Plant Soil Environ., 2011, 57(6):251-257 | DOI: 10.17221/437/2010-PSE
Surface soil phosphorus and phosphatase activities affected by tillage and crop residue input amounts
- 1 Instituteof Applied Ecology, Chinese Academy of Sciences, Shenyang, P.R. China
- 2 Graduate University of the Chinese Academy of Sciences, Beijing, P.R. China
- 3 State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, P.R. China
- 4 State Experimental Station for Agro-Ecology, State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, P.R. China
The effects of tillage and residue input amounts on soil phosphatase (alkaline phosphomonoesterase ALP, acid phosphomonoesterase ACP, phosphodiesterase PD, and inorganic pyrophosphatase IPP) activities and soil phosphorus (P) forms (total P, organic P, and available P) were evaluated using soils collected from a three-year experiment. The results showed that no-till increased soil total and organic P, but not available P as compared to conventional tillage treatments. Total P was increased as inputs of crop residue increased for no-till treatment. There were higher ALP and IPP activities in no-till treatments, while higher PD activity was found in tillage treatments and tillage had no significant effect on ACP activity. Overall phosphatase activities increased with an increase of crop residue amounts. Soil total P was correlated negatively with PD activity and positively with other phosphatase activities. Organic P had a positive correlation with ACP activity, but a negative correlation with PD activity. Available P had no significant correlation with phosphatase activities. Our data suggests that no-till and residue input could increase soil P contents and enhance the activities of phosphatase.
Keywords: straw mulching and burying; wheat-maize rotation; soil nutrient; soil biochemical activities
Published: June 30, 2011 Show citation
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