Study on the Effect of Different Modified Zeolite to Phosphorus Activation in Red Soil
- 1 College of Resource and Environment, Yunnan Agricultural University, Kunming, China
- 2 College of Resource and Environment, Yunnan Agricultural University, Kunming, China
- 3 College of Resource and Environment, Yunnan Agricultural University, Kunming, China
- 4 College of Resource and Environment, Yunnan Agricultural University, Kunming, China
- 5 Soil Fertilization and Pollution Remediation Engineering Laboratory of Yunnan Province, Kunming, China
- 6 Soil Fertilization and Pollution Remediation Engineering Laboratory of Yunnan Province, Kunming, China
- 7 Soil Fertilization and Pollution Remediation Engineering Laboratory of Yunnan Province, Kunming, China
- 8 Soil Fertilization and Pollution Remediation Engineering Laboratory of Yunnan Province, Kunming, China
Abstract
The a ctivation of soil-fixed phosphorus is a long - term concern in soil science. In order to enhance the activation effect to soil-fixed phosphorus in red soil, different modified zeolite, th r ough physical, chemical method and the associated both physics and chemistry , was used in this paper. The results showed as following: 1) the activated ability to soil-fixed phosphorus in red soil for modified zeolite was higher than the common one signally. Order of the ab i lity for all kinds of modification zeolite in absolute activation amount and activation rate was : Modified in high temperature ammonium saturated zeolite > Ammonium saturated zeolite > Modified in high temperature zeolite > Common zeolite. 2) The increasing rate of m odified phosphorus in high temperature ammonium saturated zeolite and a mmonium saturated zeolite had a decline trend with time postponed while that for m odified phosphorus in high temperature zeolite and routine zeolite w as rising gradually with time postponed. For a mmonium saturated zeolite, the increasing rate of phosphorus in low available phosphorus content red soil was significantly faster than that in red soil with the higher content of available phosphorus. 3) The activation rate for the same modified zeolite showed difference in different phosphorus level soil. The order is: SP high > SP medium > SP low .
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