干旱区生态环境知识资源中心(Arid): 沙质草地生境中植物群落对土壤质地演进的响应

Arid

	沙质草地生境中植物群落对土壤质地演进的响应
其他题名	Responses of Plant Communities to the Soil Texture Evolution in Sandy Grassland
	吴旭东 1; 宋乃平2 ; 潘军 2
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2016
卷号	30 期号:3 页码:285-290,304
中文摘要	利用空间代替时间,选取6个沙地生境类型(硬质灰钙土H_1,沙质灰钙土H_2,固定沙地H_3,半固定沙地H_4,半流动沙地H_5和流动沙地H_6),通过对其土壤颗粒组成、草地植物群落结构及数量特征的分析,研究沙质草地植物群落演替对土壤沙化过程的响应。结果表明:(1)从硬质灰钙土到流动沙地,物种丰富度分别为9,12,9,9,9,5种;演替初期(H_1-H_2)多年生草本植物种占绝对优势,演替中期(H_3-H_4)一年生植物优势度明显,演替后期(H_5-H_6)则以半灌木占主导地位;各演替阶段禾本科植物均有很高的优势度,在半流动沙地阶段成为最大优势物种,在沙质灰钙土后藜科植物优势度保持相对稳定,菊科和豆科植物分别在固定沙地和半固定沙地阶段逐渐消失。(2)物种多样性在沙质灰钙土最高,到固定沙地持续递减,而到流动沙地时又增大,生态优势度与物种多样性变化趋势正好相反,均匀度表现出先减小后增大的趋势,相邻的两个群落间具有较高的相似度。(3)从硬质灰钙土到流动沙地,010 cm土层土壤黏粉粒含量极显著减少(p<0.01),而粗砂粒极显著增加(p<0.01),土壤颗粒分形维数由2.52下降到1.73。(4)一年生草本植物优势度与土壤黏粉粒含量、土壤颗粒分形维数呈显著负相关(p<0.05);豆科植物优势度与土壤粉粒组分、土壤颗粒分形维数间呈显著正相关(p<0.05);物种多样性与粉粒组分含量呈极显著正相关(p<0.01),与细砂粒组分含量、土壤颗粒分形维数间呈显著正相关(p<0.05)。
英文摘要	By the method of substituting temporal serial with spatial serial,and taking six sandy grasslands with different habitat types(H_1,hard sierozem,H_2,sandy sierozem,H_3,fixed sand dune,H_4,emifixed sand dune,H_5,semimobile dune,H_6,mobile sand dune)in desert steppe region as test objects,this paper studied the responses of plant community succession on sandy grassland desertification process by analyzing the composition of its soil particles and grassland plant community structures and features.The results showed that: The species richness was 9,12,9,9,9 and 5 in the communities respectively,of which the desertification succession was from hard sierozem to mobile sand dune.For life form composition of all communities along the desertification succession,the dominant species were the perennial herbaceous plants from hard sierozem to sandy sierozem,and the dominant species were the annual herbaceous plants from fixed sand dune to emifixed sand dune,then,the dominant species were semi-shrubs from semimobile dune to mobile sand dune.Species number of Gramineae in the community was the highest dominant species in the semi-mobile sandy stage. Species number of Chenopodiaceae was stable after sandy sierozem.Species number of Compositae and Leguminosae disappeared or decreased continuously along the fixed and semi-fixed sand sandy succession gradient and their importance in community also decreased gradually.The species diversity was the highest in sandy sierozem,and decreased then in fixed sand,and increased again in mobile sand dune.Along with succession, the ecological dominance and species diversity which performed the opposite trend.However,the community evenness showed decreased firstly and then increased gradually again.There was a high degree of similarity between two adjacent communities along with succession.The content of clay silt reduced significantly,as well as soil particle fractal dimension in 010 cm soil layer(p<0.01),but the content of gravel increased significantly.There was a significant negative correlation among annual herbaceous plants dominance,silt and clay soil and soil particle fractal dimension(p<0.05),while it showed a significant positive correlation(p<0.05)between Leguminosae dominance and silt,and soil fractal dimension,and then there was a significant positive correlation between species diversity and the content of silt(p<0.01),and had a significant positive correlation(p<0.05)between species diversity and fine sand content,soil fractal dimension.
中文关键词	土壤质地 ; 植物群落 ; 荒漠草原
英文关键词	soil texture plant communities desert grassland
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5718821
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/2XILL650/234973
作者单位	1.宁夏大学农学院, 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; 2.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	吴旭东,宋乃平,潘军. 沙质草地生境中植物群落对土壤质地演进的响应[J]. 宁夏大学,2016,30(3):285-290,304.
APA	吴旭东,宋乃平,&潘军.(2016).沙质草地生境中植物群落对土壤质地演进的响应.水土保持学报,30(3),285-290,304.
MLA	吴旭东,et al."沙质草地生境中植物群落对土壤质地演进的响应".水土保持学报 30.3(2016):285-290,304.