柴河流域不同农田种植模式下沟渠底泥氮磷及有机质的赋存特征

发布时间：2018-02-10 18:53

本文关键词： 种植方式沟渠底泥养分赋存柴河流域　出处：《生态与农村环境学报》2017年06期 　论文类型：期刊论文

【摘要】：于旱季及雨季末期对柴河流域不同农田种植模式下沟渠底泥进行原位采集,分析了沟渠底泥中养分含量变化特征及影响养分变化的主要因素。结果表明:除有效磷外,沟渠底泥有机质、全氮、碱解氮及全磷含量均表现为大棚蔬菜地玉米地,说明不同农田利用及管理方式是导致沟渠底泥养分产生差异的主要因素,而沟渠水分条件及植被的变化则导致雨季前后沟渠底泥养分呈现不同的时空差异。沟渠养分的长期积累将影响沟渠湿地系统对径流污染物的去除能力。因此,优化农田种植方式及管理模式仍是滇池流域面源污染防控中最重要的内容之一。
[Abstract]:In the dry season and the end of rainy season, in situ sampling of channel bottom sediment under different farmland planting patterns in Chaihe basin was carried out. The variation characteristics of nutrient content in channel sediment and the main factors affecting nutrient change were analyzed. The results showed that, except for available phosphorus, The contents of organic matter, total nitrogen, alkali-hydrolyzed nitrogen and total phosphorus in ditch bottom mud were all shown as corn fields in greenhouse vegetable field, which indicated that different farmland utilization and management methods were the main factors leading to the difference of nutrient content in ditch bottom mud. However, the variation of water condition and vegetation results in different temporal and spatial differences of sediment nutrients in the channel before and after the rainy season. The long-term accumulation of nutrient in the channel will affect the removal capacity of runoff pollutants in the channel wetland system. It is still one of the most important contents in the prevention and control of non-point source pollution in Dianchi Lake Basin to optimize farmland planting mode and management mode.
【作者单位】：昆明学院生命科学与技术系;云南大学生态学与环境学院;
【基金】：云南省应用基础研究项目(2014FD040) 国家自然科学基金(31360152) 国家水体污染控制与治理科技重大专项(2012ZX07102-003) 昆明学院校级科研项目(XJL13012)
【分类号】：X52;X712

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