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Recommendation of Optimum Amount of Fertilizer Nitrogen Based on Soil Organic Matter for Chinese Cabbage and Cabbage in Volcanic Ash Soils of Cheju Island  

Song, Yo-Sung (National Institute of Agricultural Science and Technology, RDA)
Kwak, Han-Kang (National Institute of Agricultural Science and Technology, RDA)
Yeon, Byeong-Yeal (National Institute of Agricultural Science and Technology, RDA)
Lee, Choon-Soo (National Alpine Agricultural Experiment Station)
Yoon, Jung-Hui (National Institute of Agricultural Science and Technology, RDA)
Moon, Doo-Young (National Cheju Agricultural Experiment Station, Rural Development Administration)
Lee, Shin-Chan (Agricultural Environment Research Division, Cheju Provincial Agricultaural Technology Administration)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.35, no.2, 2002 , pp. 105-111 More about this Journal
Abstract
To find out the optimum nitrogen fertilization levels for the leafy vegetables in volcanic ash soils of Cheju island, fertilization effects on chinese cabbage chinese and cabbage were investigated through pot and field experiments. In pot experiment conducted with two volcanic ash soils of Cheju island, optimum rates of nitrogen fertilizer was ranged from 294 to $331kg\;ha^{-1}$ for chinese cabbage. At field experiment with one volcanic soil, the optimum N fertilizer was $331kg\;ha^{-1}$. On the basis of soil organic matters, fertilizer recommendation formula for cabbage, could be established by using 1.03 of comparison factors (F) compared with chinese cabbage : y=344.54-0.285x for chines cabbage, y= 354.88-0.294x for cabbage, where y is the recommendation amount of nitrogen fertilizer with x g $kg^{-1}$ of organic matter in soil. Actual optimum rate of nitrogen fertilizer for chinese cabbage under field condition was much more similar to the value caluculated by the revised nitrogen recommendation formula than the amount of nitrogen fertilizer recommended by the current formula in volcanic ash soil.
Keywords
Volcanic ash soil; Organic matter for chinese cabbage and cabbage;
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