Effects of Land Use Types on Soil Aggregate Characteristics in Hilly-gully Region of Loess Plateau

LI Juan1; 2

doi:10.13870/j.cnki.stbcxb.2017.01.041

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Effects of Land Use Types on Soil Aggregate Characteristics in Hilly-gully Region of Loess Plateau

更新时间：2025-03-12

- Effects of Land Use Types on Soil Aggregate Characteristics in Hilly-gully Region of Loess Plateau
- Vol. 31, Issue 1, Pages: 248-253(2017)
- 作者机构：
  
  1. 陕西省土地工程建设集团有限责任公司,西安,710075
  2. 西北农林科技大学林学院，陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2017.01.041
  CLC： S152.4;S157.4
- Published：2017
- 稿件说明：
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LI Juan1, 2. Effects of Land Use Types on Soil Aggregate Characteristics in Hilly-gully Region of Loess Plateau[J]. 2017, 31(1): 248-253.
DOI：

LI Juan1, 2. Effects of Land Use Types on Soil Aggregate Characteristics in Hilly-gully Region of Loess Plateau[J]. 2017, 31(1): 248-253. DOI： 10.13870/j.cnki.stbcxb.2017.01.041.

摘要

以研究黄土高原丘陵沟壑区复垦土地在不同利用方式下对土壤团聚体的影响，力求为提高复垦土地土壤稳定性及生产性能提供科学依据。研究陕西延安南泥湾沟壑区退化耕地整治复垦后，以5种不同的土地利用方式分别为林地（F处理）、水稻（R处理）、玉米（M处理）、蔬菜（V处理）及荒地（CK处理）。测定分析干筛法和湿筛法0—40 cm土层土壤＞0.25 mm团聚体分布、平均质量直径（WMD）、几何平均直径（GMD）、团聚体破坏率（PAD）和分形维数（D）。结果表明：（1）各处理在0—40 cm各土层土壤团聚体数量及大小均显著优于CK处理，各处理干筛下0—40 cm土层＞0.25 mm团聚体含量（DR0.25）和湿筛下该团聚体含量（WR0.25）随着土壤土层深度的增加呈现相反的趋势；（2）干筛法和湿筛法0—40 cm土层各处理土壤平均重量直径（MWD）和几何平均直径（GMD）的平均值大小顺序均呈现F处理>R处理>M处理>V处理＞CK处理，F处理和R处理对增加土壤团聚体较其它处理效果显著；（3）湿筛法分析表明，各处理土壤团聚体破坏率（PAD）在0—40 cm土层内均表现出近似“Z”字形趋势，各处理显著低于CK；（4）各处理的分形维数（D）在0—40 cm土层平均值大小顺序为F处理

Abstract

The effects of reclaimed land on soil aggregates under different land use patterns in the hilly-gully regions of Loess Plateau were studied to provide the scientific basis for improving soil stability and productive performance of reclaimed land. Five different land use types after reclamation of degraded cultivated land

included forestland (F treatment)

rice (R treatment)

maize (M treatment)

vegetable (V treatment) and wasteland (CK treatment)

were studied in the Nanniwan gully area of Yan'an

Shaanxi Province. The mean weight diameter (WMD)

geometric mean diameter (GMD)

aggregate processing damage rate (PAD) and fractal dimension (D) of >0.25 mm aggregates in wet sieve method and dry sieve of 0 ~ 40 cm soil layer soil were measured. The results showed that: (1)The number and size of soil aggregates in 0-40 cm soil layer were significantly better than those in CK treatment. The content of >0.25 mm aggregate (DR0.25) and (WR0.25) in 0-40 cm soil layer showed the opposite trend with the increase of soil depth. (2)The order of mean weight diameter (MWD) and geometric mean diameter (GMD) of soil treated by dry sieve method and wet sieve method was F treatment>R treatment>M treatment>V treatment>CK treatment

F treatment and R treatment on soil aggregates increased significantly than other treatments. (3)The results of wet sieve analysis showed that the PAD of soil aggregates in 0-40 cm soil layer showed similar Z-shaped trend

and the treatments were significantly lower than CK. (4)The fractal dimension (D) of each treatment was in the order of F treatment

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Related Institution

Key Laboratory of Aquatic Botany and Watershed Ecology,Wuhan Botanical Garden,Chinese Academy of Sciences

University of Chinese Academy of Sciences

State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Institute of Water and Soil Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling

Shandong Province Key laboratory of Plant Nutrition and Fertilizer, Shandong Academy of Agricultural Science

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