Effects of vegetation restoration on soil properties and vegetation attributes in the arid and semi-arid regions of China.
Effects of vegetation restoration on soil properties and vegetation attributes in the arid and semi-arid regions of China.
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DOI：
10.1016/j.jenvman.2023.118186
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发表时间：
2023-05
影响因子：
8.7
通讯作者：
Wenxin Zhou;Changjia Li;Shuai Wang;Zhuobing Ren;L. Stringer
中科院分区：
文献类型：
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作者：
Wenxin Zhou;Changjia Li;Shuai Wang;Zhuobing Ren;L. Stringer
在扭转荒漠化和恢复退化土地这一目标的驱动下，中国在旱地实施了一系列植被恢复做法（如种植和围栏）。研究植被恢复和环境因子对土壤养分的影响，对优化植被恢复途径具有重要意义。然而，由于缺乏长期实地监测数据，对这一专题的定量评价不足。本研究评价了半干旱荒漠区桑迪草原恢复和沙丘固定以及干旱荒漠区天然植被和人工植被恢复的效果。研究考虑了土壤和植物特征，使用了位于中国旱地半干旱地区的奈曼研究站和干旱地区的沙坡头研究站的长期（2005-2015年）数据。结果表明，桑迪草原土壤养分含量、植被生物量和土壤有机质积累速率均高于固定沙丘和流动沙丘。1956年以来，油蒿自然植被的土壤养分含量和植被生物量均高于人工恢复的油蒿。人工恢复对土壤有机质、全氮和枯落物生物量的积累速率高于自然恢复。土壤水分通过影响植被间接影响土壤有机质。草本植物多样性是半干旱奈曼沙漠土壤有机质变异的主要影响因子，灌木多样性是干旱沙坡头沙漠土壤有机质变异的主要影响因子。这些结果表明，半干旱荒漠的固沙和干旱荒漠的植被恢复有利于土壤养分的积累和植被的改善，自然恢复优于人工恢复。研究结果可用于制定可持续的植被恢复策略，如鼓励自然恢复，考虑当地的资源限制，并优先恢复灌木在干旱地区有限的水。
Driven by the goal of reversing desertification and recovering degraded lands, a wide range of vegetation restoration practices (such as planting and fencing) have been implemented in China's drylands. It is essential to examine the effects of vegetation restoration and environmental factors on soil nutrients to optimize restoration approaches. However, quantitative evaluation on this topic is insufficient due to a lack of long-term field monitoring data. This study evaluated the effects of sandy steppe restoration and sand dune fixation in the semi-arid desert, and natural and artificial vegetation restoration in the arid desert. It considered soil and plant characteristics using long-term (2005–2015) data from the Naiman Research Station located in the semi-arid region and Shapotou Research Station in the arid region of China's drylands. Results showed the sandy steppe had higher soil nutrient contents, vegetation biomass and rate of accumulating soil organic matter (OM) than the fixed dunes and moving dunes. Soil nutrient contents and vegetation biomass of the natural vegetation ofArtemisia ordosicawere higher than those of the artificial restoration ofArtemisia ordosicasince 1956. Artificial restoration had a higher rate of accumulating soil OM, total nitrogen (TN) and grass litter biomass than natural restoration. Soil water indirectly affected soil OM by affecting vegetation. Grass diversity was the main influencing factor on soil OM variance in the semi-arid Naiman desert while shrub diversity was the main factor in the arid Shapotou desert. These findings indicate that sand fixation in the semi-arid desert and vegetation restoration in the arid desert bring benefits for soil nutrient accumulation and vegetation improvement, and that natural restoration is preferable to artificial restoration. Results can be used to formulate sustainable vegetation restoration strategies, such as encouraging natural restoration, considering local resource constraints, and giving priority to restoring shrubs in arid areas with limited water.