Alterations in soil aggregate stability of a tropical Ultisol as mediated by changes in land use

被引:9
作者
Leelamanie, Dewpura A. L. [1 ]
Mapa, Ranjith B. [2 ]
机构
[1] Univ Ruhuna, Fac Agr, Dept Soil Sci, Mapalana, Kamburupitiya, Sri Lanka
[2] Univ Peradeniya, Fac Agr, Dept Soil Sci, Peradeniya, Sri Lanka
关键词
aggregate stability; land uses; soil organic carbon; Sri Lanka; ORGANIC-MATTER; WATER-FLOW; HYDROPHYSICAL PARAMETERS; SANDY SOIL; FRACTIONS; CARBON;
D O I
10.1515/biolog-2015-0168
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Aggregate stability is considered to be an appropriate indicator of the relative resistance of soils to detachment by the forces of wind or water. Structural weakness and high rates of erosion in red yellow podzolic (RYP) soils of Matara district are, in general, discussed as prominent problems in intermediate scale agricultural estates. The present study was conducted to ascertain the impacts incurred on the stability of soil aggregates by the alteration of natural forests to agricultural lands, using tea, rubber, and tea/rubber intercropping soils. Surface soils were taken to assess the wet and dry aggregate stabilities, bulk density (DB), clay content, and soil organic carbon (SOC) content. The DB of rubber (1.62 g cm(-3)) and tea/rubber intercropping (1.61 g cm(-3)) soils differed significantly (P < 0.05) from forest (1.33 g cm(-3)) and tea (1.48 g cm(-3)) soils. Rubber and tea/rubber intercropping soils had significantly high clay contents as well. Forest soil had the highest SOC content, whereas tea, tea/rubber, and rubber soils respectively showed 45, 50, and 70% decline. The aggregate size distribution did not differ noticeably in forest, tea, and tea/rubber intercropping soils. However, rubber soils with the least SOC content had a lower percentage of macro-aggregates (> 0.5 mm) and significantly low wet and dry mean weight diameters. Above results revealed that the changes in land use negatively influenced the SOC pool and the stability of aggregates. Significant and consistent relationship between the carbon stocks and the wet and dry stabilities of aggregates has not been noted. It was clear that the content of SOC would not be considered as the solitary factor that affects wet and dry stabilities of aggregates in the tested Rhodudults.
引用
收藏
页码:1444 / 1449
页数:6
相关论文
共 22 条
[1]   The effects of organic inputs over time on soil aggregate stability - A literature analysis [J].
Abiven, Samuel ;
Menasseri, Safya ;
Chenu, Claire .
SOIL BIOLOGY & BIOCHEMISTRY, 2009, 41 (01) :1-12
[2]   Soil microbial parameters and stability of soil aggregate fractions under different grassland communities on the Loess Plateau, China [J].
An, Shao-shan ;
Mentler, Axel ;
Acosta-Martinez, Veronica ;
Blum, Winfried E. H. .
BIOLOGIA, 2009, 64 (03) :424-427
[3]  
[Anonymous], [No title captured]
[4]   METHODS FOR PHYSICAL SEPARATION AND CHARACTERIZATION OF SOIL ORGANIC-MATTER FRACTIONS [J].
CAMBARDELLA, CA ;
ELLIOTT, ET .
GEODERMA, 1993, 56 (1-4) :449-457
[5]   Organic matter influence on clay wettability and soil aggregate stability [J].
Chenu, C ;
Le Bissonnais, Y ;
Arrouays, D .
SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 2000, 64 (04) :1479-1486
[6]   Soil Aggregates and Associated Organic Matter under Conventional Tillage, No-Tillage, and Forest Succession after Three Decades [J].
Devine, Scott ;
Markewitz, Daniel ;
Hendrix, Paul ;
Coleman, David .
PLOS ONE, 2014, 9 (01)
[7]   Soil organic carbon pool under native tree plantations in the Caribbean lowlands of Costa Rica [J].
Jimenez, J. J. ;
Lal, R. ;
Leblanc, H. A. ;
Russo, R. O. .
FOREST ECOLOGY AND MANAGEMENT, 2007, 241 (1-3) :134-144
[8]   Initial water repellency affected organic matter depletion rates of manure amended soils in Sri Lanka [J].
Leelamanie, D. A. L. .
JOURNAL OF HYDROLOGY AND HYDROMECHANICS, 2014, 62 (04) :309-315
[9]   Water stable aggregates of Japanese Andisol as affected by hydrophobicity and drying temperature [J].
Leelamanie, D. A. L. ;
Karube, Jutaro .
JOURNAL OF HYDROLOGY AND HYDROMECHANICS, 2014, 62 (02) :97-100
[10]   Stability analysis of aggregates in relation to the hydrophobicity of organic manure for Sri Lankan Red Yellow Podzolic soils [J].
Leelamanie, D. A. L. ;
Karube, Jutaro ;
Samarawickrama, U. I. .
SOIL SCIENCE AND PLANT NUTRITION, 2013, 59 (05) :683-691