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近几年来,辽宁本溪、阜新、铁岭、海城等十几个市、县的部分落叶松、油松、杨树、刺槐等人工纯林内,先后挂了三万余个木板巢箱、油毡纸巢、招引木段,招引进大山雀、白眉勜、沼泽山雀、杂色山雀、北椋 相似文献
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鸟类是大自然的重要组成部分,是人类的朋友。保护和招引益鸟,是防治森林害虫的有效措施。鸟类能够捕食森林害虫,特别是在育雏期间,捕食量更大。挂置人工鸟箱,能够为鸟类的栖息和繁殖创造优越条件,有利增加林中益鸟数量,消灭害虫。我局在森林保护工作中贯乇“予防为主、积极消灭”的方针。从一九八二年春季开始,在长安、响水、柳树河、永太、石砬、梨花、桃源、上营、正阴、马鞍山十个林场的二十五个林班,面积为六千余亩的落叶松人工林内,悬挂近四百个人工鸟箱,经调查,绝大部分都已有鸟做巢,主要鸟类有大山雀、小山雀、沼泽山雀、灰喜鹊、啄木鸟、杜鹃等。在一年的时间内,就收到了较为明显的治虫效果,在悬挂人工鸟箱的林分,松毛虫有虫株率只有19.4%。 相似文献
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人工巢箱招引森林益鸟防治马尾松毛虫试验王友玉,杨造林,郁盛万,芮一鸣(溧水县林场,211219)鸟类能捕食害虫的卵、幼虫、蛹、成虫,对维护自然界的生态平衡具有重要意义。为了增加林间鸟类的种群数量,从1985年开始,我们研制了大山雀巢箱,挂放林区,进行... 相似文献
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大山雀对油毡巢箱的利用率及适宜性的研究 总被引:3,自引:0,他引:3
本文介绍了油毡巢箱制做方法并从大山雀的平均窝卵数及雏鸟存活率等方面,讨论了油毡巢箱招引大山雀的适宜性。不同巢箱密度的实验表明,产卵巢箱分布与巢箱安置方式基本一致,并向均匀分布方向偏离随机分布(R=1.1—1.4)。产卵巢箱密度与巢箱密度之间相关性不显著(r=0.30,P<0.05),巢箱距离以30—50m为宜,巢箱过密不能增加招引鸟的数量。 相似文献
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大山雀(华北亚种)Parus major ara-rtatus Thayer et Bongs又名白脸山雀,是重要的森林益鸟,其数量较多,分布较广。为了给引鸟治虫提供科学依据,笔者于1981—83年,在清原县甘井子林场庙沟,进行了不同巢箱和种类招引试验,并对大山雀的繁殖与食性进行了定位观察。 相似文献
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Daxing'an Mountains was one of the most important forest areas in China, but it was also an area which was prone to suffering
forest fire. The catastrophic forest fire that occurred in Daxing'an Mountains on May 6, 1987 devastated more than 1.33×106 hm2 of natural forests, which leaded to the formation of some mosaic areas with different burn intensities. Two forest farms
of Tuqiang Forest Bureau (124°05′–122°18′E, 53°34′–52°15′N) were chosen as a typical area to analyze the post-fire landscape
change by drawing and comparing the two digital forest stand maps of 1987 and 2000. The landscape lands of forest were classified
into 12 types: coniferous forest, broadleaf forest, needle-broadleaf mixed forest, shrub, nursery, harvested area, burned
blanks, agricultural land, swamp, water, built-up, grass. The results showed that: 1) The burned blanks was almost restored,
some of them mainly converted into broadleaf forest land during the process of natural restoration, and coniferous forest
land by the artificial reforestation, and the others almost changed into swamp or grass land; 2) The proportion of forest
area increased from 47.6% in 1987 to 81.3% in 2002. Therefore, a few management countermeasures, such as the enhancing people's
consciousness of fire-proofing and constructing species diversity, were put forward for forest sustainable development.
Foundation item: Under the auspices of the National Science Foundation of China (No. 30270225, 40331008) and the Chinese Academy of Sciences
(SCXZY0102).
Biography: KONG Fan-hua (1975-), female, Ph.D. candidate of Hiroshima University in Japan, specialized in Landscape Ecology.
Responsible editor: Zhu Hong 相似文献
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在黑龙江省小兴安岭东部地区(东经444-4726 N?北纬2633-13141? 海拔400-1000 m), 对不同封育时间、不同坡向的蒙古栎林中的主要乔木树种径级结构进行分析。在阳坡,针对封育5年 16年和24年蒙古栎种群, 分别选择6个重复样地。在阴坡,也同样分别选择6块样地。每块样地的面积为20 m×20 m。在每块样地中, 测量各树的胸高直径,树高和冠幅直径。结果表明:在封育5年样地内,蒙古栎、糠椴和黄榆种群的数量均随着径级的增加而单调下降,表明均为增长型种群;在封育16年以后,由于林内乔木层的盖度较大,糠椴和黄榆种群均呈不同程度的衰退,已经成为蒙古栎种群的伴生种群;封育24年样地中,蒙古栎种群明显成为优势树种。在阳坡随封育时间延长乔木层盖度增长较快,而阴坡乔木层盖度增长较慢;糠椴和黄榆种群随封育时间延长逐步衰退的现象在阳坡比阴坡表现明显。图2表1参8。 相似文献
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C and N stocks under three plantation forest ecosystems of Chinese fir, Michelia macclurei and their mixture 总被引:1,自引:0,他引:1
Chinese fir (Cunninghamia lanceolata), a type of subtropical fast-growing conifer tree, is widely distributed in South China. Its plantation area covers more
than 7 × 106 hm2, accounting for 24% of the total area of plantation forests in the country. In recent decades, the system of successive plantation
of Chinese fir has been widely used in southern China due to anticipated high economic return. However, recent studies have
documented that the practice of this system has led to dramatic decreases in soil fertility and forest environment as well
as in productivity.
Some forest ecologists and managers recognize the ecological role performed by broadleaf trees growing in mixtures with conifers,
and a great deal of studies on mixture effects have been conducted, particularly on mixture species of temperate and boreal
forests, but these research results were not completely consistent. Possibilities include dependence of the mixture effects
in large part to specific site conditions, the interactions among species in mixtures and biological characteristics of species.
Although some researchers also studied the effects of mixtures of Chinese fir and broadleaf tree species on soil fertility,
forest environment and tree growth status, little information is available about the effects of Chinese fir and its mixtures
with broadleaves on carbon and nitrogen stocks.
The experimental site is situated at the Huitong Experimental Station of Forest Ecology, Chinese Academy of Sciences, Hunan
Province (26°40′–27°09′ N, 109°26′–110°08′ E). It is located at the transition zone from the Yunnan-Guizhou Plateau to the
low mountains and hills of the southern bank of the Yangtze River at an altitude of 300–1,100 m above mean sea level. At the
same time, the site is also a member of the Chinese Ecosystem Research Network (CERN), sponsored by the Chinese Academy of
Sciences (CAS). This region has a humid mid-subtropical monsoon climate with a mean annual precipitation of 1,200–1,400 mm,
most of the rain falling between April and August, and a mean temperature of 16.5°C with a mean minimum of 4.9°C in January
and a mean maximum of 26.6°C in July. The experimental field has red-yellow soil.
After a clear-cutting of the first generation Chinese fir (Cunninghamia lanceolata) plantation forest in 1982, three different plantation forest ecosystems, viz. mixture of Michelia macclurei and Chinese fir (MCM), pure Michelia macclurei stand (PMS) and pure Chinese fir stand (PCS), were established in the spring of 1983. A comparative study on C and N stocks
under these three plantation forest ecosystems was conducted in 2004. Results showed that carbon stocks were greater under
the mixtures than under the pure Chinese fir forest and the pure broad-leaved forest, and the broadleaves and the mixtures
showed higher values in nitrogen stocks compared with the pure Chinese fir forest. The spatial distribution of carbon and
nitrogen stocks was basically consistent, the value being greater in soil layer, followed by tree layer, roots, understory
and litter layer. The carbon and nitrogen stocks in soil layer were both highly correlated with the biomass in understory
and litter layer, indicating that understory and forest litterfall exerted a profound effect on soil carbon and nitrogen stocks
under plantation ecosystems. However, correlations among soil carbon, nitrogen stocks and below ground biomass of stand have
not been observed in this study.
Translated from Acta Ecologica Sinica, 2005, 25(12): 3,146–3,154 [译自: 生态学报] 相似文献
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岷江上游景观格局变化研究(英文) 总被引:1,自引:0,他引:1
岷江上游地区位于青藏高原向四川盆地的过渡地段,其源头到都江堰市,包括汶川县、茂县、理县、黑水县和松潘县五个县。它是四川省乃至全国的一个重要的林区。在过去的几十年里,其景观结构发生了重要的变化。本文应用3S 技术研究了该区在1986 年到2000 年之间的景观变化情况。该区的景观被划分为10 个景观生态类型,即耕地、有林地、灌木林地、经济林、草地、居民用地、河流、湖泊、沼泽和未利用地。研究结果表明,在岷江上游地区林地和草地是该区主要的景观类型,约占全区面积的91%,景观类型之间的变化主要发生在有林地、灌木林地、草地、耕地、居民用地和经济林之间,并且有林地面积从51.17%下降到47.56%。分析结果表明,岷江上游地区在过去的几十年里其景观的破碎化在加剧。图1表2 参20。 相似文献
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Larch(Larix olgensis), Manchurian ash(Fraxinus mandshurica), Korean pine(Pinus koraiensis) and White birch(Betula platyphylla) are the major planting species in northeast China. The samples of forest litters were collected from the stands of the above
4 species in Laoyeling and Jianlagou experiment stations of Maorshan Exp. Forest Farm (45°12′–45°30′N, 127°30′–127°48′E),
Northeast Forestry University, in early October 2002. Quantitative analysis and qualitative analysis were carried out on the
organic acids existing in freshly fallen litters (L layer) and hemi-decomposed litters (F layer) of the four forest species
by using Gas Chromatogram system. A wide variety of organic acids were identified, including oxalic, malonic, fumaric, succinic,
maleic, malic, citric, C16:O, C18:O, C18:1, C18:2, C18:3 and C20:O acids. In respect of L litters of all samples, the oxalic acid content (over 30 mg/g) was the highest of the seven low-molecular-weight
organic acids identified, while the content of oleic or linoleic (above 40mg/g) was found to be highest among the six high
aliphatic acids identified. As to F litters, oxalic acid content was also the highest, followed by linoleic and oleic. For
the same tree species or the same forest, the kinds and contents of organic acids in L litters were more abundant than that
in F litters.
Foundation item: This paper is supported by National Natural Science Foundation of China (30170768)
Biography: SONG Jin-feng (1976-), female, doctor postgraduate, Harbin 150040, P. R. China.
Responsible editor: Chai Ruihai 相似文献
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Xiaoming Zhang Xinxiao Yu Sihong Wu Tianxing Wei Xuepei Zhang 《Frontiers of Forestry in China》2006,1(3):336-342
According to fixed-position data for 1985–2003 from nine runoff plots of Caijiachuan watershed which lies in Jixian County
of Shanxi Province in Loess area, this paper studied the relationship between vegetation and runoff and sediment production
in sloping lands in detail, which helps to provide scientific basis for vegetation re-construction and studies on environmental
transformation of water and sediment in watersheds of Loess area. Although, many study results testify that forest vegetation
has an important function in soil and water conservation and cutting runoff, the effect of vegetation on runoff and sediment
transmission is complicated, and this needs to be studied in depth. The results of the paper showed the following. Firstly,
the natural secondary forest performs better function of soil and water conservation than artificial Robinia pseudoacacia forest, and runoff and sediment produced in the former in individual rainfall were 65%–82% and 23%–92% of those produced
in the latter. At the same time, better correlative relationship between runoff and sediment production and rainfall and rainfall
intensity were testified by multiple regression, but the correlation decreased gradually with the increase of canopy density
of forest. Secondly, the difference of runoff and sediment production in several land use types was very distinct, and the
amount of runoff and sediment produced from Ostryopsis davidiana forest and natural secondary forest were the least, and runoff and sediment produced from in artificial Robinia pseudoacacia forest and Pinus tabulaeformis forest were 5-fold as much as those from O. davidiana forest. Besides, runoff and sediment produced in mixed planting of apple trees and crops were 16.14-fold and 2.96-fold than
those of O. davidiana forest, respectively, but the amount decreased obviously after high-standard soil preparation in the case of the former.
Thirdly, based on gray cognate analyses of factors affecting runoff and sediment production in sloping land, the factors of
stand canopy density and herb and litter biomass were the most significant ones, whose gray incidence degree exceeded 0.6.
Therefore, mixed forest with multi-layer stand structure and shrub forest should be developed in vegetation re-construction
of Loess area, which will help to increase coverage and litter thickness in order to cut down the runoff and sediment dramatically
in sloping land.
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Translated from Chinese Journal of Applied Ecology, 2005, 16(9): 1,613–1,617 [译自: 应用生态学报, 2005, 16(9): 1,613–1,617] 相似文献
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IntroductionHeilongiiangProvinceisoneoftheIargestforestryregionsinChina,whichisnamedaspreciousregionsofforestsdeposits.Greatamountoftimberandrnanykindsofforestproductshavebeenproducedthere.Thedenseforestshaveprovidednaturaldefenseforthesucceedinghighand's… 相似文献
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Sławomir Mitrus Grzegorz Hebda Tomasz Wesołowski 《Scandinavian Journal of Forest Research》2016,31(2):135-139
A previously unknown association of ants with birds breeding in tree holes is described. Ants Lasius brunneus Latreille (Hymenoptera: Formicidae) were found in c. 15% of nests of Parus major L. and Poecile palustris L. (Paridae) breeding in tree holes in the primeval deciduous forest located in the Bia?owie?a National Park (Poland). The ants preferably used holes located higher above the ground. As such holes are warmer than the unused holes or other nest sites, it is suggested that the ants cohabit holes utilized by the tits to gain thermal benefits. 相似文献
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Robinia pseudoacacia stands act as a typical ecological protection forest in hilly semi-arid area of China. Two fields of surface runoff were
separately set up inR. pseudoacacia stand and its clearcut area in the western Liaoning Province (18°50’–122°25’ E, 40°24’–42°34’ N) for measuring the characteristics
of runoff and sediment as well as soil moisture dynamics. Contractive analysis of the two land types showed that there existed
a significant difference in volumes of runoff and sediment between the sites ofR. pseudoacacia stand and its clearcut area. The runoff volume and sediment volume in clearcut are were much bigger than those inR. pseudoacacia stand, with an increase amount of 40%–177% for runoff and 180%–400% for sediment. Hydrograph of surface runoff of typical
rainfall showed that the peak value of runoff inR. pseudoacacia stand was decreased by 1.0–2.5×10−3m3·s−1 compared with that in its clearcut area, and the occurring time of peak value of runoff inR. pseudoacacia stand was 10–20 min later than that in its clearcut area. Harmonic analysis of soil moisture dynamics indicated that the
soil moisture inR. pseudoacacia stand was 2.3% higher than that in clearcut area, and the soil moisture both inR. pseudoacia stand and its clearcut area could be divided into dry season and humid season and varied periodically with annual raifall
precipitation. It was concluded thatR. pseudoacacia stand plays a very important role in storing water, increasing soil moisture, and reducing surface runoff and soil erosion.
Foundation item: This paper was supported by Chinese “863” Plan Water-Saving Agriculture (2002AA2Z4321), the Key Knowledge Innovation Project
(SCXZY0103), and The “Tenth-five” Plan of Liaoning Province (2001212001).
Biography: GAO Peng (1967-), male, Dr. candidate, associate professor of Institute of Applied Ecology, Chinese Academy of Sciences,
Shenyang 110016, P. R. China.
Responsible editor: Song Funan 相似文献
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[目的]研究北京海淀区3种道路防护林(油松林、圆柏林、银杏林)的滞尘能力、林内滞尘的空间分布规律、滞尘作用与气象因子和PM10浓度的相关性。[方法]滞尘量的测定用单位叶干质量滞尘量(mg·g-1)表征叶面滞尘能力。于冬、春、夏、秋4季对3种道路防护林内距道路不同距离处的滞尘量进行连续观测,比较3种道路防护林滞尘能力,分析3种道路防护林滞尘的空间分布特征及降雨等气象因子及PM10浓度与滞尘作用的相关性。[结果](1) 3种道路防护林总体单位滞尘量圆柏林(4. 20±0. 19 mg·g-1)银杏林(1. 98±0. 07 mg·g-1)油松林(1. 71±0. 07 mg·g-1);油松和圆柏林的单位滞尘量冬季春季秋季夏季,银杏林的单位滞尘量春季和秋季基本无差异,夏季最低; 3种道路防护林的单位滞尘量在各季节均为圆柏林最高,银杏林次之,油松林最低。(2) 3种道路防护林空间分布的总体特征为:油松和圆柏林的滞尘空间分布均表现为"两端高、中间低",银杏林单位滞尘量林分中间位置略高于两侧;不同季节表现为冬季北侧高,春季南侧高,夏、秋季南北侧差异不显著。(3)降水量对3种道路防护林滞尘作用影响最大,是3种道路防护林滞尘的最主要限制因子,极大风速、气温、相对湿度和PM10浓度对3种道路防护林滞尘均具有不同程度的正的直接作用。[结论]在相同配置模式(5 m×5 m)及林龄(18年)下,林地尺度滞尘量油松林最大、圆柏林次之、银杏林最低。道路防护林迎风一侧往往具有较高滞尘量,可根据盛行风向强化迎风侧的树木配置。降雨是树木滞尘的主要限制因子,冬季和春季降雨少,树木滞尘量较大,可结合人工冲洗措施使其发挥更大滞尘作用。 相似文献