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三峡库区澎溪河流域消落区土壤氮磷释放研究
引用本文:林玉海,王楠,赵秀兰,何丙辉.三峡库区澎溪河流域消落区土壤氮磷释放研究[J].水土保持学报,2010,24(2).
作者姓名:林玉海  王楠  赵秀兰  何丙辉
作者单位:1. 西南大学,资源环境学院,重庆,400716
2. 西南大学,资源环境学院,重庆,400716;重庆市农业资源与环境重点实验室,重庆,400716;教育部三峡库区生态环境研究重点实验室,重庆,400715
基金项目:国务院三峡建设委员会资助项目(2007AA10Z123)
摘    要:通过模拟试验研究了温度和施肥对三峡库区澎溪河流域消落区冲积土、紫色土和水稻土氮磷释放的影响,估算了这3种土壤氮磷的释放量。结果表明,淹水后消落区土壤氮的释放潜力为水稻土冲积土紫色土,不同温度下消落土壤氮的释放潜力表现为20℃略高于10℃,明显高于30℃;消落区土壤间磷释放的差异因温度的不同而异,10℃时3种土壤间上覆水磷浓度相近,20℃和30℃时,土壤磷的释放潜力为冲积土紫色土水稻土,土壤磷的释放随淹水温度的提高而升高。按云阳县耕地平均施肥量(N0.21g/kg和P0.15g/kg)向消落区土壤施入氮磷肥,冲积土、紫色土和水稻土向水体释放的氮分别提高7.05~17.27,10.03~25.41,5.84~13.70倍,释放的磷分别提高1.47~4.88,4.99~16.49,1.18~3.03倍。根据澎溪河流域水温、水位变动情况及消落区土壤面积,估算出未施肥条件下澎溪河流域消落区冲积土、紫色土和水稻土的氮释放负荷为19.36,29.45,236.07t/a,磷释放负荷分别为0.49,0.94,1.91t/a。

关 键 词:消落区  氮磷释放  

Nitrogen and Phosphorous Release from Soils at Water Fluctuation Zone of Pengxi River in the Three Gorges Reservoir Area
LIN Yu-hai,WANG Nan,ZHAO Xiu-lan,HE Bing-hui.Nitrogen and Phosphorous Release from Soils at Water Fluctuation Zone of Pengxi River in the Three Gorges Reservoir Area[J].Journal of Soil and Water Conservation,2010,24(2).
Authors:LIN Yu-hai  WANG Nan  ZHAO Xiu-lan  HE Bing-hui
Institution:LIN Yu-hai1,WANG Nan1,ZHAO Xiu-lan1,2,3,HE Bing-hui1,3 (1.College of Resources , Environment,Southwest University,Chongqing 400716,2.The Key Laboratory of Agricultural Resources , Environment of Chongqing,3.Key Laboratory of Eco-environments in Three Gorges Reservoir Area,Ministry of Education,Chongqing 400715)
Abstract:Stimulated experiments were carried out to study the effect of temperature and fertilization on the release of nitrogen and phosphorous from three soils,namely,alluvial soil,purple soil and paddy soil at the water fluctuation zone (WFZ) of Pengxi River located in the Three Gorges Reservoir Area,the loadings of nitrogen and phosphorous from the three soils were also estimated.The results showed that the potential capacity for nitrogen release from soils followed the order of paddy soil>alluvial soil>purple s...
Keywords:water fluctuation zone  nitrogen and phosphorous release  
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