| 熊淑萍,姬兴杰,赵巧梅,马新明.不同肥料类型对土壤硝态氮时空变异的影响[J].干旱地区农业研究,2007,(6):171~176 |
| 不同肥料类型对土壤硝态氮时空变异的影响 |
| Effects of different fertilizers on the spatial-te mporal variations of soil nitrate |
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| DOI：10.7606/j.issn.1000-7601.2007.06.34 |
| 中文关键词: 肥料类型 硝态氮 时空动态 |
| 英文关键词:different fertilizer NO-3-N spatial-temporal variation |
| 基金项目:国家粮食丰产工程(河南课题)(2006BAB02A07-4)； “863”计划(2006AA10Z224) |
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| 中文摘要: |
| 采用土柱法研究不同肥料类型对土壤硝态氮时空分布动态的影响。结果表明,在不同肥料类型处理下,各土层中硝态氮含量出现峰值约在灌浆盛期,低谷在扬花期。在不同土层中,0~20 cm土层中硝态氮含量最高,并随土壤剖面深度的加深而下降。配施肥料处理中020 cm土层的硝态氮含量各生育时期均最高,20~40cm除灌浆盛期和成熟期外也以配施处理最高,40~120 cm土层中硝态氮含量在处理间无明显规律。土壤硝态氮主要累积在0~40 cm土层中,深层土壤中含量较少。尿素处理下,0~20 cm和20~40 cm土层中硝态氮含量分别占全生育期1.2 m土层总含量的5.6%和24.9%;有机肥处理下,分别占23.8%和24.8%;配施处理下,分别占8.2%和20.2%。1.2 m土体中的硝态氮含量在小麦生长旺盛期降低,生育后期升高。三种肥料类型处理,1.2 m深处硝态氮含量最高值为3.441 mg/kg,最低值为0.944 mg/kg,基本不存在由于淋失造成地下水污染的可能性。综合考虑小麦产量、品质与生态环境效益,三种肥料类型以尿素与有机肥配施为最佳。 |
| 英文摘要: |
| The effects of different fertilizers on the Temporal-spatial variations of soil nitrate are studied by virtue of soil column methods.The results show that the max value of nitrate content occurs approximately during grain filling stage,the min value of nitrate content occurs approximately during flowering stage in different depth of soil under different fertilizers.Nitrate contents in different depth of soil are the highest during jointing stage and take second place during over-winter stage without exception.Nitrate contents are highest in the soil layer of 0～20 cm in different depth of soil,the contents of nitrate decrease with the increasing depth of soil layer.Nitrate contents of the mixed fertilizer treatment in the soil layer of 0～20 cm during all the growth stages without exception are the highest except the active grain filling stage and mature stage,while nitrate contents in the soil layer of 40～120 cm in different treatments don't have obvious laws.Nitrate accumulates mostly in the soil layer of 0～40 cm and less in deep soil layers.Nitrate contents in the soil layer of 0～20 cm and 20～40cm each take possession of the total nitrate contents in the total soil of 1.2 m with 5.6% and 24.9% under carbamide treatment,with 23.8% and 24.8% under organic fertilizer treatment,with 8.2% and 20.2% under mixed fertilizer treatment.Nitrate contents in the total soil of 1.2m decrease during active growth stage and increase during latter growth stage.Basically,there is no possibility of groundwater pollution existed because of nitrate leaching under three fertilizer treatments because the highest and the lowest value is 3.441 mg/kg and 0.944 mg/kg respectively in the depth of 1.2 m. Synthetically,the mixed fertilizer treatment is the best choice between the three different fertilizers taking into account the benefits of yield,quality and ecological environment. |
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