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[1]CHEN Lei,HAO Ming-de,LI Zhan-bin.Effects of Long-term Application of Fertilizers on Nitrate Accumulation in the Loess Plateau Dryland[J].Research of Soil and Water Conservation,2014,21(02):43-46.

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Effects of Long-term Application of Fertilizers on Nitrate Accumulation in the Loess Plateau Dryland

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 21 Number of periods: 2014 02 Page number: 43-46 Column: Public date: 2014-04-28

Title:: Effects of Long-term Application of Fertilizers on Nitrate Accumulation in the Loess Plateau Dryland

Author(s):: CHEN Lei^1,2, HAO Ming-de², LI Zhan-bin²; 1. Magazines Company, Chang’an University, Xi’an 710064, China;
2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China

Keywords:: long-term experiment; fertilization; soil profile; nitrate; accumulation; leaching

CLC:: S153.6⁺1

DOI:: -

Abstract:: The nitrate distribution in the soil profile was analyzed based on a long-term fertilization experiment of continuous wheat in the fixed site since 1984. The results showed that NO₃^--N content was similar to that in the control and the phosphorus treatment after 12 years with organic fertilizer treatment only, and no nitrate leaching was found. The cumulative concentration peak NO₃^--N of the NPM treatment was between 60—140 cm, it was at about 100—120 cm in NP treatment. Moreover, for the N, NP, NPM treatments, the double peak of the cumulative NO₃^--N concentration appeared in both 60 cm and 200 cm depths showing a downward leaching trend. Thus the long-term continuous excessive application of manure still presented the ecology risk. The annual nitrate cumulative content could be as high as 73.5 kg/hm² in the N treatment, while the content also was 31.1 kg/hm² in the NP treatment which will cause a large amount of nitrate loss. But it had little effect on the pollution of the underground water due to the deep underground water table.

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