南疆盐渍化棉田硫酸铵替代尿素配合外源碳添加及磷肥前移技术对棉花产量的影响OA

In order to verify the effects of substituting urea with ammonium sulfate for rhizosphere acidi-fication combined with exogenous carbon addition and advanced phosphorus fertilizer application on yield and income in salinized cotton fields in southern Xinjiang,field experiments were conducted in Awati Coun-ty and Xinhe County of the Aksu region from 2024 to 2025.In the Awati test site,the control fertilization amount was urea 675 kg/hm2,monoammonium phosphate 550 kg/hm2 and the treatment fertilization a-mount was urea 506 kg/hm2,ammonium sulfate 370 kg/hm2,monoammonium phosphate 550 kg/hm2,or-ganic water-soluble fertilizer 45 kg/hm2.In Xinhe test site,the control fertilization amount was urea 600 kg/hm2,monoammonium phosphate 225 kg/hm2,and the treatment fertilization amount was urea 360 kg/hm2,ammonium sulfate 570 kg/hm2,monoammonium phosphate 195kg/hm2,organic water-solu-ble fertilizer 45kg/hm2.The biomass,yield,yield components,partial factor productivity of nitrogen and phosphorus fertilizer and economic benefits of the control group and the experimental group were deter-mined.The results showed that compared with the control group,there was no significant change in the lint yield of the treatment group in 2024 and 2025(P>0.05).Compared with the control group,there was no significant difference in the aboveground biomass of single plant in Xinhe and Awati test sites in 2024 and Awati test site in 2025(P>0.05).In 2025,the aboveground biomass per plant of the treatment group in Xinhe experimental site increased by 25.0%.Compared with the control group,there was no significant change in the partial factor productivity of nitrogen fertilizer in the treatment group at Xinhe experimental site in 2024,Xinhe and Awati experimental sites in 2025(P>0.05).In 2024,the partial factor productivi-ty of nitrogen fertilizer in the treatment group of Awati test site was significantly increased by 19.1%(P<0.05).Compared with the control group,there was no significant difference in the partial productivity of phosphate fertilizer in the treatment group of Xinhe experimental site in 2024 and Awati experimental site in 2025(P>0.05).In 2024,the partial factor productivity of phosphate fertilizer in the treatment group of Awati test site was significantly increased by 19.1%compared with the control group(P<0.05).In 2025,the partial factor productivity of phosphate fertilizer in the treatment group of Xinhe test site was significantly increased by 23.7%compared with the control group(P<0.05).In summary,based on am-monium sulfate instead of urea acidification rhizosphere,exogenous carbon addition and phosphorus fertiliz-er forward technology can improve cotton biomass,increase nitrogen and phosphorus fertilizer partial pro-ductivity,cotton field yield,and economic benefits have no significant change.