基于Meta分析的再生水灌溉对作物产量和氮素利用效率的影响研究  

Effects of reclaimed water irrigation on crop yield and nitrogen use efficiency based on Meta-analysis

作　　者：仇振杰 龚曙晖 罗日晖 QIU Zhenjie;GONG Shuhui;LUO Rihui(School of Civil Engineering,Hunan City University,Yiyang,Hunan 413000,China;Water Resources Bureau of Ziyang,Yiyang,Hunan 413001,China)

机构地区：[1]湖南城市学院土木工程学院,湖南益阳413000 [2]益阳市资阳区水利局,湖南益阳413001

出　　处：《湖南城市学院学报（自然科学版）》2024年第5期51-57,共7页Journal of Hunan City University:Natural Science

基　　金：湖南省自然科学基金项目(2020JJ5022);湖南省教育厅科研项目(22B0781);益阳市社会科学重点课题(2023YS013)。

摘　　要：利用再生水进行农业、园林灌溉是解决水资源短缺的重要举措。定量评价再生水灌溉对作物产量和氮素利用效率(nitrogen use efficiency,NUE)的效应,以及影响机制,可为再生水灌溉应用提供理论依据。本文以清水灌溉为对照,采用Meta-analysis(整合分析)定量研究了不同水质、土壤和管理因素条件下,再生水灌溉对作物产量和氮素利用效率的影响。结果表明:与清水灌溉相比,再生水灌溉显著提高了作物产量16.8%(CI:12.6%~21.1%,P<0.001)和氮素利用效率16.2%(CI:9.5%~23.4%,P<0.001),但其效应高度依赖于水质、土壤和管理因素;在土壤初始含氮量介于200~2000 mg/kg,再生水pH<7,或再生水含氮量<100 mg/L条件下,有利于发挥再生水灌溉增产效应和提高氮素利用效率;采用滴灌系统,施氮肥<1000 kg/ha进行充分灌溉是较为合适的管理策略。The use of reclaimed water(RW)for agriculture and garden irrigation is an important measure to solve the shortage of water resources.Quantitative evaluation of the effects of reclaimed water irrigation on crop yield and nitrogen use efficiency(NUE)and its influencing mechanism can provide a theoretical basis for the application of reclaimed water irrigation.In this paper,the effects of RW irrigation on crop yield and NUE under different water quality,soil and management factorswere quantitatively studied by Meta-analysis with clear water irrigation as control.The results showed that RW irrigation significantly increased crop yield by 16.8%(CI:12.6%to 21.1%,P<0.001)and NUE by 16.2%(CI:9.5%to 23.4%,P<0.001)compared with clean water irrigation,but its effect was highly dependent on water quality,soil and management factors.Under the conditions of initial soil nitrogen content of 200 to 2000 mg/kg,RW pH<7,or a nitrogen content<100 mg/L,it is beneficial to exert the effect of RW irrigation on increasing yield and improving nitrogen use efficiency.It is a more appropriate management strategy to use drip irrigation system and apply nitrogen fertilizer<1000 kg/ha for adequate irrigation.

关 键 词：再生水 作物产量 灌溉 氮素利用效率 META-ANALYSIS 

分 类 号：TV213.9[水利工程—水文学及水资源]