摘要
为探明控制排水对油菜/黄豆农田土壤肥力及减排的影响,于2018-2020年在湖北省漳河灌区开展3种不同控制排水处理的油菜/黄豆小区种植试验,采集各处理0~20 cm、20~40 cm及40~60 cm深度土样进行氮磷分析,监测典型时段排水水量及水质并计算氮磷排放负荷。结果表明,相较传统的自由排水FD处理,控制排水FL、CL均会造成0~20 cm土壤全氮流失,促使全氮向深层土壤迁移;控制排水FL、CL处理对20~60 cm土壤的保磷能力优于自由排水FD,土壤全磷向深层土壤迁移不明显;定出口高程FL处理削减氮磷浓度及排放负荷效果要显著优于变出口高程CL,相较自由排水FD,总氮、硝态氮、总磷浓度降低29.39%、15.99%、12.07%,负荷减排达73.93%、68.98%、67.54%。暗管出口控制深度0.6 m的控制排水处理(FL)是漳河灌区油菜/黄豆种植更优的排水模式。
In order to study the effect of controlled drainage on soil fertility and emission loads reduction of rape/soybean field,plots planting experiments of three rapeseed/soybean with different controlled drainage treatments were carried out in Zhanghe Irrigation District of Hubei Province from 2018 to 2020.Soil samples at depth of 0~20 cm,20~40 cm and 40~60 cm were collected for nitrogen and phosphorus analysis,drainage water quantity and quality were monitored and nitrogen and phosphorus emission loads were calculated.The results showed that compared with traditional FD treatment,controlled drainage FL and CL could cause total nitrogen losses at 0~20 cm soil and promote total nitrogen transfer to deep soil profile.The phosphorus retention capacity of controlled drainage FL and CL were better than that of FD,and the migration of total phosphorus to deep soil was not obvious.The effects of reducing nitrogen and phosphorus concentration and emission loads of FL treatment were significantly better than those of CL.Compared with FD,the concentrations of total nitrogen,nitrate nitrogen and total phosphorus of FL treatment had been decreased by 29.39%,15.99%and 12.07%,and emission loads reduction reached to 73.93%,68.98%and 67.54%,respectively.Controlled drainage treatment(FL)with a depth of 0.6 m at the outlet of underground pipe was a better drainage model for rape/soybean planting in Zhanghe Irrigation District.
作者
何军
张艺
杜发兴
赵树君
李赵琴
甘学华
HE Jun;ZHANG Yi;DU Fa-xing;ZHAO Shu-jun;LI Zhao-qin;GAN Xue-hua(College of Hydraulic&Environmental Engineering,China Three Gorges University,Yichang 443002,Hubei Province,China;Engineering Research Center of Eco-environment in Three Gorges Reservoir Region,Ministry of Education,Three Gorges University,Yichang 443002,Hubei Province,China;Hubei Zhanghe Hydraulic Project Administration Bureau,Jingmen 448200,Hubei Province,China)
出处
《节水灌溉》
北大核心
2023年第4期67-72,81,共7页
Water Saving Irrigation
基金
国家重点研发计划项目(2018YFC1508302)
湖北省水利重点科研项目(HBSLKY201801,HBSLKY202207)。
关键词
控制排水
土壤氮磷
氮磷浓度
排放负荷
削减
controlled drainage
soil nitrogen and phosphorus
nitrogen and phosphorus concentration
emission loads
reduction
