Effect of organic manure and chemical fertilizer on nitrogen uptake and nitrate leaching in a Eum-orthic anthrosols profile |
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Authors: | Tong Yanan Ove Emteryd Lu Dianqing Harald Grip |
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Affiliation: | (1) Soil and Fertilizer Institute, Shaanxi Academy of Agricultural Sciences, 712100 Yangling, Shaanxi, China;(2) Department of Forest Ecology, Swedish University of Agricultural Sciences, S-901 83 Ume, Sweden |
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Abstract: | Distribution and accumulation of NO3-N down to 4 m depth in the soil profile of a long term fertilization experiment with organic manure and N and P chemical
fertilizer were studied after 12 years, wheat and corn were planted in each year. The apparent N recovery decreased with increased
N and P fertilizer. NO3-N was mainly accumulated in 0-1.2 m depth of the soil profile with a maximum of 34 mg N kg-1 for the treatment with 120 kg N and 26 kg P per hectare, a secondary maximum of 7.2 mg N kg-1 was found at 3.2 m depth in the same treatment. NO3-N accumulation in the soil profile was minimized in the trials with highest manure application. Nitrogen that was not recovered
was leached as NO3-N deeper than 4 m depth, was immobilized in the profile or was lost by denitrification.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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Keywords: | distribution and accumulation nitrate leaching organic manure and chemical fertilizer soil profile |
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