The Effect of Spacing and Nitrogen Fertilizer Dose on Growth and Yield of Cabbage Flowers (Brassica oleracea var. Botrytis L)

Abstract

The study entitled "The Effect of Spacing and Nitrogen Fertilizer Dose on Growth and Yield of Cabbage Flowers (Brassica oleracea var. Botrytis L.)", has been carried out in the research field of the Faculty of Agriculture, Muhammadiyah University of Yogyakarta, Tamantirto Village, Kasihan District, Bantul Regency, Yogyakarta Special Region . The altitude is 82 meters above sea level and the average temperature is 28^oC to 32^oC. This study aims to determine the effect of plant spacing and dosage of N fertilizer for growth and yield of cabbage flowers. In this study using a Factorial Design (4 x 4), which was arranged in a Completely Randomized Block Design (RALB) and repeated 3 times. The first factor is the spacing (J) consisting of 4 levels, namely J1 (40 x 30 cm), J2 (40 x 40 cm), J3 (40 x 50 cm), J4 (40 x 60 cm). The second factor is the dose of Nitrogen (N) fertilizer consisting of 4 levels, namely N1 (46 kg / ha), N2 (69 kg / ha), N3 (92 kg / ha), N4 (115 kg / ha). Observations were made on plant height, number of plant leaves, and crop production per hectare. The results showed that between treatment plant spacing and Nitrogen fertilizer doses did not show any interaction on all parameters observed. Planting cabbage flowers with a spacing of 40 x 40 cm produces a significantly higher flower weight than other spacing treatments. Fertilizing N doses 46 - 115 kg / ha does not affect the yield of flower cabbage, but the higher the dose tends to produce higher cabbage interest.