植物营养与肥料学报Issue(3)：642-650,9.DOI:10.11674/zwyf.2014.0316
生物碳对土壤磷素和棉花养分吸收的影响
Effects of biochar on soil phosphorus content and cotton nutrient uptake
摘要
Abstract
Influence of biochar on soil phosphorus ( P ) , cotton growth and nutrient uptake under different phosphorus fertilizer application rates was evaluated with a pot experiment in years of 2011 and 2012.Biochar was produced from dried cotton stalks via pyrolysis in oxygen-limited conditions .Three types of biochar produced at 450℃, 600℃ and 750℃ ( BC450 , BC600 and BC750 ) were used as the soil organic amendment , and an untreated soil was set as control (CK) in this study.Each soil treatment was applied with three levels of P fertilizer (P2O5) as 0, 0.25 and 0.5 g/kg of soil weight (P0, P1 and P2).The experiment was that of 4 ×3 factorial design with four biochar treatments (BC450, BC600, BC750 and CK) and three P application rates (P0, P1 and P2).Cotton was planted for two consecutive growth seasons in 2011 and 2012.The results show that the soil P content and availability are significantly improved with biochar added .With the increase of pyrolysis temperature of biochar, the contents of water-soluble P, available P and total P in soil are increased significantly , and the order of influence of biochar on soil P content is water-soluble P>total P>available P.The dry matter amounts of cotton are significantly higher under the biochar treatments than those under the control ( CK) in both 2011 and 2012, but there are differences among three biochar treatments between 2011 and 2012.The P uptake of cotton is also promoted with biochar added .The order of cotton nutrients uptake under three biochar treatments is BC 750 >BC600 >BC450.These results suggest that biochar can increase soil P content , and enhance cotton growth and nutrients uptake .Thus, pyrolysis temperature is a vital factor for biochar , and the high temperature ( 750℃) biochar treatment demonstrates higher soil P , cotton dry matter weight and P uptake compared to the low temperature (450℃) biochar.关键词
生物碳/水溶性磷/速效磷/全磷/棉花/磷素吸收Key words
biochar/water-soluble P/available P/total P/cotton/P uptake分类
农业科技引用本文复制引用
苏倩,侯振安,赵靓,茹思博,翟勇,董天宇..生物碳对土壤磷素和棉花养分吸收的影响[J].植物营养与肥料学报,2014,(3):642-650,9.基金项目
国家自然科学基金项目（31160415）资助。 （）
