›› 2019, Vol. 31 ›› Issue (2): 297-306.DOI: 10.3969/j.issn.1004-1524.2019.02.16

• Environmental Science • Previous Articles     Next Articles

Characteristics of nitrogen and phosphorus loss by runoff from paddy and vegetable fields under different fertilization modes in Tiaoxi catchment

LIU Chen1, ZHANG Li2, LIN Yicheng1, GUO Bin1, FU Qinglin1, *, LI Hua1, DING Nengfei1   

  1. 1. Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China;
    2. Hangzhou Yuhang Mengyuan Agricultural Science and Technology Co., Ltd., Hangzhou 311115, China
  • Received:2018-04-16 Online:2019-02-25 Published:2019-03-06

Abstract: A continuous two-year field experiment with building runoff ponds on the typical paddy and vegetable lands in Tiaoxi basin was conducted to study the characteristics of nitrogen and phosphorus loss with surface runoff. The nitrogen loss was different between years due to the precipitation. The total nitrogen losses in 2016 and 2017 were 12.76-16.97, 15.40-17.60 kg·hm-2, respectively, in paddy field, and were 23.06-25.72, 18.11-27.93 kg·hm-2, respectively, in vegetable field. The total nitrogen loss was mainly in N$O-3$-N state in both paddy field and vegetable field. The total phosphorus losses in 2016 and 2017 were 2.36-2.62, 3.57-4.05 kg·hm-2, respectively, in paddy field. Compared with the conventional fertilization, nitrogen reduction or organic fertilizer did not significantly influence the phosphorus loss. The total phosphorus loss was mainly in soluble phosphorus state in paddy field, whereas it was the particle phosphorus state in vegetable field. The total nitrogen losses were higher in vegetable fields than that in paddy fields, but the total phosphorus losses were the opposite. The fertilizer reduction or organic fertilizer treatments decreased the N loss loading by 7%-35% as compared to the conventional treatment, yet maintained the yield.

Key words: Tiaoxi area, surface runoff, nitrogen reduction, organic fertilizer

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