Nitrogen Fertilization Method on the Number of Leaves in Cultivation of Spring Cucumber by the Drip-Fertigation Technique

Abstract

The adaptability of a formula for estimating the amount of nitrogen absorbed (absorbed nitrogen (g/m²/14 days)=increased leaves (no./m²/14 days)×0.0441+2.189) in autumn cucumber, cultivated using drip tubes, was tested as a fertilization index. The amount of nitrogen applied was reduced to 31.9g/m², which constituted a saving of 24% over conventional fertilization methods, without reducing the yield.
The adaptability of this formula was tested, using five training methods, with different leaf appearance patterns. Although the yields differed, the amount of nitrogen fertilizer differed only slightly, in the range from 27.6 to 29.2g/m², which amounts to 63 to 51% of the 46.2g/m² used in conventional fertilization
In conclusion, this formula for estimating the amount of nitrogen absorbed can be applied to save fertilizer in the cultivation of autumn cucumber, grown using drip tubes.