Yazar "Kokten, K." seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • [ X ]
    Öğe
    Effects of sewage sludge used as fertilizer on the yield and chemical contents of common vetch (Vicia saliva L.) and soil
    (Agricultural Research Communication Centre, 2015) Saruhan, V.; Kusvuran, A.; Kokten, K.
    This study was conducted to determine the effects of sewage sludge (SS) used as fertilizer at different concentrations [Control, 20 kg ha(-1) nitrogen (N), 30 ton ha(-1) SS (Si), 60 ton ha(-1) SS (S2) and 90 ton ha(-1) SS (S3), 20 kg ha(-1) N + 30 ton ha(1) SS (N+SI), 20 kg ha(-1) N + 60 ton ha(-1) SS (N + S2) and 20 kg ha(-1) N + 90 ton ha(-1) SS (N + S3)] on common vetch yields and chemical features. For this purpose, an increasing level of SS was applied to the soil samples. The residuals of some heavy metal (Hg, Cr, Fe, Ni, Zn, Mn, Cd, Pb, Cu, Co, and Se) and macro element (K, Ca, Na, Mg, C, and S) concentrations were measured in leafs, seeds and soils. According to the results of this study, SS, when applied to soil in increasing amounts, raised the mineral matter contents of the plants, which favorably affected plant growth. Accordingly, it affected the herbage yield, increasing the yield in parallel with the increasing SS concentrations. Applying N with the SS positively influenced the heavy metal contents on leafs and seeds of common vetch and residue in the soil. Besides, the heavy metal contents were found at below critical levels in the soil, leaf and seeds. Therefore, SS application as fertilizer used in appropriate concentrations did not pollute the soil very much, but did lead to an increase in plant products.
  • [ X ]
    Öğe
    NUTRITIVE VALUE OF MEDITERRANEAN SHRUBS
    (Pakistan Agricultural Scientists Forum, 2012) Kokten, K.; Kaplan, M.; Hatipoglu, R.; Saruhan, V.; Cinar, S.
    Nutritive values of the leaves of Mediterranean shrubs Quercus coccifera, Calicotome villosa, Rhamnus oleoides ssp. graecus, Pistacia terebinthus, Paliurus spina-christi and Phillyrea latifolia, and Leuceana leucocephala, an introduced species were studied. These shrubs were hand harvested from three plots established in the experimental field at before flowering, flowering and bear fruit stages. The nutritive values were evaluated in terms of the chemical composition, dry matter (DM), organic matter (OM), relative feed value (RFV), dry matter intake (DMI) as well as digestible dry matter (DDM).Maturity had a significant effect on the chemical composition, DM, OM and estimated parameters (DDM, DMI and RFV) of the leaves of the shrub species. Neutral detergent fiber (NDF), acid detergent fiber (ADF) and condensed tannin (CT) contents increased with increasing maturity whereas the crude protein decreased. DM and estimated parameters also decreased with increasing maturity. CP, ADF, NDF, Ash and CT contents ranged from 6.4 to 33.3%, from 6.9 to 39.1%, from 10.1 to 50.5%, from 2.9 to 6.8% and from 0.7 to 15.8%, respectively. The OM and DM ranged from 93.2 to 97.1% and from 28.5 to 70.8%, respectively. The digestibility DM, DM intake and RFV ranged from 58.4 to 83.5%, from 2.4 to 11.9% and from 107.7 to 769.3, respectively ADF, NDF and condensed tannin contents of the leaves of the shrub species harvested at bear fruit stage were significantly higher than those harvested at before flowering and flowering stages, while CP contents and estimated parameters of the leaves of the shrub species harvested at flowering stage were significantly higher than those harvested at before flowering and bear fruit stages. The biplot analysis indicated negative correlation of CP content with OM and DM, whereas it is positively correlated with CT and ash contents. On the other hand, ADF was positively correlated with NDF, whereas it is negatively correlated with estimated parameters. The shrub species harvested at the proper stage of maturity offers considerable potential as high quality forage for ruminants during critical period in the semi arid and arid regions.