不同水肥管理模式对太湖地区稻田土壤氮素渗漏淋溶的影
响
尹海峰;焦加国;孙震;刘满强;李辉信;胡锋
【期刊名称】《土壤》 【年(卷),期】2013(045)002
【摘要】针对当前我国水稻生产中日益严重的水资源短缺及稻田土壤氮素渗漏淋溶引发的面源污染问题,本研究通过设置2种灌溉方式及4个施氮水平的双因子交互试验,探讨了不同水肥处理对稻田土壤氮素渗漏淋溶的影响.结果表明,稻田20 cm处渗漏水中NH+4-N浓度与施氮量呈正相关关系,减少氮肥施用量,可降低2％～35％的NH+4-N浓度,而80 cm处NH+4-N浓度与施氮量无相关关系；稻田20 cm、80 cm处渗漏水中NO3-N浓度均与施氮量呈正相关关系；控制灌溉显著提高了稻田80 cm处渗漏水中NO-3-N浓度,增幅达31％,但由于其水分渗漏量少,NO3-N淋溶量较常规灌溉仍降低16％～ 49％; NO3-N是稻田中氮素渗漏淋溶的主要形式,占氮素渗漏淋溶总量的77％～92％；减氮施肥条件下,NO3-N渗漏淋溶量降低14％～56％.控灌减氮措施可很好地协调产量效益与水体环境效益,是适宜太湖地区的环境友好型水肥管理模式.%Due to the growing deficiency of water resources and non-point pollution caused by nitrogen leaching losses from paddy fields in China,a field case study was conducted to investigate the dynamic characteristics and the load of nitrogen leaching losses under different water and fertilizer managements by setting two kinds of irrigations and four kinds of nitrogen levels.Results showed that NH~-N concentration in the
leachate was positively correlated to N application rate at 20 cm soil depth,NH+4-N concentration reduced by 2％-35％ when N input reduced,NH~-N concentration did not correlated with N application rate at 80 cm soil depth.NO-3-N concentration were both positively related to N application rate at the above two depths.Control irrigation increased NO-3-N concentration significantly by 31％,and water leakage was less than traditional irrigation; however NO-3-N leachate was 16％-49％ lower.Nitrogen was leached away mainly in the form of NO-3-N,and it was 77％-92％ of total nitrogen leaching flux.Reducing nitrogen application rate decreased NO~-N leaching flux by 14％-56％.Controling irrigation and reducing nitrogen application rate could coordinate economic benefit and water environmental benefit of nitrogen application well,and it would be environment-friendly water and fertilizer management methods for Taihu Lake region. 【总页数】8页(199-206)
【关键词】NH+4-N;NO-3-N;渗漏淋溶;控制灌溉 【作者】尹海峰;焦加国;孙震;刘满强;李辉信;胡锋
【作者单位】南京农业大学资源与环境科学学院,南京210095;南京农业大学资源与环境科学学院,南京210095;南京农业大学资源与环境科学学院,南京210095;南京农业大学资源与环境科学学院,南京210095;南京农业大学资源与环境科学学院,南京210095;南京农业大学资源与环境科学学院,南京210095 【正文语种】中文
【中图分类】S153;S19 【文献来源】
https://www.zhangqiaokeyan.com/academic-journal-cn_soils_thesis/0201257128612.html 【相关文献】
1.不同氮肥管理模式对太湖流域稻田土壤氮素渗漏的影响 [J], 俞映倞; 薛利红; 杨林章
2.太湖地区稻麦轮作系统不同氮肥管理模式对麦季氮素利用与流失的影响研究 [J], 俞映倞; 薛利红; 杨林章
3.太湖地区稻田绿肥固氮量及绿肥还田对水稻产量和稻田土壤氮素特征的影响 [J], 袁嫚嫚; 刘勤; 张少磊; 陈武荣; 禹洪双
4.不同轮作模式对太湖地区大棚菜地土壤氮淋失的影响 [J], 陆扣萍; 闵炬; 施卫明; 王海龙
5.太湖地区稻田不同氮肥管理模式下氨挥发特征研究 [J], 俞映倞; 薛利红; 杨林章
以上内容为文献基本信息，获取文献全文请下载
不同水肥管理模式对太湖地区稻田土壤氮素渗漏淋溶的影响
