甘蔗糖业2025，Vol.54Issue(6)：26-35,10.DOI:10.3969/j.issn.1005-9695.2025.06.004
减量施氮对甘蔗产量、氮肥利用率及土壤呼吸的影响
Effects of Nitrogen Fertilizer Reduction on Sugarcane Yield,Nitrogen Use Efficiency,and Soil Respiration
摘要
Abstract
Elucidating the effects of nitrogen(N)fertilizer reduction on sugarcane yield,nitrogen use efficiency,nitrogen,phosphorus(P),and potassium(K)content,sugar content,and soil respiration could provide a theoretical basis for optimizing nitrogen fertilizer management in sugarcane fields in Guangxi.A field experiment was conducted in a typical sugarcane-growing region of Guangxi to evaluate four N application rates:a conventional rate of 500 kg/hm2(N500),and reduced rate of 20%(N400),40%(N300),and a zero-N control(N0).Over three consecutive growing seasons(2019～2021),the observation results showed that N reduction up to 40%did not significantly affect sugarcane yield,stalk N,P,K content,sugar content,or soil respiration rate.However,it significantly increased the partial factor productivity of applied N(PFPN).Compared with conventional N application rate(500 kg/hm2),the PFPN increased by 105.40 kg/kg under N300.These findings demonstrate that optimizing N application rate can significantly enhance nitrogen use efficiency without compromising sugarcane yield,offering a strategy for sustainable sugarcane production with lower environmental risks.关键词
甘蔗/氮肥/产量/肥料利用率/养分吸收量/土壤呼吸Key words
Sugarcane/Nitrogen fertilizer/Yield/Fertilizer utilization rate efficiency/Nutrient uptake/Soil respiration分类
农业科技引用本文复制引用
陆艳妮,李卓亭,徐强胜,宁文婷,詹双庆,苏宏新,胡宝清..减量施氮对甘蔗产量、氮肥利用率及土壤呼吸的影响[J].甘蔗糖业,2025,54(6):26-35,10.基金项目
广西自然科学基金项目(2025GXNSFAA069581、2018GXNSFBA281177) （2025GXNSFAA069581、2018GXNSFBA281177）
广西高校引进海外高层次人才"百人计划"(6020303891350) （6020303891350）
