Phosphatase activities in rice-planting meadow brown soil and their responses to fertilization
Shen, J.; Chen, Z.; Chen, L.
Ying Yong Sheng Tai Xue Bao 16(3): 583-585
2005
ISSN/ISBN: 1001-9332 PMID: 15943382 Document Number: 590849
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.