期刊文献+

典型地区饱和土壤中硝态氮垂直运移及拟合 被引量:18

Nitrate Vertical Transport and Simulating Model in Saturated Soils in Typical Region
下载PDF
导出
摘要 采用室内土柱模拟的方法 ,研究了封丘地区农田土壤中硝态氮垂直运移规律 .结果表明 :在饱和条件下 ,不同浓度硝态氮溶液 (10 0mg·L-1、2 0 0mg·L-1)处理的土壤 ,硝态氮运移的穿透曲线间无明显影响 .用含有不同价态陪伴阳离子 (K+ 和Ca2 + )的硝态氮溶液处理黄潮土 0~ 30cm土层和风沙土 ,硝态氮运移的穿透曲线基本重合 ;而陪伴Ca2 + 硝态氮溶液处理的黄潮土 30~ 6 0cm、6 0~ 90cm土层中硝态氮出流时间具有滞后效应 .硝态氮溶液全部运移出土体所需时间越长 ,穿透曲线越平缓、峰值越低 .CXTFIT2 . 0数学模型估算的稳定水流条件下饱和土壤中硝态氮淋失量具有较高精度 ,相关系数均达到极显著水平 . By simulating soil column in laboratory, the nitrate vertical transport characteristics in farmland soil in Fengqu region of Henan Province were studied. The results show that, under saturated soil condition, the different concentrations of nitrate (100 mg·L -1、200mg·L -1) had no obvious influence on the breakthrough curves (BTCs) of nitrate vertical transport. When the soil columns were eluted by nitrate solution containing co-existing cations (K+ and Ca 2+), the BTCs of nitrate vertical transport in the topsoil(0~30cm) of yellow fluvo-aquic soil and aeolian sandy soil were very similar. However, the outflow time of nitrate in the middle and bottom soil layers in the yellow fluvo-aquic soil was significantly extended, when the soil columns were eluted by nitrate solution containing Ca 2+. The longer the outflow time of nitrate transport out of soil column was, the evener and lower the peak of the BTCs was. The mathematical model, CXTFIT2.0, could be applied to accurately estimate nitrate leaching mass in the saturated soil with steady-state flow condition. The fitted BTCs were in good agreement with the observed BTCs, which had high correlative coefficients(0.8594~0.9978).
出处 《环境科学》 EI CAS CSCD 北大核心 2005年第2期200-205,共6页 Environmental Science
基金 国家自然科学基金项目 (4 0 3 2 5 0 0 1 40 2 0 10 2 5 ) 中国科学院封丘农业生态站开放基金 (A99110 7)
关键词 封丘地区 硝态氮 垂直运移 CXTFIT2.0数学模型 Fengqiu region nitrate vertical transport CXTFIT2.0 model
  • 相关文献

参考文献19

二级参考文献34

  • 1冯绍元,张瑜芳,沈荣开.排水条件下饱和土中氮肥转化与运移模拟[J].水利学报,1995,27(6):16-22. 被引量:18
  • 2黄元仿,李韵珠,陆锦文.田间条件下土壤氮素运移的模拟模型Ⅰ[J].水利学报,1996,28(6):9-14. 被引量:31
  • 3冯绍元,张瑜芳,沈荣开.非饱和土壤中氮素运移与转化试验及其数值模拟[J].水利学报,1996,28(8):8-15. 被引量:20
  • 4张效年 赵安珍.红壤胶体的表面性状和离子吸附对表面电荷性质的影响[J].土壤学报,1988,125(2):164-174.
  • 5[3]Mallena Imbeah. Composting piggery waste: a review.Bioresource Technology, 1998, 63: 197 ~ 203.
  • 6[5]Haug R T. The Practical Handbook of Compost Engineering. Lewis Publishers, 1993, USA.
  • 7[6]Bernal M P, C Paredes et al. Maturity and stability parameters of composts prepared with a wide range of orgauic wastes. Bioresource Technology, 1998, 63: 91 ~ 99.
  • 8[7]Abdennaceur Hassen, Kaouala Belguith, Naceur Jedidi et al.Microbial characterization during composting of municipal solid waste. Bioresource Technology, 2001, 80:217 ~ 225.
  • 9[8]Francis J Larney et al. Physical changes during active and passive composting of beef feedlot manure in winter and summer. Bioresource Technology, 2000, 75: 139 ~ 148.
  • 10[9]Tiquia S M, N F Y Tam, I J Hodgkiss. Changes in chemical properties during composting of spent pig litter at differeut moisture contents. Agriculture, Ecosystems and Environment, 1998, 67:79 ~89.

共引文献104

同被引文献295

引证文献18

二级引证文献224

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部