Effects of establishing perennial artificial grasslands on the availability of soilphosphorus in agro-pastoral transitional zones, Northern China

Abstract

Abstract: The effects of establishing artificial grassland on the availability of soil phosphorus in agro-pastoral transitional zone in Northern China was studied on four year old artificial grasslands of Agropyron cristatum, Bromus riparius, Bromus inermis, Leymus chinensis and Medicago sativa. The soil total organic carbon content in artificial grassland was higher than in natural steppe soils, while the contents of total phosphorus and Ca-P were significantly lower and the content of available phosphorus was less than 3 mg/kg. The proportion of inorganic phosphorus to total phosphorus in artificial grassland was significantly lower than that in natural steppe and O-P could not be detected in artificial grassland except for A. cristatum. Correlation analysis showed that the content of available phosphorus was significantly correlated with all forms of inorganic phosphorus, indicating that they were all the main sources of phosphorus to plants in calcareous soils with lower available phosphorus.

CLC Number:

GUO Yan-Jun, NI Yu, HAN Jian-guo. Effects of establishing perennial artificial grasslands on the availability of soilphosphorus in agro-pastoral transitional zones, Northern China[J]. Acta Prataculturae Sinica, 2010, 19(2): 169-174.

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