The Relationship between Growth of a Rose Plant and its Nutrient and Water Uptake in Hydroponic Culture.
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Accession number;99A0922072
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| Title;The Relationship between Growth of a Rose Plant and its Nutrient and Water Uptake in Hydroponic Culture. |
| Author;
TERADA MIKIHIKO
(Okayama Univ., Fac. of Agric.)
KAGEYAMA YOSHIHIRO
(Okayama Univ., Fac. of Agric.)
KONISHI KUNIYOSHI
(Okayama Univ., Fac. of Agric.)
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Journal Title;Journal of the Japanese Society for Horticultural Science
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Journal Code:F0626A
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ISSN:0013-7626
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VOL.66;NO.1;PAGE.149-155(1997)
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| Figure&Table&Reference;FIG.5, TBL.2, REF.18 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;To develop a new method of fertigation in cut flower production of roses, the relationships between plant growth and its nutrient and water uptake and the ratio of cut flower to plant growth were investigated. Two-year-old rose plants, cv. Sonia and Carl Red, grafted on Rosa multiflora Thunb. were grown hydroponically for about a year. The overall plant growth was determined by weighing separately cut flowers, prunings, defoliated leaves, roots, trunks, and old leaves. The growth rate decreased immediately after harvesting cut flowers and pruning. On a long term basis, however, the growth rate was slower in summer than in other seasons. Growth in 'Sonia' plants was faster than that in 'Carl Red' plants. After flower production had become stable, the ratio of cut flowers to plant growth on a fresh weight(FW) basis was always about 40% in both cultivars. The amounts of nutrients absorbed per 100g increments of plant FW in both cultivars were about N: 0.70g, P: 0.10g, K: 0.40g, Ca: 0.17g, and Mg: 0.04g. The amount of nutrients absorbed per 100g cut flowers were 2.5 times greater than those on per plant FW basis, 'Sonia' plants absorbed 2-3 liters of water in winter, 4-5 liters in spring and fall, and 8-9 liters in summer per 100g FW. 'Carl Red' plants absorbed more water than 'Sonia' plants. The concentration of nutrient absorbed by the plant (nutrient/water) was lower in summer than in winter, and that of 'Carl Red' was nearly 80% of 'Sonia'. The amount of nitrogen absorbed by 'Sonia' plant was about 230ppm in winter, 145ppm in spring and fall, and 110ppm in summer. The amounts of P, K, Ca, and Mg uptake by plants were on the average 14, 60, 24, and 6 percent of N, respectively. (author abst.) |
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