영년 혼파초지에 있어서 예취빈도와 질소시비수준이 NO$_3$-N의 유실에 미치는 영향

The Effect of Cutting Frequency and Nitrogen Fertilizing Level on NO_3-N Leaching Losses In the Pasture

This experiment was conducted to evaluate the effect of cutting frequency and nitrogen fertilization on $(NO_3$-N leaching losses under 12 years mixture permanent meadow, The results of this study were summarized as follows: 1. There was no difference in the $(NO_3$-N content of soil water within 1 m soil depth during the whole experimental period. It means that the content of $(NO_3$-N leaching losses was not influenced by botanical composition, cutting frequency and nitrogen fertilization in this experiment. 2. The level of $(NO_3$-N content during the whole experimental period was not in excess of 0.5 ppm level.