Effects of Biochar on Inorganic Phosphorus Forms in Grey Desert Soil
[ Objective] The influence of biochar application on soil inorganic P forms in grey desert soil of Xinjiang was evaluated with a pot experiment. [Method]In this study, three soil treatments were set as blank soil ( CK), application of the equal amounts of carbon as cotton straw and biochar to the blank soil, respectively. Each soil treatment was applied at three levels of phosphate fertilizer ( P2O5 ) as 0, 0.25 and 0. 5 g/kg. [Result]The result showed that Ca10 -P was in a dominant position in soil inorganic P, accounting for more than 60% of the total inorganic P; followed by Ca8 - P, accounting for more than 20% of the total inorganic P. The content of inorganic P, Ca2 - P, Ca8 - P, Al - P and Fe - P in soil was significantly increased by phosphate fertilizer application, but the content of 0 - P and Ca10 - P was not affected. Ca2 - P in soil was improved by application of cotton straw and biochar. The content of Ca2 - P and Al - P in soil under biochar treatments was significantly higher than those under cotton straw and CK treatments, but the content of Ca8 - P and Fe - P in biochar treatments was decreased. [ Conclusion ] Those results suggest that application of biochar can improve the inorganic P availability in grey desert soil.
国家科技期刊平台
NSTL
万方数据
维普
