Changes of vegetation and soil nutrient on windward slope of dune under sand barrier environment in Mu Us Sandy Land

doi:10.7522/j.issn.1000-694X.2021.00051

Journal of Desert Research ›› 2021, Vol. 41 ›› Issue (5): 140-146.DOI: 10.7522/j.issn.1000-694X.2021.00051

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Changes of vegetation and soil nutrient on windward slope of dune under sand barrier environment in Mu Us Sandy Land

Lin Shi¹(), Yuxing Zhao¹, Eerdun Hasi², Ping Zhang³(), Yingjun Xu², Zhuoran Wang²

^1.Scientific Research Institute of Forestry and Grassland Desertification Control in Ordos City，Ordos 017100，Inner Mongolia，China
^2.School of Natural Resources，Faculty of Geographic Sciences，Beijing Normal University，Beijing 100875，China
^3.College of Agriculture，Ningxia University，Yinchuan 751500，China

Received:2020-12-28 Revised:2021-04-23 Online:2021-09-20 Published:2021-09-23
Contact: Ping Zhang

Abstract

Abstract:

Sand barrier plays an important role in the ecological construction such as sand fixation， vegetation restoration and soil improvement. Vegetation survey and soil nutrient test analysis were carried out on the sand dune windward slopes （with mobile dune as a comparison） for 6， 8， 10， 11 and 12 years of sand dune sand barrier in Mu US Sandy Land. The results showed that with the increase of the sand barrier setting age， the vegetation cover of the dune windward slope， as well as the value of soil organic matter， whole nitrogen content and pH values， changed significantly， but there was no significant change in total phosphorus total potassium. After setting the sand barrier for 8 years， the soil organic matter and total nitrogen content in the depth of 0-30 cm in the windward slope of the dunes were significantly higher （P<0.05） than that of mobile sand dune，and up to 10 to 11 years of sand barrier setting， the vegetation cover ， the organic matter and total nitrogen content of all layers of soil in depth of 0-80 cm all reached a peak， after that， organic matter and total nitrogen tends to be stable or decrease slightly at a depth of 0-30 cm， and decrease significantly within a depth of 30-80 cm. There is a significant linear positive correlation between the total vegetation cover， soil organic matter content and whole nitrogen content in the sand barrier environment， and the soil pH values decrease linearly with the increase of organic matter content. The sand barrier of 10 years has the greatest effect on soil improvement and vegetation restoration， and then it shows a downward trend. It is suggested that the artificial vegetation should be regenerated after 10 years with sand barrier under the premise of maintaining its sand-fixing effect.

Key words: Mu Us Sandy Land, Salix psammophila sand barrier, sand dunes, soil nutrients

CLC Number:

S288

Lin Shi, Yuxing Zhao, Eerdun Hasi, Ping Zhang, Yingjun Xu, Zhuoran Wang. Changes of vegetation and soil nutrient on windward slope of dune under sand barrier environment in Mu Us Sandy Land[J]. Journal of Desert Research, 2021, 41(5): 140-146.

Figures/Tables 8

References 23

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沙障设置年长	植被总盖度/%	物种	平均高度 /cm	平均冠幅 /cm	平均基径 /mm	密度 /（株/100m²）	样地内其他植物种
12年	37	沙柳	100.4	70.0	6.8	41	虫实
		杨柴	65.4	88.9	9.4	25
		油蒿	45.5	—	—	227
11年	46	沙柳	171.4	139.0	7.2	48	虫实、狗尾草、细叶苦菜、沙米
		杨柴	80.8	88.9	9.9	65
		油蒿	20.0	—	—	22
10年	55	沙柳	158.8	78.6	7.0	200	虫实
		杨柴	92.1	95.4	11.5	42
		油蒿	33.6	—	—	38
8年	45	沙柳	135.5	78.0	6.9	38	虫实、沙竹、沙米
		杨柴	72.6	84.1	10.6	19
		油蒿	64.0	—	—	39
6年	39	沙柳	129.5	76.5	6.3	32	无
		杨柴	73.0	99.3	11.8	26
		油蒿	48.2	—	—	350

沙障设置年长	植被总盖度/%	物种	平均高度 /cm	平均冠幅 /cm	平均基径 /mm	密度 /（株/100m²）	样地内其他植物种
12年	37	沙柳	100.4	70.0	6.8	41	虫实
		杨柴	65.4	88.9	9.4	25
		油蒿	45.5	—	—	227
11年	46	沙柳	171.4	139.0	7.2	48	虫实、狗尾草、细叶苦菜、沙米
		杨柴	80.8	88.9	9.9	65
		油蒿	20.0	—	—	22
10年	55	沙柳	158.8	78.6	7.0	200	虫实
		杨柴	92.1	95.4	11.5	42
		油蒿	33.6	—	—	38
8年	45	沙柳	135.5	78.0	6.9	38	虫实、沙竹、沙米
		杨柴	72.6	84.1	10.6	19
		油蒿	64.0	—	—	39
6年	39	沙柳	129.5	76.5	6.3	32	无
		杨柴	73.0	99.3	11.8	26
		油蒿	48.2	—	—	350

沙障设置年长	有机质/（g·kg^-1）	全氮/（g·kg^-1）	全磷/（g·kg^-1）	全钾/（g·kg^-1）	pH值
12年	1.28 ±0.83	0.051±0.019	2.79 ±0.26	28.52 ±1.74	8.10±0.15
11年	1.97 ±0.79	0.061±0.015	2.76 ±0.40	28.37 ±0.97	8.21±0.07
10年	2.29 ±0.39	0.058±0.017	2.83 ±0.23	28.07 ±1.31	7.44±0.17
8年	1.68 ±0.32	0.053±0.017	2.82 ±0.18	27.70 ±1.80	7.55±0.17
6年	0.98 ±0.32	0.038±0.014	2.85 ±0.11	27.94 ±1.33	8.16±0.09
裸露沙丘地	0.73 ±0.13	0.028±0.008	2.85 ±0.16	28.46 ±1.44	8.62±0.21

沙障设置年长	有机质/（g·kg^-1）	全氮/（g·kg^-1）	全磷/（g·kg^-1）	全钾/（g·kg^-1）	pH值
12年	1.28 ±0.83	0.051±0.019	2.79 ±0.26	28.52 ±1.74	8.10±0.15
11年	1.97 ±0.79	0.061±0.015	2.76 ±0.40	28.37 ±0.97	8.21±0.07
10年	2.29 ±0.39	0.058±0.017	2.83 ±0.23	28.07 ±1.31	7.44±0.17
8年	1.68 ±0.32	0.053±0.017	2.82 ±0.18	27.70 ±1.80	7.55±0.17
6年	0.98 ±0.32	0.038±0.014	2.85 ±0.11	27.94 ±1.33	8.16±0.09
裸露沙丘地	0.73 ±0.13	0.028±0.008	2.85 ±0.16	28.46 ±1.44	8.62±0.21

项目	有机质OM	全氮TN	全磷TP	全钾TK
有机质OM	1
全氮TN	0.970^**	1
全磷TP	0.078	0.023	1
全钾TK	0.194	0.258	-0.442	1

Changes of vegetation and soil nutrient on windward slope of dune under sand barrier environment in Mu Us Sandy Land

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