TA Fei,DONG Zhibao,NAN Weige,et al.Study on the Characteristics of Aeolian Sandy Soils in Plantation and Natural Stand of Sabina vulgaris[J].Research of Soil and Water Conservation,2021,28(02):80-87.
沙地柏人工林和天然林风沙土特性研究
- Title:
- Study on the Characteristics of Aeolian Sandy Soils in Plantation and Natural Stand of Sabina vulgaris
- 文章编号:
- 1005-3409(2021)02-0080-08
- 分类号:
- S152
- 文献标志码:
- A
- 摘要:
- 为了深入了解固沙植被恢复对土壤理化性质的影响,以毛乌素沙地东南缘沙地柏人工林和天然林为研究对象,通过收集灌丛下5个土层(0—100 cm)的土壤样品,分析其土壤颗粒组成及8个理化指标,探讨了沙地柏生长对风沙土特性的影响。结果表明:研究区土壤粒度组成以砂粒(体积分数97.09%)为主,其次是粉粒和黏粒,并形成以中砂(50.26%)为主的单峰,土壤弱碱性,其养分含量整体水平低,且具有明显表层聚集现象。土壤养分含量与土壤粒度之间存在良好的相关性,表现为土壤有机质、速效钾和盐分含量与细沙物质(粒径<100 μm)含量呈线性正相关,与粗砂物质(100～500 μm)呈线性负相关。沙地柏生长对风沙土改良效果呈现出人工林16 a树龄优于7 a树龄,天然林地迎风坡优于背风坡。整体上,造林时间增加土壤颗粒的粗细分配趋于良好态势发展,土壤结构优化,土地荒漠化进程减缓。因此,沙地柏可作为毛乌素沙地生态恢复工程的优良灌木。
- Abstract:
- To better understand the effect of vegetation restoration on the physical and chemical properties of aeolian soils, the artificial forest and natural forest of Sabina vulgaris in the southeast edge of Mu Us Dune field were taken as the research objects. Through collecting soil samples of 5 soil layers(0—100 cm)in the forest lands, the composition of soil particles and 8 physical and chemical indexes under the shrub were analyzed, and the improvement effect of vegetation restoration on aeolian sandy soil was discussed. The results showed that the grain size of the soil in the study area was mainly composed of sand(97.09%), followed by silt and clay; the soil was weak alkaline, and low nutrient content and obvious surface accumulation(0—40 cm); there was a good correlation between soil nutrient content and soil particle size, which showed that the contents of soil organic matter, available potassium, TOC and salinity had a linear positive correction with the content of fine sand material(mean diameter<100 μm), whereas a negative linear relationship with the content of coarse sand material(100～500 μm)was found. Therefore, this study also demonstrated that the improvement effect of 16-year-old plantation was better than that of 7-year-old plantation, and the improvement effect of windward slope of natural stand was better than leeward slope. On the whole, with the increase of afforestation time, the distribution of soil particle size tends to be better, the soil structure is optimized and the process of land desertification is slowed down. Therefore, Sabina vulgaris can be used as a good shrub in ecological restoration project in Mu Us Dune field.
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备注/Memo
收稿日期:2019-08-03 修回日期:2020-06-18
资助项目:中国博士后资助项目(2017M613049); 陕西省博士后资助项目(2017BSHEDZZ15); 中央高校基本科研业务费专项资金项目(GK201703050); 德国政府贷款陕西榆林长城沿线沙地治理及生物多样性保护项目(H152041008)
第一作者:拓飞(1966—),男,陕西横山人,高级工程师,学士,主要从事造林绿化、生态恢复研究等工作。E-mail:1350471766@qq.com
通信作者:南维鸽(1979—),女,陕西兴平人,副研究员,博士,主要从事荒漠生态研究。E-mail:nanweige@snnu.edu.cn