| 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 |
| Key Words: sewage irrigation organic matter alkali dispelled N available P available K |
| Author Name | Affiliation | | HU Haiyan | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | WANG Yiquan | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | ZHANG Yulin | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | SUN Lei | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | XU Hai | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| 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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