engleski

Nitrogen leaching with subsurface drainage water

Average nitrate nitrogen leaching in drainpipe water from treatments 1 and 2 where crops were grown without mineral nitrogen fertilization varied from 7.2 to 7.5 kg per hectare. Compared to that, average nitrate nitrogen leaching at black fallow treatment was higher – ; 10.7 kgha-1. Nitrate nitrogen leaching in drainpipe water from treatments with mineral nitrogen fertilization varied from 7.9 kgha-1 at the treatment with 100 kgha-1 N up to the 30.5 kgha-1 at the treatment with 300 kgha-1 N. Compared to the average quantity of nitrogen applied, average quantity of NO3-N leached in drainpipe water from different trial treatments varied from 0 to 11.8% of applied mineral nitrogen.

subsurface drainage; nitrogen; leaching

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