摘要
针对设施土壤中长期大量施用有机肥可能造成的土壤磷素过度积累及易流失等问题,本研究拟通过施用生物炭增加土壤中磷的吸附,从而减少磷流失。此外,目前关于在设施土壤中连续施用生物炭对土壤磷素形态和有效性的影响作用尚不清楚。为此,在辣椒大棚中通过长期定位试验,研究连续4茬施用生物炭对土壤有效磷、不同形态磷、磷吸附及释放的影响。结果表明:在每公顷施用15 t猪粪稻草有机肥基础上施用生物炭可显著增加土壤有机碳含量和土壤pH,并显著改变了土壤磷各组分含量,显著增加了NaHCO_(3)P_(i)、NaHCO_(3)P_(o)、Fe/Al-P_(i)和Ca-P_(i)含量,且显著降低了Ca-P_(o)含量。此外,连续4茬施用生物炭还增加了土壤对磷的吸附,从而降低土壤磷的释放。本研究结果说明,在设施土壤中长期大量施用有机肥下结合施用生物炭在保持土壤有效磷供应下可提高土壤磷的吸附,从而降低土壤磷素的流失风险。
In view of the problems of excessive accumulation and easy loss of soil phosphorus caused by longterm application of large amounts of organic fertilizer in greenhouse,this study intends to increase phosphorus adsorption in soil and reduce phosphorus loss by applying biochar.In addition,the effect of continuous application of biochar on the form and effectiveness of soil phosphorus in greenhouse was unclear,a long-term positioning experiment in pepper greenhouses was conducted to study the effects of continuous application of biochar on soil available phosphorus content,different forms of phosphorus,phosphorus adsorption and release.The results show that the application of biochar with pig manure straw organic fertilizer(15 t/hm^(2))could significantly increase the soil organic carbon content and soil pH,and significantly change the content of soil phosphorus components,significantly increase NaHCO3 Pi,NaHCO3 P_(o),Fe/Al-Pi_(i)and Ca-Picontent,and significantly reduce Ca-P_(o)content.In addition,the continuous application of biochar in four seasons could also increase the adsorption of soil phosphorus,thereby reducing the release of soil phosphorus.The results of this study indicates that long-term application of large amounts of organic fertilizer in the facility soil combined with biochar could increase the adsorption of soil phosphorus while maintaining the effective supply of soil phosphorus,thereby reducing the risk of soil phosphorus loss.
作者
王秋君
徐丽萍
郭德杰
王光飞
梁永红
马艳
Wang Qiujun;Xu Liping;Guo Dejie;Wang Guangfei;Liang Yonghong;Ma Yan(Institute of Agricultural Resource and Environment,Jiangsu Academy of Agricultural Sciences,Nanjing 210014;Cultivated Land Quality Protection Station,Liuhe Agricultural Technology Extension Center,Nanjing 211500;Jiangsu Station for Protection of Arable Land Quality and Agricultural Environment,Nanjing 210036;School of the Environment and Safety Engineering,Jiangsu University,Zhenjiang Jiangsu 212013)
出处
《中国农学通报》
2021年第11期114-121,共8页
Chinese Agricultural Science Bulletin
基金
国家重点研发计划“黄淮暖温带区设施蔬菜化肥农药减施技术模式建立与示范”(2016YFD0201007)
江苏省第五期“333工程”科研项目资助计划“有机肥碳组分耦合设施蔬菜土壤氮素转化的微生物学机制研究”(BRA2019313)
江苏现代农业产业技术体系“江苏现代农业(蔬菜)产业技术体系废弃资源利用创新团队”(JATS[2019]333)。
关键词
设施土壤
有机肥
生物炭
土壤磷分级
磷吸附
磷释放
greenhouse soil
organic fertilizer
biochar
soil phosphorus classification
phosphorus adsorption
phosphorus release
