[Phosphatase activities in rice-planting meadow brown soil and their responses to fertilization].
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.
Shen
Jupei
J
Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. shenjupei@sohu.com
Chen
Zhenhua
Z
Chen
Lijun
L
D005308:Fertilizers; D012275:Oryza / Q000254:growth & development*; D010727:Phosphoric Diester Hydrolases / Q000378:metabolism; D010744:Phosphoric Monoester Hydrolases / Q000378:metabolism*; D044345:Phosphoric Triester Hydrolases / Q000378:metabolism; D006109:Poaceae / Q000254:growth & development; D012987:Soil / Q000032:analysis*
D005308:Fertilizers; D012987:Soil; D010744:Phosphoric Monoester Hydrolases; D010727:Phosphoric Diester Hydrolases; D044345:Phosphoric Triester Hydrolases