The effects of agricultural management on selected soil properties of the arable soils in Tibet, China

Auteur(s) et Affiliation(s)



Description :
Based on the the soil survey conducted in the late 1980s, the AA. sampled in the summer of 2007 : 17 sites of the tillage (A) layer soils and 13 sites of soil profiles, including the tillage and subsoil layers from 3 types of arable land soils in Lhasa (alluvial soil, steppe soil, and meadow soil). At the same time, another 55 composite samples and core samples were taken from the grain-crop land, open vegetable land and greenhouse vegetable land of the alluvial soil. Selected soil properties were measured and compared to the soil survey data from the 1980s. The results showed that because of wind erosion and irrigation, the arable soils have become significantly more sandy since the late 1980s. Moreover, because of fertiliser application and acid precipitation, the soil pH and cation exchange capacity are significantly lower than in the late 1980s, thus leading to soil acidification and lower soil fertility. It is suggested that the changes in the soil properties were mainly due to the application of manure and the intensity of cultivation.


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2012, vol. 93, p. 1-8, nombre de pages : 8, Références bibliographiques : 1 p.

Date :
2012

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena