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Titolo:
Soil nutrients in relation to land use and landscape position in the semi-arid small catchment on the loess plateau in China
Autore:
Wang, J; Fu, BJ; Qiu, Y; Chen, LD;
Indirizzi:
Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Dept Syst Ecol, Beijing, Peoples R China Chinese Acad Sci Beijing Peoples R China Ecol, Beijing, Peoples R China
Titolo Testata:
JOURNAL OF ARID ENVIRONMENTS
fascicolo: 4, volume: 48, anno: 2001,
pagine: 537 - 550
SICI:
0140-1963(200108)48:4<537:SNIRTL>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
TALLGRASS PRAIRIE; NITROGEN LIMITATION; ORGANIC-MATTER; CARBON STORAGE; HILLY AREA; WHEAT; CULTIVATION; TEMPERATURE; VARIABILITY; MYCORRHIZA;
Keywords:
soil nutrient; land use type; landscape position; soil deterioration index; loess plateau of China;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
52
Recensione:
Indirizzi per estratti:
Indirizzo: Fu, BJ Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Dept Syst Ecol, POB 2871, Beijing, Peoples R China Chinese Acad Sci POB 2871 Beijing Peoples R China Peoples R China
Citazione:
J. Wang et al., "Soil nutrients in relation to land use and landscape position in the semi-arid small catchment on the loess plateau in China", J ARID ENV, 48(4), 2001, pp. 537-550

Abstract

Characterizing spatial variability of soil nutrients in relation to site properties, including climate, land use, landscape position and other variables, is important for understanding how ecosystems work and assessing the effects of future land use change on soil nutrients. In order to assess the effects of land use and landscape position on soil nutrients consisting of soil organic matter (SOM), total N (TN), total P (TP), available N (AN) andavailable P (AP), soil samples were collected in August and October 1998 and July 1999 from three transects in a small catchment on the loess plateau, China. The three transects consisted of typical land use structure from the top to foot of hillslope in the study area: fallow land - cropland - woodland - orchard (Tl), fallow land - shrub land - fallow land - cropland - woodland - orchard (T2) and intercropping land - woodland (T3). Significant differences among land uses were found for SOM, TN and AN. Woodland, shrub land and grassland had the higher levels for them compared to fallow land and cropland. Use of soil deterioration index showed that soils deterioratedmoderately ( - 17.05%) under orchard and seriously (ranging from -29.91% to -20.32%) under fallow land, cropland and intercropping land, while soils had no deterioration ( - 0.74%) under shrubland and ( - 0.69%) grassland. This study indicated that the cultivated hilly lands must be abandoned before a critical minimum SOM of 0.492%. Soil nutrient responses to landscape positions were variable depending on transect and the location of land use types. The highest levels in SOM, TN and AN were observed at middle slope position on T1, while they occurred at foot slope position on T3. However, an increasing trend from upper slope to foot slope for five nutrients were found on T2. (C) 2001 Academic Press.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/09/20 alle ore 12:29:12