ACTA AGRICULTURAE BOREALI-SINICA ›› 2019, Vol. 34 ›› Issue (6): 170-176. doi: 10.7668/hbnxb.20190240

Special Issue: Soil fertilizer

• Resource and Environment·Plant Protection • Previous Articles     Next Articles

Effect of Inorganic Organic Fertilizer Combined with Biochar on Enzyme Activity and Phosphorus Forms in Reclaimed Soil

WEI Junjie, HONG Jianping   

  1. College of Resources and Environment, Shanxi Agricultural University, Taigu 030801, China
  • Received:2019-04-09 Published:2019-12-28

Abstract: To explore the fertilization measures for the poor soil in the coal mining subsidence reclamation area, this paper used the calcareous soil in the coal mining subsidence area of Xiangyuan County, Changzhi City for five years to test the soil enzyme activity and phosphorus form and the variation law was investigated. The results showed that biochar promoted the activity of urease, alkaline phosphatase, invertase, catalase and dehydrogenase in soil during the test period.The highest increase was 647.0%, 223.0%, 68.6%, 93.7%, and 331.0%.Different fertilization treatments, the mixed application of organic fertilizer and chemical fertilizer to promote urease activity in soil is stronger than single application of organic fertilizer or chemical fertilizer, but single application of organic fertilizer has effects on alkaline phosphatase, invertase, catalase and dehydrogenase. The promotion effect is stronger than the single application of chemical fertilizer and the mixed application of organic fertilizer and chemical fertilizer. With the addition of biochar, the content of various phosphorus forms varied significantly among different fertilization treatments. Among them, Ca2-P and Ca10-P were relatively abundant, which increased by 17.09% and 4.58% respectively; Ca8-P, Al-P, the content of Fe-P and O-P was gradually depleted, with a maximum reduction of 3.39%, 5.40%, 7.20%, and 3.96%, respectively. The maximum increments of available phosphorus and total phosphorus were 11.0% and 4.34% respectively. The content of inorganic phosphorus was increased to be 53.5%-63.3% higher than CK. The correlation results, the available phosphorus in the reclaimed soil was closely related to the contents of Ca2-P, Ca8-P and O-P. In addition, it could be seen that in the reclaimed soil, Ca-P, iron-aluminum bound phosphorus and closed-state phosphorus maintain a certain ratio, and under certain conditions, they could be transformed by Ca8-P and O-P.

Key words: Reclaimed soil, Biochar, Enzyme activity, Inorganic phosphorus, Available phosphoru

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Cite this article

WEI Junjie, HONG Jianping. Effect of Inorganic Organic Fertilizer Combined with Biochar on Enzyme Activity and Phosphorus Forms in Reclaimed Soil[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(6): 170-176. doi: 10.7668/hbnxb.20190240.

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