干旱区生态环境知识资源中心(Arid): 腾格里沙漠南缘3种优势植物种子出苗对土壤类型和沙埋的响应

Arid

	腾格里沙漠南缘3种优势植物种子出苗对土壤类型和沙埋的响应
其他题名	Response of Seedling Emergence of Three Dominant Plant Species to Soil Type and Sand Burial Depth in the Southern Marginal Zone of the Tengger Desert
	樊宝丽 1; 马全林1 ; 张德魁 1; 安婧荣 2
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2011
卷号	28 期号:6 页码:1038-1044
中文摘要	沙米 (Agriophyllum squarrosum)、沙蒿(Artemisia sphaerocephala)和油蒿(Artemisia ordosica) 分别是腾格里沙漠南缘不同植被演替阶段的3个优势物种,2009年5~6月在大田盆栽条件下,设计了2种土壤类型和 0 cm,1 cm,2 cm,3 cm,4 cm,6 cm,8 cm 共7个沙埋深度处理,研究土壤类型和沙埋对这3种植物种子出苗的影响。结果发现:在沙土条件下,沙米0 cm埋深出苗率最低、出苗速度最慢;1~2 cm的浅层埋深下,沙米、沙蒿和油蒿的幼苗出苗速度最快、出苗率也最高。出苗时间随着沙埋深度的增加而延长,出苗率随着沙埋深度的增加而降低。沙壤土条件下,3个物种的出苗率及出苗速度都较沙土条件中的同等埋深条件下有所降低,同时,沙米和油蒿的最佳埋深由 2 cm 降低到 1 cm,表明沙土比沙壤土更利于植物的出苗。沙土条件下,沙米在 0~6 cm 各个埋深处理下都有较高的出苗率,生态适应性较沙蒿和油蒿更广,所以能够成为流动沙丘的优势物种;沙壤土条件下,沙米在各个埋深处理下开始出苗所需时间均最长,同时,沙米的幼苗死亡率也很高,但沙蒿和油蒿的幼苗死亡率很低,因此逐渐取代了沙米,成为固定、半固定沙丘上的主要物种。
英文摘要	Agriophyllum squarrosum, Artemisia sphaerocephala and Artemisia ordosica are the dominant plant species at different stages of vegetation succession in the southern Tengger Desert. A field-pot experiment was conducted at Wuwei Station for Desert Control Research in summer 2009. Response of the seedling emergence rates of the 3 species to two soil types (sand and sandy loam) and seven sand burial depths (0, 1, 2, 3, 4, 6 cm and 8 cm) was measured. Seedling emergence rate of A. squarrosum seeds buried at 0 cm in sand was the lowest, that of the 3 species seeds buried at 1 and 2 cm in sand was the highest, and that of the 3 species seeds buried in sandy loam was lower than that in sand. The optimal burial depth for seedling emergence of A. squarrosum and A. ordosica was decreased from 2 cm in sand to 1 cm in sandy loam. In sand, A. squarrosum seeds at all sand burial depths emerged, the seedling emergence rate was high, and the seedling mortality rate was low; thus, A. squarrosum could be the dominant species for sand dunes. In sandy loam, however, the emergence speed of A. squarrosum seeds at sand burial depths of 0-4 cm was slow, and the seedling mortality rate was higher than that of other two species. Thus, A. sphaerocephala and A. squarrosum replaced A. squarrosum on fixed and semi-fixed dunes at the seeding stage.
中文关键词	土壤类型 ; 沙埋深度 ; 植物种子 ; 出苗率 ; 死亡率 ; 腾格里沙漠
英文关键词	soil type sand burial depth seed seedling emergence rate mortality rate Tengger Desert
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:4379211
来源机构	甘肃省治沙研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226548
作者单位	1.甘肃省治沙研究所, 甘肃省荒漠化防治重点实验室, 兰州, 甘肃 730070, 中国; 2.古浪县林业局, 古浪, 甘肃 733100, 中国
推荐引用方式 GB/T 7714	樊宝丽,马全林,张德魁,等. 腾格里沙漠南缘3种优势植物种子出苗对土壤类型和沙埋的响应[J]. 甘肃省治沙研究所,2011,28(6):1038-1044.
APA	樊宝丽,马全林,张德魁,&安婧荣.(2011).腾格里沙漠南缘3种优势植物种子出苗对土壤类型和沙埋的响应.干旱区研究,28(6),1038-1044.
MLA	樊宝丽,et al."腾格里沙漠南缘3种优势植物种子出苗对土壤类型和沙埋的响应".干旱区研究 28.6(2011):1038-1044.