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生态学杂志 ›› 2023, Vol. 42 ›› Issue (6): 1348-1354.doi: 10.13292/j.1000-4890.202306.011

• 研究报告 • 上一篇    下一篇

不同恢复方式铁杆蒿群落土壤有机质和团聚体特征

秦笠,王宁*,陈佳敏,高鸿图   

  1. (陕西师范大学地理科学与旅游学院, 西安 710119)
  • 出版日期:2023-06-10 发布日期:2023-06-05

Characteristics of soil organic matter and aggregates in Artemisia sacrorum community with different restoration modes.

QIN Li, WANG Ning*, CHEN Jiamin, GAO Hongtu   

  1. (School of Geography and Tourism, Shaanxi Normal University, Xi’an 710119, China).

  • Online:2023-06-10 Published:2023-06-05

摘要: 以黄土丘陵区老荒坡为对照,探究人工恢复与退耕自然恢复铁杆蒿群落特征及对土壤有机质和团聚体的影响。结果表明:(1)恢复年限均为20年左右的人工恢复与退耕自然恢复坡面,铁杆蒿群落物种数和多样性无显著差异,但均明显低于老荒坡的物种数和多样性;(2)土壤有机质表现为人工恢复(29.68 g·kg-1)与老荒坡(29.25 g·kg-1)相近,但显著高于退耕自然恢复(14.34 g·kg-1);(3)土壤团聚体指标(水稳性大团聚体、平均重量直径与几何平均直径)均表现为老荒坡>人工恢复>退耕自然恢复;(4)土壤有机质、团聚体指标与物种多样性、总物种数、菊科物种数、禾本科物种数呈正相关。总之,恢复20年左右,人工恢复促进了团聚体和有机质的改善,但以老荒坡为参照,长期自然恢复可以形成更丰富的物种组成和更高的物种多样性,并对土壤团聚体有更好改善作用。


关键词: 物种多样性, 物种组成, 土壤特征, 黄土丘陵区

Abstract: With Artemisia sacrorum community on old field in a loess hilly region as the control, we investigated the characteristics of A. sacrorum community under artificial restoration and natural restoration after returning farmland and the effects of artificial restoration and natural restoration on soil organic matter and aggregates. The results showed that: (1) After about 20 years restoration, species number and diversity of A. sacrorum community had no significant differences between artificial restoration and natural restoration, but they were lower than those of A. sacrorum community in old field. (2) The content of soil organic matter in artificial restoration (29.68 g·kg-1) was similar to that of old field (29.25 g·kg-1), but significantly higher than that of natural restoration (14.34 g·kg-1). (3) Soil aggregate indicators (water-stable large aggregates, mean weight diameter and geometric mean diameter) were all in the order as old field > artificial restoration > natural restoration. (4) Soil organic matter and aggregate indicators were positively correlated with species diversity, total number of species, the number of Compositae species, and the number of Gramineae species. In summary, after 20 years restoration, artificial restoration accelerated the improvement of aggregates and organic matter. However, taking the old field as a reference, natural restoration could result in a richer species composition and higher species diversity, and have positive effects on soil aggregates with the extension of restoration duration.


Key words: species diversity, species composition, soil property, loess hilly region.