[1]陈国靖,蔡进军,马璠,等.宁夏黄土丘陵区典型林草植被类型对土壤水稳性团聚体的影响[J].水土保持研究,2018,25(05):49-53,60.
 CHEN Guojing,CAI Jinjun,MA Fan,et al.Effects of Typical Forest and Grass Vegetation Structure on Soil Water-Stable Aggregates in Hilly Loess Plateau of Ningxia Province[J].,2018,25(05):49-53,60.
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宁夏黄土丘陵区典型林草植被类型对土壤水稳性团聚体的影响()
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《水土保持研究》[ISSN:1005-3409/CN:61-1272/P]

卷:
25卷
期数:
2018年05期
页码:
49-53,60
栏目:
出版日期:
2018-09-06

文章信息/Info

Title:
Effects of Typical Forest and Grass Vegetation Structure on Soil Water-Stable Aggregates in Hilly Loess Plateau of Ningxia Province
作者:
陈国靖1 蔡进军2 马璠2 许浩2 董立国2 韩新生2 李生宝2
1. 宁夏大学 农学院, 银川 750021;
2. 宁夏农林科学院 荒漠化治理研究所, 银川 750002
Author(s):
CHEN Guojing1 CAI Jinjun2 MA Fan2 XU Hao2 DONG Liguo2 HAN Xinsheng2 LI Shengbao2
1. College of Agronomy, Ningxia University, Yinchuan 750021, China;
2. Institute of Desertification Control, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China
关键词:
黄土丘陵区林草植被结构土壤水稳性团聚体
Keywords:
loess hilly regionforest and grass vegetation structuresoil water stable aggregates
分类号:
S714.2
摘要:
土壤团聚体是土壤的基础单元结构,是研究土壤结构、抗侵蚀能力的重要指标。对宁夏黄土丘陵区典型林草植被类型下的水稳性团聚体进行了测定,分析了不同林草植被类型下土壤水稳性团聚体的差异。结果表明:(1)混交林地的水稳性大团聚体比例,MWD,GMD,D值较山杏、山桃、沙棘等纯林大,说明混交林地土壤的结构最好,抗侵蚀能力最强;撂荒地的土壤水稳性团聚体稳定性的各指标值最小,土壤结构最差,抗侵蚀能力最差。(2)> 0.25 mm粒径水稳性团聚体含量林地大于撂荒地,上层土壤大于下层土壤,说明林地土壤结构较撂荒地稳定,上层土壤结构较下层稳定。(3)土壤分形维数D值苜蓿地大于林地,苜蓿地土壤受到人为因素后恢复年限短,土壤颗粒分散,土壤稳定性差。研究结果表明,林地——特别是混交林地土壤水稳性团聚体比苜蓿地和撂荒地好,对研究区土壤结构恢复有很好的效果。
Abstract:
Soil aggregates are the basic unit structure of soils and are important indexes for studying soil structure and anti-erosion ability. In this paper, the water-stable aggregates under typical forest-grassland vegetation types in the loess hilly region of Ningxia were measured, and the differences of soil water-stable aggregates under different vegetation types were analyzed. The results showed that:(1) the ratio of water-stable macro-aggregates, MWD, GMD and D were higher in mixed forest than in pure forests such as Prunus sibirica, Prunus davidiana and Hippophae rhamnoides, which indicated that the structure of soil in mixed forest was the best, and the soil had the strongest anti-erosion ability; the index value of stability of soil water-stable aggregates in abandoned land was the lowest, the soil structure was the worst, and the erosion resistance was the lowest; (2) the content of > 0.25 mm water-stable aggregates was greater in woodland than abandoned wasteland, and the that of upper soil was larger than that of the lower soil, indicating that soil structure of forest land was more stable than that of wasteland and the structure of upper soil was more stable than deeper layer; (3) the value of soil fractal dimension D was higher in alfalfa than in woodland. The alfalfa soil had short recovery period, scattered soil particles and poor soil stability after being influenced by human activities. Based on the experimental results, it can be seen that soil-water-stable aggregates in forest lands, especially in mixed forests, are better than those in Alfalfa and wasteland, and have a good effect on soil structure recovery in the study area.

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备注/Memo

备注/Memo:
收稿日期:2017-11-11;改回日期:2017-12-04。
基金项目:“十二五”国家科技支撑计划课题(2015BAC01B01);国家重点研发计划课题(2016YFC0501702);宁夏多功能林业分区域研究与示范项目(YES-16-12)
作者简介:陈国靖(1993-),女,内蒙古阿拉善人,硕士研究生,研究方向为黄土丘陵区流域生态修复。E-mail:595250858@qq.com
通讯作者:蔡进军(1976-),男,宁夏平罗人,硕士研究生,副研究员,研究方向为黄土丘陵区流域生态修复。E-mail:nxyccai@163.com
更新日期/Last Update: 1900-01-01