摘要
提高农田生态系统养分利用效率、降低土壤N_(2)O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、N_(2)O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N_(2)O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NO_(2)-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N_(2)O排放量,其中原花青素处理N_(2)O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N_(2)O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N_(2)O减排相结合提供了新思路和新途径。
It is important for the green and sustainable development of agriculture to improve the nutrient use efficiency of farmland ecosystem and reduce soil N_(2)O emission.In this study,the effects of plant extracts such as procyanidins and tannic acid were investigated on plant biomass,N_(2)O 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 NO_(2)-and NO3-in the soil.Procyanidins and tannic acid treatments significantly reduced N_(2)O emission during the growth period of rape.The reduction of N_(2)O 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 N_(2)O 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 N_(2)O emission reduction in calcareous farmland soil in northern China.
作者
景悦杨
王珊珊
张新星
吴迪
高志岭
JING Yueyang;WANG Shanshan;ZHANG Xinxing;WU Di;GAO Zhiling(College of Resource and Environmental Sciences,Hebei Agricultural University/Key Laboratory for Farmland Eco Environment of Hebei Province,Baoding 071000,China)
出处
《河北农业大学学报》
CAS
CSCD
北大核心
2024年第1期49-57,共9页
Journal of Hebei Agricultural University
基金
河北省重点研发项目(21327303D和20327306D)
国家自然基金面上项目(42375170)。
关键词
原花青素
单宁酸
氧化亚氮
无机肥
氮素利用率
procyanidins
tannic acid
nitrous oxide
inorganic fertilizer
nitrogen use efficiency
