摘要
【目的】施用溶磷菌肥是缓解土壤磷素累积的方式之一,对提高红壤磷素利用率有重要作用。为揭示有机肥与溶磷菌肥施用下土壤磷组分的变化,探究施加溶磷菌肥对土壤肥力的影响,为溶磷菌肥的应用提供科学指导和理论参考。【方法】设置有机肥、溶磷菌肥、溶磷菌+EM混合菌肥、空白对照为试验处理,采用盆栽的方法,每个处理各6盆,于结实期取样测定不同施肥处理下红壤中各形态磷的含量,红壤速效钾、铵态氮、硝态氮的含量,测定高粱生物量、株高等指标。【结果】溶磷菌肥、溶磷+EM菌混合肥、有机肥处理下,中等分解态磷的含量分别为(63.92±4.30)mg/kg、(76.62±4.97)mg/kg和(69.67±2.39)mg/kg,相比空白对照(30.38±1.77)mg/kg,3种施肥处理下中等易分解态磷含量显著提高。溶磷菌肥处理下土壤HCl-P含量为(3.62±0.53)mg/kg,较有机肥处理减少了3.1 mg/kg,说明施溶磷菌肥相比施加有机肥能够减少土壤难溶性磷的累积;溶磷菌肥处理下红壤速效钾含量为(154.90±2.37)mg/kg,相比空白处理增加55.73 mg/kg;溶磷菌肥处理下土壤铵态氮含量为(4.34±0.10)mg/kg,相比空白对照增加1.58 mg/kg,土壤硝态氮为(0.53±0.20)mg/kg,相比空白下降0.99 mg/kg,说明溶磷菌肥能够显著提高土壤速效养分,提高土壤肥力。【结论】红壤施加溶磷菌肥能够显著提高土壤的速效养分,施加溶磷菌肥、溶磷+EM菌混合肥、有机肥均能够显著影响土壤磷素结构,溶磷菌肥、溶磷+EM菌混合肥能够显著减少土壤难溶性磷素的累积,从而显著增加土壤磷素的利用效率,显著增加土壤养分,适合推广以缓解土壤磷沉积问题。
[Objective]AS one of the ways to alleviate the accumulation of phosphorus in soil,the application of phosphate solubilizing plays an important role in improving the phosphorus utilization rate of red soil.Through revealing the changes of soil phosphorus fractions under the addition of organic fertilizer or phosphate solubilizing bio-fertilizer and explore the effects of phosphate solubilizing bio-fertilizer on soil fertility,this study aims to provide scientific guidance and theoretical reference for the application of phosphate solubilizing bio-fertilizer.[Method]This study adopted the method of pot experiment and took organic fertilizer,phosphate solubilizing bio-fertilizer,phosphate solubilizing+effective microorganisms(EM)bacteria mixed fertilizer and a blank contrast group without fertilizer as experimental treatments.Each treatment was conducted on six pots.Samples were collected during maturing stage.The content of all phosphate species,the content of available potassium,ammonium nitrogen,and nitrate nitrogen in red soil,and the sorghum biomass,plant height were determined.[Result]The results showed that the contents of moderately labile P were(63.92±4.30)mg/kg,(76.62±4.97)mg/kg and(69.67±2.39)mg/kg,respectively,under the treatment of phosphate solubilizing bio-fertilizer,phosphate solubilizing+EM bacteria mixed fertilizer and organic fertilizer.The contents of moderately labile P were(30.38±1.77)mg/kg in the blank contrast group.Compared with that of the the blank constrast group,the contents of moderately labile P under the three fertilization treatments were increased significantly.The content of HCl-P in soil treated with phosphate solubilizing bio-fertilizer was(3.62±0.53)mg/kg.The content of HCl-P treated with phosphate solubilizing bio-fertilizer was 3.1 mg/kg lower than that treated with organic fertilizer,indicating that the application of phosphate solubilizing bio-fertilizer reduced the accumulation of insoluble phosphorus in soil compared with organic fertilizer.The content of available potassium in red soil treated with phosphate solubilizing bio-fertilizer was(154.90±2.37)mg/kg,an increase of 55.73 mg/kg compared with that of the blank contrast group.Under the treatment of phosphate solubilizing bio-fertilizer,the content of soil ammonium nitrogen was(4.34±0.10)mg/kg,an increase of 1.58 mg/kg compared with that of the blank contrast group,and the content of soil nitrate nitrogen was(0.53±0.20)mg/kg,a decrease of 0.99 mg/kg compared with that of the blank contrast group.These results suggested that phosphate solubilizing bio-fertilizer could significantly improve soil available nutrients and soil fertility.[Conclusion]The application of phosphate solubilizing bio-fertilizer in red soil can significantly improve the soil available nutrients.The application of phosphate solubilizing bio-fertilizer,phosphate solubilizing+EM bacteria mixed fertilizer and organic fertilizer can significantly affect the soil phosphorus structure.Phosphate solubilizing bio-fertilizer and phosphate solubilizing+EM bacteria mixed fertilizer can significantly reduce the accumulation of soil insoluble phosphorus,increase the utilization efficiency of soil phosphorus as well as increase soil nutrients,thus they should be promoted toalleviate the problem of soil phosphorus deposition.
作者
郑淇元
谢意太
卞海洋
文洁
刘耀辉
吴若鸿
修玉冰
朱裕煌
盛可银
兰子钧
张文元
ZHENG Qiyuan;XIE Yitai;BIAN Haiyang;WEN Jie;LIU Yaohui;WU Ruohong;XIU Yubing;ZHU Yuhuang;SHENG Keyin;LAN Zijun;ZHANG Wenyuan(Jiangxi Key Laboratory of Silviculture,College of Forestry,Jiangxi Agricultural University,Nanchang,330045,China;Xiyao Forest Farm of Guixi City,Guixi,Jiangxi 335415,China;Forestry Development Center of Liuan,Anhui 237010,China)
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2022年第1期233-244,共12页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家自然科学基金项目(31560204)。
关键词
磷组分
有效养分
溶磷菌肥
有机肥
soil phosphorus fractions
available nutrients
phosphate-solubilizing bacteria
organic fertilizer
作者简介
郑淇元,orcid.org/0000-0001-5610-2207,zqy1182372132@outlook.com;通信作者:张文元,副教授,博士,主要从事土壤养分循环及微生物生态研究,orcid.org/0000-0001-9514-4813,zhangwenyuan@jxau.edu.com。
