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Published online 31 May 2006
Published in J Environ Qual 35:1142-1150 (2006)
DOI: 10.2134/jeq2005.0194
© 2006 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
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Organic Phosphorus Fractions in Organically Amended Paddy Soils in Continuously and Intermittently Flooded Conditions

Changming Yanga,*, Linzhang Yangb and Lee Jianhuaa

a Key Laboratory of Yangtze Aquatic Environment, Ministry of Education, The College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, P.R. China
b Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, P.R. China


Figure 1
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  		Fig. 1. A flow diagram for the soil organic P fractionation procedure by a modified Bowman and Cole (1978) method.

 

Figure 2
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  		Fig. 2. Microbial biomass P (a) and microbial biomass C (b) as affected by fertilization treatments in intermittently ({blacksquare}) and continuously ({square}) flooded paddy soils, respectively. The terms SM, WS, SM + WS, and CK indicate swine manure, wheat straw, swine manure plus wheat straw, and chemical fertilization treatments, respectively. Bars represent standard errors.

 

Figure 3
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  		Fig. 3. Alkaline phosphatase activity (a) and neutral phosphatase activity (b) as affected by fertilization treatments in intermittently ({blacksquare}) and continuously ({square}) flooded paddy soils, respectively. The terms SM, WS, SM + WS, and CK indicate swine manure, wheat straw, swine manure plus wheat straw, and chemical fertilization treatments, respectively. Bars represent standard errors.

 




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Copyright © 2006 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.