土壤2023，Vol.60Issue(5)：1001-1007,7.DOI:10.13758/j.cnki.tr.2023.05.009
不同分子量碳源对砂姜黑土磷素有效性和玉米磷吸收的影响
Effects of Carbon Sources with Different Molecular Weights on Phosphorus Availability and Phosphorus Uptake in Maize
摘要
Abstract
A pot experiment was conducted to understand the effects of different carbon sources(fructose(GT),sucrose(ZT)and cellulose(XWS))on the transformation of phosphorus(P)form in soil and P uptake by maize with the lime concretion(Shajiang)black soils of Anhui Province.The results showed as follows:1)Soil Olsen-P content firstly increased and then decreased with time,after thinning for 7 days the content of Olsen-P under GT treatment reached the maximum,and after 15 days the content of Olsen-P under XWS treatment reached the maximum.After 90 days,compared with CK,GT and ZT,the content of Olsen-P under XWS treatment was significantly increased by 79.74%,54.03%and 30.03%(P<0.05),respectively.2)After 90 days,compared to CK,XWS treatments significantly reduced the contents of Fe-P and Ca10-P,and increased the contents of Ca8-P,while no significant difference was found in the contents of Ca2-P among CK,GT and ZT treatments.Compared with CK,XWS treatment significantly increased the contents of active organophosphorus(LOP)and moderately active organophosphorus(MLOP),and decreased the content of moderately stable organophosphorus(MROP).3)Under XWS treatment,soil DOC content and phosphatase activity were increased,but soil pH and exchangeable calcium content were decreased,which were important factors influencing the increase of soil P availability.4)Compared with CK,GT and ZT treatments,P uptake of maize under XWS treatment was significantly increased by 46.20%,19.05%and 19.28%.The results show that compared with low molecular weight carbon sources(fructose and sucrose),high molecular weight carbon sources(cellulose)have better long-term effectiveness in improving soil P availability and P absorption in maize,which provide important information for the regulation and effectiveness of soil P conversion by using carbon sources in farmland ecosystems.关键词
碳源/分子量/磷有效性/磷形态/砂姜黑土/玉米/磷吸收量Key words
Carbon source/Molecular weight/Phosphorus availability/Phosphorus form/Sand ginger black soil/Maize/Phosphorus uptake分类
农业科技引用本文复制引用
阳琴,叶新新,徐博,占丰瑞,赵华,李虹颖,熊启中,孙瑞波,李硕,张朝春..不同分子量碳源对砂姜黑土磷素有效性和玉米磷吸收的影响[J].土壤,2023,60(5):1001-1007,7.基金项目
国家重点研发计划项目(2021YFD1901200)和国家自然科学基金项目(41977023,32061123007)资助Supported by the National Key R&D Program of China(No.2021YFD1901200)and the National Natural Science Foundation of China(Nos.41977023,32061123007) （2021YFD1901200）
