Judul: Pengaruh cekaman kekeringan dan aplikasi mikoriza terhadap morfo-fisiologis dan kualitas bahan organik rumput dan legum pakan
Abstrak: This research was aimed to evaluate the effect of drought stress and application Arbuscular Mycorrhizal Fungi (AMF) on morpho-physiological and organic matter quality of grasses and legumes forages. Using special cylindrical pot (20 cm diameter, 100 cm height) and twelve plants produced from the result of selection on preliminary studied from above thirty forage plants. Six species of grasses were Andropogon gayanus, Cenchrus ciliaris, Chloris gayana, Ischamemum timuriensis, Paspalum dilatatum and Paspalum notatum and six species of legumes were Stylosanthes guianensis, Stylosanthes hamata, Stylosanthes seabrana, Macroptilium bracteatum, Clitoria ternatea and Centrosema pascuorum with four treatments. The treatments were W0M0 (watering without AMF), W1M0 (drought without AMF ), W0M1 (watering with AMF) and W1M1 (drought with AMF). The data were analyzed by analysis of variance. Determination the best plant that tolerance to drought stress condition through scoring based on superscript each parameters. The result showed that Paspalum notatum and Stylosanthes seabrana was the most tolerance plant to drought stress. Both species of that plants harvested on 48 days after drought. The first harvest on 32 days after drought. Drought stress treatment significantly (p<0,05) reduced plant growth such as dry matter yield and root, relative water content, increased proline content and water soluble carbohydrate, and decreased gas production with digestibility of organic matter and crude protein content. Studied in vitro quality of organic material for both plants showed that drought stress caused decreasing in total gas production, organic matter digestibility and crude protein content. Treatment W0M1 (watering with AMF)) given the best value for all parameters.
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Judul: Morpho-Physiological Response Of Grass Feed Drought Stress On The Inoculated AMF(Arbuscula mycorrhiza fungi).
Abstrak: The research was aimed to evaluate the morpho-physicology response of grass innoculated with AMF (Arbuscula mychorrhiza fungi). This experiment used factorial completely randomized design. First factor is combination of drought and aplication AMF consisting of W0M0 (watering and without AMF), W0M1 (watering and with AMF), W1M0 (drought and without AMF), W1M1 (drought and with AMF) and the second factor are 10 species of grasses consisting of Chloris gayana, Setaria Splendida, Panicum maximum, Brachiaria humidicola, Digitariadecumben, Paspalum dilatatum, Stenotatum secundatum, Brachiaria decumbens, Melinis minutiflora, Paspalum notatum. Result of analysis of variance showed that. Result of analysis of variance showed there is interaction between drought treatments and application AMF with plant species at all parameters (P<0,01). Treatment application AMF given the best value for all parameters Aplication AMF of drought stress significantly (P<0,01) incresing yield production, decreasing water water potensial, water defisit and leaf relative water content. Determination the best plant tolerance based on sensitivity drought index. Result that paspalum dilatatum have the highest score.
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Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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