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KMID : 0903619880290010001
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Journal of the Korean Society for Horticultural Science
1988 Volume.29 No. 1 p.1 ~ p.8
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The Effects of Nitrogten , Potassium Level , and Planting Density on the Growth and Productivity of Cabbage (Brassica oleracea L. var . capitata) in Summer
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이동우/Lee, Dong Woo
강춘길/오응용/윤평섭/Kang, Chung Kil/Oh, Eung Yong/Yoon, Pyung Seop
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Abstract
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This experiment was conducted to investigate the effects of nitrogen, potassium level and planting density on the growth and productivity of cabbage (Brassica oleracea L. var. capitata) in summer. The results obtained are as follows.
The cabbage cv. Uzi ＃1 was grown with 3 nitrogen levels (15, 30, and 45㎏ per l0a), 3 potassium levels (12, 24, and 36㎏ per l0a) and 3 row spacings (55, 65, and 75㎝). Plants given 15, 30㎏ per l0a were smaller than those given nitrogen of 45㎏ per l0a in the no. of inner leaf, head height, head diameter, head weight, total fresh weight, and yield, while a little effect was found in potassium levels. Yield increased with higher nitrogen levels and at higher plant densities but average yield components were greater at wider spacings. As a conclusion, the optimum level of nitrogen, potassium, and plant density for maximum yield of summer cultivation on cabbage is regarded as a best way to apply N 45㎏, P 20㎏, K 24㎏ per l0a and to transplant 55 × 45㎝ or 65 × 45㎝ plant density.
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