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| Effect of biochar on phosphorus forms and phosphatase activity in red soil under different water conditions |
| Received:September 12, 2018 |
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| KeyWord:red soil;biochar;phosphorus form;phosphatase |
| Author Name | Affiliation | E-mail | | XIA Li-dan | College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
National Positioning Observation and Research Station of Red Soil Hill Ecosystem in Changting, Fujian, Fuzhou 350002, China | | | CAO Sheng | College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
National Positioning Observation and Research Station of Red Soil Hill Ecosystem in Changting, Fujian, Fuzhou 350002, China | | | ZHANG Hong | College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
National Positioning Observation and Research Station of Red Soil Hill Ecosystem in Changting, Fujian, Fuzhou 350002, China | | | HU Hua-ying | College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
National Positioning Observation and Research Station of Red Soil Hill Ecosystem in Changting, Fujian, Fuzhou 350002, China | | | ZHOU Chui-fan | College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
National Positioning Observation and Research Station of Red Soil Hill Ecosystem in Changting, Fujian, Fuzhou 350002, China | zhouchuifan@163.com | | MA Xiang-qing | College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
National Positioning Observation and Research Station of Red Soil Hill Ecosystem in Changting, Fujian, Fuzhou 350002, China | |
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| Abstract: |
| We undertook this study to explore the effects of biochar on the morphological transformation of phosphorus and phosphatase activity in red soil under different water conditions, and to provide a reference for soil phosphorus management and rational utilization of biochar. To test for effective phosphorus and phosphorus forms, soil with different water content (33%, 66%, 100%) and biochar addition (0, 0.5%, 2%) were set up. Available phosphorus and various phosphorus forms (Al-P, Ca-P, Fe-P, and O-P) in soil and the activities of soil acid phosphatase and alkaline phosphatase were measured. The results showed that the application of biochar significantly increased the available phosphorus content in the soil; in the early stage of cultivation, biochar mainly increased the insoluble Al-P content in the soil, which was mainly caused by the movement of soluble phosphorus from the biochar into the soil. In the later stages of cultivation, both water and biochar can activate Ca-P, Fe-P, and O-P in the soil to release more phosphorus. Biochar itself is alkaline and when added to the soil, it effectively neutralizes the acidity of the soil, so that the pH of the soil increased, (the pH was increased by 2.82~3.13 units), and the soil acid phosphatase activity decreased. In addition, the soil under flooded conditions showed reduced acid phosphatase and alkaline phosphatase activities. Although the addition of biochar can effectively increase soil pH and the available phosphorus content, it reduces the soil acid phosphatase activity. Compared to biochar, the amount of soil moisture content has less effect on the available P in the soil. |
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