古龙酸母液和菌渣对半干旱区土壤氮素的影响

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关键词古龙酸母液;土壤氮素组分;微生物生物量碳;微生物生物量氮;半干旱地区

中图分类号S154.1文献标识码A

文章编号 0517-6611（2025）21-0160-07

doi：10.3969/j.issn.0517-6611.2025.21.031

AbstractObetie]UsingGulonicAcidMotherLiquor（GAML）andfungalresidues，thefectsofdifrentfertlationtreamentssoil nitrogenomponentsandmicrobialbiomasscarbonnditrogendynamicsinaizefeldsinasemi-aridregionweivestigated.MethodA field experiment was conducted with five fertilization treatments：（A） low-dose GAML + urea，（B）high-dose GAML + urea，（C）urea alone，（D） high-dose GAML + protein residue，and （E） high-dose GAML + protein residue.Fertilizers were applied in three stages，and soil samples were collected at -25 ，0，5，14，and 28 days （DO，D1，D2，D3，D4） afterthe final fertilization. The concentrations of ammonium nitrogen （ NH4+ -N），nitrate nitrogen（ NO3- -N），total nitrogen（TN），microbial biomass carbon（MBC），and microbial biomass nitrogen （MBN）wereasuedesultntfertlatiotreantssigfantlyedilronfosdobalctiityoets of ammonium nitrogen （ NH4+ -N）and totalnitrogen（TN）in both rot soiland rhizosphere soil showeda trendoffirst increasing and then decreasing over time，while nitrate nitrogen（ NO3- -N）continuously increased.Nitrogen contents，MBC，and MBN were higher in the rhizospheresoilhanitotsoildicatigtattesphecoenvioetwasoefvorableforenauulatiodbal growth.Compared with urea alone，the combined application of GAMLand protein residue significantly increased soil NO3- -N，MBC，and MBN contents，with the high-dose gulonic acid + protein residue treatment （E） showing the best performance and the highest comprehensive index（O.85）.Conclusion]Thehig-dosecombinedaplicationofGAMLandproteinresidue（treatmentE）showedthe mostpronounced efects inpromotinggencuulatioacgcobialctivityndiprovingslrogclineobdusefd proteiesidueiantlproerogompositodobaltiityfeosresiloterog tionandcycig，dprovidentfcsisftsoueutliatiooflturalyprductsandrognmaageetiels of semi-arid regions.

KeywordsGulonicacidmotherlquor;Soilnrgencomponnts;Microbialbomasscarbon;Micobialbiomassnitroge;em-aridregion

半干旱地区广泛分布于全球多个区域，包括中国北方、中亚部分地区和北美的干旱地带。（剩余12666字）