首页|添加单宁酸和原花青素对油菜氮素利用率和氧化亚氮排放的影响

添加单宁酸和原花青素对油菜氮素利用率和氧化亚氮排放的影响

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提高农田生态系统养分利用效率、降低土壤N2O排放是农业绿色可持续发展的重要任务.本研究利用盆栽试验探讨了原花青素、单宁酸等植物提取物对北方石灰性土壤油菜(Brassica chinensis L.)生物量、N2O排放以及氮素利用率的影响.试验设计了单施尿素(UR)、尿素+低量原花青素(PC1)、尿素+高量原花青素(PC2)、尿素+低量单宁酸(TA1)和尿素+高量单宁酸(TA2)5 个处理,采用静态箱技术测定了各处理N2O排放.结果表明:与UR处理相比,(1)PC1、PC2、TA1 和TA2 处理提高了油菜的产量(增幅为 7.9%~17.9%)及含氮量(增幅为 10.3%~23.2%);(2)显著降低了土壤NO2-和NO3-等无机氮含量;(3)PC1、PC2、TA1 和TA2 等处理均显著降低了油菜生育期N2O排放量,其中原花青素处理N2O减排率为 28.1%~33%,单宁酸处理的减排率为 32.9%~41.5%;(4)油菜的氮素利用率提高了 5.0%~9.7%.综上所述,在北方石灰性土壤施用原花青素、单宁酸不仅显著降低了N2O排放,还有助于提高油菜的产量和氮素利用率,这为富含原花青素、单宁酸等植物提取物的绿色循环利用与北方石灰性农田土壤N2O减排相结合提供了新思路和新途径.
Impact of the application of tannic acid and procyanidins on the nitrogen use efficiency and N2O emissions during rape growth period
It is important for the green and sustainable development of agriculture to improve the nutrient use efficiency of farmland ecosystem and reduce soil N2O emission.In this study,the effects of plant extracts such as procyanidins and tannic acid were investigated on plant biomass,N2O emission and nitrogen use efficiency in pot experiments of rape grown in northern China calcareous soil.A total of five treatments were designed including UR(UR),UR+low procyanidins(PC1),UR+high procyanidins(PC2),UR+low tannic acid(TA1)and UR+high tannic acid(TA2).The results showed that procyanidins and tannic acid treatments increased the rape yield by 7.9%-17.9%and nitrogen content by 10.3%-23.2%compared to the UR.Procyanidins and tannic acid treatments significantly inhibited the content of inorganic nitrogen such as NO2- and NO3- in the soil.Procyanidins and tannic acid treatments significantly reduced N2O emission during the growth period of rape.The reduction of N2O affected by the procyanidins was 28.1%-33%,and was 32.9%-41.5%by the tannic acid treatments.The nitrogen use efficiency of rape was increased by 5.0%-9.7%.In summary,the application of procyanidins and tannic acid in calcareous soil not only significantly reduced N2O emissions,but also helped to improve the yield and nitrogen use efficiency of rape.This study provided a novel idea for the simultaneously realization of the green recycling of plant extracts such as procyanidins and tannic acid together with the N2O emission reduction in calcareous farmland soil in northern China.

procyanidinstannic acidnitrous oxideinorganic fertilizernitrogen use efficiency

景悦杨、王珊珊、张新星、吴迪、高志岭

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河北农业大学 资源与环境科学学院 / 河北省农田生态环境重点实验室,河北 保定 071000

原花青素 单宁酸 氧化亚氮 无机肥 氮素利用率

河北省重点研发项目河北省重点研发项目国家自然基金面上项目

21327303D20327306D42375170

2024

河北农业大学学报
河北农业大学

河北农业大学学报

CSTPCD北大核心
影响因子:0.475
ISSN:1000-1573
年,卷(期):2024.47(1)
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