한국토양비료학회지 (Korean Journal of Soil Science and Fertilizer)
- 제16권2호
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- Pages.98-105
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- 1983
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- 0367-6315(pISSN)
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- 2288-2162(eISSN)
봄배추의 시비반응(施肥反應)에 미치는 토양수분(土壤水分) Potential의 영향(影響)
Fertilizer Responses of Chinese Cabbage to Soil Water Potential
- Eom, Ki-Cheol (Institute of Agricultural Science) ;
- Son, Eung-Ryong (College of Agriculture, Korea University) ;
- Yoo, Sun-Ho (College of Agriculture, Seoul National University)
- 발행 : 1983.06.25
초록
토양수분조건에 따른 시비반응을 구명(究明)하기 위하여 본량(本良) 사양토(砂壤土)에서 토양수분처리(
Differences in fertilizer responses of Chinese cabbage to soil water status were investigated in a field experiment. The growth pattern, water use, nutrient uptake, apparent efficiency of fertilizer and yield were analyzed under the 4-different fertilizer levels (N-P-K rate, kg/10a: 0-0-0 Fo, 11.5-10-12.5 Fo.5, 23-30-25 F1.0, 34.5-30-37.5 F1.5 and under the 4-different soil water status levels (non irrigated plot Mo, -0.1 to -1.0 bars M1, -0.1 to -0.5 bars M2, -0.1 to -0.2 bars M3). The soil was Bonryang sandy loam in the experimental farm of the Institute of Agricultural Sciences, Suweon. The growth and yield responses to the fertilizer levels showed a large difference between F0 and F0.5 but little differences were recognized between F0.5, F1.0 and F1.5 when the soil water potentials at 20-cm soil depth were lower than -2.0 bar. Under the well irrigated soil conditions, M2, and M3, the growth and yield responses to the fertilizer levels were significantly increased and the nutrient requirements were increased as well. The total uptake of nutrients decreased as the fertilizer amounts increased when the soil water potentials were low, while the total uptake of nutrients increased when the soil water potentials were high. Therefore, in considering nutrient availability of the applied fertilizers, the soil water status should be taken into account.
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