Effect of Sea Lettuce (Ulva lactuca) on Soil Water Holding Capacity

Yıl 2011, Cilt: 15 Sayı: 1, 30 - 35, 01.06.2011

Ömer Hulusi Dede Gülgün Dede Serkan Özdemir

Öz

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Anahtar Kelimeler

Sea lettuce, soil, growing media, water holding capacity, organic matter.

Su Yosunu (Ulva lactuca)'nun Toprağın Su Tutma Kapasitesine Etkisi

Öz

In this study, the effect of sea lettuce (Ulva lactuca) on soil water-holding capacity and the variation by over time were investigated. Sea lettuce (algae) was collected from the Black Sea coast, rinsed with rain water and dried to constant weight. Dried algae were added to soil at rate of 0%, 2.5%, 5%, 10% and 20%. Mixtures were filling the pots and incubated for 0, 20, 40, 60 days at 25 ºC. At the end of the incubation, soil organic matter and water holding capacity were determined. Adding of algae to soil was increased the porosity and water holding capacity. The amount of the organic matter was decreased by the incubation progress. At the 20 and 40 days, micro-porosity was increased, air capacity decreased and water-holding capacity has not changed. At the 60th incubation days, reduction of organic matter content was slowed, air capacity was reached to normal values and water holding capacity was decreased. Total porosity was not changed. At the beginning (0th) and the 60th incubation days, the distinctive dose was obtained at 5% for porosity and water holding capacity increases. Increased doses of the above have been limited. The optimum dose of 5% as determined by the addition of algae was increased soil water holding capacity by 48% on average.

Anahtar Kelimeler

Su yosunu, toprak, yetiştirme ortamı, su tutma kapasitesi, organik madde.

Kaynakça

• Abedi Koupai, J., Sohrab, F., Swarbrick, G., 2008. Evaluation of hydrogel on soil water retention characteristics. Journal of Plant Nutrition. 31, 317-331.
• Haslam, S.F.I., Hopkins, D.W., 1996. Physical and biological effects of kelp (seaweed) added to soil. Applied Soil Ecology. 3, 257–261.
• Lopez Mosquera, M.E., Pazos, P., 1997. Effects of seaweed on potato yields and soil chemistry. Biological Agriculture & Horticulture. 14, 199-205.
• Crouch, I.J., Vanstaden, J., 1993. Evidence for the presence of plant-growth regulators in commercial seaweed products. Plant Growth Regul. 13, 21–29.
• Standart Of Europian, Potting Mixes, Une-En 13650.
• Martinez, F.X.,1992. Proposal of methodology for the determination of the physical properties of the substrata. Minutes of Gardening, 11, pp. 55-66.
• Verdonck, O., Gabriels, R. 1992. Reference method for the determination of physical and chemical properties of plant substrates. Acta Hort. 302: 169-179.
• Nelson, D.W., Sommers, L.E., 1982. Total carbon, organic carbon and soil organic matter. In: Methods of Soil Analysis, Part II. ASASSSA, Madison, WI. 539–579.