Changes in soil nutrient and enzyme activities under different vegetations in the Loess Plateau area, Northwest China

Auteur(s) et Affiliation(s)

WANG, B.

State Key Lab. of Soil Erosion and Dryland Farming on Loess Plateau, Northwest Univ. Shaanxi, Yangling, Chine

Inst. of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Shaanxi, Yangling, Chine

School of Geography, Normal Univ., Beijing, Chine

XUE, S.

State Key Lab. of Soil Erosion and Dryland Farming on Loess Plateau, Northwest Univ. Shaanxi, Yangling, Chine

Inst. of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Shaanxi, Yangling, Chine

LIU, G.B.

State Key Lab. of Soil Erosion and Dryland Farming on Loess Plateau, Northwest Univ. Shaanxi, Yangling, Chine

Inst. of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Shaanxi, Yangling, Chine

ZHANG, G.H.

State Key Lab. of Soil Erosion and Dryland Farming on Loess Plateau, Northwest Univ. Shaanxi, Yangling, Chine

Inst. of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Shaanxi, Yangling, Chine

School of Geography, Normal Univ., Beijing, Chine

LI, G.

Dep. of Geography and Environmental Studies, California State Univ., Hayward, Etats-Unis

REN, Z.P.

School of Geography, Normal Univ., Beijing, Chine

Description :
This study examined the changes in soil properties and soil quality 30 years after cultivated farmland was restored back to forest land in Loess Plateau, China. Specifically, organic matter, total nitrogen (N) and phosphorus (P), available N, P and Potassium (K) contents and enzyme activities in soils were tested and analyzed. The study showed that after 30 years of restoration, nutrients content in the soil of mixed forest of black locust and amorpha increased significantly. However, nutrients content in the soil of mixed forest of Chinese pine and amorpha decreased. The study also found that the organic matter content was relatively low in the restored soils, compared with not-restored land. This may be caused by the high enzyme activity per unit of organic carbon in the soils of the study area which tends to help decompose and therefore decrease the organic matter in soil.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2012, vol. 92, p. 186-195, nombre de pages : 10, Références bibliographiques : 40 ref.

Date :
2012

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

Langue :
Anglais