尾伯劳的生态习性研究

open access: yes野生动物学报, 2012
楔尾伯劳为食虫益鸟,被列为山西省重点保护鸟类。2008~2010年3~9月对山西芦芽山自然保护区的楔尾伯劳的生态习性进行了研究。结果表明:楔尾伯劳在本地区为夏候鸟。最早迁来本区日期为3月22日,最晚迁离本区日期为9月22日,居留期179~181 d,且每年迁徙日期相对稳定。种群密度为0.39只/km,在油松、辽东栎、山杨针阔混交林带种群数量最多为0.5只/km,在村边农田地带种群数量较少为0.25只/km。繁殖期4~6月,巢多筑于针阔混交林隐蔽条件较好的地带,年繁殖1窝,4月下旬开始筑巢,5月初产卵 ...
吴丽荣
doaj   +2 more sources

山西芦芽山自然保护区四声杜鹃的生态习性观察

open access: yes野生动物学报, 2012
2009~2011年5~8月,在山西芦芽山国家级自然保护区对四声杜鹃的生态习性进行了观察。结果表明,四声杜鹃在本区为夏候鸟,最早5月上旬迁来,最晚8月下旬迁走,居留期为99~111 d。迁来后,该鸟在本区主要在低山疏林地带和村庄附近活动,活动较为敏锐和隐蔽,常能听到叫声,但很少暴露在人前。四声杜鹃在本区的种群密度6、7月最大,每公里遇见数分别为1.17只和1.25只;在8月种群密度最小,每公里遇见数0.47只,种群密度平均为0.89只/km。该鸟为卵寄生性繁殖,自己不营巢 ...
王建萍
doaj   +2 more sources

山西芦芽山自然保护区岩燕的迁徙和繁殖研究

open access: yes野生动物学报, 2014
2010~2012年4~11月,在山西芦芽山自然保护区对岩燕种群的迁徙、繁殖和生活习性进行了观察研究。结果表明:岩燕在本区为夏候鸟,最早迁入本区为4月28日,最晚迁出为11月2日。岩燕在本区的季节迁徙年间相差2~3 d,居留期相对稳定。繁殖前遇见率为1.5只/km,繁殖后遇见率为2.1只/km。繁殖期为5~7月,最早营巢期为5月17日,大量岩燕的营巢时间为5月下旬。巢营于临近河流、湿地附近的岩壁和土崖洞穴中。雌雄鸟共同营巢,营巢期8~9 d。巢呈碗状,以少量细草茎叶为框架,由大量苔藓、地衣 ...
赵爱生
doaj   +1 more source

Thermal and mechanical properties of fracture-filled granite with different structural forms under high temperature and high pressure [PDF]

open access: yes
The reservoir of deep hot dry rock (HDR) geothermal energy is not intact rock mass, which includes a large number of fractures induced by geological tectonic movement. The tectonic fractures are subsequently filled by hydrothermal fluid.
Weitao YIN, Zijun FENG
core   +1 more source

Chemical Constituents and Digestion-Promoting Effect of Maojian Green Tea [PDF]

open access: yes
In this study, the digestion-promoting function of an aqueous extract from Maojian green tea extract (MJ-GTE) was evaluated by small intestinal motility in mice as well as body mass, body mass gain, food intake, food utilization rate, gastric pepsin ...
GAO Jianjian, ZHOU Zhengyang, SONG Yanhua, YU Shuai, LU Wei, LIN Zhi, DAI Weidong
core   +1 more source

Research Progress on the Effect of Dissolved Organic Matter on the Environmental Behavior of Cadmium in Environmental Remediation [PDF]

open access: yes
With the rapid development of the economy and society and the continuous emission of cadmium (Cd), Cd pollution has become a major environmental problem faced by China and the rest of the world.
Bo WANG   +8 more
core   +1 more source

芦芽山自然保护区生物多样性概述

open access: yes野生动物学报, 2007
山西芦芽山国家级自然保护区地处山西省吕梁山脉北端,目前已查明保护区内有高等植物4门102科954种;脊椎动物26目68科300种;其中鸟类有17目47科248种,兽类有6目15科41种,两栖爬行类有3目6科11种,真菌种类有9目26科75种;是华北地区有重要科学研究价值和保护价值的生物物种基因库。
郭建荣
doaj  

山西芦芽山自然保护区斑翅山鹑的生态研究

open access: yes野生动物学报, 2014
2011~2013年3~9月,在山西芦芽山自然保护区对斑翅山鹑的繁殖习性进行了观察研究,结果表明:本区斑翅山鹑为留鸟,在海拔1 400~1 480 m的低山丘陵灌草带种群数量居多,在海拔1 600~1 700 m的低山疏林灌丛带较少,海拔1 700 m以上的地区没有该鸟活动。繁殖前3月的种群平均密度为0.15只/hm2,繁殖后的9月种群平均密度为0.25只/hm2。3月末至6月进入繁殖期,年繁殖1次,1雄1雌制; 雌雄共同营巢,营巢期6~7 d; 窝卵数13~15枚,雌鸡孵卵,孵化期23~24 d ...
王建萍
doaj  

[Chinese consensus on diagnosis and treatment of bronchiolitis obliterans syndrome after hematopoietic stem cell transplantation (2022)]. [PDF]

open access: yesZhonghua Xue Ye Xue Za Zhi, 2022
China Hematology Association   +3 more
europepmc   +1 more source

Home - About - Disclaimer - Privacy