Phosphatase activities in rice planting meadow brown soil and their responses to fertilization

Abstract

Abstract: This study is aimed to investigate the activities of phosphomonoesterase (acid,neutral,and alkaline),phosphodiesterase and phosphotriesterase in a rice planting meadow brown soil at the lower reach of Liao River,and their responses to different fertilization treatments.The results showed that there was no significant difference in soil total P and organic P contents among all treatments,but soil available P content was significantly higher in treatment OM than in other treatments.Soil acid and neutral phosphomonoesterase had a higher activity than alkaline phosphomonoesterase and phosphodiesterase,while phosphotriesterase had the lowest activity.No significant difference was found in phosphatase activities between different fertilization treatments.Soil acid phosphomonoesterase activity had a significant correlation with soil total P and available P contents,while soil phosphodiesterase activity significantly correlated with soil organic P content.

Key words: Fertilization, Phosphomonoesterase, Phosphodiesterase, Phosphotriesterase, Meadow brown soil

CLC Number:

S154.2

SHEN Jupei, CHEN Zhenhua, CHEN Lijun . Phosphatase activities in rice planting meadow brown soil and their responses to fertilization[J]. Chinese Journal of Applied Ecology, 2005, 16(3): 583-585.

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