Characteristics of soil seed bank of Caragana microphylla community under grazing and enclosure conditions in Horqin sandy land.

Q3 Environmental Science
Li Ming, J. Deming, Luo Yongming, Wang Xiumei, L. Bo, T. Oshida
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Abstract

In this paper,the characteristics of soil seed bank of Caragana microphylla community under the grazing and enclosure conditions in Horqin Sandy Land,northeast Inner Mongolia,China were comparatively studied.The results are as follows:(1) The species of soil seed bank were dominated by the annual plants,and there was no significant difference in species richness between the grazed and fenced plots;(2) The seed density of soil seed bank in the grazing steppe was 3 475±519 seeds·m-2,it was 20 241±1 714 seeds·m-2 in the plots fenced for 6 years and 28 777±3 946 seeds·m-2 in the plots fenced for 12 years,and it was significantly higher in the fenced plots than that in the grazed plots;(3) The indexes of Shannon-Wiener and Simpson species diversity and Pielou evenness in the grazed plots were 1.36,0.68 and 0.56 respectively,and they were decreased with the increase of fenced time in the fenced plots;(4) Vertically,most seeds were found in topsoil of 0~2 cm in all plots,but the seed density of soil seed bank in all soil layers in fenced plots were significantly higher than that in the grazed plot;(5) The seeds were in an obvious aggregation distribution pattern in all plots,but the spatial heterogeneity of soil seed bank in the grazed plots was significant higher than that in the fenced plots.
放牧和圈闭条件下科尔沁沙地小叶锦鸡儿群落土壤种子库特征
对内蒙古东北部科尔沁沙地小叶锦鸡儿群落在放牧和圈养条件下的土壤种子库特征进行了比较研究。结果如下:(1)土壤种子库的物种是由一年生植物,也没有显著差异在放牧之间的物种丰富度和坚固的阴谋;(2)土壤种子库的种子密度在放牧草原3 475±519·m - 2种子,714年20 241±1种子·m - 2块坚固的6年和28 777±3 946种子·m - 2块坚固的12年,并在篱笆情节显著高于放牧的土地;(3)的索引Shannon-Wiener和辛普森的物种多样性和Pielou擦伤了情节的均匀度1.36,0.68和0.56,分别和他们减少增加防护防护时间的情节;(4)垂直,大多数种子表层土中发现了0 ~ 2厘米的阴谋,但土壤种子库的种子密度在所有土壤层坚固情节明显高于放牧阴谋;(5)种子在一个明显的聚集分布格局在所有的情节,但空间放牧样地土壤种子库异质性显著高于围篱样地。
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来源期刊
干旱区研究
干旱区研究 Environmental Science-Water Science and Technology
CiteScore
2.50
自引率
0.00%
发文量
4294
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