| 设施蔬菜土壤剖面氮磷钾积累及对地下水的影响 |
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| 引用本文： | 袁丽金,巨晓棠,张丽娟,王 珏,杨志新.设施蔬菜土壤剖面氮磷钾积累及对地下水的影响[J].中国生态农业学报,2010,18(1):14-19. |
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| 作者姓名： | 袁丽金 巨晓棠 张丽娟 王 珏 杨志新 |
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| 作者单位： | 1. 河北农业大学资源环境科学学院,保定,071000
2. 中国农业大学资源与环境学院,北京,100193 |
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| 基金项目： | 国家自然科学基金项目(30571110和30940048)、国家高技术研究发展计划(863计划)项目(2008AA06Z315) |
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| 摘 要： | 针对设施栽培中传统施肥灌溉带来的养分浪费和环境污染问题,采集河北省定州市设施蔬菜、农田土样及相应的地下水样品,分析了不同设施蔬菜种植年限土壤剖面中速效养分的累积规律及地下水受硝酸盐污染的程度。结果表明:0～200cm和0～400cm设施土壤的速效养分累积均高于对照农田。低龄棚硝态氮、速效磷、速效钾及水溶性磷含量分别为377.2mg·kg-1、448.8mg·kg-1、1405.6mg·kg-1、30.6mg·kg-1,分别是对照农田的4.7倍、4.6倍、1.4倍和11.5倍;老龄棚硝态氮、速效磷、速效钾及水溶性磷含量分别为629.1mg·kg-1、555.0mg·kg-1、2567.1mg·kg-1、35.2mg·kg-1,分别为对照农田的6.4倍、16.3倍、2.7倍和12.0倍。设施土壤速效养分深层累积比例随棚龄增加而增加。设施蔬菜栽培区表层地下水(地下饮用水,20m)受硝态氮污染严重,超标率和严重超标率为39.3%和7.1%;而深层地下水(农田和大棚灌溉水,40m)硝态氮含量7.4mg·L-1和9.6mg·L-1,超标率分别为25.0%和37.5%,无严重超标水样。
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| 关 键 词： | 硝态氮 速效磷 水溶性磷 速效钾 设施种植年限 设施土壤 地下水 |
NPK accumulation in greenhouse soil and its effect on groundwater |
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| YUAN Li-Jin,JU Xiao-Tang,ZHANG Li-Juan,WANG Jue and YANG Zhi-Xin.NPK accumulation in greenhouse soil and its effect on groundwater[J].Chinese Journal of Eco-Agriculture,2010,18(1):14-19. |
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| Authors: | YUAN Li-Jin JU Xiao-Tang ZHANG Li-Juan WANG Jue and YANG Zhi-Xin |
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| Institution: | College of Resources and Environmental Sciences, Hebei Agricultural University, Baoding 071000, China;College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China;College of Resources and Environmental Sciences, Hebei Agricultural University, Baoding 071000, China;College of Resources and Environmental Sciences, Hebei Agricultural University, Baoding 071000, China;College of Resources and Environmental Sciences, Hebei Agricultural University, Baoding 071000, China |
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| Abstract: | In allusion to the problems of fertilizer waste and environmental pollution brought about by traditional fertilization and irrigation, greenhouse and farmland soil samples along with corresponding groundwater samples in Dingzhou City, Hebei Province were collected. Then accumulated NPK in greenhouse soil profile and its effects on the groundwater were analyzed for different cultivation ages. The results show that accumulated available nutrients in the 0~200 cm and 0~400 cm greenhouse soil profiles are higher than in farmland soils. In soil of greenhouse within 10 years, nitrate (377.2 mg·kg-1), available P (448.8 mg·kg-1), available K (1 405.6 mg·kg-1) and water-soluble P (30.6 mg·kg-1) are respectively 4.7, 4.6, 1.4 and 11.5 times of the cropland soils. For greenhouse older than 10 years, the respective variables are 6.4, 16.3, 2.7 and 12.0 times. The proportion of available soil nutrient in deep soil profiles increases with cultivation age. NO3--N pollution in drinking water at the depth of 20 m is serious with common and serious overproof rates of 39.3% and 7.1% respectively. NO3--N content in irrigation water for farmland and greenhouse at the depth of 40 m is 7.4 mg·L-1 and 9.6 mg·L-1 with respective common overproof rates of 25.0% and 37.5%, and zero serious overproof rate. |
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| Keywords: | Nitrate Available P Water-soluble P Available K Greenhouse age Greenhouse soil Groundwater |
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