摘要
为探究改性稻壳炭、改性沸石对红壤磷素有效性的影响,以稻壳炭(R)、HCl改性稻壳炭(HR)、沸石(Z)、铵化沸石(NZ)、低温活化沸石(RZ)和铵化低温活化沸石(NRZ)为试验材料,以1%、3%、5%和8%的剂量添加到混合肥料中并与供试红壤充分混合,经过7、14、28和56 d的室内培养后测定土壤有效磷含量,并通过土壤盆栽试验研究添加5%改性稻壳炭、改性沸石对玉米磷肥利用率的影响。研究结果表明,在土壤培养的第7、14和28 d,沸石、稻壳炭改性方式和添加量对土壤有效磷含量影响显著(P<0.01),且其交互作用对土壤有效磷含量影响显著(P<0.01),添加量是影响土壤有效磷含量有关参数的主要决定因子。在不同稻壳炭、沸石改性方式和添加剂量处理下,土壤有效磷含量增加,磷肥固定率降低。沸石经铵化和低温活化处理后,吸附能力和吸附容量增加,提高了土壤中磷素有效性。稻壳炭经HCl氧化改性处理后,对土壤中磷素的吸附能力增强,降低了土壤对磷的固定作用。混合肥料中添加5%改性稻壳炭、改性沸石后,玉米磷素利用率比对照提高了34.45%~45.53%,但各添加材料处理间差异不显著。
This project was carried out in an effort to investigate how modified rice husk charcoal and modified zeolite affect the phosphorus efficiency using rice husk charcoal(R),hydrochloric acid modified rice husk charcoal(HR),zeolite(Z),ammonium chloride modified zeolite(NZ),roasted zeolite(RZ)and ammonium chloride modified roasted zeolite(NRZ)applied as carriers of phosphorus to mixed fertilizer.The amounts of modified rice husk charcoal and modified zeolite added to mixed fertilizer for each treatment were 1%,3%,5% and 8% respectively.Then we mixed the fertilizer with red earth,analyzed the available phosphorus content after 7,14,28 days and 56 days of incubation,respectively. Meanwhile,the effect of modified rice husk charcoal and modified zeolite on the utilization ratio of phosphate in maize studied by pot experiments.The results showed that the modified manners and additions of rice husk charcoal and zeolite had significant effects on soil available phosphorus content after 7,14 days and 28 days of incubation.Additionally,the interaction between modified manners and additions displayed significant effect on the available phosphorus content.The additions of rice husk charcoal and zeolite was the dominant factor affecting the soil available phosphorus content.Adding modified rice husk charcoal and modified zeolite to mixed fertilizer increased the available phosphorus content of soil and reduced the soil phosphate fixation rate.The adsorption capacity of zeolite was increased after ammonium chloride modified and roasted treatment,which improved the availability of phosphorus in soil.The adsorption capacity of rice husk charcoal to phosphorus in soil was increased after modified by HCl,and the fixation rate of phosphorus in soil was reduced.Compared with CK,the utilization ratio of phosphate in maize increased by 34.45% ~ 45.53% with the mixed fertilizer added modified rice husk charcoal and modified zeolite,but the differences between each modified material were not significant.
作者
白玉超
邓宝元
史海莉
王宗抗
黄培钊
王德汉
段继贤
BAI Yu-chao;DENG Bao-yuan;SHI Hai-li;WANG Zong-kang;HUANG Pei-zhao;WANG De-han;DUAN Jixian(College of Nature Resources and Environment,South China Agricultural University,Guangzhou Guangdong 510642;Shenzhen Batian Ecotypic Engineering Co.Ltd.Postdoctoral Workstation,Shenzhen Guangdong 518105)
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2020年第2期31-39,共9页
Soil and Fertilizer Sciences in China
基金
“十三五”国家重点研发计划课题(2016YFD0200402)
深圳市芭田生态工程股份有限公司博士后工作站项目。
关键词
改性稻壳炭
改性沸石
有效磷
磷肥利用率
modified rice husk charcoal
modified zeolite
Olsen-P
efficiency of phosphorous fertilizer
