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不同施肥方式对设施菜地氮、磷地下淋溶的影响研究.doc 免费在线阅读

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2024-11-08 08:57

不同施肥方式对设施菜地氮、磷地下淋溶的影响研究.doc

北京城市学院2011届毕业设计（论文）不同施肥方式对设施菜地氮、磷地下淋溶的影响研宄不同施肥方式对设施菜地氮、磷地下淋溶的影响研宄学生姓名：陈继龙学号：10111501031 班级：10资源本1 专业：资源环境与城乡规划管理学部：城市建设指导教师：二O—四年三月不同施肥方式对设施菜地氮、磷地下淋溶的影响研宄不同施肥方式对设施菜地氮、磷地下淋溶的影响研宄学生：陈继龙班级：10资源本1学号:10111501031 学部：城市建设专业:资源环境与城乡规划管理指导教师：左强职称:助理研究员工作单位：北京市农林科学院毕业设计（论文）完成时间：自二O—四年一月至二O—四年三月在保护菜地的条件下，以苤蓝为供试作物，研究优化施肥、C/N调控、种植填闲作物等3种不同措施对土壤硝态氮累积与淋溶的影响。结果表明，种植当季，优化施肥和C/N调控处理均可有效阻控硝态氮淋溶。综合考虑苤蓝生长期和填闲，3种措施阻控硝态氮淋溶的强度，由强到弱依次为:植填闲作物〉优化施肥〉C/ N调控。建议控制施肥量的同时，采用合理的管理方式，多方面阻控硝态氮的累积与淋溶，保护环境安全。关键词:硝态氮淋溶保护菜地氮肥有效磷 TOC o 1-5 h z 绪i仑1 HYPERLINK l bookmark3 o Current Document h 1研究背景1 HYPERLINK l bookmark4 o Current Document h 1.1实验区域自然条件1 HYPERLINK l bookmark5 o Current Document h 1.2选点依据2 HYPERLINK l bookmark6 o Current Document h 1.3监测点所属分区2 HYPERLINK l bookmark7 o Current Document h 2试验点基本信息和实验方法介绍2 HYPERLINK l bookmark8 o Current Document h 1试验点基本信息2 HYPERLINK l bookmark9 o Current Document h 2.2 土壤形状分析2 2.3田间管理措施3 HYPERLINK l bookmark10 o Current Document h 2.4样品采集方法4 HYPERLINK l bookmark11 o Current Document h 2.5样品测试方法5 2.6计算方法6 HYPERLINK l bookmark12 o Current Document h 结果分析6 射仑1113 M15 Abstract In facility vegetable field，an experiment with kohlrabi for selected crops had been carried out，toresearch the effect of three different measures，which were fertilization optimization，C/N regulation andcatch crops planting(sweet corn)，on the nitrate nitrogen accumulation and leaching in soil. The results indi-Gated that fertilization optimization and C/N regulation were effective measures to reduce and control nitrateleaching in the kohlrabi planting season. The effects on the nitrate nitrogen leaching resistance were as fol-lows:Catch crops planting}fertilization optimization}C/N regulation. It was suggested that the rate of fer-tilizer application and the rational management modes should be comprehensively adopted to reduce nitrateaccumulation and leaching and protect the environment from pollut