| 胡海燕,王益权,张育林,孙蕾,徐海.污染的灌溉水对农田土壤养分平衡的作用与影响[J].干旱地区农业研究,2010,28(5):129~132 |
| 污染的灌溉水对农田土壤养分平衡的作用与影响 |
| The action and influence of polluted irrigation water on soil nutrients balance |
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| DOI：10.7606/j.issn.1000-7601.2010.05.24 |
| 中文关键词: 污水灌溉 有机质 碱解氮 速效磷 速效钾 |
| 英文关键词:sewage irrigation organic matter alkali dispelled N available P available K |
| 基金项目:陕西省农业科技推广项目“2008关中灌区小麦玉米优质高效栽培模式试验与示范”(4130202、11203533) |
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| 中文摘要: |
| 灌溉水体的质量会直接影响到土壤有机碳及其养分平衡。本研究以陕西交口抽渭灌区农田土壤有机碳及养分变异状况为主要研究内容，以土壤发生类型一致和土地利用及其管理水平基本一致的井水灌溉和非灌溉农田土壤为对照，逐层分析了各灌溉处理土壤剖面0～100 cm范围有机质及主要养分含量，结果显示：长期用污染渭河水灌溉的农田土壤有机质、碱解氮、速效磷和速效钾等含量均有极为显著的增加，0～20
cm土层为养分富集区域，其中有机质、碱解氮、速效磷、速效钾分别为24.92 g/kg、108.26 mg/kg、155.45 mg/kg、353.72 mg/kg，比井灌区土壤分别增加了40.68%、44.98%、116.92%和44.27%，比不灌区土壤分别增加了35.74%、35.69%、189.27%和122.35%。试验资料充分证明，长期用污染渭河水灌溉的土壤呈现出了明显的富营养化问题，其中磷、钾含量严重过剩，在制定土壤管理和科学施肥方面应给予高度重视。 |
| 英文摘要: |
| The quality of irrigation water directly affects soil quality and soil nutrients balance. This study is mainly about soil organic carbon and nutrients variability in Jiaokou irrigation district in Shaanxi Provi
nce. The samples consisted of well water irrigation and no irrigation farmland soils, having the same conditions in soil genesis, usage and management. Then, we analyzed the amount of soil organic matter and main nutrients in different layers from 0～100 cm in soil profiles. The results show that the content of soil organic matter, alkali dispelled N, available P and available K in farmland were sharply higher in the swage irrigation treatment than in the well water irrigation treatment. And, in the 0～20 cm layers, the contents of soil organic matter, alkali dispelled N, available P and available K were 24.92 g/kg, 108.26 mg/kg, 155.45 mg/kg and 353.72 mg/kg, which were increased by 40.68%, 44.98%, 116.92% and 44.27% compared to the well water irrigation treatment, and by 35.74%, 35.69%, 189.27% and 122.35% compared to non irrigation treatment. The data in this
study sufficiently indicate that long-term sewage irrigation leads to eutrophication in soil profiles, particularly to surplus phosphorus and potassium, which should be paid much attention to in drafting the rules in terms of soil managem
ent and scientific fertilizer application. |
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