检索结果-南通市图书馆

Effect of sand-fixing vegetation on the hydrological regulation function of sand dunes and its practical significance

在线全文

学校读者我要写书评

暂无评论

Journal of Arid Land 2023年第1期15卷 52-62页

作者： alamusa SU Yuhang YIN Jiawang ZHOU Quanlai WANG Yongcui Institute of Applied Ecology Chinese Academy of SciencesShenyang 110016China University of Chinese Academy of Sciences Beijing 100049China

Soil water content is a key controlling factor for vegetation restoration in sand *** deep seepage and lateral migration of water in dunes affect the recharge process of deep soil water and groundwater in sand dune *** determine the influence of vegetation on the hydrological regulation function of sand dunes,we examined the deep seepage and lateral migration of dune water with different vegetation coverages during the growing season in the Horqin Sandy Land,*** results showed that the deep seepage and lateral migration of water decreased with the increase in vegetation coverage on the *** accumulated deep seepage water of mobile dunes(vegetation coverage13.75%)should be retained as a water resource reservoir to maintain the water balance of artificial fixed dune *** findings provide reliable evidence for the accurate assessment of water resources within the sand dune ecosystem and guide the construction of desertification control projects.

关键词： vegetation coverage hydrological regulation soil water deep seepage sand dune water balance desertification control

Comparison of seed germination of four Artemisia species (Asteraceae) in northeastern Inner Mongolia,China

在线全文

学校读者我要写书评

暂无评论

Journal of Arid Land 2012年第1期4卷 36-42页

作者： XueHua LI DeMing JIANG alamusa QuanLai ZHOU Toshio OSHIDA Institute of Applied Ecology Chinese Academy of Sciences Azabu University Sagamihara 252-5201Japan

Two psammophile-dominated Artemisia semi-shrubs （A. wudanica and A. halodendron） and two annual Artemisia forbs （A. sieversiana and A. scoparia） bear significant ecological functions in Horqin Sandy Land, but systematical information on their achenes＇ germination is very limited. A set of studies were conducted to evaluate seed germination responses to storage periods and methods, different temperatures, lights conditions and sand burial depths, in order to determine inter-specific germination variation in the same genus and to explain how the species adapt to its microhabitat. Fresh achenes of A. wudanica, A. halodendron and A. sieversiana showed high germination capacities, but those of A. scoparia had obvious innate dormancy, which could be broken by chilling and dry storage, especially long-term dry storage. Achene germination of the two semi-shrubs preferred lower temperature fluctuation （10 to 22℃） and was not sensitive to light. But the two annuals preferred higher temperature fluctuation （34 to 22℃） and strong light for their achene germination. These four Artemisia species showed similar responses to sand burial, i.e. soil surface was most favorable for seedling emergence, and the deeper the sand burial, the fewer the seedling emergence. For the two semi-shrubs, their microhabitats are sand dunes with high temperature and intense light, which are not favorable for germination and seedling survival. Only rainfall contributes to temporary decrease of temperature and then triggers germination. We deduced that germination is not the main but a supplementary repro- ductive mode for the two semi-shrubs in sand dunes. For the two annuals, achene germination is the only reproductive mode, but different responses have been developed for microhabitat adaptation. For A. sieversiana, high germination capacities in wide temperature ranges and all light conditions could improve its competition and advancement in the wettest microhabitats. For A. scoparia, obvious innate

关键词： annuals semi-shrubs Artemisia species germination chilling and dry storage light temperature sand burial

Spatial heterogeneity of plant species on the windward slope of active sand dunes in a semi-arid region of China

在线全文

学校读者我要写书评

暂无评论

Journal of Arid Land 2013年第1期5卷 80-88页

作者： DeMing JIANG ChunPing MIAO XueHua LI XiaoLan LI alamusa QuanLai ZHOU Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Xinjiang Academy of Agricultural and Reclamation Sciences Shihezi 832000 China

Species richness and abundance are two important species diversity variables that have attracted particular attention because of their significance in determining present and future species composition conditions. This paper aims to explain the qualitative and quantitative relationships between species diversity pattern and grain size （i.e. size of the sampling unit）, and species diversity pattern and sampling area, and to analyze species diversity variability on active sand dunes in the Horqin Sandy Land, northeastern Inner Mongolia, China. A 50 mx50 m sampling plot was selected on the windward slope, where the dominant species was annual herb Agriophyllum squarrosum. Species composition and abundance at five grain sizes were recorded, and the species-area curves were produced for thirteen grain sizes. The range of values for species abundance tended to increase with in- creasing grain size in the study area, whereas, generally, species richness did not follow this rule because of poor species richness on the windward slope of active sand dunes. However, the homogeneity of species richness in- creased significantly. With the increase in sampling area, species abundance increased linearly, but richness in- creased logarithmically. Furthermore, variograms showed that species diversity on the windward slope of active sand dunes was weakly anisotropic and the distribution pattern was random, according to the Moran Coefficient. The results also showed that species richness was low, with a random distribution pattern. This conflicts with the results of previous studies that showed spatial aggregation in lower richness in a sampling area within a community and inferred that the physical processes play a more important role in species diversity than distribution pattern on active sand dunes. Further research into different diversity patterns and mechanisms between active sand dunes and interdune lowlands should be conducted to better understand biodiversity conservation in

关键词： abundance richness grain size species-area curve variogram Horqin Sandy Land

The return and loss of litter phosphorus in different types of sand dunes in Horqin Sandy Land,northeastern China

在线全文

学校读者我要写书评

暂无评论

Journal of Arid Land 2012年第4期4卷 431-440页

作者： QuanLai ZHOU DeMing JIANG ZhiMin LIU alamusa XueHua LI YongMing LUO HongMei WANG Institute of Applied Ecology Chinese Academy of SciencesShenyang 110016China

Litter phosphorus （P） return is important to maintain the P cycle and balance in the sandy land of arid areas. In this study, we determined the loss and return of litter P in sand dune areas and elucidated their relation- ship. We investigated litter production and litter P amount, and simulated leaf litter moving dynamics to understand the relationships between the loss of litter P and the total litter P, and between the return of litter P and the total litter P in active （AD）, semi-stabilized （SSD） and stabilized （SD） dunes in Inner Mongolia, northeastern China. The vegetation litter P was 12.6, 94.5, and 201.6 mg P/m2 in AD, SSD, and SD, respectively. A significant movement and loss of leaf litter P with time occurred on the three types of sand dunes. As a result, the loss of P was 7.4, 46.9, and 69.8 mg P/m2 and the return of P was 5.5, 47.6, and 131.8 mg P/m2 in AD, SSD, and SD, respectively. The rela- tionship between both loss and return of P and total litter P in AD, SSD, and SD was revealed by linear regression. The slope of the regression line indicated the rate of loss or return of litter P. From AD to SD, the loss rate showed a declining slope （0.52, 0.32, and 0.17 for AD, SSD, and SD, respectively）, and the return rate showed a rising slope （0.48, 0.67, and 0.83 for AD, SSD, and SD, respectively）. The loss of litter P should be regarded in the local man- agement of vegetation and land in sand dune areas. Improved vegetation restoration measures are necessary to decrease litter P loss to maintain the stability of ecosystems in sand dune areas.

关键词： leaf litter litter loss litter production sand dune areas vegetation restoration

Foliar δ^13C Values and Water Use Efficiency ofSemi-arid Plants in Horqin Sandy Land, China

在线全文

学校读者我要写书评

暂无评论

Agricultural Science & Technology 2017年第3期18卷 458-463页

作者： Na ZHANG Deming JIANG alamusa Yongjiao HAN Hebei Normal University for Nationalities Chengde 067000 China Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China

Water was a key factor restricting the plantation in sandy areas. Foliar δ^(13)C value regarded as an indicator of longterm water use efficiency(WUE) of plants was generally used to evaluate the adaptability of plants to arid and semi-arid environment. In Horqin sandy land of China, the foliar δ^(13)C values of 114 species in 35 families naturally growing in the area, and 15 species of sand-fixing trees and shrubs were measured and analyzed in 2012. The results showed that 97 species in all 114 species were C_3 plants and only 17 species were C_4 plants. Most C_4 plants belonged to Gramineae family. The foliar δ^(13)C value of C_3 plants was between -25.000 and -31.075‰ with an average of-28.226‰, while those of C_4 plants between -12.578 and -16.334‰, with an average of -13.678‰. The δ^(13)C values of mature leaves collected in August were averagely 0.85‰ less than that of juvenile leaves collected in June. The foliar δ^(13)C values and WUE of 15 sand-fixing tree species in Horqin sandy land ranked in the order as: *** >*** >*** >*** >*** >*** >*** >*** >*** >*** >*** >*** >*** >*** >***.

关键词： Semi-arid area Foliar δ^13C value Water use efficiency Horqin sandy land

在线全文

学校读者我要写书评

暂无评论

科尔沁沙地樟子松林降雨再分配特征

生态学杂志 2016年第8期35卷 2046-2055页

作者：刘亚阿拉木萨曹静中国科学院沈阳应用生态研究所沈阳110016 中国科学院大学北京100049

以中国科学院乌兰敖都荒漠化实验站35年生樟子松人工林为研究对象,通过对降雨、穿透雨、树干径流和林冠截留的观测,研究樟子松林对降雨再分配作用,分析各部分产生的阈值,确定降雨有效补给量。结果表明：2015年5—9月共观测到降雨事件31... 详细信息

以中国科学院乌兰敖都荒漠化实验站35年生樟子松人工林为研究对象,通过对降雨、穿透雨、树干径流和林冠截留的观测,研究樟子松林对降雨再分配作用,分析各部分产生的阈值,确定降雨有效补给量。结果表明：2015年5—9月共观测到降雨事件31次,呈现小数量、低强度的特征,樟子松林地穿透雨、树干径流和林冠截留分别占同期降雨量的69.28%、1.26%和29.45%。林地有效补给量为117.67 mm,占降雨量的70.54%。穿透雨随降雨量增加而线性增加,发生阈值为0.85 mm降雨量;树干径流与降雨量呈二次多项式关系,当降雨量达到2.44 mm时,产生树干径流;林冠截留随降雨量呈现幂函数关系,截留率随降雨量呈指数减少趋势。降雨再分配比例受降雨等级影响,当降雨等级为15~20 mm时,林内有效降雨比例最高（90.35%）。明确樟子松林降雨再分配特征和比例变化对理解降雨补给作用和林地衰退的水分机制具有重意义。

关键词：科尔沁沙地樟子松衰退水分阈值降雨再分配

科尔沁沙地21种植物水分提升作用的实证检验

在线全文

学校读者我要写书评

暂无评论

北京林业大学学报 2011年第1期33卷 70-77页

作者：阿拉木萨周丽芳中国科学院沈阳应用生态研究所中国科学院研究生院

对科尔沁沙地21种植物开展了水分提升作用检测和发生特点研究。试验采用上下层土壤隔离的自制栽植箱,通过控制上、下层土壤水分含量的方法检测植物水分提升作用。结果表明:有19个参试物种观测到水分提升作用,水分提升作用可能是沙生植... 详细信息

对科尔沁沙地21种植物开展了水分提升作用检测和发生特点研究。试验采用上下层土壤隔离的自制栽植箱,通过控制上、下层土壤水分含量的方法检测植物水分提升作用。结果表明:有19个参试物种观测到水分提升作用,水分提升作用可能是沙生植物适应干旱环境的普遍特性;植物水分提升作用在00:00-06:00时段内发生频率和提升数量较高;不同物种间水分提升能力存在差异,本研究首次采用每克根系生物量(干质量)24h可产生的水分提升数量作为比较植物水分提升能力的单位,其数值变化范围为4.86～325.62g/g之间,平均为72.9g/g。综合比较认为,乌丹蒿、万年蒿、牧马豆和雾冰藜具有较强的水分提升能力。浅层土壤干旱程度与累计水分提升数量在统计学分析上并未表现出明显的相关性。利用植物水分提升能力改善固沙植被区浅层土壤水分环境条件,对提高半干旱区人工固沙植被的稳定性具有重要意义。

关键词：沙生植物水分提升土壤水分再分配科尔沁沙地

在线全文

学校读者我要写书评

暂无评论

植被的防治风蚀作用

生态学杂志 2007年第5期26卷 743-748页

作者：贺山峰蒋德明阿拉木萨中国科学院沈阳应用生态研究所

土壤风蚀是造成干旱、半干旱地区土地荒漠化与沙尘暴灾害的首要因素,也是目前全球性的主要环境问题之一。许多研究表明,通过植物防治风蚀是一种最根本、经济而有效的措施。本文在阅读大量国内外该领域文献的基础上,介绍了目前研究植被... 详细信息

土壤风蚀是造成干旱、半干旱地区土地荒漠化与沙尘暴灾害的首要因素,也是目前全球性的主要环境问题之一。许多研究表明,通过植物防治风蚀是一种最根本、经济而有效的措施。本文在阅读大量国内外该领域文献的基础上,介绍了目前研究植被防治风蚀作用的风洞实验、野外观测和模型模拟3种主要方法,阐述了植被防治风蚀作用的机理及影响因素,并结合当前国内存在的一些问题和不足,对今后应重点开展的研究和需要解决的问题作了探讨。

关键词：防治风蚀风洞实验模型风蚀输沙率

在线全文

学校读者我要写书评

暂无评论

科尔沁沙地沙丘水分深层渗漏量和侧向运移量

中国沙漠 2019年第3期39卷 41-47页

作者：曹静阿拉木萨张圆浩中国科学院沈阳应用生态研究所辽宁沈阳110016 中国科学院大学北京100049

沙丘水分的深层渗漏和侧向运移与深层土壤水、地下水及相邻丘间低地的水分状况密切关联。以科尔沁沙地典型流动沙丘迎风坡坡底\,迎风坡坡中、坡顶、背风坡坡中和背风坡坡底监测点为例,采用自制的水分渗漏量及侧向运移量的监测装置,测定... 详细信息

沙丘水分的深层渗漏和侧向运移与深层土壤水、地下水及相邻丘间低地的水分状况密切关联。以科尔沁沙地典型流动沙丘迎风坡坡底\,迎风坡坡中、坡顶、背风坡坡中和背风坡坡底监测点为例,采用自制的水分渗漏量及侧向运移量的监测装置,测定了科尔沁沙地流动沙丘各坡位入渗到0~100 cm土层雨水沿坡面的侧向运移量及入渗到100 cm以下的深层渗漏量。结果表明:生长季(5-10月)流动沙丘坡顶、迎风坡坡中、背风坡坡中、背风坡坡底处累积深层渗漏量分别为44.46、78.65、61.84、147.6 mm,分别占同期降雨量的17.03%、30.12%、23.68%、56.53%;迎风坡坡中、背风坡坡中、背风坡坡底处的累积侧向运移量分别为32.35、96.47、82.59mm,分别占同期降雨量的12.39%、36.95%、31.63%。迎风坡坡中(P<0.01)和坡顶(P<0.05)的月深层渗漏量与月降雨量均显著正相关;背风坡坡中(P<0.01)和背风坡坡底(P<0.05)的月侧向运移量与降雨量均显著正相关。

关键词：流动沙丘深层渗漏量侧向运移量降雨量