干旱区生态环境知识资源中心(Arid): 荒漠草原人工柠条林土壤与植被的演变特征

Arid

	荒漠草原人工柠条林土壤与植被的演变特征
其他题名	Antidromal Succession between Soil and Plant in the Caragana intermedia Shrubland in the Desert Steppe
	杨新国; 赵伟; 陈林; 王磊; 宋乃平
来源期刊	生态环境学报
ISSN	1674-5906
出版年	2015
卷号	24 期号:4 页码:590-594
中文摘要	为系统认识荒漠草原地区柠条(Caragana intermedia)人工林系统演变的趋势,为老化柠条林的更新改造提供科学依据,利用2011─2013年间宁夏盐池荒漠草原地区不同林龄柠条林地的连续监测调查数据,总结分析了伴生植被和表层土壤的演变特征。研究表明,荒漠草原人工柠条林土壤与植被呈现出明显的异向演变格局,具体表现为早期土壤的相对稳定和植被的快速恢复,以及后期土壤的显著性恢复和植被新的退化。其中表层土壤有机碳、全磷和黏粉粒含量呈现出平缓而显著的增长,w(SOC)增长35.9%,老龄林w(SOC)平均恢复到4,w(黏粉粒)累积增加147.4%,但w(TP)的增幅只有28%。w(TN)、w(C)/w(N)比值、土壤物理稳定性则未出现显著性的阶段性或全局性变化。林间植被的变化较复杂,其中物种数、高度、密度、丰富度指数、多样性和优势度指数在中龄林阶段显著恢复,但之后快速下降,盖度、生物量和均匀度指数则相对稳定。各个指标均值的峰值和出现的林龄阶段分别为:物种数9.46种(中龄林T2)、总盖度31.4%(中老龄林T3)、平均高度9.99 cm(T2)、密度184.8 plant?m~(-2)(T2)、生物量82.68 g?m~(-2)(T3)、丰富度指数1.56(T2)、多样性指数1.73(T2)、优势度指数0.76(T2)、均匀度指数0.66(T2)。整体而言,柠条进入荒漠草原退化草地近40年内,表层土壤质量表现出缓慢而明确的正向恢复演变趋势,但是林间植被数量特征和多样性水平恢复趋势并不明确。荒漠草原人工柠条林系统的演替走向或稳定性的维持,依然存在诸多不确定性。
英文摘要	To understand the success trends of Caragana intermedia shrubland in the desert steppe and sustain rebuilding of aging shrubland, based on the monitor data during 2011─2013 for different ages of Caragana intermedia shrublands in the desert steppe in Yanchi county Ningxia, we summarized the changes of Number of vegetation characteristics, diversity, topsoil nutrient and physical structure, and so on. The researches showed that a typical antidromal succession relationship occured between the soil and plant, for specific performance, the relative stability of topsoil and the rapid recovery of plant during the early stage, and the significant improvement of topsoil quality and the new round of plant degeneration during the later period. Soil organic carbon (SOC), total phosphorus (TP) and sum of silt and clay (Silt+Clay) increased gently and significantly, the content of SOC increased 35.9%, and that in aging shrubland recovered to 4, the content of silt and clay added 147.4%, but that of TP increased only 28%.But no significant periodical or global changes occured for total nitrogen (TN), soil physical stability index (St) and carbon nitrogen ratio (C/N). Comparatively speaking, the changes of plant were more complex, for specific performance, significant recovery at the middle-age occured for the species number (SN), average height(AH), density (TD), richness index (R), diversity index (H), and dominance index (D), but immediately these indicators decreased, at the same time, total coverage degree (CD), aboveground biomass (TB) and evenness index(E) remained stable. The peak values of vegetation indexes and the shrubland ages when the values were largest were listed here, SN 9.46 (middle-age, T2), CD 31.4%(middle-old-age, T3), AH9.99 cm (T2), TD 184.8/m~2 (T2), TB 82.68 g?m~(-2) (T3), R 1.56 (T2), H 1.73 (T2), D 0.76 (T2), E 0.66 (T2). On the whole, during the nearly 40 a since Caragana intermedia was introduced into the desert steppe in Yanchi county, the topsoil quality showed slow but clear positive succession, however, the trend for the plant was not obvious. According to the maybe missing of feedback mechanism between the soil and plant reflected in the different succession relationship, there were many uncertainties for the trends and stability maintian of Caragana intermedia shrublands in the desert steppe, going with the naturly decline of Caragana intermedia.
中文关键词	柠条 ; 荒漠草原 ; 土壤 ; 植被 ; 演变
英文关键词	Caragana intermedia desert steppe soil plant succession
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:5431430
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233108
作者单位	宁夏大学, 西北土地退化与生态恢复国家重点实验室培育基地, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	杨新国,赵伟,陈林,等. 荒漠草原人工柠条林土壤与植被的演变特征[J]. 宁夏大学,2015,24(4):590-594.
APA	杨新国,赵伟,陈林,王磊,&宋乃平.(2015).荒漠草原人工柠条林土壤与植被的演变特征.生态环境学报,24(4),590-594.
MLA	杨新国,et al."荒漠草原人工柠条林土壤与植被的演变特征".生态环境学报 24.4(2015):590-594.