不同类型植被对高寒沙区土壤改良效果的差异分析

发布时间：2018-07-06 12:34

  本文选题：高寒沙区 + 植被类型　； 参考：《土壤通报》2016年01期

【摘要】：以沙珠玉治沙试验林场内人工植被恢复的长期定位监测为基础,通过分析30 a生的6个植被类型区(青杨、柠条、乌柳、沙棘、柽柳、赖草)以及2个对照区(农田、流动沙区)0~30 cm土壤机械组成、p H值、有机质及主要养分等理化性质指标,明确了高寒沙区不同植被类型对土壤改良的效果差异。结果表明:(1)各类型区在植被恢复30 a后,土壤质地得到极大改良,土壤养分含量显著提高(P0.05),但表层土壤的p H变异性较小,0~5 cm表层土壤的恢复效果明显好于5~30 cm层;(2)植被对土壤改良顺序为柠条青杨沙棘赖草乌柳柽柳;(3)柠条和沙棘林适宜在高寒沙区推广种植,并且可以采取适当抚育管理措施,以实现高寒沙区林场的可持续发展。
[Abstract]:Based on the long-term monitoring of artificial vegetation restoration in Shazhouyu sand control forest farm, six vegetation types (Populus korshinskii, Caragana korshinskii, Salix korshinskii, Hippophae rhamnoides, Tamarix chinensis, Leymus chinensis) and two control areas (farmland) were analyzed. The physical and chemical properties of soil mechanical composition (pH), organic matter and main nutrients in 30 cm soil in mobile sand area were determined, and the effects of different vegetation types on soil improvement in alpine sand region were determined. The results showed that: (1) after vegetation restoration for 30 years, the soil texture was greatly improved. The soil nutrient content was significantly increased (P0.05), but the soil pH variability of surface soil was significantly better than that of 5cm soil layer (P 0.05). (2) the order of vegetation to soil improvement was Caragana korshinskii, Hippophae rhamnoides and Tamarix chinensis; (3) Caragana korshinskii and Sands. The spinous forest is suitable for planting in alpine and sandy areas. In order to realize the sustainable development of forest farm in alpine sand area, appropriate tending and management measures can be taken.
【作者单位】： 中国林业科学研究院荒漠化研究所;
【基金】：国家“十二五”科技支撑课题(2012BAD16B0105)资助
【分类号】：S156
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本文编号：2102808