Journal article

Nitrogen leaching in an upland cropping system on an acid soil in subtropical China: lysimeter measurements and simulation

Bo Sun, Deli Chen, Yong Li, Xingxiang Wang

NUTRIENT CYCLING IN AGROECOSYSTEMS | SPRINGER | Published : 2008

Abstract

The effect of rainfall and nitrogen (N) input on nitrate leaching in a rain-fed peanut-oilseed rape system on an acidic soil in subtropical China was investigated in a field lysimeter experiment from 1997 to 2000. Drainage and nitrate leaching were simulated using the Water and Nitrogen Management Model (WNMM). Nitrate concentrations in the drainage water and nitrate leaching increased with increasing N application rate. Annual leaching losses ranged from 21.1 to 46.3 kg N ha⁻¹ (9.5-16.8%) for inputs between 0 and 150 kg N ha⁻¹. Growth of oilseed rape decreased the nitrate concentration in the drainage water, but growing N fixing peanuts did not. Rainfall had a greater impact on nitrate leac..

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