| Cite this article: | 项佳敏,丁志峰,杨琼瑶,等.5种源汇型农作景观组合控制农田养分流失的效果试验*[J].灌溉排水学报,0,():-. |
| XIANG Jia-min,DING Zhi-feng,YANG Qiong-yao,et al.5种源汇型农作景观组合控制农田养分流失的效果试验*[J].灌溉排水学报,0,():-. |
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| Effects of Five Types of Source-sink Farming Landscape Combination on Controlling Farmland Nutrient Loss |
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XIANG Jia-min, DING Zhi-feng, YANG Qiong-yao, ZHANG Ming-kui
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College of Environmental and Resource Sciences,Zhejiang University
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| Abstract: |
| [Objective] Using the difference in water demand and nutrient profit and loss of each production unit in the farmland system to construct a source-sink landscape combination to recycle water and nutrients, nitrogen and phosphorus emissions in the farmland system can be reduced. [Method] In order to verify the effectiveness of this technology, five typical source-sink agricultural landscape combination models, including vegetable field - Zizania latifolia field, vegetable field - paddy field, orchard - Zizania latifolia field, mulberry field - paddy field and orchard - lotus pond, were selected in Zhejiang province. Through three-year positioning observation from 2014 to 2017, the effects of reducing emissions of suspended solid, total P, water-soluble P, total N and water-soluble N from the farm were monitored. [Result]SThe results showed that, compared with the source farmland before sink treatment, the reduction percentages of suspended solid and nutrient loss of the five source-sink types of agricultural landscape combinations were more than 70%, with the averaged reduction percentages decreased in the order of total P (90.63%) > water-soluble P (89.14%) > suspended solid (88.72%) > water-soluble n (86.75%) > total N (86.64%). The results showed that the overall effect of five types of source-sink farming landscape combination was: orchard - lotus pond > vegetable land - Zizania latifolia field > orchard - Zizania latifolia > mulberry garden - paddy field > vegetable land - paddy field, and the effects of wetland with lotus pond or Zizania latifolia field were the best. [Conclusion]SThe reduction of pollutants was mainly realized by reducing drainage and absorbing and holding pollutants. |
| Key words: source-sink farming landscape combination; nutrient; drainage; recycling; absorption; absorption |
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